Storm Prediction Center

WW 0514 Status Updates
STATUS REPORT ON WW 514 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 NW COD TO 30 SSE 3HT TO 20 NNE MLS. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1737 ..SQUITIERI..07/26/26 ATTN...WFO...BYZ...TFX...GGW... STATUS REPORT FOR WS 514 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-009-087-095-103-111-260240- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARBON ROSEBUD STILLWATER TREASURE YELLOWSTONE 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 514 SEVERE TSTM MT 252050Z - 260400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 514 NWS Storm Prediction Center Norman OK 250 PM MDT Sat Jul 25 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southern into Central and Eastern Montana * Effective this Saturday afternoon and evening from 250 PM until 1000 PM MDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 80 mph likely Isolated large hail events to 1 inch in diameter possible SUMMARY...Scattered thunderstorms are forecast to intensify this afternoon and move east across the Watch area through the evening. The stronger thunderstorms will be capable of a risk for mainly severe gusts 60 to 80 mph. A transition from mainly cells to a small thunderstorm cluster will probably occur during the evening. A localized threat for marginally severe hail may accompany the stronger thunderstorm cores this afternoon. The severe thunderstorm watch area is approximately along and 85 statute miles north and south of a line from 45 miles west northwest of Bozeman MT to 130 miles east northeast of Billings MT. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU4). 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 513... AVIATION...A few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 70 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 26030. ...Smith Read more

MD 1737 CONCERNING SEVERE THUNDERSTORM WATCH 514... FOR PORTIONS OF SOUTHERN MONTANA
Mesoscale Discussion 1737 NWS Storm Prediction Center Norman OK 0834 PM CDT Sat Jul 25 2026 Areas affected...portions of southern Montana Concerning...Severe Thunderstorm Watch 514... Valid 260134Z - 260300Z The severe weather threat for Severe Thunderstorm Watch 514 continues. SUMMARY...A few severe gusts remain possible through the evening hours. DISCUSSION...Thunderstorms have shown a slight decreasing trend in overall coverage and intensity over the past hour. Nonetheless, a few intense convective cells remain in progress, particularly over Stillwater County, MT. Surface temperatures range from 90-100 F ahead of the ongoing storms, suggesting that a well-mixed boundary layer remains in place to support a few more potentially severe gusts with the stronger storm cores. However, the severe threat should gradually subside in a few hours with the onset of nocturnal cooling. ..Squitieri.. 07/26/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...BYZ... LAT...LON 45150798 45160868 45340891 45570925 45700940 45810945 45950948 46140945 46620798 46750707 46540648 46140635 45640661 45270731 45150798 MOST PROBABLE PEAK WIND GUST...65-80 MPH Read more

MD 1736 CONCERNING SEVERE POTENTIAL...WATCH LIKELY FOR SOUTHWEST/SOUTH-CENTRAL MINNESOTA...NORTHWEST/NORTH-CENTRAL IOWA
Mesoscale Discussion 1736 NWS Storm Prediction Center Norman OK 0745 PM CDT Sat Jul 25 2026 Areas affected...Southwest/South-Central Minnesota...Northwest/North-Central Iowa Concerning...Severe potential...Watch likely Valid 260045Z - 260245Z Probability of Watch Issuance...95 percent SUMMARY...Threat for severe gusts up to 90 mph and large hail around 1 inch in diameter will persist across southwest/south-central Minnesota and northwest/north-central Iowa this evening. A Severe Thunderstorm Watch will be issued downstream to cover these convective hazards. DISCUSSION...Ongoing convective cluster continues to progress eastward across southeast South Dakota at around 35 kt. This speed has been fairly stead over the past hour or so, suggesting the line has not intensified. Even so, several severe gusts have been measured, including 70 mph in Douglas County. A recent increase in echo tops near the center of the line suggests some additional strengthening may be underway. Given the ample low-level moisture downstream (i.e. dewpoints in the upper 70s/low 80s) and extreme buoyancy (i.e. MLCAPE over 3500 J/kg) this strengthening would likely continue, with an attendant threat for severe wind gusts across southwest/south-central Minnesota and northwest/north-central Iowa. Isolated instances of hail are possible as well. A Severe Thunderstorm Watch will be issued downstream to cover these convective hazards. ..Mosier/Hart.. 07/26/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MPX...DMX...FSD...ABR... LAT...LON 44519654 44859537 44849450 44419352 43629348 42919382 42619444 42619526 42769637 43589676 44519654 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH MOST PROBABLE PEAK WIND GUST...75-90 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0800 PM CDT Sat Jul 25 2026 Valid 260100Z - 261200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FOR EASTERN SD...SOUTHWEST MN...NORTHERN IA... ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PARTS OF CENTRAL/EASTERN MT... ...SUMMARY... Severe gusts (potentially greater than 75 mph) remain possible this evening from eastern South Dakota into northern Iowa and southwest Minnesota. Isolated to widely scattered severe gusts also remain possible across parts of Montana. ...SD into southern MN/northern IA/far northeast NE... A loosely organized storm cluster is moving across eastern SD this evening. Additional intensification remains possible this evening, as this cluster encounters extreme downstream buoyancy, with MLCAPE of 4000-5000 J/kg within a very moist (dewpoints around 80 F) environment. The ongoing cluster has produced measured gusts of 60-80 mph, so any notable intensification could lead to an increase in potential for gusts in the 75-90 mph range. Isolated hail and perhaps a tornado also remain possible through dusk with this cluster. Increasing CINH with time and eastward extent should eventually result in a weakening trend later tonight, though an organized severe threat could eventually approach parts of southeast MN/northeast IA into northwest IL overnight. Farther northwest, a separate storm cluster is moving across north-central SD, within a similarly favorable environment. In the short term, this cluster may continue to move east-southeastward along a surface boundary with a continued severe-wind threat. Eventually, weakening buoyancy in the wake of the southeast SD cluster will tend to result in a weakening trend with this cluster. ...Central/eastern Montana... Strong to locally severe storms may persist through dusk across parts of central/eastern MT, within a well-mixed environment that is favorable for severe-wind potential. Increasing CINH will result in an eventual weakening trend later tonight, though remnant outflows may still produce strong to locally severe gusts as storms diminish. ...Southern AZ... Widely scattered storms and increasing outflow may continue to support strong to localized severe gusts within a very hot and well-mixed environment across parts of southern AZ. Weak deep-layer flow/shear should keep any remaining threat generally disorganized. ..Dean.. 07/26/2026 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0800 PM CDT Sat Jul 25 2026 Valid 260100Z - 261200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FOR EASTERN SD...SOUTHWEST MN...NORTHERN IA... ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PARTS OF CENTRAL/EASTERN MT... ...SUMMARY... Severe gusts (potentially greater than 75 mph) remain possible this evening from eastern South Dakota into northern Iowa and southwest Minnesota. Isolated to widely scattered severe gusts also remain possible across parts of Montana. ...SD into southern MN/northern IA/far northeast NE... A loosely organized storm cluster is moving across eastern SD this evening. Additional intensification remains possible this evening, as this cluster encounters extreme downstream buoyancy, with MLCAPE of 4000-5000 J/kg within a very moist (dewpoints around 80 F) environment. The ongoing cluster has produced measured gusts of 60-80 mph, so any notable intensification could lead to an increase in potential for gusts in the 75-90 mph range. Isolated hail and perhaps a tornado also remain possible through dusk with this cluster. Increasing CINH with time and eastward extent should eventually result in a weakening trend later tonight, though an organized severe threat could eventually approach parts of southeast MN/northeast IA into northwest IL overnight. Farther northwest, a separate storm cluster is moving across north-central SD, within a similarly favorable environment. In the short term, this cluster may continue to move east-southeastward along a surface boundary with a continued severe-wind threat. Eventually, weakening buoyancy in the wake of the southeast SD cluster will tend to result in a weakening trend with this cluster. ...Central/eastern Montana... Strong to locally severe storms may persist through dusk across parts of central/eastern MT, within a well-mixed environment that is favorable for severe-wind potential. Increasing CINH will result in an eventual weakening trend later tonight, though remnant outflows may still produce strong to locally severe gusts as storms diminish. ...Southern AZ... Widely scattered storms and increasing outflow may continue to support strong to localized severe gusts within a very hot and well-mixed environment across parts of southern AZ. Weak deep-layer flow/shear should keep any remaining threat generally disorganized. ..Dean.. 07/26/2026 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0800 PM CDT Sat Jul 25 2026 Valid 260100Z - 261200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FOR EASTERN SD...SOUTHWEST MN...NORTHERN IA... ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PARTS OF CENTRAL/EASTERN MT... ...SUMMARY... Severe gusts (potentially greater than 75 mph) remain possible this evening from eastern South Dakota into northern Iowa and southwest Minnesota. Isolated to widely scattered severe gusts also remain possible across parts of Montana. ...SD into southern MN/northern IA/far northeast NE... A loosely organized storm cluster is moving across eastern SD this evening. Additional intensification remains possible this evening, as this cluster encounters extreme downstream buoyancy, with MLCAPE of 4000-5000 J/kg within a very moist (dewpoints around 80 F) environment. The ongoing cluster has produced measured gusts of 60-80 mph, so any notable intensification could lead to an increase in potential for gusts in the 75-90 mph range. Isolated hail and perhaps a tornado also remain possible through dusk with this cluster. Increasing CINH with time and eastward extent should eventually result in a weakening trend later tonight, though an organized severe threat could eventually approach parts of southeast MN/northeast IA into northwest IL overnight. Farther northwest, a separate storm cluster is moving across north-central SD, within a similarly favorable environment. In the short term, this cluster may continue to move east-southeastward along a surface boundary with a continued severe-wind threat. Eventually, weakening buoyancy in the wake of the southeast SD cluster will tend to result in a weakening trend with this cluster. ...Central/eastern Montana... Strong to locally severe storms may persist through dusk across parts of central/eastern MT, within a well-mixed environment that is favorable for severe-wind potential. Increasing CINH will result in an eventual weakening trend later tonight, though remnant outflows may still produce strong to locally severe gusts as storms diminish. ...Southern AZ... Widely scattered storms and increasing outflow may continue to support strong to localized severe gusts within a very hot and well-mixed environment across parts of southern AZ. Weak deep-layer flow/shear should keep any remaining threat generally disorganized. ..Dean.. 07/26/2026 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0800 PM CDT Sat Jul 25 2026 Valid 260100Z - 261200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FOR EASTERN SD...SOUTHWEST MN...NORTHERN IA... ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PARTS OF CENTRAL/EASTERN MT... ...SUMMARY... Severe gusts (potentially greater than 75 mph) remain possible this evening from eastern South Dakota into northern Iowa and southwest Minnesota. Isolated to widely scattered severe gusts also remain possible across parts of Montana. ...SD into southern MN/northern IA/far northeast NE... A loosely organized storm cluster is moving across eastern SD this evening. Additional intensification remains possible this evening, as this cluster encounters extreme downstream buoyancy, with MLCAPE of 4000-5000 J/kg within a very moist (dewpoints around 80 F) environment. The ongoing cluster has produced measured gusts of 60-80 mph, so any notable intensification could lead to an increase in potential for gusts in the 75-90 mph range. Isolated hail and perhaps a tornado also remain possible through dusk with this cluster. Increasing CINH with time and eastward extent should eventually result in a weakening trend later tonight, though an organized severe threat could eventually approach parts of southeast MN/northeast IA into northwest IL overnight. Farther northwest, a separate storm cluster is moving across north-central SD, within a similarly favorable environment. In the short term, this cluster may continue to move east-southeastward along a surface boundary with a continued severe-wind threat. Eventually, weakening buoyancy in the wake of the southeast SD cluster will tend to result in a weakening trend with this cluster. ...Central/eastern Montana... Strong to locally severe storms may persist through dusk across parts of central/eastern MT, within a well-mixed environment that is favorable for severe-wind potential. Increasing CINH will result in an eventual weakening trend later tonight, though remnant outflows may still produce strong to locally severe gusts as storms diminish. ...Southern AZ... Widely scattered storms and increasing outflow may continue to support strong to localized severe gusts within a very hot and well-mixed environment across parts of southern AZ. Weak deep-layer flow/shear should keep any remaining threat generally disorganized. ..Dean.. 07/26/2026 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0800 PM CDT Sat Jul 25 2026 Valid 260100Z - 261200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FOR EASTERN SD...SOUTHWEST MN...NORTHERN IA... ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PARTS OF CENTRAL/EASTERN MT... ...SUMMARY... Severe gusts (potentially greater than 75 mph) remain possible this evening from eastern South Dakota into northern Iowa and southwest Minnesota. Isolated to widely scattered severe gusts also remain possible across parts of Montana. ...SD into southern MN/northern IA/far northeast NE... A loosely organized storm cluster is moving across eastern SD this evening. Additional intensification remains possible this evening, as this cluster encounters extreme downstream buoyancy, with MLCAPE of 4000-5000 J/kg within a very moist (dewpoints around 80 F) environment. The ongoing cluster has produced measured gusts of 60-80 mph, so any notable intensification could lead to an increase in potential for gusts in the 75-90 mph range. Isolated hail and perhaps a tornado also remain possible through dusk with this cluster. Increasing CINH with time and eastward extent should eventually result in a weakening trend later tonight, though an organized severe threat could eventually approach parts of southeast MN/northeast IA into northwest IL overnight. Farther northwest, a separate storm cluster is moving across north-central SD, within a similarly favorable environment. In the short term, this cluster may continue to move east-southeastward along a surface boundary with a continued severe-wind threat. Eventually, weakening buoyancy in the wake of the southeast SD cluster will tend to result in a weakening trend with this cluster. ...Central/eastern Montana... Strong to locally severe storms may persist through dusk across parts of central/eastern MT, within a well-mixed environment that is favorable for severe-wind potential. Increasing CINH will result in an eventual weakening trend later tonight, though remnant outflows may still produce strong to locally severe gusts as storms diminish. ...Southern AZ... Widely scattered storms and increasing outflow may continue to support strong to localized severe gusts within a very hot and well-mixed environment across parts of southern AZ. Weak deep-layer flow/shear should keep any remaining threat generally disorganized. ..Dean.. 07/26/2026 Read more

WW 0515 Status Updates
STATUS FOR WATCH 0515 HAS NOT BEEN ISSUED YET Read more

WW 0515 Status Updates
STATUS FOR WATCH 0515 HAS NOT BEEN ISSUED YET Read more

WW 0515 Status Updates
STATUS FOR WATCH 0515 HAS NOT BEEN ISSUED YET Read more

MD 1733 CONCERNING SEVERE THUNDERSTORM WATCH 513... FOR EASTERN SOUTH DAKOTA
Mesoscale Discussion 1733 NWS Storm Prediction Center Norman OK 0602 PM CDT Sat Jul 25 2026 Areas affected...Eastern South Dakota Concerning...Severe Thunderstorm Watch 513... Valid 252302Z - 260100Z The severe weather threat for Severe Thunderstorm Watch 513 continues. SUMMARY...Destructive wind gusts from 75 to 90 mph and large hail are possible as the convective cluster across central South Dakota continues to intensify and grow upscale. DISCUSSION...A convective cluster continues to evolve across central South Dakota. This cluster is just now beginning to interact with a reservoir of ample low-level moisture in place across eastern/southeastern South Dakota. Recent surface analysis reveals numerous observations with dewpoints in the mid to upper 70s, with a few in far southeast South Dakota and far northeast Nebraska reporting dewpoints in the low 80s. This copious low-level moisture, in tandem with temperatures in the upper 90s/low 100s, is supporting extreme buoyancy, with mesoanalysis estimating over 3000 J/kg MLCAPE. General expectation is for this portion of the cluster to intensify as it continues eastward over the next several hours, potentially evolving into a significant wind-producing MCS over the next few hours. Primary hazard will be very strong, destructive wind gusts from 75 to 90 mph, with the strongest gusts more likely after 00Z. A discrete supercell continues to progress northeastward within the northern portion of the cluster over Hyde County South Dakota. Given its mature and organized character, expectation is for this supercell to persist for at least the next hour, with its motion potentially becoming more east-northeastward to eastward as it grows upscale. Large hail up to 2" in diameter and strong gusts over 75 mph are possible with this cell. ..Mosier.. 07/25/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...FSD...ABR...UNR... LAT...LON 43829976 44919964 45229884 44939762 43729703 43079771 43180002 43829976 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH MOST PROBABLE PEAK WIND GUST...75-90 MPH MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN Read more

MD 1734 CONCERNING SEVERE THUNDERSTORM WATCH 514... FOR PORTIONS OF CENTRAL INTO SOUTHERN MONTANA
Mesoscale Discussion 1734 NWS Storm Prediction Center Norman OK 0613 PM CDT Sat Jul 25 2026 Areas affected...portions of central into southern Montana Concerning...Severe Thunderstorm Watch 514... Valid 252313Z - 260045Z The severe weather threat for Severe Thunderstorm Watch 514 continues. SUMMARY...Severe gusts remain a concern through the evening hours with the stronger, longer-lived storms. A gust or two could exceed 75 mph. DISCUSSION...Pulse cellular and multicellular storms continue to track across central and southern MT, amid a modestly unstable and sheared airmass. Surface temperatures remain above 100 F, amid mid 40s F dewpoints ahead of the storms, yielding 50+ F surface T/Td spreads. DCAPE exceeds 2000 J/kg in some locales (per 23Z mesoanalysis). As such, enough evaporative cooling with the deeper storm cores will support downbursts easily capable of producing 60+ mph gusts, a couple of which may also exceed 75 mph. ..Squitieri/Hart.. 07/25/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...BYZ...GGW...TFX... LAT...LON 45551219 46821085 47560953 47870787 47810664 47470611 46720581 46000583 45590628 45300764 45090970 45111141 45551219 MOST PROBABLE PEAK WIND GUST...65-80 MPH Read more

MD 1735 CONCERNING SEVERE THUNDERSTORM WATCH 513... FOR NORTH-CENTRAL SOUTH DAKOTA
Mesoscale Discussion 1735 NWS Storm Prediction Center Norman OK 0625 PM CDT Sat Jul 25 2026 Areas affected...North-Central South Dakota Concerning...Severe Thunderstorm Watch 513... Valid 252325Z - 260100Z The severe weather threat for Severe Thunderstorm Watch 513 continues. SUMMARY...Severe wind gusts from 65 to 80 mph and large to very large hail are possible for the next few hours across north-central South Dakota. DISCUSSION...Recent surface analysis places a low over central western South Dakota (about 30-40 miles east of RAP), with a subtle moisture gradient resulting in low-level moisture convergence to the north and northeast of this low. This convergence, aided by weak warm-air advection, has resulted in a band of thunderstorms from northwest into central South Dakota. The downstream airmass is characterized by abundant low-level moisture, very warm temperatures, and strong to very strong buoyancy. Moderate westerly flow aloft atop low-level southeasterlies results in strong vertical shear as well. This activity is expected to persist for the next few hours, although an outflow boundary from the cluster over south-central South Dakota could impact the downstream thermodynamics. A trend towards a more easterly motion is anticipated as well, as storms grow upscale and become better aligned with the deep shear and instability. Severe wind gusts from 65 to 80 mph are the primary hazard, although large to very large hail is possible as well, particularly if any storm mergers occur. ..Mosier.. 07/25/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...ABR...UNR... LAT...LON 44490102 44920166 45460155 45880070 45869885 44699926 44440009 44490102 MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN Read more

WW 0513 Status Updates
STATUS FOR WATCH 0513 HAS NOT BEEN ISSUED YET Read more

WW 0513 Status Updates
STATUS FOR WATCH 0513 HAS NOT BEEN ISSUED YET Read more

WW 0513 Status Updates
STATUS FOR WATCH 0513 HAS NOT BEEN ISSUED YET Read more

WW 0513 Status Updates
STATUS FOR WATCH 0513 HAS NOT BEEN ISSUED YET Read more

WW 513 SEVERE TSTM SD 252035Z - 260400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 513 NWS Storm Prediction Center Norman OK 335 PM CDT Sat Jul 25 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Central and Eastern South Dakota * Effective this Saturday afternoon and evening from 335 PM until 1100 PM CDT. ...THIS IS A PARTICULARLY DANGEROUS SITUATION... * Primary threats include... Widespread damaging winds and scattered significant gusts to 100 mph likely Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Thunderstorms are forecast to intensify this afternoon and become severe with an initial threat for isolated large hail and severe gusts. As additional storms form and cold pools coalesce, a linear cluster of severe thunderstorms is expected to organize in central and eastern South Dakota by the early evening. A severe-wind squall line with widespread severe gusts is forecast and peak gusts 85 to 100 mph are likely. The severe thunderstorm watch area is approximately along and 75 statute miles north and south of a line from 20 miles west northwest of Philip SD to 20 miles southeast of Brookings SD. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU3). 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 85 knots. A few cumulonimbi with maximum tops to 600. Mean storm motion vector 28040. ...Smith Read more