Alert archive / Illinois / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 35, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 6, 1993, 9:00 PM CDT for Saint Clair County, Illinois. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- May 6, 1993, 9:00 PM CDT (02:00 UTC)
- Expired
- May 6, 1993, 10:00 PM CDT
- In force
- 60 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Saint Clair County, IL
The nearest sounding before it
Paducah/Barkley, KY (KPAH), launched 00:00Z, 2.0 hours before the alert went out and 189 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 495 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 1641 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 070201 SVRSTL ILC163-070300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 900 PM CDT THU MAY 6 1993 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1000 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHWEST ILLINOIS ...SOUTHERN ST CLAIR COUNTY AT 859 PM...WEATHER SERVICE RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM OVER SOUTHERN ST CLAIR COUNTY NEAR SMITHTON. THIS IS ABOUT 25 MILES SOUTHEAST OF ST LOUIS. THE STORM WAS DRIFTING EAST-SOUTHEAST...AT 5 TO 10 MILES AN HOUR...AND WILL BE AFFECTING THE CITIES OF NEW ATHENS AND LENZBURG. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. TRUETT/GLASS
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, May 6, 6:15 PM CDT, 2 hours 45 minutes before
ILZ011-012-070015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 615 PM CDT THU MAY 6 1993 ...STRONG THUNDERSTORMS CONTINUE OVER SOUTH CENTRAL ILLINOIS... STRONG THUNDERSTORMS CONTINUED OVER PARTS OF SOUTH CENTRAL ILLINOIS THIS EVENING. AT 615 PM...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE STRONGEST STORMS WERE ALONG THE CLAY...MARION COUNTY LINE...OR ABOUT 10 TO 30 MILES SOUTH OF EFFINGHAM. ALTHOUGH NO SEVERE WEATHER HAS BEEN REPORTED WITH THESE STORMS...EXTREMELY HEAVY RAINS AND SOME SMALL HAIL CAN BE EXPECTED AS THE STORMS DRIFT SOUTHEAST AT 10 TO 20 MILES AN HOUR. FROM 615 TO 7 PM...IT APPEARS THAT THE STRONGEST STORMS WILL REMAIN SOUTH OF EFFINGHAM.|..AND EAST OF SALEM. TRUETT/GLASS
Special weather statement, May 6, 7:30 PM CDT, 1 hour 30 minutes before
MOZ003-007-011-070130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 730 PM CDT THU MAY 6 1993 ...A SEVERE THUNDERSTORM WATCH CONTINUES FOR MUCH OF EASTERN MISSOURI AND SOUTHWEST ILLINOIS UNTIL 10 PM... AT 730 PM...WEATHER SERVICE RADAR INDICATED SCATTERED THUNDERSTORMS OCCURRING THROUGHOUT EASTERN MISSOURI AND SOUTHWEST ILLINOIS. THE STORMS WERE SCATTERED ALONG THE MISSISSIPPI RIVER...FROM THE EXTREME NORTHEAST TIP OF MISSOURI....ABOUT 40 MILES NORTHWEST OF QUINCY...TO NEAR ST LOUIS. THE STRONGEST STORMS WERE OCCURRING IN THE ST LOUIS AREA...FROM ABOUT 45 MILES NORTH OF ST LOUIS...TO JUST SOUTHEAST OF ST LOUIS. IN NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS...MOST OF THE STORMS WERE NOT PARTICUALRY STRONG. CONDITIONS REMAIN FAVORABLE FOR SEVERE WEATHER DEVELOPMENT THROUGHOUT MUCH OF THE BI-STATE AREA...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM. TRUETT
Special weather statement, May 6, 7:30 PM CDT, 1 hour 30 minutes before
MOZ003-007-011-070130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 730 PM CDT THU MAY 6 1993 ...A SEVERE THUNDERSTORM WATCH CONTINUES FOR MUCH OF EASTERN MISSOURI AND SOUTHWEST ILLINOIS UNTIL 10 PM... AT 730 PM...WEATHER SERVICE RADAR INDICATED SCATTERED THUNDERSTORMS OCCURRING THROUGHOUT EASTERN MISSOURI AND SOUTHWEST ILLINOIS. THE STORMS WERE SCATTERED ALONG THE MISSISSIPPI RIVER...FROM THE EXTREME NORTHEAST TIP OF MISSOURI....ABOUT 40 MILES NORTHWEST OF QUINCY...TO NEAR ST LOUIS. THE STRONGEST STORMS WERE OCCURRING IN THE ST LOUIS AREA...FROM ABOUT 45 MILES NORTH OF ST LOUIS...TO JUST SOUTHEAST OF ST LOUIS. IN NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS...MOST OF THE STORMS WERE NOT PARTICUALRY STRONG. CONDITIONS REMAIN FAVORABLE FOR SEVERE WEATHER DEVELOPMENT THROUGHOUT MUCH OF THE BI-STATE AREA...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM. TRUETT
Special weather statement, May 6, 8:44 PM CDT, 16 minutes before
MOZ003-007-011-012-022-023-070245- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 844 PM CDT THU MAY 6 1993 ...SEVERE THUNDERSTORM WATCH FOR EASTERN MISSOURI HAS BEEN CANCELLED... THE SEVERE THUNDERSTORM WATCH FOR EASTERN MISSOURI HAS BEEN CANCELLED. WHILE THERE WILL BE A CHANCE OF ADDITIONAL THUNDERSTORM DEVELOPMENT OVER EASTERN MISSOURI LATER TONIGHT...THE THREAT OF SEVERE WEATHER HAS ENDED FOR THE TIME BEING. HOWEVER..A| TORNADO WATCH CONTINUES FOR WEST CENTRAL AND NORTHWEST SECTIONS OF MISSOURI UNTIL 11 PM. NOTE TO BROADCASTERS...ZONE FORECASTS ISSUED BETWEEN 9 AND 930 PM WILL REFLECT THE LATEST INFORMATION ON WATCHES. FERRY/TRUETT
Special weather statement, May 6, 8:44 PM CDT, 16 minutes before
MOZALL-070245- SPECIAL WEATHER STATEMENT...CORRECTED FOR CODING NATIONAL WEATHER SERVICE ST LOUIS MO 844 PM CDT THU MAY 6 1993 ...SEVERE THUNDERSTORM WATCH FOR EASTERN MISSOURI HAS BEEN CANCELLED... THE SEVERE THUNDERSTORM WATCH FOR EASTERN MISSOURI HAS BEEN CANCELLED. WHILE THERE WILL BE A CHANCE OF ADDITIONAL THUNDERSTORM DEVELOPMENT OVER EASTERN MISSOURI LATER TONIGHT...THE THREAT OF SEVERE WEATHER HAS ENDED FOR THE TIME BEING. HOWEVER..A TORNADO WATCH CONTINUES FOR WEST CENTRAL AND NORTHWEST SECTIONS OF MISSOURI UNTIL 11 PM. NOTE TO BROADCASTERS...ZONE FORECASTS ISSUED BETWEEN 9 AND 930 PM WILL REFLECT THE LATEST INFORMATION ON WATCHES. FERRY/TRUETT
Special weather statement, May 6, 8:50 PM CDT, 10 minutes before
MOZALL-070245- SPECIAL WEATHER STATEMENT...CORRECTED FOR CODING NATIONAL WEATHER SERVICE ST LOUIS MO 844 PM CDT THU MAY 6 1993 ...SEVERE THUNDERSTORM WATCH FOR EASTERN MISSOURI HAS BEEN CANCELLED... THE SEVERE THUNDERSTORM WATCH FOR EASTERN MISSOURI HAS BEEN CANCELLED. WHILE THERE WILL BE A CHANCE OF ADDITIONAL THUNDERSTORM DEVELOPMENT OVER EASTERN MISSOURI LATER TONIGHT...THE THREAT OF SEVERE WEATHER HAS ENDED FOR THE TIME BEING. HOWEVER..A TORNADO WATCH CONTINUES FOR WEST CENTRAL AND NORTHWEST SECTIONS OF MISSOURI UNTIL 11 PM. NOTE TO BROADCASTERS...ZONE FORECASTS ISSUED BETWEEN 9 AND 930 PM WILL REFLECT THE LATEST INFORMATION ON WATCHES. FERRY/TRUETT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 7:15 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 45 min |
| May 6, 7:59 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 61 min |
| May 6, 8:52 PM CDT | Flash Flood Warning | LSX | Monroe, Saint Clair | 3 hr |
Nearby
Severe Thunderstorm Warnings in Illinois, 1993Every severe thunderstorm warning in 1993
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.