Storm Prediction Center

No watches are valid as of Wed Jul 22 10:05:02 UTC 2026.

No Mesoscale Discussions are in effect as of Wed Jul 22 10:05:02 UTC 2026.

Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0226 AM CDT Wed Jul 22 2026 Valid 251200Z - 301200Z ...DISCUSSION... ...Upper Midwest to Ohio Valley and Mid-Atlantic... An upper ridge centered over the High Plains will persist through the middle of next week. Meanwhile, upper troughing will be maintained over the eastern U.S. Periods of enhanced northwesterly flow aloft are expected across parts of the Upper Midwest/Great Lakes into parts of the Ohio Valley and Mid-Atlantic on the eastern periphery of the Plains upper ridge. Several shortwave impulses are forecast to develop southeast from Canada within this northwest flow regime. This could support daily severe thunderstorm chances from the Upper Midwest into the Ohio Valley, and possibly the Mid-Atlantic. However, the timing of these features is uncertain, and midlevel capping could limit the spatial extent of severe potential. It is likely that portions of the Upper Midwest into the Ohio Valley will need severe probabilities in later outlooks, particularly for Day 4-6/Sat-Mon, and possibly the mid-Atlantic by Day 7/Tue. However, confidence in where this risk will develop each day is too low for 15 percent delineation at this time. Read more

SPC 0730Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0106 AM CDT Wed Jul 22 2026 Valid 241200Z - 251200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF EASTERN NORTH DAKOTA AND NORTHERN MINNESOTA... ...SUMMARY... Isolated severe thunderstorms are possible on Friday across portions of eastern North Dakota into northern Minnesota. ...North Dakota/Minnesota... An upper shortwave trough will develop southeast from the Canadian Prairies toward the Great Lakes on Friday. This will result in some enhancement of northwesterly flow aloft across the region. At the surface, low pressure will move from northern Manitoba into Quebec and a trailing cold front will drop southeast across ND and northern MN. Southerly low-level flow ahead of the front will transport low to mid 60s F dewpoints across parts of the eastern Dakotas and MN. A plume of steepening midlevel lapse rates will overspread the region, supporting 1000-2000 J/kg MLCAPE. Vertically veering wind profiles, with 30-50 kt northwesterly flow between 700-500 mb will support effective shear magnitudes greater than 40 kt. Isolated thunderstorms are expected to develop by late afternoon/early evening near the surface front. Wind profiles suggest supercells will be possible. Forecast soundings indicate some areas may maintain weak to moderate capping, which may preclude surface-based convection. However, elevated storms will pose a risk for isolated large hail. If thunderstorms are surface-based, a risk for strong gusts and tornado would also be possible. ..Leitman.. 07/22/2026 Read more

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1220 AM CDT Wed Jul 22 2026 Valid 231200Z - 241200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorm potential appears low on Thursday. However, locally gusty winds could occur with thunderstorms across the central High Plains. ...Discussion... In the mean, an amplified upper ridge will persist across he West, with the subtropical high over TX shifting west toward the Four Corners vicinity through the period. An upper shortwave trough embedded within the eastern periphery of the upper ridge will migrate southeast from the central Rockies to the Mid/Lower MO Valley through early Friday morning. Southerly low-level flow across the Plains will result in a belt of modest boundary-layer moisture across the central High Plains. Steep midlevel lapse rates will foster weak instability across parts of WY/CO into western KS. Scattered thunderstorms will develop during the afternoon and spread east/southeast across the central High Plains. A deeply mixed boundary layer will support isolated strong outflow gusts. However, weak vertical shear and limited instability will preclude severe probabilities at this time. ..Leitman.. 07/22/2026 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1250 AM CDT Wed Jul 22 2026 Valid 221200Z - 231200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE SOUTHERN MID-ATLANTIC... ...SUMMARY... Isolated to scattered storms are possible in the southern Mid-Atlantic into New England this afternoon/evening. Damaging winds are the primary concern. Isolated strong to severe wind gusts are also possible in the central High Plains and central Oregon. ...Synopsis... A upper trough will persist in the Northeast CONUS with a ridge amplifying into the Northwest. An offshore upper low in the Northwest will eject shortwave perturbations into Oregon/Washington. At the surface, a cold front will move through New England. The front will slow in the Mid-Atlantic during the afternoon before moving southeast during the overnight. ...Mid-Atlantic into parts of Carolinas... The cold front in this region is expected to slow/stall near the Blue Ridge into eastern Maryland. Models suggest clouds/precipitation will be likely in the vicinity of the Virginia/North Carolina border. Mid-level forcing for ascent will be weak at best and subtle mid-level warming is expected from far southern Virginia into the Carolinas. Moderate to strong mid-level winds will be in place with the strongest flow in Virginia/Maryland. It is not clear how convection will evolve during the day/afternoon. Storms could potentially continue from the morning into the afternoon over portions of the region. There also is potential for storms to develop along the cold front where there could potentially be greater surface heating. In the Carolinas, the lack of ascent and cloud cover concerns limit confidence in how many storms and how strong they will become. Greater confidence in storm coverage exists in Virginia into the DelMarVa where the Slight Risk has been maintained. The kinematic environment will support occasionally organized storms capable of damaging winds and perhaps a tornado or two. ...New England... A strong mid-level jet will be favorably timed during the afternoon, particularly for New Hampshire/Maine. As the cold front moves through, scattered storms appear probable. Effective shear of 30-40 kt and strong upper-level winds will promote supercell structures. The shear vector will have a large component parallel to the north-south cold front so it is not clear how long discrete structures can be maintained. Isolated damaging winds, marginally severe hail, and perhaps a tornado would be possible. Some consideration was given to a higher severe probabilities, but the region will initially be in the wake of a shortwave trough and thermodynamic profiles exhibit characteristics (e.g., mid-level inversion, lowered equilibrium level) that limits confidence in how many severe-caliber storms will exist. Farther south and west, there is less signal for convective development along the cold front. A Marginal risk has been maintained this outlook cycle. Some risk for damaging winds would exist if an isolated storm can develop along the front. ...Central High Plains... Southeasterly surface winds will combine with increasingly westerly/northwesterly flow aloft to promote modest deep-layer shear (around 30 kt 0-6 km) during the afternoon/evening. The development of a weak lee low and low-level moisture moving northwest around the Midwest anticyclone will aid in storm development within the region. Temperature-dewpoint spreads at the surface will allow for efficient outflow production. A strengthening southeasterly low-level jet in western Kansas may also help maintain convection farther east during the evening. Severe wind gusts are possible with this activity. ...Oregon... An upper-low will be positioned off the Northwest Coast. Subtle ascent will help to initiate storms in parts of central Oregon during the afternoon. Models are in strong agreement that scattered storms will move northward into at least early evening. Strong heating will lead to large temperature-dewpoint spreads at the surface. Inverted-v thermodynamic profiles will promote a risk for strong to severe wind gusts despite limited buoyancy and shear. ..Wendt/Weinman.. 07/22/2026 Read more

SPC 0730Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0126 AM CDT Tue Jul 21 2026 Valid 231200Z - 241200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorm potential appears low on Thursday. However, locally gusty winds could occur with thunderstorms across the central High Plains into the northern Rockies. ...Central High Plains... Scattered thunderstorms are expected to develop over higher terrain in the central Rockies during the afternoon. Easterly low-level flow across the adjacent High Plains will transport modest boundary layer moisture westward across western KS and eastern CO. Meanwhile, a weak surface boundary may develop south across the central High Plains as convection moves off higher terrain into the High Plains. Forecast soundings indicate generally weak midlevel lapse rates, but steep low-level lapse rates within modest instability (MLCAPE up to 1000 J/kg). This could support gusty outflow winds with storms across the Plains. However, effective shear values in the 20-25 kt range and very weak flow below 500 mb suggests organized severe convection is unlikely amid the weakly unstable airmass. ...Northern Rockies... Some enhancement to upper flow is forecast as a shortwave upper trough moves across Alberta and Saskatchewan, and an upper low persists off the Pacific Northwest coast. Forecast soundings show a deeply-mixed boundary layer with steep 0-3 km lapse rates. Steep midlevel lapse rates will be sufficient for weak destabilization, and isolated thunderstorms are expected during the afternoon/evening. Given weak vertical shear and limited instability, organized severe potential is low, though gusty outflow winds could occur. ..Leitman.. 07/21/2026 Read more

No Mesoscale Discussions are in effect as of Tue Jul 21 06:28:02 UTC 2026.

No watches are valid as of Tue Jul 21 06:28:02 UTC 2026.

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1215 AM CDT Tue Jul 21 2026 Valid 221200Z - 231200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE SOUTHERN MID-ATLANTIC... ...SUMMARY... Isolated severe thunderstorms will pose a risk for damaging wind gusts across parts of the southern Mid-Atlantic. Additional thunderstorms are expected northward across New England, some of which could produce locally strong wind gusts. ...Mid-Atlantic into New England... Several shortwave impulses are forecast to move through large-scale upper troughing across the Northeast on Wednesday. Relatively strong deep-layer winds for mid/late July are forecast, characterized by 500 mb southerly flow around 45-60 kt, 35-55 kt at 700 mb, and 25-35 kt at 850 mb. At the surface, low pressure will lift northeast across Quebec, with a surface trough extending southward into the Mid-Atlantic. A cold front is forecast to be located from eastern NY to the central Appalachians and the TN Valley Wednesday morning. The northern extent of the front will be rather progressive as it moves across New England and the northern Mid-Atlantic through the afternoon and evening. The southern extent of the front will more slowly sag south/southeast across VA/NC. Ahead of the front, southerly low-level flow will maintain a seasonally moist airmass beneath the moderately strong deep-layer wind fields. While the boundary layer will be moist, strong heating will be limited due to cloud cover and poor lapse rates. This will limit instability, especially with northward extent into New England. Nevertheless, sufficient instability coupled with the stronger deep-layer flow will support organized clusters capable of wind damage. The greatest risk will be focused across the southern Mid-Atlantic where instability will be greatest (1000-1500 J/kg MLCAPE). ..Leitman.. 07/21/2026 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1259 AM CDT Tue Jul 21 2026 Valid 211200Z - 221200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE UPPER OHIO VALLEY INTO THE MID-ATLANTIC... ...SUMMARY... Numerous severe thunderstorms are expected across a broad region from the Ohio Valley into the Mid-Atlantic and Northeast today. All severe hazards are possible, but swaths of damaging wind gusts should be the primary severe risk during the afternoon and early evening hours. ...Ohio Valley into the Mid-Atlantic... A broad area of 40-50-kt midlevel west-southwesterly flow will overspread the OH Valley into the Mid-Atlantic as a large-scale trough shifts across the northeastern CONUS. Scattered to numerous thunderstorms are expected to develop ahead of an eastward-moving cold front across the OH Valley and along a pre-frontal trough over the Mid-Atlantic. In the base of the trough, a convectively augmented midlevel impulse moving from the lower OH Valley into the Mid-Atlantic may also serve as a focus for convective development. Diurnal heating within cloud breaks, combined with upper 60s to lower 70s dewpoints, will support moderate surface-based instability across the broad pre-frontal warm sector. The most favorable overlap of this instability and 40-50 kt of effective shear is expected from the lower OH Valley into the Mid-Atlantic, where a mix of organized clusters and supercells should evolve and spread eastward through the day. Swaths of damaging wind gusts will be the primary severe hazard, though severe hail will also be possible with any sustained supercells. Additionally, a gradually strengthening and expanding 30-kt low-level jet will contribute to clockwise-curved low-level hodographs, and a few tornadoes may occur. ...Mid-South into the Tennessee Valley... Greater instability is expected southwestward into portions of the Mid-South and TN Valley, although somewhat weaker deep-layer shear (around 30-40 kt of effective shear) may temper storm organization compared to ares farther northeast. Nevertheless, widely scattered thunderstorms capable of organizing into multicell clusters and occasional supercell structures will pose a risk of damaging wind gusts and isolated severe hail ahead of the cold front during the afternoon and early evening hours. ...Northeast... Increasing midlevel height falls/forcing for ascent preceding the upper trough will support scattered thunderstorm development near an effective warm front moving northward across portions of the Northeast. While poor midlevel lapse rates and weaker instability should limit the overall severe risk compared to areas farther south, around 40 kt of effective shear will still support organized storm structures. Damaging wind gusts will be the primary concern, though isolated severe hail and a tornado or two will also be possible. ..Weinman/Jirak.. 07/21/2026 Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1250 AM CDT Tue Jul 21 2026 Valid 221200Z - 231200Z ...Synopsis... Upper-level troughing will remain in place across the eastern U.S. as a southward progressing cold front promotes widespread chances of rainfall along the Eastern Seaboard on Day 2/Wednesday. Meanwhile, the remnants of Post-Tropical Cyclone Elida will continue to translate northward along the western periphery of a large-scale ridge across the western CONUS. As high pressure shifts towards the Four Corners, additional monsoonal moisture will advect into the Pacific Northwest. Despite being less than 48 hours from the forecast period, model data (including high-resolution guidance) exhibits prominent differences in the amplitude of the upper ridge; thus, disparity in the strength and direction of upper/mid-level flow. While a mix of wet/dry thunderstorms are still expected across the IsoDryT area, a slightly more eastward progression of the Pacific upper low could result in expasive thunderstorm coverage. Forecast PWAT values do approach 0.9-1.25", but 20-30 kt storm motions should inhibit precipitation efficiency, resulting in greater potential for lightning ignitions. Given very receptive fuels and fire activity in the area, a subsequent outlook upgrade to a Scattered Dry Thunderstorm area may be warranted if the wetting rain footprint remains relatively smaller to thunderstorm coverage. ..Elizalde-Garcia.. 07/21/2026 ...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 1245 AM CDT Tue Jul 21 2026 Valid 211200Z - 221200Z ...Synopsis... ...Northern California and west/central Oregon... Along the northwestern periphery of a large-scale ridge encompassing much of the central and western CONUS, ample mid-level moisture will be in place atop a warm and dry airmass across parts of northern CA into OR. Forecast soundings depict inverted-V profiles with weak (albeit sufficient) buoyancy for high-based thunderstorms across the area during the afternoon and evening hours. Cloud cover, smoke, and warmer temperatures aloft will help limit thunderstorm development/coverage across the IsoDryT area, but isolated thunderstorms remain possible. While 0.8 to 1.2 inch PWATs may promote a mix of wet/dry storms, relatively fast storm motions and the dry boundary layer should limit precipitation efficiency. As a result, isolated lightning-induced ignitions will be possible within a very dry fuelscape. ...South Carolina... Progressive upper-level troughing will continue across the northeastern U.S. as a closed low traverses northern Ontario, sending a cold front through the Ohio Valley. Enhanced 850 mb southwesterly flow ahead of the front will encourage gusty surface winds amid minimum RH values of 30-40% in portions of South Carolina. Locally elevated fire weather conditions are likely, as ERCs generally range from the 80th-95th percentile across this area. ..Elizalde-Garcia.. 07/21/2026 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

MD 1681 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR SOUTHWEST WISCONSIN...FAR SOUTHEAST MINNESOTA...AND NORTHEAST IOWA
Mesoscale Discussion 1681 NWS Storm Prediction Center Norman OK 0720 PM CDT Mon Jul 20 2026 Areas affected...southwest Wisconsin...far southeast Minnesota...and northeast Iowa Concerning...Severe potential...Watch unlikely Valid 210020Z - 210215Z Probability of Watch Issuance...20 percent SUMMARY...Storm development south of Tornado Watch 501 is appearing less likely. Based on current observations, an additional watch is not expected. DISCUSSION...Over the past hour, visible satellite and radar data have shown several attempts at storm initiation along a weakly convergent surface front. Short parcel residence time within the frontal zone coupled with a warm nose in the 700-800 mb layer, per 00Z MPX sounding, appears to limiting storm development. In addition, convectively processed air spreading north into the area from ongoing storms across IA is resulting in an increasingly narrow warm sector ahead of the front. Given these observations and the absence of storms in latest CAM guidance, an additional watch is not currently expected to the south of Tornado Watch 501. ..Mead.. 07/21/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...GRB...MKX...DVN...ARX...MPX... LAT...LON 43699265 44399165 44619095 44369048 43878951 43398895 42488974 42889202 43699265 MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN Read more

MD 1682 CONCERNING TORNADO WATCH 501... FOR NORTHEAST WISCONSIN INTO THE CENTRAL U.P. OF MICHIGAN
Mesoscale Discussion 1682 NWS Storm Prediction Center Norman OK 0804 PM CDT Mon Jul 20 2026 Areas affected...northeast Wisconsin into the central U.P. of Michigan Concerning...Tornado Watch 501... Valid 210104Z - 210230Z The severe weather threat for Tornado Watch 501 continues. SUMMARY...The threat for a couple tornadoes and large hail continues across the watch area. DISCUSSION...Widely scattered to scattered thunderstorms are ongoing as of 01Z with recent funnel cloud reports with discrete storms over Marathon County, WI. The 00Z Green Bay soundings sampled a steep lapse rate and moderately unstable air mass with MLCAPE in excess of 1500 J/kg. However, some degree of capping was observed in the 800-700 mb layer, which may be inhibiting storms from fully realizing the available instability. Latest objective fields suggest that 0-3 km CAPE may be larger in the vicinity of the front (and recent funnel cloud reports), where low-level parcel accelerations may be stronger. Per the Green Bay observed sounding and current VWP, vertical shear remains quite favorable for supercell modes with an attendant large hail and tornado risk. Despite modestly strong low-level storm-relative inflow, the spatial dimensions of the current storms are small, suggesting that perhaps the aforementioned capping may be diluting parcel buoyancy. As such, the extent of the tornado threat remains uncertain. Large hail will also remain possible with the strongest storms. ..Mead.. 07/21/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MQT...GRB... LAT...LON 44429019 45049000 45598912 45968772 46108722 46228632 45738643 45098712 44328763 44328846 44429019 MOST PROBABLE PEAK TORNADO INTENSITY...100-125 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN Read more

MD 1683 CONCERNING SEVERE THUNDERSTORM WATCH 504... FOR WEST-CENTRAL ILLINOIS
Mesoscale Discussion 1683 NWS Storm Prediction Center Norman OK 0830 PM CDT Mon Jul 20 2026 Areas affected...west-central Illinois Concerning...Severe Thunderstorm Watch 504... Valid 210130Z - 210300Z The severe weather threat for Severe Thunderstorm Watch 504 continues. SUMMARY...The potential for locally damaging wind gusts will continue and may develop south of the watch area. Convective trends are being monitored for a possible downstream watch. DISCUSSION...As of 0115Z, a small cluster of thunderstorms was centered over Hancock and McDonough Counties, IL, with a system motion of 325/25 kt. While distant from the radar, base velocity data from KDVN show 60+ kt outbound values at ~7 kft above the ground. Latest objective fields indicate poor low-level lapse rates and increasing convective inhibition, which are likely limiting the potential for the stronger winds aloft from reaching the ground. These factors are expected to limit the potential for a more robust damaging wind threat; however, isolated wind gusts of 60-65 mph will remain possible for the next several hours. ..Mead.. 07/21/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...ILX...LSX...DVN... LAT...LON 39829105 40139147 40589147 40769081 40069032 39779059 39829105 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN Read more

WW 0505 Status Updates
STATUS REPORT ON WW 505 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..MEAD..07/21/26 ATTN...WFO...APX...GRR... STATUS REPORT FOR WS 505 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MIC009-019-029-031-035-039-047-055-079-085-089-097-101-105-113- 119-133-137-141-165-210240- MI . MICHIGAN COUNTIES INCLUDED ARE ANTRIM BENZIE CHARLEVOIX CHEBOYGAN CLARE CRAWFORD EMMET GRAND TRAVERSE KALKASKA LAKE LEELANAU MACKINAC MANISTEE MASON MISSAUKEE MONTMORENCY OSCEOLA OTSEGO PRESQUE ISLE WEXFORD LHZ345-346-347-361-LMZ323-341-342-344-345-346-362-364-366-849-868- LSZ322-210240- CW . ADJACENT COASTAL WATERS INCLUDED ARE GRAND TRAVERSE BAY SOUTH OF A LINE GRAND TRAVERSE LIGHT TO NORWOOD MI SEUL CHOIX POINT TO 5NM WEST OF MACKINAC BRIDGE Read more

WW 505 SEVERE TSTM MI LH LM LS 202350Z - 210600Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 505 NWS Storm Prediction Center Norman OK 750 PM EDT Mon Jul 20 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northern Lower Michigan Lake Huron Lake Michigan Lake Superior * Effective this Monday night and Tuesday morning from 750 PM until 200 AM EDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated very large hail events to 2 inches in diameter possible A tornado or two possible SUMMARY...Widely scattered intense storms over Upper Michigan and northern Wisconsin will track southeastward into the watch area this evening, posing a risk of damaging winds and hail. A tornado or two is possible. The severe thunderstorm watch area is approximately along and 55 statute miles east and west of a line from 15 miles southeast of Manistee MI to 40 miles north northeast of Pellston MI. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU5). 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 500...WW 501...WW 504... AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 28030. ...Hart Read more

WW 0504 Status Updates
STATUS REPORT ON WW 504 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NW BRL TO 25 W PIA TO 20 NNE SPI. ..MEAD..07/21/26 ATTN...WFO...DVN...ILX... STATUS REPORT FOR WS 504 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC017-057-067-071-095-107-109-125-129-143-167-169-179-187- 210240- IL . ILLINOIS COUNTIES INCLUDED ARE CASS FULTON HANCOCK HENDERSON KNOX LOGAN MCDONOUGH MASON MENARD PEORIA SANGAMON SCHUYLER TAZEWELL WARREN MOC045-199-210240- MO . MISSOURI COUNTIES INCLUDED ARE CLARK SCOTLAND 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 504 SEVERE TSTM IA IL MO 202240Z - 210400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 504 NWS Storm Prediction Center Norman OK 540 PM CDT Mon Jul 20 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of East Central Iowa Northwest Illinois Northeast Missouri * Effective this Monday afternoon and evening from 540 PM until 1100 PM CDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 80 mph likely Isolated very large hail events to 2 inches in diameter possible SUMMARY...A fast-moving bowing line of thunderstorms over eastern Iowa will track southeastward across the watch area this evening, with a risk of severe wind gusts and hail. The severe thunderstorm watch area is approximately along and 55 statute miles either side of a line from 45 miles north northwest of Burlington IA to 15 miles east southeast of Peoria IL. 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 500...WW 501... AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 70 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 30035. ...Hart Read more