Storm Prediction Center

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0101 AM CDT Fri May 22 2026 Valid 231200Z - 241200Z ...NO CRITICAL AREAS... ...Synopsis... Upper-level troughing will persist across the northern Great Plains/Midwest on D2/Saturday as ridging begins to build across the southern Great Plains and Four Corners region. Upper-level ridging will also remain in place across the Southeast, with largely zonal flow across the Pacific Northwest. At the surface, a frontal system is forecast to extend from the southern/central Great Plains eastward through the mid-Mississippi Valley and into the Mid-Atlantic. Several mid-level perturbations will promote the potential for wetting rainfall across much of the Southern Plains and eastern US. This pattern is expected to largely dampen fire weather concerns across much of the eastern CONUS. Farther west, generally light surface winds are expected to preclude widespread fire weather concerns across much of the West. The exception will be across portions of the Great Basin where localized breezy conditions (winds of 10-15 mph) may briefly overlap reduced RH values of 10-15%. This may promote locally elevated fire weather concerns across portions of the area; however, elevated highlights have been withheld at this time given the expectation for any such overlap to remain limited in duration. ..Chalmers.. 05/22/2026 ...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 1259 AM CDT Fri May 22 2026 Valid 221200Z - 231200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE SOUTHERN HIGH PLAINS... ...SUMMARY... Thunderstorms with large hail and severe wind gusts will be possible from late this afternoon into the evening in parts of the southern High Plains. Isolated severe gusts and hail may occur in parts of the mid Missouri Valley. A few severe gusts and a marginal tornado threat will also be possible from the central Gulf Coast States into the Tennessee and southern Ohio Valleys. ...Southern High Plains... A mid-level shortwave trough will move eastward into the southern High Plains today. Ahead of the trough, a moist and unstable airmass will be located across most of Texas and Oklahoma. Thunderstorms are expected to develop late this afternoon on the moisture gradient from the western Texas Panhandle southward into west Texas. These storms will move eastward across the southern High Plains during the late afternoon and evening. The strongest instability is forecast to develop this afternoon over the low Rolling Plains of northwest Texas, where model forecasts have MLCAPE peaking in the 2000 to 3000 J/kg range. Late afternoon forecast soundings in northwest Texas have 0-6 km shear around 30 knots with 700-500 mb lapse rates near 8 C/km. This environment will support the development of supercells with large hail and severe wind gusts. Hailstones greater than 2 inches in diameter will be possible with supercells that become dominant. The greatest severe threat is expected to be in the evening as a broken line of storms moves into the stronger instability from the eastern Texas Panhandle southward into northwest Texas. ...Mid Missouri Valley... An upper-level trough and an associated mid-level jet streak will move northeastward today across the north-central U.S. At the surface, an axis of low-level moisture will be in place from eastern Kansas northward into eastern Nebraska. Ahead of the trough, scattered thunderstorms will develop in the afternoon along and near the moist axis. Surface dewpoints in the lower to mid 60s F will contribute to weak instability with MLCAPE likely peaking in the 500 to 1000 J/kg range across eastern Nebraska. RAP forecast soundings near Omaha suggest that 0-6 km shear will reach 35 knots as the trough approaches this afternoon, which would support the development of low-topped supercells capable of isolated severe wind gusts and hail. The severe threat is expected to persist into the early evening. ...Central Gulf Coast States/Ohio and Tennessee Valleys... A negatively-tilted mid-level shortwave trough will move northeastward today across the east-central U.S. Ahead of the trough, low-level moisture advection will take place. By early afternoon, surface dewpoints will be from the mid 60s to lower 70s F from the central Gulf Coast states northward into the southern Ohio Valley. Moderate instability is expected by afternoon across much of the region with MLCAPE peaking between 1500 and 2500 J/kg. Locally stronger instability is expected across central Mississippi, east-central Kentucky, eastern Tennessee and northeast Georgia. As surface temperatures warm during the day, scattered thunderstorms will develop and move northeastward across the moist airmass. Steepening low-level lapse rates will support a potential for isolated severe wind gusts. In addition, hodographs across this unstable airmass are forecast to be somewhat curved, which should also support a marginal tornado threat. ..Broyles/Chalmers.. 05/22/2026 Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0100 AM CDT Fri May 22 2026 Valid 221200Z - 231200Z ...NO CRITICAL AREAS... ...Synopsis... Longwave upper-level troughing will persist across much of the western CONUS and Great Plains today, with an embedded shortwave trough ejecting northeastward across the northern Great Plains through the period. Light to moderate northwesterly flow aloft will prevail over the western CONUS, with well above normal surface temperatures expected. Simultaneously, a surface low will develop eastward across the northern Great Plains, with a trailing cold front extending towards the Four Corners region and a quasi-stationary/warm front extending eastward through the mid-Mississippi Valley and into the Mid-Atlantic. Slightly below normal to near-normal temperatures will prevail across much of the Plains and the eastern CONUS with chances for wetting rainfall across much of these regions. Given these conditions, widespread fire weather concerns are not expected today. Locally elevated conditions may be possible across portions of southern/central New Mexico and West Texas where boundary layer mixing will promote minimum RH values of 5-15%. Elevated highlights have been withheld at this time, however, given the expectation for southwesterly winds to remain generally light (10-15 mph). ..Chalmers.. 05/22/2026 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

No watches are valid as of Thu May 21 05:57:02 UTC 2026.

No Mesoscale Discussions are in effect as of Thu May 21 05:57:02 UTC 2026.

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1250 AM CDT Thu May 21 2026 Valid 221200Z - 231200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS PORTIONS OF THE SOUTHERN PLAINS... ...SUMMARY... Scattered strong to severe storms will be possible across portions of the southern Plains with potential for large hail and damaging wind. ...Synopsis... Two weak shortwaves, with one wave in central Plains and a secondary wave into the Tennessee/Ohio Valleys, are forecast within the broader Northern Rockies trough through afternoon on D2/Friday. A surface low will be located across eastern New Mexico/southeastern Colorado with a front lifting northward into Kansas and a dryline extending southward into southwestern Texas. Another surface low will develop across the Mississippi and Ohio Valleys with a warm front lifting northward across Kentucky. These features will be the focus for scattered thunderstorm development in both regions by the afternoon/evening. ...Southern and Central Plains... Scattered thunderstorm development is expected across the Cap Rock near the dryline in Texas and back into eastern New Mexico along the high terrain Friday afternoon and evening. Steep low to mid-level lapse rates will be in place across much of the region from eastern New Mexico into western Texas. Dew points in the mid 50s to low 60s and daytime heating will yield moderate instability amid deep layer shear around 30-40 kts. This will promote initial supercells across the high terrain with potential for additional multi-cell clusters through time. These may grow upscale into an MCS into western Oklahoma by the evening. The primary risk will be for large hail before the damaging wind risk increases into the evening. A few additional strong thunderstorms may extend into portions of southern Kansas. The thermodynamic environment becomes less favorable with northern extent due to widespread cloud cover and morning precipitation. However, increasing mid-level flow and shear may allow for a few organized cells with potential for large hail and strong to severe wind further north. ...Tennessee and Ohio Valleys... A warm front will lift across northern Tennessee into Kentucky through the afternoon on Friday, with 60-70s dew points streaming northward ahead of the approaching mid-level wave. Modest height falls are expected across western Kentucky into the Ohio Valley, with an increase in 850-700 mb flow. Widely scattered thunderstorms are expected overnight into Friday morning. An increase in this activity can be expected as a vorticity maxima and increasing large scale ascent into the afternoon occurs. Though instability will be marginal, guidance does suggest a plume of higher theta-e air may advect into western/central Kentucky by the afternoon. In addition, guidance suggests a few transient supercells will be possible with potential for damaging winds and perhaps a tornado. ..Thornton.. 05/21/2026 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1252 AM CDT Thu May 21 2026 Valid 211200Z - 221200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF EASTERN COLORADO... ...SUMMARY... Thunderstorms with a threat for large hail, isolated severe gusts and possibly a tornado are expected in parts of eastern Colorado from mid afternoon to early evening. Isolated large hail will also be possible in parts of the southern High Plains this afternoon. ...Central and Southern High Plains... An upper-level trough will move eastward into the central Rockies today. Ahead of the trough, a lee surface low will form over eastern Colorado. As surface temperatures warm, convection will initiate in the higher terrain near Denver and Colorado Springs. From this convection, storms will develop and move eastward into the central High Plains during the afternoon. In eastern Colorado, a north-to-south axis of instability will be in place by afternoon, where model forecasts have MLCAPE peaking around 1500 J/kg. In addition, late afternoon RAP forecast soundings in eastern Colorado have 0-6 km shear in the 45 to 55 knot range with 700-500 mb lapse rates near 8 C/km. This will be favorable for supercells with large hail and isolated severe gusts. If a supercell can become locally dominant, then a tornado will also be possible. The severe threat will likely persist into early evening. Further south into the southern High Plains, an axis of instability will be in place by afternoon. The strongest instability is forecast on the Caprock of west Texas, where 0-6 km shear is forecast to be around 30 knots. This, along with 700-500 mb lapse rates near 7 C/km, may be enough for an isolated large hail threat. ..Broyles/Squitieri.. 05/21/2026 Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1058 PM CDT Wed May 20 2026 Valid 221200Z - 231200Z ...NO CRITICAL AREAS... ...Synopsis... By Day 2/Friday, the shortwave trough within the larger-scale mid-level trough over the western CONUS will continue eastward, advancing over the central Plains and Midwest. This leaves light to moderate northwest flow aloft over the western 1/4 of the CONUS amid well above normal surface temperatures. Meanwhile, a transitory ridge over the eastern 1/3 of the CONUS will exist amid post-frontal below normal temperatures in most locations with chances for wetting rainfall. Thus, the only area that stands opportunity of concerning fire weather would be over far western TX and neighboring areas of NM. However, with only terrain-driven diurnal wind (near 10-15 mph) combined with RHs of 12-18% during peak heating over that area, highlights have been ruled out with this forecast issuance. ..Stearns.. 05/21/2026 ...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 1058 PM CDT Wed May 20 2026 Valid 211200Z - 221200Z ...NO CRITICAL AREAS... ...Synopsis... With mid-level troughing dominating the western CONUS, a shortwave trough and associated jet max within the larger-scale pattern will briefly amplify winds over portions of the central/southern Rocky Mountains today. However, this feature appears to round the base of the larger trough tonight into the early morning of Day 2/Friday. Additionally, a cold front will move through the southern Great Basin by late in the Day 1 period on early Friday morning. ...Southwest... Ahead of the cold front, localized terrain-enhanced southwesterly winds will increase to 10-20 mph as RH falls to 10-20% at peak heating. A narrow region of stronger west-southwesterly winds (15-25 mph) will develop across eastern UT and western CO prior to the cold front arrival, though displaced from the lowest RH. As the front passes in the evening, brief gusty northerly winds and increased surface moisture will move over the region. The more localized nature of elevated fire weather conditions and sparsely continuous fuels precludes the introduction of highlights. ..Stearns.. 05/21/2026 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

No watches are valid as of Wed May 20 06:16:02 UTC 2026.

No Mesoscale Discussions are in effect as of Wed May 20 06:16:02 UTC 2026.

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1252 AM CDT Wed May 20 2026 Valid 211200Z - 221200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF SOUTHEASTERN COLORADO...NORTHEASTERN NEW MEXICO...AND THE FAR WESTERN OKLAHOMA AND TEXAS PANHANDLES... ...SUMMARY... Isolated severe storms are possible across parts of the central and southern High Plains Thursday afternoon and evening. ...Synopsis... A mid-level shortwave will translate eastward across the central Rockies on D2/Thursday. At the surface, a cold front will move through the northern High Plains while a secondary stationary front remains in place from the Carolinas through the Tennessee Valley into Ozark Plateau. A few strong to severe storms capable of large hail and damaging wind will be possible near the front range in Colorado. ...Central and Southern High Plains... Upslope flow into eastern Colorado will combine with modest upper-level forcing for ascent to allow for isolated to widely scattered thunderstorms near the high terrain. Steep lapse rates, MLCAPE 500-1000 J/kg, and deep layer shear around 30-35 kts from south of I-70 will allow for a few better organized cells capable of large hail and damaging wind. This threat will decrease with eastern extent into KS/OK where strengthening MLCIN will temper the severe threat downstream. Additional areas of scattered thunderstorm activity will be possible across southern Oklahoma into northern/central Texas and across far western Texas in the afternoon. Generally weak deep layer shear should limit the severe risk. A few instances of gusty winds and small hail will be possible. ...Elsewhere... Widely scattered thunderstorms are expected across the northern Rockies into the northern Plains near the upper-low. Weak moisture and limited instability will likely keep storms sub-severe. Widely scattered thunderstorms will also be likely south of the stationary front from the Carolinas into the Tennessee and Mississippi Valleys. While marginal instability will be in place, weak deep layer shear profiles will lead to more disorganized storms and limit the overall severe threat. ..Thornton.. 05/20/2026 Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1251 AM CDT Wed May 20 2026 Valid 211200Z - 221200Z ...NO CRITICAL AREAS... ...Synopsis... On Day 2/Thursday, a shortwave trough and associated mid-level jet streak will transit through the Intermountain West. There is some uncertainty given trends in the recent forecast guidance as to how far south this feature will dig and the timing of when it will progress over the central/southern Rockies. A cold front will continue to progress south/eastward over the Eastern Seaboard. ...Southwest... Conditions on Day 2/Thursday will be somewhat similar to Day 1/Wednesday with southwesterly surface winds of 10-20 mph and brief afternoon RHs of 10-20%. Given the uncertainty associated with the aforementioned shortwave trough, marginally elevated conditions outside of a synoptically-supported fire weather environment, and more sparsely continuous fuels, no highlighted areas were introduced with this forecast issuance. ...Maine... One location that will miss out on much of any accumulating precipitation with the aforementioned cold front passage is the northeastern corner of the CONUS. With this offshore flow (sustained winds of 10-15 mph) in place at the surface, RHs will also dip down near 25-35% behind the front on Day 2/Thursday. Additionally, heavy dead fuels will remain near the 80-90th percentile. However, well established green up at this point will preclude any highlighted areas. ..Stearns.. 05/20/2026 ...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 1250 AM CDT Wed May 20 2026 Valid 201200Z - 211200Z ...Synopsis... The remnants of a significant mid-level trough will remain over the western CONUS today. Given the colder weather and precipitation across some areas of the CONUS, the Southwest will be the region of primary concern today. However, by mid-afternoon today, 500 mb winds will struggle to reach 40 mph over much of the Southwest. Meanwhile, northwest mid-level flow continues over the Pacific Northwest while the jet max formerly over the southern Plains continues to progress eastward with a cold front surging offshore of the eastern US. ...Southwest... Near-normal surface temperatures for this time of year and a well-mixed boundary layer in place over the Southwest will contribute to south/southwesterly surface winds of 10-20 mph and minimum RHs of 10-20%. These weather conditions in place over receptive fuels (ERCs hovering around 80-90th percentile) will yield Elevated, with some locally critical, fire weather conditions today from around 10 AM local time to around sunset. ..Stearns.. 05/20/2026 ...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 1205 AM CDT Wed May 20 2026 Valid 201200Z - 211200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF WEST TEXAS... ...SUMMARY... Scattered severe storms with large hail and isolated severe gusts are expected today across parts of west Texas. A few storms with isolated severe gusts and hail will also be possible from the central Appalachians into the Mid-Atlantic and far southern New England. ...Southern High Plains... Southwesterly mid-level flow will remain in place today over the south-central U.S. At the surface, a quasi-stationary front will be positioned from west Texas eastward into the Texas Hill Country. South of the front, surface dewpoints in the 70s F will result in an axis of moderate instability. The strongest instability is forecast to develop from the lower Rio Grande River Valley north-northwestward into far west Texas and eastern new Mexico. As instability increases during the day and low-level convergence becomes focused along the front, scattered thunderstorms are expected to develop across far west Texas. These storms will move eastward into west-central Texas by early to mid evening. Additional storms may develop further north-northwest into eastern New Mexico. RAP forecast soundings along the instability axis in the late afternoon from Fort Stockton northward to Midland have MLCAPE near 2000 J/kg. 0-6 km is forecast to be around 50 knots with 700-500 mb lapse rate from 7 to 8 C/km. This environment will be favorable for supercells with large hail. The more dominant storms will have potential for hailstones greater than 2 inches in diameter. Isolated severe wind gusts will also be possible. A more isolated severe threat may also develop further north-northwest across the southern High Plains along the instability axis. ...Central Appalachians/Mid-Atlantic/Far Southern New England... West-southwesterly mid-level flow will be in place today across much of the eastern U.S. At the surface, a cold front will advance southward across the central Appalachians and Mid-Atlantic. To the south of the front, surface dewpoints in the upper 60s F will enable an axis of moderate instability to develop by afternoon. MLCAPE is forecast to peak in the 1000 to 2000 J/kg range in most areas ahead of the front. Increasing low-level convergence near the front will lead to scattered thunderstorm development during the afternoon. These storms will move eastward across the central Appalachians, Mid-Atlantic and far southern New England. RAP forecast soundings at 21Z along and near the instability axis have 0-6 km shear up to 25 knots with steep low-level lapse rates. This should support a severe threat with multicell storms. Isolated severe wind gusts and hail will be possible. The severe threat may persist into the early evening. ..Broyles/Squitieri.. 05/20/2026 Read more

MD 0783 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR SOUTH TEXAS
Mesoscale Discussion 0783 NWS Storm Prediction Center Norman OK 0130 AM CDT Tue May 19 2026 Areas affected...South Texas Concerning...Severe potential...Watch unlikely Valid 190630Z - 190830Z Probability of Watch Issuance...20 percent SUMMARY...A bowing complex of thunderstorms continues to move east across far south Texas. The environment ahead of the cluster remains extremely unstable. Strong winds and isolated hail may be possible with the core of these storms. A watch is currently not expected. DISCUSSION...An HP multicell cluster across northern Mexico has evolved into a small bowing cluster as it moves east across south Texas this morning. This complex appears to be aided by modest deep layer ascent in associated with a 70-knot 300-mb jet streak moving northeast from the base of the western North American longwave trough. The 20260519/00Z Corpus Christi sounding observed an extremely unstable airmass, with MUCAPE in excess of 4500 J/kg. Morning objectively analyzed fields suggest MUCAPE remains in excess of 4000 J/kg. The observed sounding also sampled a very moist airmass, with precipitable water in excess of 2". Thus, heavy, water-laden downdrafts will support the possibility of damaging winds with this complex, despite the observed weak low-level lapse rates. Given the degree of instability, isolated hail cannot be ruled out. The limited spatial extent of this bowing complex (one storm only a couple of counties wide, rapidly approaching the coast) should preclude the need for a watch, although conditions will continue to be monitored. ..Marsh/Gleason.. 05/19/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...CRP...BRO... LAT...LON 27149953 27419910 27829894 28109904 28319917 28569850 28529780 28469715 28329681 28159665 27909659 27579668 27289695 27119728 27059791 27149953 MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN Read more

WW 0229 Status Updates
STATUS REPORT ON WW 229 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 W CSM TO 15 NW END TO 30 N PNC TO 45 NE CNU. ..GLEASON..05/19/26 ATTN...WFO...ICT...SGF...OUN...TSA... STATUS REPORT FOR WS 229 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC001-011-019-021-035-037-049-099-125-133-205-207-190740- KS . KANSAS COUNTIES INCLUDED ARE ALLEN BOURBON CHAUTAUQUA CHEROKEE COWLEY CRAWFORD ELK LABETTE MONTGOMERY NEOSHO WILSON WOODSON MOC009-011-015-039-057-085-097-109-119-145-185-217-190740- MO . MISSOURI COUNTIES INCLUDED ARE BARRY BARTON BENTON CEDAR DADE HICKORY JASPER LAWRENCE MCDONALD NEWTON ST. CLAIR VERNON OKC009-011-035-039-043-047-053-071-073-083-093-103-105-113-115- 117-119-129-147-149-190740- Read more

WW 229 SEVERE TSTM KS MO OK 190435Z - 191200Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 229 NWS Storm Prediction Center Norman OK 1135 PM CDT Mon May 18 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southeast Kansas Far Southwest Missouri North-Central and Far Northeast Oklahoma * Effective this Monday night and Tuesday morning from 1135 PM until 700 AM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1.5 inches in diameter possible A tornado or two possible SUMMARY...Strong to severe thunderstorms will remain possible along a cold front as it slowly drifts southeastward into north-central/far northeast Oklahoma, southeast Kansas, and southwest Missouri. Damaging gusts are the primary severe hazards, although isolated hail is possible as well. There is also a low-probability risk of a brief line-embedded tornado. The severe thunderstorm watch area is approximately along and 35 statute miles north and south of a line from 20 miles west of Enid OK to 35 miles north northeast of Monett MO. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9). 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. && OTHER WATCH INFORMATION...CONTINUE...WW 227...WW 228... 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 27030. ...Mosier Read more

WW 0228 Status Updates
STATUS REPORT ON WW 228 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 SSW JEF TO 45 NNE COU TO 25 NW UIN TO 20 S BRL. ..GLEASON..05/19/26 ATTN...WFO...DVN...LSX... STATUS REPORT FOR WS 228 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MOC007-027-051-111-127-173-190740- MO . MISSOURI COUNTIES INCLUDED ARE AUDRAIN CALLAWAY COLE LEWIS MARION RALLS 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 228 SEVERE TSTM IA MO 190230Z - 190900Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 228 NWS Storm Prediction Center Norman OK 930 PM CDT Mon May 18 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Eastern Iowa Northeast Missouri * Effective this Monday night and Tuesday morning from 930 PM until 400 AM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph likely Scattered large hail events to 1.5 inches in diameter possible A tornado or two possible SUMMARY...A line of thunderstorms currently ongoing from central Iowa through north-central/northwest Missouri is expected to continue eastward/southeastward this evening. Environmental conditions support a continued risk of damaging gusts. A low-probability threat for brief line-embedded tornadoes is possible as well. The severe thunderstorm watch area is approximately along and 30 statute miles east and west of a line from 55 miles north northeast of Cedar Rapids IA to 15 miles south southwest of Jefferson City MO. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU8). 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. && OTHER WATCH INFORMATION...CONTINUE...WW 225...WW 227... 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 24035. ...Mosier Read more