A line of strong to severe storms moved through portions of southeast Missouri during the afternoon hours of August 26th.
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.
A line of strong to severe storms moved through portions of southeast Missouri during the afternoon hours of August 26th.
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 Aug 26, 2:44 PM CST, 34 minutes earlier.
Area Forecast Discussion National Weather Service Saint Louis MO 344 PM CDT Mon Aug 26 2019 .SHORT TERM... (Through Late Tuesday Night) Issued at 307 PM CDT Mon Aug 26 2019 A severe MCS was moving eastward through southeastern MO late this afternoon with damaging winds. This MCS will should remain just south of STL and shift southeast of our forecast area around 00Z Tuesday. A line of convection is expected to develop later this evening along a cold front which will move southeastward through our forecast area tonight. Current thinking is that the atmosphere will not have enough time to recover after the current late afternoon MCS for much severe convection tonight. The storms should also be relatively fast moving, limiting the rainfall amounts and any flash flood threat. Most of this convection should shift southeast of the forecast area by Tuesday morning with gradually clearing skies as drier air filters into the region behind the cold front. Cooler and less humid conditions can be expected Tuesday and Tuesday night as upper level heights lower as an upper level trough deepens over the northern Plains with a surface ridge building southeast into MO from the northern Plains. GKS .LONG TERM... (Wednesday through Next Monday) Issued at 307 PM CDT Mon Aug 26 2019 Dry and unseasonably cool conditions will continue through Wednesday night with northwest upper level flow, and the surface ridge shifting slowly eastward through our region. Gradually warming temperatures can be expected beginning on Thursday as the wind becomes south-southwesterly as the surface ridge shifts southeast of our area. The chance of rain will return by Friday as a cold front sags southward into our forecast area. The chance of convection will continue through at least Saturday as the front will make only slow progress southward, and as several northwest flow shortwaves drop southeastward through the region. Temperatures should trend cooler again by late in the weekend due to increased cloud cover during the day with slightly cooler air filtering into the region as the front finally shifts south of our area. GKS && .AVIATION... (For the 18z TAFs through 18z Tuesday Afternoon) Issued at 1151 AM CDT Mon Aug 26 2019 The MVFR cigs should improve into the VFR category this afternoon due to daytime heating, mixing and drying of the boundary layer. Convection over west central MO should move into COU this afternoon. Could not rule out widely scattered showers/storms elsewhere late this afternoon, but looks like the best coverage of storms will occur this evening into the overnight hours as a cold front drops southeastward through our area. This convection should shift southeast of the taf sites by early Tuesday morning. The cloud ceiling should drop into the MVFR category late tonight and possibly even briefly into the IFR category. The cloud ceiling will improve by late Tuesday morning as drier air advects into the region behind the cold front. Surface winds will be mainly southwesterly this afternoon, then veer around to a northwest direction late tonight after fropa. SPECIFICS FOR KSTL: The MVFR cigs should improve into the VFR category this afternoon due to daytime heating, mixing and drying of the boundary layer. Could not rule out widely scattered showers/storms late this afternoon, but looks like the best coverage of storms will occur late this evening into the overnight hours as a cold front drops southeastward through our area. This convection should shift southeast of STL by early Tuesday morning. The cloud ceiling should drop into the MVFR category late tonight and possibly even briefly into the IFR category. The cloud ceiling will improve back into the VFR category by early Tuesday afternoon as drier air advects into the region behind the cold front. Surface winds will be mainly southwesterly this afternoon, then veer around to a northwest direction by early Tuesday morning after fropa. GKS && .LSX WATCHES/WARNINGS/ADVISORIES... MO...None. IL...None. && WFO LSX
Hazardous Weather Outlook National Weather Service Saint Louis MO 357 PM CDT Mon Aug 26 2019 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-272100- Adams IL-Audrain MO-Bond IL-Boone MO-Brown IL-Calhoun IL-Callaway MO- Clinton IL-Cole MO-Crawford MO-Fayette IL-Franklin MO-Gasconade MO- Greene IL-Iron MO-Jefferson MO-Jersey IL-Knox MO-Lewis MO-Lincoln MO- Macoupin IL-Madison IL-Madison MO-Marion IL-Marion MO-Moniteau MO- Monroe IL-Monroe MO-Montgomery IL-Montgomery MO-Osage MO-Pike IL- Pike MO-Ralls MO-Randolph IL-Reynolds MO-Saint Charles MO- Saint Clair IL-Saint Francois MO-Saint Louis City MO-Saint Louis MO- Sainte Genevieve MO-Shelby MO-Warren MO-Washington IL-Washington MO- 357 PM CDT Mon Aug 26 2019 This Hazardous Weather Outlook is for portions of eastern and central Missouri as well as west central and southwest Illinois. .DAY ONE...Tonight. Severe thunderstorms are possible tonight, particularly across southeast Missouri and southwest Illinois. Damaging winds are the primary threat, but large hail and isolated tornadoes are also possible. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is another chance of thunderstorms over portions of the area from Friday through Saturday evening. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed tonight. GKS
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1256 PM CDT MON AUG 26 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1245 PM HEAVY RAIN 2 SSW MANCHESTER 38.57N 90.52W
08/26/2019 M5.10 INCH ST. LOUIS MO TRAINED SPOTTER
TOTAL RAINFALL FROM OVERNIGHT AND MORNING
THUNDERSTORMS. RAINFALL OBSERVATION WAS
TAKEN NEAR BIG BEND IN BALLWIN.
&&
MAPLESPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
253 PM CDT MON AUG 26 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0514 AM FLASH FLOOD 1 WNW BIG SPRING 38.80N 91.51W
08/26/2019 MONTGOMERY MO DEPT OF HIGHWAYS
MODOT CLOSED ROUTE K BETWEEN ROUTE HH AND
STATE HIGHWAY 19 DUE TO FLASH FLOODING.
&&
MFPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
255 PM CDT MON AUG 26 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0758 AM FLASH FLOOD 2 E BIG SPRING 38.80N 91.45W
08/26/2019 MONTGOMERY MO DEPT OF HIGHWAYS
MODOT CLOSED ROUTE Y EAST OF STATE HIGHWAY
19 DUE TO FLASH FLOODING.
&&
MFPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
306 PM CDT MON AUG 26 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0642 AM FLASH FLOOD MARTHASVILLE 38.63N 91.05W
08/26/2019 WARREN MO DEPT OF HIGHWAYS
MODOT CLOSED BOTH ROUTE D IN MARTHASVILLE
AND ROUTE TT BETWEEN STATE HWY 19 AND ROUTE
T DUE TO FLASH FLOODING.
&&
MFThe St Louis radar (KLSX), 131 km away, was scanning. The volume nearest the first event began at 21:17 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds blew down a large tree in town.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2019Every state in 2019This day in weather historyWarnings in Missouri, August 2019
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: 856803.