An upper level disturbance moved through southern Missouri and into southern Illinois triggering showers and storms. Some of the storms produced damaging winds, large hail and flash flooding.
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.
An upper level disturbance moved through southern Missouri and into southern Illinois triggering showers and storms. Some of the storms produced damaging winds, large hail and 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 Jun 26, 2:41 PM CST, 11 minutes earlier.
Area Forecast Discussion National Weather Service Saint Louis MO 341 PM CDT Wed Jun 26 2019 .SHORT TERM... (Through Late Thursday Night) Issued at 204 PM CDT Wed Jun 26 2019 An MCV over south-central MO was moving slowly eastward this afternoon. This feature was supporting downstream SHRA/TSRA development within a moist and very unstable air mass. Although MLCAPE values were exceeding 3000 J/kg this afternoon, 0-6 km shear values were quite low, and the lack of shear has been hindering storm organization and may also limit how widespread the severe weather threat becomes. Given the low shear, each outflow boundary will become a new focus for potential SHRA/TSRA development within such an unstable environment. Storms should continue progressing eastward in tandem with the slow-moving MCV, but precipitation coverage should diminish across the northern half of the LSX CWA this evening with the loss of diurnal heating. Farther south, the slow-moving MCV may continue to support isolated to scattered SHRA/TSRA into the evening and overnight hours over parts of southern and southeastern MO into southern IL. Flash flooding will be possible if multiple thunderstorm cores repeatedly move over the same locations, but this does not appear to be a widespread threat at this time. SHRA/TSRA will probably continue to percolate across southeastern MO and southern IL on Thu until the MCV has either dissipated or shifted far enough eastward to limit its influence. A pattern change begins taking place on Thu in which an upper ridge axis simultaneously shifts eastward and amplifies downstream of a large closed low over the Pacific Northwest. This pattern will bring warmer weather to the LSX CWA along with lower rain chances. Highs on Thu should be similar to or perhaps a few degrees warmer than they were on Wed (upper 80s to low 90s). Overnight lows on Wed night and Thu night should be similar (upper 60s to around 70). Kanofsky .LONG TERM... (Friday through Next Wednesday) Issued at 204 PM CDT Wed Jun 26 2019 By Fri, the upper ridge axis will be located slightly west of the LSX CWA, and the ridge itself will extend well into central Canada. Several PV anomalies are noted moving around the periphery of the ridge, but the ridge's high amplitude means that these systems will likely remain in Canada or perhaps the extreme northern CONUS. The ridge remains firmly entrenched through the weekend before models suggest that it begins to flatten or perhaps start to break down early next week. At the surface, southerly to southwesterly flow around a surface high pressure center located over the southeastern CONUS will funnel warm and moist air into the region. The combination of heat (highs in the low to mid 90s) and humidity will likely yield heat index values in the mid to upper 90s. Heat index values could be higher depending on the dew points. The next chance for widespread rain appears to be early next week when a weak disturbance moves through the central CONUS after the ridge has flattened. Kanofsky && .AVIATION... (For the 18z TAFs through 18z Thursday Afternoon) Issued at 1151 AM CDT Wed Jun 26 2019 SPECIFICS FOR KCOU, KUIN: A remnant thunderstorm complex over southwestern MO was moving very slowly eastward at TAF issuance. This feature will support scattered SHRA/TSRA from around 26/21z through around 27/02z, but it is unclear whether SHRA/TSRA will extend far enough northward to affect KCOU. Similar concerns exist for KUIN due to a separate remnant thunderstorm complex which was located over extreme northwestern MO at TAF issuance. Otherwise, expect diurnal cumulus and light southerly to southwesterly winds. SPECIFICS FOR KSTL, KSUS, KCPS: VFR conditions are expected for the first 0-3 hours of the valid TAF period, but uncertainty increases after 21z. A remnant thunderstorm complex over southwestern MO was moving very slowly eastward at TAF issuance, and while it is expected to generate additional thunderstorms this afternoon, it is unclear how far north the convection might spread. VCTS from 26/21z - 27/02z seems appropriate at this time until the northern extent of the convection has been established. Otherwise, light southerly to southwesterly winds will persist through the period. Kanofsky && .LSX WATCHES/WARNINGS/ADVISORIES... MO...None. IL...None. && WFO LSX
Hazardous Weather Outlook National Weather Service Saint Louis MO 414 AM CDT Wed Jun 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>075-084-085-099-270915- 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- 414 AM CDT Wed Jun 26 2019 This Hazardous Weather Outlook is for portions of eastern and central Missouri as well as west central and southwest Illinois. .DAY ONE...Today and tonight. There is a chance of thunderstorms this afternoon and early this evening. A few storms may become strong with small hail and strong gusty winds. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. There is a slight chance of thunderstorms across southeast Missouri and southwest Illinois on Thursday. There is also a slight chance of thunderstorms across portions of our area both Monday and Tuesday afternoons. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated through tonight. GKS
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
339 PM CDT WED JUN 26 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0330 PM HAIL 3 SE SUNSET HILLS 38.51N 90.37W
06/26/2019 E0.25 INCH ST. LOUIS MO PUBLIC
PEA TO HALF INCH HAIL FELL AT TESSON FERRY
AND MATTIS ROADS.
&&
MFPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
343 PM CDT WED JUN 26 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0342 PM HAIL 903 HOLLY HILLS AVENUE 38.56N 90.26W
06/26/2019 E0.88 INCH ST. LOUIS CITY MO PUBLIC
&&
MFPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
346 PM CDT WED JUN 26 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0344 PM HAIL 4 SE SAINT LOUIS 38.59N 90.20W
06/26/2019 E0.70 INCH ST. LOUIS CITY MO TRAINED SPOTTER
SPOTTER AT THE ARMY CORPS OF ENGINEERS SITE
ON ARSENAL STREET REPORTS HAIL OF AROUND
ONE-HALF INCH AND SLIGHTLY LARGER.
&&
KANOFSKYPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
347 PM CDT WED JUN 26 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0339 PM TSTM WND GST 1 ENE CAHOKIA 38.57N 90.16W
06/26/2019 E41 MPH ST. CLAIR IL ASOS
36 KT WIND GUST (41 MPH) AT KCPS.
&&
KANOFSKYPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
348 PM CDT WED JUN 26 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0343 PM HAIL 3 NNE LEMAY 38.57N 90.26W
06/26/2019 M1.00 INCH ST. LOUIS CITY MO TRAINED SPOTTER
HAIL VARIED FROM HALF INCH TO 1 INCH IN
DIAMETER.
&&
MFPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
350 PM CDT WED JUN 26 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0343 PM HAIL 1 E SAINT LOUIS 38.64N 90.22W
06/26/2019 E0.25 INCH ST. LOUIS CITY MO PUBLIC
SEVERAL REPORTS OF PEA SIZE HAIL IN ST.
LOUIS CITY BETWEEN 340PM AND 345PM. ONE
REPORT WAS FROM I-55 AND WEBER. ANOTHER WAS
FROM HAMPTON AND LOUGHBOROUGH.
&&
KANOFSKYThe St Louis radar (KLSX), 46 km away, was scanning. The volume nearest the first event began at 20:51 UTC.
2 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds blew down a large tree in Granite City and numerous large tree limbs around Horseshoe Lake.
Thunderstorm winds blew down a large tree across Marine Road on the north side of St. Jacob.
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, June 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: 843675, 843676.