Storm Prediction Center

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0125 AM CDT Mon Jun 01 2026 Valid 021200Z - 031200Z ...Synopsis... Fire weather concerns for Tuesday will primarily be associated with dry lightning potential across parts of far eastern Arizona and western New Mexico. A weak upper wave is evident off the Baja CA coast that will migrate east towards the Southwest over the next 24 hours. Weak pressure falls across the interior West will promote eastward low-level moisture transport into the southern Rockies. The western periphery of the moist plume should spread into eastern AZ by Tuesday afternoon with PWAT values on the order of 0.4 to 0.5 inch. While modest, this will provide sufficient buoyancy to support isolated thunderstorms as weak ascent overspreads the region ahead of the approaching wave. A deeply mixed boundary layer and 15-20 knot storm motions will help limit rainfall amounts and support the potential for dry lightning strikes over a region with receptive fine fuels after several days of warm and dry conditions. ..Moore.. 06/01/2026 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0125 AM CDT Mon Jun 01 2026 Valid 021200Z - 031200Z ...Synopsis... Fire weather concerns for Tuesday will primarily be associated with dry lightning potential across parts of far eastern Arizona and western New Mexico. A weak upper wave is evident off the Baja CA coast that will migrate east towards the Southwest over the next 24 hours. Weak pressure falls across the interior West will promote eastward low-level moisture transport into the southern Rockies. The western periphery of the moist plume should spread into eastern AZ by Tuesday afternoon with PWAT values on the order of 0.4 to 0.5 inch. While modest, this will provide sufficient buoyancy to support isolated thunderstorms as weak ascent overspreads the region ahead of the approaching wave. A deeply mixed boundary layer and 15-20 knot storm motions will help limit rainfall amounts and support the potential for dry lightning strikes over a region with receptive fine fuels after several days of warm and dry conditions. ..Moore.. 06/01/2026 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0125 AM CDT Mon Jun 01 2026 Valid 021200Z - 031200Z ...Synopsis... Fire weather concerns for Tuesday will primarily be associated with dry lightning potential across parts of far eastern Arizona and western New Mexico. A weak upper wave is evident off the Baja CA coast that will migrate east towards the Southwest over the next 24 hours. Weak pressure falls across the interior West will promote eastward low-level moisture transport into the southern Rockies. The western periphery of the moist plume should spread into eastern AZ by Tuesday afternoon with PWAT values on the order of 0.4 to 0.5 inch. While modest, this will provide sufficient buoyancy to support isolated thunderstorms as weak ascent overspreads the region ahead of the approaching wave. A deeply mixed boundary layer and 15-20 knot storm motions will help limit rainfall amounts and support the potential for dry lightning strikes over a region with receptive fine fuels after several days of warm and dry conditions. ..Moore.. 06/01/2026 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0123 AM CDT Mon Jun 01 2026 Valid 011200Z - 021200Z ...NO CRITICAL AREAS... ...Synopsis... Fire weather concerns will remain limited for today across the country. Early-morning surface observations continue to show a very dry air mass across eastern AZ to central NM where fuels have been slowly curing. Modest southwesterly flow aloft will persist across the central Rockies, and will promote weak surface pressure falls along the High Plains. Consequently, flow across the Southwest/southern Rockies will remain fairly weak again today with only localized areas where winds will exceed 15 mph (most likely in terrain-prone regions of northern NM). As such, the potential for widespread fire weather concerns will remain limited. Similarly, anomalously dry conditions will continue across the Great Lakes region for today, but building surface high pressure will modulate wind speeds and the overall fire weather threat. ..Moore.. 06/01/2026 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0123 AM CDT Mon Jun 01 2026 Valid 011200Z - 021200Z ...NO CRITICAL AREAS... ...Synopsis... Fire weather concerns will remain limited for today across the country. Early-morning surface observations continue to show a very dry air mass across eastern AZ to central NM where fuels have been slowly curing. Modest southwesterly flow aloft will persist across the central Rockies, and will promote weak surface pressure falls along the High Plains. Consequently, flow across the Southwest/southern Rockies will remain fairly weak again today with only localized areas where winds will exceed 15 mph (most likely in terrain-prone regions of northern NM). As such, the potential for widespread fire weather concerns will remain limited. Similarly, anomalously dry conditions will continue across the Great Lakes region for today, but building surface high pressure will modulate wind speeds and the overall fire weather threat. ..Moore.. 06/01/2026 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0123 AM CDT Mon Jun 01 2026 Valid 011200Z - 021200Z ...NO CRITICAL AREAS... ...Synopsis... Fire weather concerns will remain limited for today across the country. Early-morning surface observations continue to show a very dry air mass across eastern AZ to central NM where fuels have been slowly curing. Modest southwesterly flow aloft will persist across the central Rockies, and will promote weak surface pressure falls along the High Plains. Consequently, flow across the Southwest/southern Rockies will remain fairly weak again today with only localized areas where winds will exceed 15 mph (most likely in terrain-prone regions of northern NM). As such, the potential for widespread fire weather concerns will remain limited. Similarly, anomalously dry conditions will continue across the Great Lakes region for today, but building surface high pressure will modulate wind speeds and the overall fire weather threat. ..Moore.. 06/01/2026 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0123 AM CDT Mon Jun 01 2026 Valid 011200Z - 021200Z ...NO CRITICAL AREAS... ...Synopsis... Fire weather concerns will remain limited for today across the country. Early-morning surface observations continue to show a very dry air mass across eastern AZ to central NM where fuels have been slowly curing. Modest southwesterly flow aloft will persist across the central Rockies, and will promote weak surface pressure falls along the High Plains. Consequently, flow across the Southwest/southern Rockies will remain fairly weak again today with only localized areas where winds will exceed 15 mph (most likely in terrain-prone regions of northern NM). As such, the potential for widespread fire weather concerns will remain limited. Similarly, anomalously dry conditions will continue across the Great Lakes region for today, but building surface high pressure will modulate wind speeds and the overall fire weather threat. ..Moore.. 06/01/2026 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0103 AM CDT Mon Jun 01 2026 Valid 011200Z - 021200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL PLAINS...AND THE MID-SOUTH... ...SUMMARY... Thunderstorms with large hail and severe wind gusts are expected Monday afternoon and evening across parts of the central Plains. Scattered strong to severe wind gusts will also be possible from the Ozarks southeastward into parts of the Southeast. ...Synopsis... An upper low over the northern Rockies will remain roughly in place during the period. Moderate mid-level flow will extend into the central Rockies. Rich moisture will be present from the Ozarks into the Mid-South/Southeast. ...Colorado into western Nebraska and western Kansas... Moderate mid-level flow is expected to persist across the central Rockies along the southeastern flank of the upper low. This flow will gradually diminish into southwest Kansas. With a surface low developing in the vicinity of the Raton Mesa, moist upslope flow will occur within the Front Range. Storms will initially develop within the higher terrain and progress east. Storms near the surface low will develop by late afternoon. Initial supercells can be expected with a large to very-large hail risk. Hail around 2 inches is more probable in northeast Colorado into southwest Nebraska where upper-level flow will be stronger. A tornado or two will also be possible with initial discrete storms given the backed surface winds east of the Front Range. With time, upscale growth of activity can be expected, particularly in Kansas where strong heating will promote larger temperature-dewpoint spreads and steep low-level lapse rates. Where clustering can occur, a greater severe wind threat will develop. Given the somewhat narrow corridor of moderate to strong buoyancy and enough deep-layer shear that may limit duration of linear organization, confidence is low in placement of greater wind probabilities. ...Mid-South... Convection that is currently ongoing in eastern Kansas/western Missouri is expected to track south and east with time. Ahead of this activity, a reservoir of 70+ F dewpoints will exist across the Mid-South into parts of the Southeast. Depending on the timing of the convection, some strengthening of this activity can be expected into the afternoon. Mid-level flow across the region will not be overly strong, but around 30 kt of effective shear appears reasonable. Wind probabilities were increased within the Mid-South to account for the anticipated MCS. There still remains some question over the timing/placement of convection early this morning. Adjustments to the Slight risk may be needed depending on observational trends. ...Arkansas... Model trends show potential for convection to develop along outflow and move into strong/extreme buoyancy in Arkansas. As in the Mid-South, timing of when this occur will play a role in the intensity of the activity, especially given the weaker shear with southwestward extent. Damaging winds and isolated large hail are possible with the strongest activity. ...Northern Plains... Stronger mid-level flow around the upper low will be present in this region. Moisture/buoyancy will be more limited, however. Cold temperatures aloft will promote an isolated hail risk with storms that develop in the surface trough. ..Wendt/Moore.. 06/01/2026 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0103 AM CDT Mon Jun 01 2026 Valid 011200Z - 021200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL PLAINS...AND THE MID-SOUTH... ...SUMMARY... Thunderstorms with large hail and severe wind gusts are expected Monday afternoon and evening across parts of the central Plains. Scattered strong to severe wind gusts will also be possible from the Ozarks southeastward into parts of the Southeast. ...Synopsis... An upper low over the northern Rockies will remain roughly in place during the period. Moderate mid-level flow will extend into the central Rockies. Rich moisture will be present from the Ozarks into the Mid-South/Southeast. ...Colorado into western Nebraska and western Kansas... Moderate mid-level flow is expected to persist across the central Rockies along the southeastern flank of the upper low. This flow will gradually diminish into southwest Kansas. With a surface low developing in the vicinity of the Raton Mesa, moist upslope flow will occur within the Front Range. Storms will initially develop within the higher terrain and progress east. Storms near the surface low will develop by late afternoon. Initial supercells can be expected with a large to very-large hail risk. Hail around 2 inches is more probable in northeast Colorado into southwest Nebraska where upper-level flow will be stronger. A tornado or two will also be possible with initial discrete storms given the backed surface winds east of the Front Range. With time, upscale growth of activity can be expected, particularly in Kansas where strong heating will promote larger temperature-dewpoint spreads and steep low-level lapse rates. Where clustering can occur, a greater severe wind threat will develop. Given the somewhat narrow corridor of moderate to strong buoyancy and enough deep-layer shear that may limit duration of linear organization, confidence is low in placement of greater wind probabilities. ...Mid-South... Convection that is currently ongoing in eastern Kansas/western Missouri is expected to track south and east with time. Ahead of this activity, a reservoir of 70+ F dewpoints will exist across the Mid-South into parts of the Southeast. Depending on the timing of the convection, some strengthening of this activity can be expected into the afternoon. Mid-level flow across the region will not be overly strong, but around 30 kt of effective shear appears reasonable. Wind probabilities were increased within the Mid-South to account for the anticipated MCS. There still remains some question over the timing/placement of convection early this morning. Adjustments to the Slight risk may be needed depending on observational trends. ...Arkansas... Model trends show potential for convection to develop along outflow and move into strong/extreme buoyancy in Arkansas. As in the Mid-South, timing of when this occur will play a role in the intensity of the activity, especially given the weaker shear with southwestward extent. Damaging winds and isolated large hail are possible with the strongest activity. ...Northern Plains... Stronger mid-level flow around the upper low will be present in this region. Moisture/buoyancy will be more limited, however. Cold temperatures aloft will promote an isolated hail risk with storms that develop in the surface trough. ..Wendt/Moore.. 06/01/2026 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0103 AM CDT Mon Jun 01 2026 Valid 011200Z - 021200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL PLAINS...AND THE MID-SOUTH... ...SUMMARY... Thunderstorms with large hail and severe wind gusts are expected Monday afternoon and evening across parts of the central Plains. Scattered strong to severe wind gusts will also be possible from the Ozarks southeastward into parts of the Southeast. ...Synopsis... An upper low over the northern Rockies will remain roughly in place during the period. Moderate mid-level flow will extend into the central Rockies. Rich moisture will be present from the Ozarks into the Mid-South/Southeast. ...Colorado into western Nebraska and western Kansas... Moderate mid-level flow is expected to persist across the central Rockies along the southeastern flank of the upper low. This flow will gradually diminish into southwest Kansas. With a surface low developing in the vicinity of the Raton Mesa, moist upslope flow will occur within the Front Range. Storms will initially develop within the higher terrain and progress east. Storms near the surface low will develop by late afternoon. Initial supercells can be expected with a large to very-large hail risk. Hail around 2 inches is more probable in northeast Colorado into southwest Nebraska where upper-level flow will be stronger. A tornado or two will also be possible with initial discrete storms given the backed surface winds east of the Front Range. With time, upscale growth of activity can be expected, particularly in Kansas where strong heating will promote larger temperature-dewpoint spreads and steep low-level lapse rates. Where clustering can occur, a greater severe wind threat will develop. Given the somewhat narrow corridor of moderate to strong buoyancy and enough deep-layer shear that may limit duration of linear organization, confidence is low in placement of greater wind probabilities. ...Mid-South... Convection that is currently ongoing in eastern Kansas/western Missouri is expected to track south and east with time. Ahead of this activity, a reservoir of 70+ F dewpoints will exist across the Mid-South into parts of the Southeast. Depending on the timing of the convection, some strengthening of this activity can be expected into the afternoon. Mid-level flow across the region will not be overly strong, but around 30 kt of effective shear appears reasonable. Wind probabilities were increased within the Mid-South to account for the anticipated MCS. There still remains some question over the timing/placement of convection early this morning. Adjustments to the Slight risk may be needed depending on observational trends. ...Arkansas... Model trends show potential for convection to develop along outflow and move into strong/extreme buoyancy in Arkansas. As in the Mid-South, timing of when this occur will play a role in the intensity of the activity, especially given the weaker shear with southwestward extent. Damaging winds and isolated large hail are possible with the strongest activity. ...Northern Plains... Stronger mid-level flow around the upper low will be present in this region. Moisture/buoyancy will be more limited, however. Cold temperatures aloft will promote an isolated hail risk with storms that develop in the surface trough. ..Wendt/Moore.. 06/01/2026 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0103 AM CDT Mon Jun 01 2026 Valid 011200Z - 021200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL PLAINS...AND THE MID-SOUTH... ...SUMMARY... Thunderstorms with large hail and severe wind gusts are expected Monday afternoon and evening across parts of the central Plains. Scattered strong to severe wind gusts will also be possible from the Ozarks southeastward into parts of the Southeast. ...Synopsis... An upper low over the northern Rockies will remain roughly in place during the period. Moderate mid-level flow will extend into the central Rockies. Rich moisture will be present from the Ozarks into the Mid-South/Southeast. ...Colorado into western Nebraska and western Kansas... Moderate mid-level flow is expected to persist across the central Rockies along the southeastern flank of the upper low. This flow will gradually diminish into southwest Kansas. With a surface low developing in the vicinity of the Raton Mesa, moist upslope flow will occur within the Front Range. Storms will initially develop within the higher terrain and progress east. Storms near the surface low will develop by late afternoon. Initial supercells can be expected with a large to very-large hail risk. Hail around 2 inches is more probable in northeast Colorado into southwest Nebraska where upper-level flow will be stronger. A tornado or two will also be possible with initial discrete storms given the backed surface winds east of the Front Range. With time, upscale growth of activity can be expected, particularly in Kansas where strong heating will promote larger temperature-dewpoint spreads and steep low-level lapse rates. Where clustering can occur, a greater severe wind threat will develop. Given the somewhat narrow corridor of moderate to strong buoyancy and enough deep-layer shear that may limit duration of linear organization, confidence is low in placement of greater wind probabilities. ...Mid-South... Convection that is currently ongoing in eastern Kansas/western Missouri is expected to track south and east with time. Ahead of this activity, a reservoir of 70+ F dewpoints will exist across the Mid-South into parts of the Southeast. Depending on the timing of the convection, some strengthening of this activity can be expected into the afternoon. Mid-level flow across the region will not be overly strong, but around 30 kt of effective shear appears reasonable. Wind probabilities were increased within the Mid-South to account for the anticipated MCS. There still remains some question over the timing/placement of convection early this morning. Adjustments to the Slight risk may be needed depending on observational trends. ...Arkansas... Model trends show potential for convection to develop along outflow and move into strong/extreme buoyancy in Arkansas. As in the Mid-South, timing of when this occur will play a role in the intensity of the activity, especially given the weaker shear with southwestward extent. Damaging winds and isolated large hail are possible with the strongest activity. ...Northern Plains... Stronger mid-level flow around the upper low will be present in this region. Moisture/buoyancy will be more limited, however. Cold temperatures aloft will promote an isolated hail risk with storms that develop in the surface trough. ..Wendt/Moore.. 06/01/2026 Read more

MD 0929 CONCERNING SEVERE THUNDERSTORM WATCH 258... FOR PORTIONS OF EASTERN KANSAS AND WESTERN MISSOURI
Mesoscale Discussion 0929 NWS Storm Prediction Center Norman OK 1053 PM CDT Sun May 31 2026 Areas affected...portions of eastern Kansas and western Missouri Concerning...Severe Thunderstorm Watch 258... Valid 010353Z - 010600Z The severe weather threat for Severe Thunderstorm Watch 258 continues. SUMMARY...Multiple areas of thunderstorms are developing/ongoing across eastern Kansas and western Missouri. This trend will continue into the overnight. Large hail and damaging winds are the main threats, but a tornado cannot be ruled out for any storms interacting with surface boundaries. DISCUSSION...Several areas of thunderstorms are underway across eastern Kansas and western Missouri this evening. One such area is across the Flint Hills where earlier splitting supercells occurred and produced reports of 1-2" hail (near Emporia). Additionally, a brief tornado was reported by spotters near Madison, KS (Greenwood County) as the right split interacted with a diffuse outflow boundary. The left split has since dissipated as it moved northeast toward Kansas City, but the right split is very slowly moving east along the boundary. Additional thunderstorms across the Flint Hills in the wake of the initial convection. Additional thunderstorms are developing farther west, near Wichita, KS, and farther north to the southeast of Salina, KS. The storms near Wichita have struggled to sustain their intensity, with the storms to the north exhibiting supercellular characteristics. Lastly, recently radar imagery is showing development to the southeast of Kansas City, MO, across portions of west-central Missouri. Although these cells have struggled through the evening, lightning has recently been observed with this activity. Overall, the environment across eastern Kansas and western Missouri remains favorable for severe thunderstorms this evening. Thermodynamically, an impressive nocturnal CAPE reservoir remains in place with MUCAPE values in excess of 4000 J/kg across western portions of Severe Thunderstorm Watch #258. Kinematically, effective-layer shear remains between 35-50 knots across the region. Thus, the primary severe threats with any sustained thunderstorm updraft will have the potential to produce very large hail and damaging winds. Given the persistent extreme instability across the region, tornadoes cannot be ruled out with any discrete storm interacting with one of a myriad of surface boundaries (outflow, cold front, dryline, etc) across the watch. With time, the slow movement of the storms, especially the Flint Hills cluster, should tend toward messy storm interactions and a tendency to grow upscale as updraft outflows congeal together. This may result in an increasing damaging wind potential manifest as a small MCS moving east into Missouri. ..Marsh.. 06/01/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LSX...SGF...EAX...TOP...ICT... LAT...LON 37389330 37649490 37579600 37009653 37029778 38159766 38669733 39259623 39579453 39599325 39229235 37469220 37389330 MOST PROBABLE PEAK TORNADO INTENSITY...85-110 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN Read more

WW 0258 Status Updates
STATUS REPORT ON WW 258 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..KERR..06/01/26 ATTN...WFO...ICT...TOP...SGF...EAX... STATUS REPORT FOR WS 258 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC001-003-011-015-017-031-035-045-059-073-079-087-091-103-107- 111-115-121-127-139-173-177-191-197-207-209-010640- KS . KANSAS COUNTIES INCLUDED ARE ALLEN ANDERSON BOURBON BUTLER CHASE COFFEY COWLEY DOUGLAS FRANKLIN GREENWOOD HARVEY JEFFERSON JOHNSON LEAVENWORTH LINN LYON MARION MIAMI MORRIS OSAGE SEDGWICK SHAWNEE SUMNER WABAUNSEE WOODSON WYANDOTTE MOC013-015-029-033-037-039-047-053-059-083-085-089-095-101-105- 107-141-159-165-167-177-185-195-217-010640- MO . MISSOURI COUNTIES INCLUDED ARE BATES BENTON CAMDEN CARROLL CASS CEDAR CLAY COOPER DALLAS Read more

WW 0259 Status Updates
STATUS REPORT ON WW 259 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 E OLU TO 20 NW TQE TO 10 SE SUX. ..KERR..06/01/26 ATTN...WFO...DMX...OAX... STATUS REPORT FOR WS 259 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC003-009-027-029-047-071-085-129-133-137-145-155-161-165-173- 010640- IA . IOWA COUNTIES INCLUDED ARE ADAMS AUDUBON CARROLL CASS CRAWFORD FREMONT HARRISON MILLS MONONA MONTGOMERY PAGE POTTAWATTAMIE SAC SHELBY TAYLOR NEC021-025-053-055-153-155-177-010640- NE . NEBRASKA COUNTIES INCLUDED ARE BURT CASS DODGE DOUGLAS SARPY SAUNDERS WASHINGTON THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL Read more

WW 0257 Status Updates
STATUS REPORT ON WW 257 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 SSW SUX TO 30 NW SLB TO 5 NNW SPW. REMAINING VALID PORTION OF WW 257 MAY BE ALLOWED TO EXPIRE AT 01/07Z. ..KERR..06/01/26 ATTN...WFO...FSD... STATUS REPORT FOR WS 257 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC041-059-093-193-010600- IA . IOWA COUNTIES INCLUDED ARE CLAY DICKINSON IDA WOODBURY THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0257 Status Updates
STATUS REPORT ON WW 257 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 SSW SUX TO 30 NW SLB TO 5 NNW SPW. REMAINING VALID PORTION OF WW 257 MAY BE ALLOWED TO EXPIRE AT 01/07Z. ..KERR..06/01/26 ATTN...WFO...FSD... STATUS REPORT FOR WS 257 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC041-059-093-193-010600- IA . IOWA COUNTIES INCLUDED ARE CLAY DICKINSON IDA WOODBURY THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0257 Status Updates
STATUS REPORT ON WW 257 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 SSW SUX TO 30 NW SLB TO 5 NNW SPW. REMAINING VALID PORTION OF WW 257 MAY BE ALLOWED TO EXPIRE AT 01/07Z. ..KERR..06/01/26 ATTN...WFO...FSD... STATUS REPORT FOR WS 257 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC041-059-093-193-010600- IA . IOWA COUNTIES INCLUDED ARE CLAY DICKINSON IDA WOODBURY THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0257 Status Updates
STATUS REPORT ON WW 257 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 SSW SUX TO 30 NW SLB TO 5 NNW SPW. REMAINING VALID PORTION OF WW 257 MAY BE ALLOWED TO EXPIRE AT 01/07Z. ..KERR..06/01/26 ATTN...WFO...FSD... STATUS REPORT FOR WS 257 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC041-059-093-193-010600- IA . IOWA COUNTIES INCLUDED ARE CLAY DICKINSON IDA WOODBURY THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 257 SEVERE TSTM IA MN NE SD 010105Z - 010600Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 257 NWS Storm Prediction Center Norman OK 805 PM CDT Sun May 31 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northwest Iowa Southwest Minnesota Northeast Nebraska Southeast South Dakota * Effective this Sunday night and Monday morning from 805 PM until 100 AM CDT. * Primary threats include... Scattered large hail events to 1.5 inches in diameter possible Isolated damaging wind gusts to 70 mph possible A tornado or two possible SUMMARY...A few supercells and severe multicells will be possible through the evening. Large hail, locally damaging winds will remain possible, and some tornado risk will exist particularly with storms initiating/occurring near the boundary across the region. The severe thunderstorm watch area is approximately along and 45 statute miles east and west of a line from 30 miles west northwest of Worthington MN to 10 miles southeast of Sioux City IA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU7). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 29020. ...Guyer Read more

MD 0928 CONCERNING SEVERE THUNDERSTORM WATCH 257...259... FOR PORTIONS OF THE MISSOURI RIVER VALLEY
Mesoscale Discussion 0928 NWS Storm Prediction Center Norman OK 1046 PM CDT Sun May 31 2026 Areas affected...Portions of the Missouri River Valley Concerning...Severe Thunderstorm Watch 257...259... Valid 010346Z - 010545Z The severe weather threat for Severe Thunderstorm Watch 257, 259 continues. SUMMARY...The severe threat is gradually waning across far southeast South Dakota/northwest Iowa as storms continue to grow upscale. Further south, trends continue to be monitored for robust convective initiation, though confidence in storm coverage is limited. DISCUSSION...Local radar imagery from KFSD shows continued upscale growth of initially semi-discrete supercells into a more consolidated convective band. GOES IR imagery also shows the onset of a weakening trend as cloud-top temperatures begin to warm. New cell development continues on the southern flank of the band; however, the onset of nocturnal stabilization is evident in regional web cams and by modifying the 00 UTC OAX RAOB to local surface observations. Increasing inhibition will likely begin to modulate the potential for further cell development heading later into the evening hours (especially in the absence of stronger forcing for ascent). Consequently, it appears likely that the recent weakening trend and the overall severe threat will continue to wane. Further south, convection appears to be struggling against the aforementioned nocturnal stabilization as weak thunderstorms continue to dissipate within an hour or so after initiation. Percolating congestus is noted in GOES IR imagery west of I-29 and north of I-80 along the surface trough/dryline, and recent RRFS solutions hint at more robust initiation in this region by around 06 UTC. Given the favorable kinematic environment sampled by the 00 UTC OAX sounding, severe thunderstorms remain possible if deep convection can become established. However, given the lack of appreciable forcing for ascent and increasing inhibition, these RRFS solutions appear bullish. ..Moore.. 06/01/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DMX...FSD...OAX... LAT...LON 40639584 40529610 40519643 40639683 40709704 40859722 41029735 42359693 43329658 43519631 43469530 43259514 42899504 42449500 42029511 41129558 40639584 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN Read more