Alert archive / Illinois / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 34, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 6, 1993, 7:59 PM CDT for Monroe County, Saint Clair County, Illinois. It was in force for 61 min.
The area
The counties it named.
The facts
- Issued
- May 6, 1993, 7:59 PM CDT (00:59 UTC)
- Expired
- May 6, 1993, 9:00 PM CDT
- In force
- 61 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Monroe County, IL, Saint Clair County, IL
The nearest sounding before it
Paducah/Barkley, KY (KPAH), launched 00:00Z, 1.0 hours before the alert went out and 188 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 5:22 PM CDT, 2 hours 37 minutes before
ILZ011-012-062330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 522 PM CDT THU MAY 6 1993 ...STRONG THUNDERSTORMS OCCURRING OVER PARTS OF SOUTH CENTRAL ILLINOIS... AT 520 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OCCURRING OVER SOUTH CENTRAL ILLINOIS...ABOUT 25 MILES WEST OF EFFINGHAM. THESE STORMS HAVE BEEN DRIFTING SOUTH AT 5 TO 10 MILES AN HOUR. WHILE NO SEVERE WEATHER HAS BEEN REPORTED WITH THESE STORMS AS OF 515 PM...THEY WERE PRODUCING SMALL HAIL AND EXTREMELY HEAVY RAINS. THESE CONDITIONS CAN BE EXPECTED IN AREAS BETWEEN EFFINGHAM AND VANDALIA BETWEEN 520 AND 6 PM THIS EVENING. FURTHER INTENSIFICATION OF THESE STORMS IS ALSO POSSIBLE...AND A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF SOUTHWEST AND PARTS OF SOUTH CENTRAL ILLINOIS UNTIL 10 PM. TRUETT &
Special weather statement, May 6, 5:22 PM CDT, 2 hours 37 minutes before
ILZ011-012-062330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 522 PM CDT THU MAY 6 1993 ...STRONG THUNDERSTORMS OCCURRING OVER PARTS OF SOUTH CENTRAL ILLINOIS... AT 520 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OCCURRING OVER SOUTH CENTRAL ILLINOIS...ABOUT 25 MILES WEST OF EFFINGHAM. THESE STORMS HAVE BEEN DRIFTING SOUTH AT 5 TO 10 MILES AN HOUR. WHILE NO SEVERE WEATHER HAS BEEN REPORTED WITH THESE STORMS AS OF 515 PM...THEY WERE PRODUCING SMALL HAIL AND EXTREMELY HEAVY RAINS. THESE CONDITIONS CAN BE EXPECTED IN AREAS BETWEEN EFFINGHAM AND VANDALIA BETWEEN 520 AND 6 PM THIS EVENING. FURTHER INTENSIFICATION OF THESE STORMS IS ALSO POSSIBLE...AND A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF SOUTHWEST AND PARTS OF SOUTH CENTRAL ILLINOIS UNTIL 10 PM. TRUETT &
Special weather statement, May 6, 6:15 PM CDT, 1 hour 44 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, 6:15 PM CDT, 1 hour 44 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, 29 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, 29 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
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 | Saint Louis | 45 min |
| May 6, 8:52 PM CDT | Flash Flood Warning | LSX | Monroe, Saint Clair | 3 hr |
| May 6, 9:00 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 60 min |
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.