Isolated thunderstorms developed. One storm 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.
Isolated thunderstorms developed. One storm 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 Jun 20, 5:08 PM CST, 1 hour 31 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED AVIATION NATIONAL WEATHER SERVICE ST LOUIS MO 608 PM CDT Fri Jun 20 2014 .SHORT TERM: (Through Late Tonight) Issued at 332 PM CDT Fri Jun 20 2014 We are once again looking at a weak shear, high instability, weak CINH environment where it will not take much to get TSRA going in any one location. Thought the main focus, if there is one, would have been the weak wind shift boundary now making its way into STL metro, but rather it has been the dewpoint density difference across northeast MO, separating mid 70s from mid 60s. Still potential for other areas with satellite imagery showing cloud towers developing over STL metro. Temps in the upper 80s to lower 90s most locales currently. Look for current radar/satellite trends to continue until around sunset with convection dissipating quickly thereafter. Some small hail or gusty winds are possible with the storms that do form thanks to the 3000-4000 CAPE available, but weak shear should prevent any storm for lasting too long before its inevitable decline. Otherwise, should see dry conditions rest of tonight with mostly clear skies. Some fog possible in valley areas due to high dewpoints lingering as winds go calm after sunset. Big question is development of a new MCS over the Mid-MO valley late this afternoon-evening and where it goes from there and how fast. Models seem to want to make a southward turn with what does develop at some point, but likely slow forward speed seems to make this a moot point for rain overnight and more of a question for rain on Saturday. For now have maintained the dry forecast from before. Persistence low-mid 70s looking decent again, with somewhat better cooling potential in northeast MO and west-central IL with lower dewpoints, provided they can stay clear. TES .LONG TERM: (Saturday through Next Friday) Issued at 332 PM CDT Fri Jun 20 2014 Short range models are in good agreement that convection over the Great Plains this afternoon/tonight will produce an MCV which will move across northern portions of our CWFA on Saturday. This MCV along with a dewpoint boundary over northern Missouri/west central Illinois will provide a trigger for convection, generally north of the I-70 corridor. Coverage and intensity of convection is unclear at this time, but forecast MLCAPE is 2000-3000 J/kg with SBCAPE in excess of 4000 J/kg. With this much potential instability to feed off of, any thunderstorms that develop could end up becoming severe. With the uncertainty still high, have left only low to mid chance and slight chance PoPs going in the forecast at this time. The convective trends on Saturday will be critical to what happens Saturday night. Guidance shows a modest low level jet pushing into the cold pool overnight which keeps precip going through the night. Since this is contingent upon the cold pool forming in the first place, have kept only chance PoPs going Saturday night as well. The upper level ridge flattens out Sunday into Monday as a trof digs into the Great Plains. This should allow for more precipitation as the trof moves into the Mississippi Valley. Basically hung with the going forecast with high chance/likely PoPs as the trof moves through the region. Medium range guidance diverges toward the middle of next week with the GFS being more amplified than the ECMWF. GFS has the trof extending from the Great Lakes Region all the way into the Gulf of Mexico while the ECMWF is quasi-zonal Wednesday into Thursday with and upper ridge developing Friday. Needless to say, this is a low confidence extended forecast. Stuck closely to ensemble guidance numbers for temperatures and PoPs through the period. Carney && .AVIATION: (For the 00z TAFs through 00z Saturday Evening) Issued at 521 PM CDT Fri Jun 20 2014 Ongoing convection may drop southeastward into STL and CPS between 00-01Z this evening, but then shower/storm activity should weaken with loss of daytime heating around sunset. Just some high level cloudiness expected for the remainder of the night into Saturday morning. There may be some fog late tonight/early Saturday morning, especially in SUS and CPS as the surface wind becomes calm there along with continued high surface dew points. Diurnal cumulus clouds will develop late Saturday morning and afternoon with widely scattered to scattered showers/storms expected during the afternoon hours. The best chance of rain may occur in UIN with a possible upper level disturbance and outflow boundary generated from nocturnal convection across eastern Nebraska and Iowa. Light surface wind should become s-swly by Saturday afternoon. Specifics for KSTL: May need to include at least VCTS til 01Z in the STL TAF this evening due to southeastward moving convection n-nw of STL. Otherwise much of the cloud cover should dissipate/thin out later this evening along with the nwly surface wind becoming light. Diurnal cumulus clouds will develop again late Saturday morning and afternoon with widely scattered showers/storms expected during the afternoon into the evening. Will include VCSH or VCTS Saturday afternoon in the STL TAF. Light surface wind should become mainly s-swly Saturday afternoon. GKS && .PRELIMINARY POINT TEMPS/POPS: Saint Louis 74 92 74 90 / 10 20 40 30 Quincy 69 89 70 89 / 10 40 40 40 Columbia 70 91 71 88 / 10 20 30 30 Jefferson City 71 92 70 89 / 10 20 30 30 Salem 72 89 69 88 / 10 20 30 30 Farmington 69 90 69 88 / 10 20 20 30 && .LSX WATCHES/WARNINGS/ADVISORIES: MO...NONE. IL...NONE. && WFO LSX
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 441 AM CDT FRI JUN 20 2014 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-210945- 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- 441 AM CDT FRI JUN 20 2014 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 TODAY. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THERE IS A CHANCE FOR THUNDERSTORMS SATURDAY THROUGH THURSDAY. A FEW OF THE STORMS ON SATURDAY AFTERNOON AND EVENING COULD BE SEVERE PRODUCING DAMAGING WINDS AND LARGE HAIL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT. GLASS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 612 PM CDT FRI JUN 20 2014 ILZ099-100-MOZ061-063-210000- JERSEY IL-MADISON IL-ST. CHARLES MO-ST. LOUIS MO- 612 PM CDT FRI JUN 20 2014 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN ST. LOUIS... NORTHEASTERN ST. CHARLES...NORTHWESTERN MADISON AND SOUTHERN JERSEY COUNTIES UNTIL 700 PM CDT... AT 609 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR GRAFTON...OR 8 MILES SOUTHWEST OF JERSEYVILLE...MOVING SOUTHEAST AT 25 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... GODFREY... FLORISSANT... BLACK JACK... ALTON... SPANISH LAKE... ORCHARD FARMS... ELSAH... PORTAGE DES SIOUX... WEST ALTON... THIS STORM WILL AFFECT CONFLUENCE STATE PARK AND PERE MARQUETTE STATE PARK. GOSSELIN
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
625 PM CDT FRI JUN 20 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0620 PM TSTM WND GST GRAFTON 38.97N 90.43W
06/20/2014 E40 MPH JERSEY IL TRAINED SPOTTER
HEAVY RAIN REPORTED WITH VERY SMALL HAIL - SIZE
UNKNOWN.
&&
DYEPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
700 PM CDT FRI JUN 20 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0641 PM TSTM WND GST 4 NNE ORCHARD FARMS 38.93N 90.42W
06/20/2014 M47 MPH ST. CHARLES MO ASOS
&&
GOSSELINSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 703 PM CDT FRI JUN 20 2014 MOZ063-064-210045- ST. LOUIS MO-ST. LOUIS CITY MO- 703 PM CDT FRI JUN 20 2014 ...SIGNIFICANT WEATHER ADVISORY FOR ST. LOUIS CITY AND CENTRAL ST. LOUIS COUNTIES UNTIL 745 PM CDT... AT 659 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR OVERLAND...MOVING SOUTHEAST AT 10 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... UNIVERSITY CITY... WARSON WOODS... KIRKWOOD... NORTHWOODS... HILLSDALE... FENTON... CLAYTON... GLENDALE... BRENTWOOD... RICHMOND HEIGHTS... THIS STORM WILL AFFECT SCOTT JOPLIN HISTORIC SITE. THIS STORM WILL ALSO IMPACT... INTERSTATE 44 FROM EXIT 276 TO EXIT 277. GOSSELIN
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
706 PM CDT FRI JUN 20 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0701 PM TSTM WND GST UNIVERSITY CITY 38.67N 90.33W
06/20/2014 E57 MPH ST. LOUIS MO TRAINED SPOTTER
&&
DYESPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 725 PM CDT FRI JUN 20 2014 ILZ100-101-210100- MADISON IL-ST. CLAIR IL- 725 PM CDT FRI JUN 20 2014 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN ST. CLAIR AND SOUTHERN MADISON COUNTIES UNTIL 800 PM CDT... AT 723 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR GLEN CARBON...MOVING SOUTHEAST AT 15 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... FAIRVIEW HEIGHTS... TROY... BELLEVILLE... SWANSEA... O'FALLON... SHILOH... HIGHLAND... LEBANON... SCOTT AFB... MASCOUTAH... THIS STORM WILL AFFECT HORSESHOE LAKE STATE PARK. THIS STORM WILL ALSO IMPACT... INTERSTATE 70 IN ILLINOIS FROM EXIT 21 TO EXIT 30. INTERSTATE 55 IN ILLINOIS NEAR EXIT 23. INTERSTATE 64 IN ILLINOIS FROM EXIT 9 TO EXIT 23. GOSSELIN
The St Louis radar (KLSX), 74 km away, was scanning. The volume nearest the first event began at 00:38 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds blew down about 20 power poles along U.S. 40 between Illinois Route 162 and Triad Middle School. Also, several power poles were blown down in St. Jacob.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2014Every state in 2014This day in weather historyWarnings in Illinois, June 2014
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: 532123.