Storm Prediction Center

WW 0209 Status Updates
STATUS REPORT ON WW 209 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 N GCK TO 30 WSW HLC TO 35 S MCK TO 30 S LBF TO 25 WSW BBW. ..JEWELL..05/17/26 ATTN...WFO...GLD...BOU...LBF...CYS... STATUS REPORT FOR WS 209 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC039-063-065-137-179-170340- KS . KANSAS COUNTIES INCLUDED ARE DECATUR GOVE GRAHAM NORTON SHERIDAN NEC063-111-145-170340- NE . NEBRASKA COUNTIES INCLUDED ARE FRONTIER LINCOLN RED WILLOW 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 0209 Status Updates
STATUS REPORT ON WW 209 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 N GCK TO 30 WSW HLC TO 35 S MCK TO 30 S LBF TO 25 WSW BBW. ..JEWELL..05/17/26 ATTN...WFO...GLD...BOU...LBF...CYS... STATUS REPORT FOR WS 209 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC039-063-065-137-179-170340- KS . KANSAS COUNTIES INCLUDED ARE DECATUR GOVE GRAHAM NORTON SHERIDAN NEC063-111-145-170340- NE . NEBRASKA COUNTIES INCLUDED ARE FRONTIER LINCOLN RED WILLOW 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 0209 Status Updates
STATUS REPORT ON WW 209 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 N GCK TO 30 WSW HLC TO 35 S MCK TO 30 S LBF TO 25 WSW BBW. ..JEWELL..05/17/26 ATTN...WFO...GLD...BOU...LBF...CYS... STATUS REPORT FOR WS 209 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC039-063-065-137-179-170340- KS . KANSAS COUNTIES INCLUDED ARE DECATUR GOVE GRAHAM NORTON SHERIDAN NEC063-111-145-170340- NE . NEBRASKA COUNTIES INCLUDED ARE FRONTIER LINCOLN RED WILLOW 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 209 SEVERE TSTM CO KS NE 162105Z - 170400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 209 NWS Storm Prediction Center Norman OK 305 PM MDT Sat May 16 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Colorado Northwest Kansas Southwest Nebraska * Effective this Saturday afternoon and evening from 305 PM until 1000 PM MDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 80 mph likely Scattered large hail and isolated very large hail events to 2 inches in diameter likely A tornado or two possible SUMMARY...Thunderstorm coverage is expected to increase across northeast Colorado this afternoon, with additional isolated storms farther east into southwest Nebraska. The Colorado storms will likely develop into a well-organized convective line by this evening, tracking east-northeastward during the evening and overnight. Large to very large hail is possible initially, with a transition to damaging gusts once the convective line develops. Significant severe gusts over 75 mph are possible. There is also a low-probability tornado risk with any more discrete storms along the southern periphery of any convective line. The severe thunderstorm watch area is approximately along and 90 statute miles east and west of a line from 75 miles northeast of Sidney NE to 35 miles south of Burlington CO. 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 208... 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 24035. ...Mosier Read more

MD 0741 CONCERNING SEVERE THUNDERSTORM WATCH 209...211... FOR NORTHWEST INTO NORTH-CENTRAL KANSAS...SOUTHWEST INTO SOUTH-CENTRAL NEBRASKA
Mesoscale Discussion 0741 NWS Storm Prediction Center Norman OK 0701 PM CDT Sat May 16 2026 Areas affected...northwest into north-central Kansas...southwest into south-central Nebraska Concerning...Severe Thunderstorm Watch 209...211... Valid 170001Z - 170200Z The severe weather threat for Severe Thunderstorm Watch 209, 211 continues. SUMMARY...A corridor of significant damaging winds appears to be developing across northwest Kansas. Gusts over 75-80 mph may occur across much of northern Kansas into southern Nebraska this evening. Wind-driven hail is possible as well. DISCUSSION...A broken line of supercells producing large hail currently extends from southwest NE across central NE and into IA near the stationary front, with most of this activity moving very slowly. Large hail and very heavy rain remains likely with this activity. To the southwest, storms moving out of eastern CO and into northwest KS have recently shown signs of increased outflow, with radar indications of 60-70 kt inbound to KGLD radar. Additional supercells have formed near Goodland KS just ahead of the developing bow as well, resulting in a chaotic mixture of storm modes. Given the steep lapse rate environment, backed/easterly low-level winds to maximize storm-relative inflow, and increasing low-level jet this evening, a damaging MCS/bow echo is anticipated to develop out of the northwest KS activity. This potential system will move across northern KS and southern NE, with widespread severe winds likely. Significant gusts over 75 mph will be possible, with isolated stronger gusts. ..Jewell.. 05/17/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...TOP...ICT...GID...LBF...DDC...GLD... LAT...LON 40190187 40520142 41009878 40989798 40659743 39539752 39259804 39099935 38980204 39740201 40190187 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH MOST PROBABLE PEAK WIND GUST...75-90 MPH MOST PROBABLE PEAK HAIL SIZE...2.00-3.50 IN Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0800 PM CDT Sat May 16 2026 Valid 170100Z - 171200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS NORTHERN KANSAS AND SOUTHERN NEBRASKA... ...SUMMARY... Severe thunderstorms capable of producing large hail, severe/damaging winds (some 75+ mph), and a couple tornadoes remain possible tonight, especially across southern Nebraska and northern Kansas. ...01z Update - Central Plains/Missouri Valley... Primary scenario this evening will be an upscale-growing/organizing cluster of storms across northern Kansas and southern Nebraska. A bit more spatial room has been given (southward adjusted) across northern Kansas (mostly north of I-70) for what may still be a post-01z increasing damaging wind potential, including significant-caliber wind gusts across northern Kansas and far southern Nebraska, aside from a lingering broad regional potential for some large hail as well. Measured 85 mph gusts have recently been reported near Colby, Kansas. ..Guyer.. 05/17/2026 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0800 PM CDT Sat May 16 2026 Valid 170100Z - 171200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS NORTHERN KANSAS AND SOUTHERN NEBRASKA... ...SUMMARY... Severe thunderstorms capable of producing large hail, severe/damaging winds (some 75+ mph), and a couple tornadoes remain possible tonight, especially across southern Nebraska and northern Kansas. ...01z Update - Central Plains/Missouri Valley... Primary scenario this evening will be an upscale-growing/organizing cluster of storms across northern Kansas and southern Nebraska. A bit more spatial room has been given (southward adjusted) across northern Kansas (mostly north of I-70) for what may still be a post-01z increasing damaging wind potential, including significant-caliber wind gusts across northern Kansas and far southern Nebraska, aside from a lingering broad regional potential for some large hail as well. Measured 85 mph gusts have recently been reported near Colby, Kansas. ..Guyer.. 05/17/2026 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0800 PM CDT Sat May 16 2026 Valid 170100Z - 171200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS NORTHERN KANSAS AND SOUTHERN NEBRASKA... ...SUMMARY... Severe thunderstorms capable of producing large hail, severe/damaging winds (some 75+ mph), and a couple tornadoes remain possible tonight, especially across southern Nebraska and northern Kansas. ...01z Update - Central Plains/Missouri Valley... Primary scenario this evening will be an upscale-growing/organizing cluster of storms across northern Kansas and southern Nebraska. A bit more spatial room has been given (southward adjusted) across northern Kansas (mostly north of I-70) for what may still be a post-01z increasing damaging wind potential, including significant-caliber wind gusts across northern Kansas and far southern Nebraska, aside from a lingering broad regional potential for some large hail as well. Measured 85 mph gusts have recently been reported near Colby, Kansas. ..Guyer.. 05/17/2026 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0800 PM CDT Sat May 16 2026 Valid 170100Z - 171200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS NORTHERN KANSAS AND SOUTHERN NEBRASKA... ...SUMMARY... Severe thunderstorms capable of producing large hail, severe/damaging winds (some 75+ mph), and a couple tornadoes remain possible tonight, especially across southern Nebraska and northern Kansas. ...01z Update - Central Plains/Missouri Valley... Primary scenario this evening will be an upscale-growing/organizing cluster of storms across northern Kansas and southern Nebraska. A bit more spatial room has been given (southward adjusted) across northern Kansas (mostly north of I-70) for what may still be a post-01z increasing damaging wind potential, including significant-caliber wind gusts across northern Kansas and far southern Nebraska, aside from a lingering broad regional potential for some large hail as well. Measured 85 mph gusts have recently been reported near Colby, Kansas. ..Guyer.. 05/17/2026 Read more

WW 0210 Status Updates
STATUS REPORT ON WW 210 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 W SDA TO 30 NW LWD TO 25 SSE OXV. ..SQUITIERI..05/17/26 ATTN...WFO...DMX...OAX...EAX... STATUS REPORT FOR WT 210 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC007-053-071-145-159-173-185-170140- IA . IOWA COUNTIES INCLUDED ARE APPANOOSE DECATUR FREMONT PAGE RINGGOLD TAYLOR WAYNE MOC001-025-061-063-075-079-081-115-117-121-129-147-171-197-211- 227-170140- MO . MISSOURI COUNTIES INCLUDED ARE ADAIR CALDWELL DAVIESS DEKALB GENTRY GRUNDY HARRISON LINN LIVINGSTON MACON MERCER NODAWAY PUTNAM SCHUYLER SULLIVAN WORTH THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE Read more

MD 0740 CONCERNING TORNADO WATCH 210... FOR PARTS OF SOUTHERN IOWA INTO NORTHERN MISSOURI
Mesoscale Discussion 0740 NWS Storm Prediction Center Norman OK 0646 PM CDT Sat May 16 2026 Areas affected...parts of southern Iowa into northern Missouri Concerning...Tornado Watch 210... Valid 162346Z - 170115Z The severe weather threat for Tornado Watch 210 continues. SUMMARY...Severe storms should continue to pose a threat for severe wind/hail and perhaps a couple of tornadoes (over northern MO) over at least the next few hours. Hail exceeding 2 inches in diameter remains possible. DISCUSSION...Multiple supercells with a history of 2+ inch hail continue to progress east-southeastward along a quasi-stationary baroclinic boundary over southern IA into northern MO. Along the moist side of the boundary, 68 F surface dewpoints are contributing to over 3000 J/kg MLCAPE, and given a well-mixed boundary layer with minimal MLCINH, supercell structures should persist with a severe hail/wind threat. Low-level shear seems weak overall, which may be why tornado potential has not proven robust (with only one brief tornado reported in IA). Questions also remain regarding how much more 2+ inch diameter hail will occur given an increase in frequent storm interactions. Nonetheless, given ample instability in place, any supercell structures that can remain discrete and/or dominant will continue to pose a severe wind/hail risk, and 2+ inch diameter hail or a couple of tornadoes are possible. The best chance for significant severe hail and/or tornadoes will exist with supercells over northern MO, which are dominant, discrete, and are in closer proximity to the most unstable airmass. ..Squitieri.. 05/16/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LSX...DMX...EAX...OAX... LAT...LON 41209519 41159391 41069341 40859296 40559257 40019233 39769265 39689309 39709353 40009414 40399473 40679508 40939530 41209519 MOST PROBABLE PEAK TORNADO INTENSITY...100-125 MPH MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN Read more

WW 0209 Status Updates
STATUS REPORT ON WW 209 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NNE LAA TO 10 ESE ITR TO 40 WSW IML TO 30 ESE SNY TO 15 E AIA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 0741 ..JEWELL..05/17/26 ATTN...WFO...GLD...BOU...LBF...CYS... STATUS REPORT FOR WS 209 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC017-063-095-115-125-170140- CO . COLORADO COUNTIES INCLUDED ARE CHEYENNE KIT CARSON PHILLIPS SEDGWICK YUMA KSC023-039-063-065-109-137-153-179-181-193-199-170140- KS . KANSAS COUNTIES INCLUDED ARE CHEYENNE DECATUR GOVE GRAHAM LOGAN NORTON RAWLINS SHERIDAN SHERMAN THOMAS WALLACE NEC005-029-049-057-063-069-075-085-087-091-101-111-113-117-135- 145-171-170140- Read more

WW 0209 Status Updates
STATUS REPORT ON WW 209 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NNE LAA TO 10 ESE ITR TO 40 WSW IML TO 30 ESE SNY TO 15 E AIA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 0741 ..JEWELL..05/17/26 ATTN...WFO...GLD...BOU...LBF...CYS... STATUS REPORT FOR WS 209 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC017-063-095-115-125-170140- CO . COLORADO COUNTIES INCLUDED ARE CHEYENNE KIT CARSON PHILLIPS SEDGWICK YUMA KSC023-039-063-065-109-137-153-179-181-193-199-170140- KS . KANSAS COUNTIES INCLUDED ARE CHEYENNE DECATUR GOVE GRAHAM LOGAN NORTON RAWLINS SHERIDAN SHERMAN THOMAS WALLACE NEC005-029-049-057-063-069-075-085-087-091-101-111-113-117-135- 145-171-170140- Read more

WW 0211 Status Updates
STATUS REPORT ON WW 211 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 0741 ..JEWELL..05/17/26 ATTN...WFO...OAX...EAX...TOP...GID...LBF... STATUS REPORT FOR WS 211 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC155-170140- IA . IOWA COUNTIES INCLUDED ARE POTTAWATTAMIE KSC005-013-027-029-043-085-089-117-123-131-141-147-149-157-161- 163-183-201-170140- KS . KANSAS COUNTIES INCLUDED ARE ATCHISON BROWN CLAY CLOUD DONIPHAN JACKSON JEWELL MARSHALL MITCHELL NEMAHA OSBORNE PHILLIPS POTTAWATOMIE REPUBLIC RILEY ROOKS SMITH WASHINGTON MOC003-005-087-170140- Read more

WW 0211 Status Updates
STATUS REPORT ON WW 211 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 0741 ..JEWELL..05/17/26 ATTN...WFO...OAX...EAX...TOP...GID...LBF... STATUS REPORT FOR WS 211 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC155-170140- IA . IOWA COUNTIES INCLUDED ARE POTTAWATTAMIE KSC005-013-027-029-043-085-089-117-123-131-141-147-149-157-161- 163-183-201-170140- KS . KANSAS COUNTIES INCLUDED ARE ATCHISON BROWN CLAY CLOUD DONIPHAN JACKSON JEWELL MARSHALL MITCHELL NEMAHA OSBORNE PHILLIPS POTTAWATOMIE REPUBLIC RILEY ROOKS SMITH WASHINGTON MOC003-005-087-170140- Read more

WW 0208 Status Updates
STATUS REPORT ON WW 208 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 NNE PAH TO 45 ENE MVN TO 15 N HUF. ..SQUITIERI..05/16/26 ATTN...WFO...LSX...ILX...PAH...IND...LMK...ILN... STATUS REPORT FOR WS 208 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC033-047-101-185-193-170040- IL . ILLINOIS COUNTIES INCLUDED ARE CRAWFORD EDWARDS LAWRENCE WABASH WHITE INC005-013-019-025-027-029-031-037-043-051-055-061-071-077-079- 083-093-101-105-115-117-123-125-129-137-143-147-153-155-163-173- 175-170040- IN . INDIANA COUNTIES INCLUDED ARE BARTHOLOMEW BROWN CLARK CRAWFORD DAVIESS DEARBORN DECATUR DUBOIS FLOYD GIBSON GREENE HARRISON JACKSON JEFFERSON JENNINGS KNOX LAWRENCE MARTIN MONROE OHIO ORANGE PERRY PIKE POSEY RIPLEY SCOTT SPENCER Read more

WW 0208 Status Updates
STATUS REPORT ON WW 208 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 NNE PAH TO 45 ENE MVN TO 15 N HUF. ..SQUITIERI..05/16/26 ATTN...WFO...LSX...ILX...PAH...IND...LMK...ILN... STATUS REPORT FOR WS 208 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC033-047-101-185-193-170040- IL . ILLINOIS COUNTIES INCLUDED ARE CRAWFORD EDWARDS LAWRENCE WABASH WHITE INC005-013-019-025-027-029-031-037-043-051-055-061-071-077-079- 083-093-101-105-115-117-123-125-129-137-143-147-153-155-163-173- 175-170040- IN . INDIANA COUNTIES INCLUDED ARE BARTHOLOMEW BROWN CLARK CRAWFORD DAVIESS DEARBORN DECATUR DUBOIS FLOYD GIBSON GREENE HARRISON JACKSON JEFFERSON JENNINGS KNOX LAWRENCE MARTIN MONROE OHIO ORANGE PERRY PIKE POSEY RIPLEY SCOTT SPENCER Read more

WW 0208 Status Updates
STATUS REPORT ON WW 208 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 NNE PAH TO 45 ENE MVN TO 15 N HUF. ..SQUITIERI..05/16/26 ATTN...WFO...LSX...ILX...PAH...IND...LMK...ILN... STATUS REPORT FOR WS 208 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC033-047-101-185-193-170040- IL . ILLINOIS COUNTIES INCLUDED ARE CRAWFORD EDWARDS LAWRENCE WABASH WHITE INC005-013-019-025-027-029-031-037-043-051-055-061-071-077-079- 083-093-101-105-115-117-123-125-129-137-143-147-153-155-163-173- 175-170040- IN . INDIANA COUNTIES INCLUDED ARE BARTHOLOMEW BROWN CLARK CRAWFORD DAVIESS DEARBORN DECATUR DUBOIS FLOYD GIBSON GREENE HARRISON JACKSON JEFFERSON JENNINGS KNOX LAWRENCE MARTIN MONROE OHIO ORANGE PERRY PIKE POSEY RIPLEY SCOTT SPENCER Read more

WW 0208 Status Updates
STATUS REPORT ON WW 208 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 NNE PAH TO 45 ENE MVN TO 15 N HUF. ..SQUITIERI..05/16/26 ATTN...WFO...LSX...ILX...PAH...IND...LMK...ILN... STATUS REPORT FOR WS 208 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC033-047-101-185-193-170040- IL . ILLINOIS COUNTIES INCLUDED ARE CRAWFORD EDWARDS LAWRENCE WABASH WHITE INC005-013-019-025-027-029-031-037-043-051-055-061-071-077-079- 083-093-101-105-115-117-123-125-129-137-143-147-153-155-163-173- 175-170040- IN . INDIANA COUNTIES INCLUDED ARE BARTHOLOMEW BROWN CLARK CRAWFORD DAVIESS DEARBORN DECATUR DUBOIS FLOYD GIBSON GREENE HARRISON JACKSON JEFFERSON JENNINGS KNOX LAWRENCE MARTIN MONROE OHIO ORANGE PERRY PIKE POSEY RIPLEY SCOTT SPENCER Read more

WW 208 SEVERE TSTM IL IN KY 162045Z - 170300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 208 NWS Storm Prediction Center Norman OK 345 PM CDT Sat May 16 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southern Illinois Southern Indiana Northern Kentucky * Effective this Saturday afternoon and evening from 345 PM until 1000 PM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Scattered large hail events to 1.5 inches in diameter possible SUMMARY...Strong to severe thunderstorms are expected to increase in coverage this afternoon and evening within the moist and unstable environment in place from southern Illinois into southern Indiana and northern Kentucky. The strongest storms within this region will be capable of large hail and/or damaging gusts. The severe thunderstorm watch area is approximately along and 60 statute miles north and south of a line from 40 miles west southwest of Salem IL to 65 miles northeast of Louisville KY. 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. && 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 550. Mean storm motion vector 25020. ...Mosier Read more