Storms developed ahead of a cold front. Some of the storms produced damaging winds.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LSX wrote it up.
Storms developed ahead of a cold front. Some of the storms produced damaging winds.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS St. Louis, MO wrote its last area forecast discussion before the first event at May 24, 5:49 PM CST, 2 hours 51 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED AVIATION NATIONAL WEATHER SERVICE ST LOUIS MO 649 PM CDT Sun May 24 2015 .SHORT TERM: (Through Late Tonight) Issued at 200 PM CDT Sun May 24 2015 Isolated to scattered thunderstorms will continue to develop in the unstable airmass this afternoon ahead of the main band of rain and storms that is aligned north to south from near IRK to SGF. Initial tornado threat will be with the MCV structure that is currently moving north-northeast from Sedalia to Kirksville the next few hours. Perhaps this activity will skirt our western CWA, but the larger threat of strong to severe thunderstorms will arrive a bit later this afternoon and evening. A strong shortwave will lift northeast across the region with an arcing band of thunderstorms accompanying it. The enviroment will be supportive of embedded mesovortices and short lived tornadoes as low level shear and helicity values will increase as the surface wind begins to back to the south-southeast as low pressure forms to our west. This activity should be progressive and therefore the threat of flash flooding remains low in our CWA. CVKING .LONG TERM: (Memorial Day through Sunday) Issued at 200 PM CDT Sun May 24 2015 Memorial Day still looks dry as subsidence is expected behind tonights system. Temperatures should be quite mild with some sunshine expected. The dry weather will not last long thought as next shortwave will move through the area Monday night and Tuesday morning bringing the area another round of showers and thunderstorms. Timing of convection has me doubting we see much severe weather on Tuesday. The pattern remains active the remainder of the week and straight into next weekend. Chance of thunderstorms each day with mild temperatures. Severe weather chances will depend on timing of individual shortwaves and available instability/shear. && .AVIATION: (For the 00z TAFs through 00z Monday Evening) Issued at 607 PM CDT Sun May 24 2015 Expect periods of SH/TS to continue through the evening until a low pressure system lifts away from the area. MVFR ceilings are expected to persist for several hours after the rain has ended. Once ceilings fall to MVFR later tonight, improvement is not expected until after 12z. Winds will remain southeasterly to southerly, then turn southwesterly after 06z with the passage of the surface low. Winds are forecast to back once again and become southerly after 18z. Kanofsky && .LSX WATCHES/WARNINGS/ADVISORIES: MO...NONE. IL...NONE. && WFO LSX
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 134 PM CDT SUN MAY 24 2015 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-251200- GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL- MARION IL-WASHINGTON IL-RANDOLPH IL-ADAMS IL-BROWN IL-PIKE IL- CALHOUN IL-JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL-KNOX MO- LEWIS MO-SHELBY MO-MARION MO-MONROE MO-RALLS MO-PIKE MO-BOONE MO- AUDRAIN MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO- LINCOLN MO-GASCONADE MO-WARREN MO-ST. CHARLES MO-FRANKLIN MO- ST. LOUIS MO-ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO- WASHINGTON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO- MADISON MO-REYNOLDS MO- 134 PM CDT SUN MAY 24 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS THIS AFTERNOON WILL BECOME MORE NUMEROUS THIS EVENING. SOME OF THESE THUNDERSTORMS MAY BECOME SEVERE AND CAPABLE OF PRODUCING LOCALLY DAMAGING WIND GUSTS OF 60 MPH AND A FEW SHORT-LIVED TORNADOES. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE IS A CHANCE OF THUNDERSTORMS MOST OF THIS WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT ALL SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN ST. LOUIS THIS AFTERNOON AND EVENING. CVKING
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 653 PM CDT SUN MAY 24 2015 MOZ074-075-084-085-250045- IRON MO-MADISON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO- 653 PM CDT SUN MAY 24 2015 ...SIGNIFICANT WEATHER ADVISORY FOR ST. FRANCOIS...WESTERN STE. GENEVIEVE...NORTHWESTERN MADISON AND IRON COUNTIES UNTIL 745 PM CDT... AT 651 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR ARCADIA...OR NEAR IRONTON...MOVING NORTHEAST AT 35 MPH. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... BISMARCK... FARMINGTON... LEADWOOD... DESLOGE... BONNE TERRE... PILOT KNOB... ROSELLE... IRON MOUNTAIN... KNOB LICK... PARK HILLS... THIS STORM WILL AFFECT ELEPHANT ROCKS STATE PARK...FORT DAVIDSON HISTORIC SITE...MISSOURI MINES HISTORIC SITE AND ST. JOE STATE PARK. GLASS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 727 PM CDT SUN MAY 24 2015 ILZ058-097-098-MOZ036-052-250115- CALHOUN IL-GREENE IL-LINCOLN MO-PIKE MO-PIKE IL- 727 PM CDT SUN MAY 24 2015 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN GREENE AND CALHOUN COUNTIES IN SOUTHWEST ILLINOIS...AND PIKE COUNTY IN WEST CENTRAL ILLINOIS...AND LINCOLN COUNTY IN EAST CENTRAL MISSOURI...AND PIKE COUNTY IN NORTHEAST MISSOURI UNTIL 815 PM CDT... AT 725 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM CURRYVILLE TO EOLIA TO DAVIS...AND MOVING NORTHEAST AT 40 MPH. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... BOWLING GREEN... ELSBERRY... LOUISIANA... PITTSFIELD... EOLIA... FRANKFORD... CLARKSVILLE... PIKE... PLEASANT HILL... BELLEVIEW... THIS STORM WILL AFFECT CUIVRE RIVER STATE PARK. THIS STORM WILL IMPACT... INTERSTATE 72 FROM EXIT 20 TO EXIT 35. THESE STORMS MAY INTENSIFY....AND A TORNADO WATCH IS IN EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS....FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. GKS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 733 PM CDT SUN MAY 24 2015 MOZ051-059-060-250115- GASCONADE MO-MONTGOMERY MO-WARREN MO- 733 PM CDT SUN MAY 24 2015 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN WARREN...MONTGOMERY AND GASCONADE COUNTIES UNTIL 815 PM CDT... AT 731 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR HERMANN...MOVING NORTH AT 40 MPH. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... MONTGOMERY CITY... BIG SPRING... JONESBURG... NEW FLORENCE... BELLFLOWER... BUELL... THIS STORM WILL AFFECT DEUTSCHHEIM HISTORIC SITE. THIS STORM WILL ALSO IMPACT... INTERSTATE 70 IN MISSOURI FROM EXIT 175 TO EXIT 188. THIS STORM MAY INTENSIFY....AND A TORNADO WATCH IS IN EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS....FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. GKS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 800 PM CDT SUN MAY 24 2015 ILZ096-097-250145- BROWN IL-PIKE IL- 800 PM CDT SUN MAY 24 2015 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN BROWN AND EASTERN PIKE COUNTIES IN WEST CENTRAL ILLINOIS UNTIL 845 PM CDT... AT 759 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR PLEASANT HILL...OR 9 MILES SOUTH OF PITTSFIELD...MOVING NORTHEAST AT 50 MPH. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... PITTSFIELD... GRIGGSVILLE... BUCKHORN... THIS STORM WILL IMPACT... INTERSTATE 72 FROM EXIT 31 TO EXIT 35. THIS STORM MAY INTENSIFY....AND A TORNADO WATCH IS IN EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS....FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. GKS
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
853 PM CDT SUN MAY 24 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0809 PM TSTM WND DMG FARMINGTON 37.78N 90.43W
05/24/2015 ST. FRANCOIS MO LAW ENFORCEMENT
SEVERAL TREES AND POWER LINES BLOWN DOWN AROUND TOWN.
&&
BYRDPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
859 PM CDT SUN MAY 24 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0815 PM TSTM WND DMG 6 NW WEINGARTEN 37.94N 90.29W
05/24/2015 STE. GENEVIEVE MO TRAINED SPOTTER
POWER LINES DOWN AND ROOF DAMAGE AT THE SEVEN FALLS
COMMUNITY NEAR THE INTERSECTION OF ROUTES C AND EE.
&&
CARNEYThe St Louis radar (KLSX), 68 km away, was scanning. The volume nearest the first event began at 02:38 UTC.
4 thunderstorm wind. Local standard time, as filed.
Several trees were blown down as well as numerous tree limbs around town.
Several large tree limbs were blown down around town.
Several power lines were blown down in Centralia. One of the power lines was knocked down by a fallen tree.
Numerous trees were damaged in and around Nokomis.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2015Every state in 2015This day in weather historyWarnings in Illinois, May 2015
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 589163, 589164, 589166, 589167.