Storms developed along an old outflow boundary across portions of northeast Missouri and west central Illinois. There were numerous reports of damaging winds and several reports of flash flooding.
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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 along an old outflow boundary across portions of northeast Missouri and west central Illinois. There were numerous reports of damaging winds and several reports of flash flooding.
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 25, 5:57 PM CST, 4 hours 5 minutes earlier.
Area Forecast Discussion...Updated Aviation National Weather Service Saint Louis MO 657 PM CDT Sat May 25 2019 .SHORT TERM... (Through Late Monday Night) Issued at 321 PM CDT Sat May 25 2019 CAMs are indicating another round of strong to severe storms developing, especially over northern portions of forecast area early this evening through the overnight hours along an old outflow boundary. With 0-6km shear 40+ kts, ML CAPES around 3000 J/kg, SCP values over 10, expect scattered supercell development with main threats being large hail and damaging winds. In the meantime, as an upper level shortwave lifts out of a trof to our west with decent moisture convergence on nose of LLJ, will see another thunderstorm complex develop and track east, mainly along and north of I-70 corridor, moving into the forecast area after 09z Sunday. This complex will gradually weaken as it tracks to the east, laying out numerous boundaries. These boundaries will be the focus of activity that could fire up during the afternoon hours on Sunday. Once again activity will then shift back to the north as upper ridge builds back into region. So for Sunday night through Memorial Day, the best chances of showers and storms will be across portions of northeast MO and west central IL. Lows tonight will be at least 10 degrees above normal, in the mid 60s to low 70s. Highs on Sunday will be a bit lower than today due to cloud cover and precipitation, in the upper 70s to mid 80s. Lows Sunday night will be in the mid to upper 60s. Then hot and humid conditions expected on Memorial Day with highs in the 80s. Dry and mild weather expected Monday night with lows between 65 and 70 degrees. Byrd .LONG TERM... (Tuesday through Next Saturday) Issued at 321 PM CDT Sat May 25 2019 Unsettled weather will persist into the middle of next week. Models are still indicating that the upper level ridge will break down once again allowing a developing system over the Central Plains to slide through region. However, the models are a bit slower with this system as it deepens over the Central Plains and is slowly ejected out towards the Great Lakes. Beginning Tuesday afternoon decent instability, low level moisture and convergence increase over region ahead of pre-frontal trof, so will see strong to severe storms develop by late afternoon and through the overnight hours Tuesday night. Another round of showers and storms are expected Wednesday night through Thursday morning as main cold front slides through. Beyond Thursday morning, dry and mild weather expected through Friday before next system moves in for the first part of next weekend. Temperatures will remain rather mild through the extended period. Tuesday will be the warmest day with highs in the 80s, then a bit cooler in the mid 70s to low 80s for the rest of the extended period. Byrd && .AVIATION... (For the 00z TAFs through 00z Sunday Evening) Issued at 541 PM CDT Sat May 25 2019 Thunderstorms will continue to develop in northwestern MO this evening just south of an approaching cold front and on the nose of a south-southwesterly low level jet. These thunderstorms will eventually move into UIN by late tonight and likely into COU by early Sunday morning. The weakening thunderstorm complex may make it into the St Louis metro area early Sunday morning. New thunderstorm development is possible Sunday afternoon along the thunderstorm outflow boundary left behind as the atmosphere destabilizes again with daytime heating. SPECIFICS FOR KSTL: Diurnal cumulus clouds will dissipate this evening with loss of daytime heating. A weakening complex of thunderstorms may move into STL early Sunday morning. New thunderstorm development is possible Sunday afternoon along the thunderstorm outflow boundary left behind as the atmosphere destabilizes again with daytime heating. GKS && .PRELIMINARY POINT TEMPS/POPS... Saint Louis 71 84 68 89 / 40 40 20 20 Quincy 65 79 65 84 / 100 70 30 40 Columbia 66 81 66 86 / 60 70 20 20 Jefferson City 67 82 66 87 / 60 60 10 10 Salem 69 84 65 87 / 30 40 20 10 Farmington 67 84 65 87 / 10 30 10 10 && .LSX WATCHES/WARNINGS/ADVISORIES... MO...None. IL...None. && WFO LSX
Hazardous Weather Outlook...CORRECTED National Weather Service Saint Louis MO 408 PM CDT Sat May 25 2019 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-261200- 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- 408 PM CDT Sat May 25 2019 This Hazardous Weather Outlook is for portions of eastern and central Missouri as well as west central and southwest Illinois. .DAY ONE...Tonight. There is a chance for thunderstorms, especially across portions of central and northeast Missouri and west-central Illinois. Scattered severe storms are possible, mainly in northeast Missouri and west-central Illinois. The primary severe weather threats are large hail and damaging wind gusts. Major river flooding is ongoing along parts of the Missouri, Mississippi, and Illinois Rivers. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Major river flooding is expected to continue along the Mississippi, Missouri, and Illinois Rivers. The chance for thunderstorms will continue across portions of the area each day. A few strong to severe storms are possible on Sunday afternoon and early evening, with a more organized severe weather threat for late Tuesday afternoon and Tuesday night. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed tonight, especially for portions of northeast Missouri and west-central Illinois. Byrd/TES
The Lincoln radar (KILX), 120 km away, was scanning. The volume nearest the first event began at 04:01 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds blew down several telephone poles along County Road 845E.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2019Every state in 2019This day in weather historyWarnings in Illinois, May 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: 829453.