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WW 0155 Status Updates
STATUS REPORT ON WW 155 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 S POF TO 35 S FAM TO 25 WNW SLO. ..SQUITIERI..04/21/25 ATTN...WFO...DVN...LSX...PAH...ILX... STATUS REPORT FOR WT 155 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC003-005-011-021-027-039-051-055-077-081-087-113-115-121-123- 135-139-145-147-153-155-173-181-189-195-199-203-210340- IL . ILLINOIS COUNTIES INCLUDED ARE ALEXANDER BOND BUREAU CHRISTIAN CLINTON DE WITT FAYETTE FRANKLIN JACKSON JEFFERSON JOHNSON MCLEAN MACON MARION MARSHALL MONTGOMERY MOULTRIE PERRY PIATT PULASKI PUTNAM SHELBY UNION WASHINGTON WHITESIDE WILLIAMSON WOODFORD KYC007-210340- KY . KENTUCKY COUNTIES INCLUDED ARE BALLARD Read more

WW 0155 Status Updates
STATUS REPORT ON WW 155 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 S POF TO 35 S FAM TO 25 WNW SLO. ..SQUITIERI..04/21/25 ATTN...WFO...DVN...LSX...PAH...ILX... STATUS REPORT FOR WT 155 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC003-005-011-021-027-039-051-055-077-081-087-113-115-121-123- 135-139-145-147-153-155-173-181-189-195-199-203-210340- IL . ILLINOIS COUNTIES INCLUDED ARE ALEXANDER BOND BUREAU CHRISTIAN CLINTON DE WITT FAYETTE FRANKLIN JACKSON JEFFERSON JOHNSON MCLEAN MACON MARION MARSHALL MONTGOMERY MOULTRIE PERRY PIATT PULASKI PUTNAM SHELBY UNION WASHINGTON WHITESIDE WILLIAMSON WOODFORD KYC007-210340- KY . KENTUCKY COUNTIES INCLUDED ARE BALLARD Read more

WW 0155 Status Updates
STATUS REPORT ON WW 155 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 S POF TO 35 S FAM TO 25 WNW SLO. ..SQUITIERI..04/21/25 ATTN...WFO...DVN...LSX...PAH...ILX... STATUS REPORT FOR WT 155 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC003-005-011-021-027-039-051-055-077-081-087-113-115-121-123- 135-139-145-147-153-155-173-181-189-195-199-203-210340- IL . ILLINOIS COUNTIES INCLUDED ARE ALEXANDER BOND BUREAU CHRISTIAN CLINTON DE WITT FAYETTE FRANKLIN JACKSON JEFFERSON JOHNSON MCLEAN MACON MARION MARSHALL MONTGOMERY MOULTRIE PERRY PIATT PULASKI PUTNAM SHELBY UNION WASHINGTON WHITESIDE WILLIAMSON WOODFORD KYC007-210340- KY . KENTUCKY COUNTIES INCLUDED ARE BALLARD Read more

WW 0155 Status Updates
STATUS REPORT ON WW 155 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 S POF TO 35 S FAM TO 25 WNW SLO. ..SQUITIERI..04/21/25 ATTN...WFO...DVN...LSX...PAH...ILX... STATUS REPORT FOR WT 155 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC003-005-011-021-027-039-051-055-077-081-087-113-115-121-123- 135-139-145-147-153-155-173-181-189-195-199-203-210340- IL . ILLINOIS COUNTIES INCLUDED ARE ALEXANDER BOND BUREAU CHRISTIAN CLINTON DE WITT FAYETTE FRANKLIN JACKSON JEFFERSON JOHNSON MCLEAN MACON MARION MARSHALL MONTGOMERY MOULTRIE PERRY PIATT PULASKI PUTNAM SHELBY UNION WASHINGTON WHITESIDE WILLIAMSON WOODFORD KYC007-210340- KY . KENTUCKY COUNTIES INCLUDED ARE BALLARD Read more

WW 155 TORNADO IA IL KY MO 202040Z - 210400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 155 NWS Storm Prediction Center Norman OK 340 PM CDT Sun Apr 20 2025 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of southeastern Iowa western and centrl Illinois far western Kentucky eastern Missouri * Effective this Sunday afternoon and evening from 340 PM until 1100 PM CDT. * Primary threats include... A few tornadoes and a couple intense tornadoes possible Scattered damaging wind gusts to 70 mph likely Scattered large hail events to 1.5 inches in diameter possible SUMMARY...Ongoing strong/severe thunderstorms are forecast to continue moving eastward/northeastward across Missouri this afternoon and evening, spreading into parts of southeastern Iowa and Illinois over the next several hours. Along with some hail risk, damaging wind gusts are expected, along with potential for tornadoes -- a couple of which could be strong. The tornado watch area is approximately along and 60 statute miles east and west of a line from 30 miles north northeast of Burlington IA to 15 miles east southeast of Poplar Bluff MO. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU5). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and 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. && OTHER WATCH INFORMATION...CONTINUE...WW 154... AVIATION...Tornadoes and 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 23040. ...Goss Read more

MD 0507 CONCERNING TORNADO WATCH 155... FOR EASTERN MISSOURI INTO ILLINOIS
Mesoscale Discussion 0507 NWS Storm Prediction Center Norman OK 0746 PM CDT Sun Apr 20 2025 Areas affected...eastern Missouri into Illinois Concerning...Tornado Watch 155... Valid 210046Z - 210215Z The severe weather threat for Tornado Watch 155 continues. SUMMARY...The severe threat continues across Tornado Watch 155. Strong to severe gusts appear to be the main threat along most of the line, though tornadoes remain possible, particularly with supercells. DISCUSSION...A mature squall line continues to progress eastward amid a strongly sheared, adequately unstable airmass. A line-embedded mesovortex across far west-central IL has supported several estimated/measured severe gusts. While buoyancy ahead of this portion of the line is beginning to diminish considerably, strong synoptic forcing and ambient flow aloft will continue to support mesovortex maintenance and associated strong/severe gust potential, at least in the near-term. Farther south in southeast MO, supercells have entered the southwestern-most portions of the watch, and it is here where short-term tornado potential is greatest. Given strong kinematic fields in place, despite waning buoyancy, at least damaging gust potential may persist with the line downstream, east of the current Tornado Watch, so either a new WW issuance may be needed, or a spatial extension of the ongoing watch may be warranted. ..Squitieri/Guyer.. 04/21/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...PAH...LOT...ILX...MEG...LSX...DVN... LAT...LON 36589107 37449084 39749049 40189062 40929107 41439127 41759097 41739019 41378915 40918861 39968815 38858800 37828812 37018841 36488904 36478985 36499042 36589107 MOST PROBABLE PEAK TORNADO INTENSITY...100-130 MPH MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN Read more

WW 0157 Status Updates
STATUS FOR WATCH 0157 HAS NOT BEEN ISSUED YET Read more

WW 0157 Status Updates
STATUS FOR WATCH 0157 HAS NOT BEEN ISSUED YET Read more

WW 0157 Status Updates
STATUS FOR WATCH 0157 HAS NOT BEEN ISSUED YET Read more

WW 0157 Status Updates
STATUS FOR WATCH 0157 HAS NOT BEEN ISSUED YET Read more

WW 0157 Status Updates
STATUS FOR WATCH 0157 HAS NOT BEEN ISSUED YET Read more

WW 0157 Status Updates
STATUS FOR WATCH 0157 HAS NOT BEEN ISSUED YET Read more

WW 157 TORNADO IL 210155Z - 210900Z
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 157 NWS Storm Prediction Center Norman OK 855 PM CDT Sun Apr 20 2025 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Northern Illinois * Effective this Sunday night and Monday morning from 855 PM until 400 AM CDT. * Primary threats include... A couple tornadoes possible Isolated damaging wind gusts to 70 mph possible SUMMARY...Associated with a line of storms, a brief tornado/wind damage risk may develop east-northeastward across additional parts of northern Illinois through mid/late evening. The tornado watch area is approximately along and 30 statute miles east and west of a line from 45 miles north northwest of Marseilles IL to 75 miles south southeast of Marseilles IL. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU7). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and 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. && OTHER WATCH INFORMATION...CONTINUE...WW 155...WW 156... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean storm motion vector 22035. ...Guyer Read more

WW 0155 Status Updates
STATUS REPORT ON WW 155 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 N ARG TO 30 NNW POF TO 25 SSW BLV TO 5 NNW ALN TO 15 WNW SPI TO 25 SSW PIA TO 10 SW MLI. ..SQUITIERI..04/21/25 ATTN...WFO...DVN...LSX...PAH...ILX... STATUS REPORT FOR WT 155 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC003-005-011-021-027-039-051-055-073-077-081-087-095-107-113- 115-117-119-121-123-125-129-135-139-143-145-147-153-155-157-161- 163-167-173-175-179-181-189-195-199-203-210240- IL . ILLINOIS COUNTIES INCLUDED ARE ALEXANDER BOND BUREAU CHRISTIAN CLINTON DE WITT FAYETTE FRANKLIN HENRY JACKSON JEFFERSON JOHNSON KNOX LOGAN MCLEAN MACON MACOUPIN MADISON MARION MARSHALL MASON MENARD MONTGOMERY MOULTRIE PEORIA PERRY PIATT PULASKI PUTNAM RANDOLPH ROCK ISLAND ST. CLAIR SANGAMON SHELBY STARK TAZEWELL UNION WASHINGTON WHITESIDE WILLIAMSON WOODFORD IAC163-210240- Read more

WW 0155 Status Updates
STATUS REPORT ON WW 155 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 E UNO TO 15 WSW FAM TO 20 NW STL TO 30 ENE UIN TO 40 NNW BRL. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 0507 ..SQUITIERI..04/21/25 ATTN...WFO...DVN...LSX...PAH...ILX... STATUS REPORT FOR WT 155 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC003-005-009-013-017-021-027-051-055-057-061-071-073-077-081- 083-087-095-107-109-117-119-121-125-129-131-133-135-137-143-145- 153-157-161-163-167-169-171-175-179-181-187-189-199-210140- IL . ILLINOIS COUNTIES INCLUDED ARE ALEXANDER BOND BROWN CALHOUN CASS CHRISTIAN CLINTON FAYETTE FRANKLIN FULTON GREENE HENDERSON HENRY JACKSON JEFFERSON JERSEY JOHNSON KNOX LOGAN MCDONOUGH MACOUPIN MADISON MARION MASON MENARD MERCER MONROE MONTGOMERY MORGAN PEORIA PERRY PULASKI RANDOLPH ROCK ISLAND ST. CLAIR SANGAMON SCHUYLER SCOTT STARK TAZEWELL UNION WARREN WASHINGTON WILLIAMSON Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0745 PM CDT Sun Apr 20 2025 Valid 210100Z - 211200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE MID MISSISSIPPI VALLEY INTO WESTERN TENNESSEE... ...SUMMARY... Severe thunderstorms will spread across the mid Mississippi Valley into western Tennessee this evening. A few tornadoes remain possible, along with the threat of wind and perhaps some hail. ...01z Update... Strong negative-tilt short-wave trough is ejecting northeast across eastern KS/western MO early this evening. This feature is contributing to an elongated band of convection that currently arcs from western IL-southeast MO-central AR-southeast TX, coincident with the primary synoptic cold front surging east. Over the last few hours the most concentrated corridor of supercells has shifted into eastern AR where no less than four distinct supercells are spreading across western portions of ww156. Latest model guidance suggests the LLJ will increase across northern MS/western TN/KY later this evening. There is some concern this activity may spread a bit farther downstream than depicted in earlier day1 convective outlook. Forecast sounding for MEM at 06z exhibits more than adequate SBCAPE for robust updrafts, and strong shear is favorable for the maintenance of these storms. Will adjust the SLGT/MRGL Risks east to account for this scenario. ..Darrow.. 04/21/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0745 PM CDT Sun Apr 20 2025 Valid 210100Z - 211200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE MID MISSISSIPPI VALLEY INTO WESTERN TENNESSEE... ...SUMMARY... Severe thunderstorms will spread across the mid Mississippi Valley into western Tennessee this evening. A few tornadoes remain possible, along with the threat of wind and perhaps some hail. ...01z Update... Strong negative-tilt short-wave trough is ejecting northeast across eastern KS/western MO early this evening. This feature is contributing to an elongated band of convection that currently arcs from western IL-southeast MO-central AR-southeast TX, coincident with the primary synoptic cold front surging east. Over the last few hours the most concentrated corridor of supercells has shifted into eastern AR where no less than four distinct supercells are spreading across western portions of ww156. Latest model guidance suggests the LLJ will increase across northern MS/western TN/KY later this evening. There is some concern this activity may spread a bit farther downstream than depicted in earlier day1 convective outlook. Forecast sounding for MEM at 06z exhibits more than adequate SBCAPE for robust updrafts, and strong shear is favorable for the maintenance of these storms. Will adjust the SLGT/MRGL Risks east to account for this scenario. ..Darrow.. 04/21/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0745 PM CDT Sun Apr 20 2025 Valid 210100Z - 211200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE MID MISSISSIPPI VALLEY INTO WESTERN TENNESSEE... ...SUMMARY... Severe thunderstorms will spread across the mid Mississippi Valley into western Tennessee this evening. A few tornadoes remain possible, along with the threat of wind and perhaps some hail. ...01z Update... Strong negative-tilt short-wave trough is ejecting northeast across eastern KS/western MO early this evening. This feature is contributing to an elongated band of convection that currently arcs from western IL-southeast MO-central AR-southeast TX, coincident with the primary synoptic cold front surging east. Over the last few hours the most concentrated corridor of supercells has shifted into eastern AR where no less than four distinct supercells are spreading across western portions of ww156. Latest model guidance suggests the LLJ will increase across northern MS/western TN/KY later this evening. There is some concern this activity may spread a bit farther downstream than depicted in earlier day1 convective outlook. Forecast sounding for MEM at 06z exhibits more than adequate SBCAPE for robust updrafts, and strong shear is favorable for the maintenance of these storms. Will adjust the SLGT/MRGL Risks east to account for this scenario. ..Darrow.. 04/21/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0745 PM CDT Sun Apr 20 2025 Valid 210100Z - 211200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE MID MISSISSIPPI VALLEY INTO WESTERN TENNESSEE... ...SUMMARY... Severe thunderstorms will spread across the mid Mississippi Valley into western Tennessee this evening. A few tornadoes remain possible, along with the threat of wind and perhaps some hail. ...01z Update... Strong negative-tilt short-wave trough is ejecting northeast across eastern KS/western MO early this evening. This feature is contributing to an elongated band of convection that currently arcs from western IL-southeast MO-central AR-southeast TX, coincident with the primary synoptic cold front surging east. Over the last few hours the most concentrated corridor of supercells has shifted into eastern AR where no less than four distinct supercells are spreading across western portions of ww156. Latest model guidance suggests the LLJ will increase across northern MS/western TN/KY later this evening. There is some concern this activity may spread a bit farther downstream than depicted in earlier day1 convective outlook. Forecast sounding for MEM at 06z exhibits more than adequate SBCAPE for robust updrafts, and strong shear is favorable for the maintenance of these storms. Will adjust the SLGT/MRGL Risks east to account for this scenario. ..Darrow.. 04/21/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0745 PM CDT Sun Apr 20 2025 Valid 210100Z - 211200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE MID MISSISSIPPI VALLEY INTO WESTERN TENNESSEE... ...SUMMARY... Severe thunderstorms will spread across the mid Mississippi Valley into western Tennessee this evening. A few tornadoes remain possible, along with the threat of wind and perhaps some hail. ...01z Update... Strong negative-tilt short-wave trough is ejecting northeast across eastern KS/western MO early this evening. This feature is contributing to an elongated band of convection that currently arcs from western IL-southeast MO-central AR-southeast TX, coincident with the primary synoptic cold front surging east. Over the last few hours the most concentrated corridor of supercells has shifted into eastern AR where no less than four distinct supercells are spreading across western portions of ww156. Latest model guidance suggests the LLJ will increase across northern MS/western TN/KY later this evening. There is some concern this activity may spread a bit farther downstream than depicted in earlier day1 convective outlook. Forecast sounding for MEM at 06z exhibits more than adequate SBCAPE for robust updrafts, and strong shear is favorable for the maintenance of these storms. Will adjust the SLGT/MRGL Risks east to account for this scenario. ..Darrow.. 04/21/2025 Read more