Alert archive / Illinois / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 149, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 17, 1993, 6:10 PM CDT for Effingham County, Illinois. It was in force for 50 min.
The area
The counties it named.
The facts
- Issued
- Aug 17, 1993, 6:10 PM CDT (23:10 UTC)
- Expired
- Aug 17, 1993, 7:00 PM CDT
- In force
- 50 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Effingham County, IL
The nearest sounding before it
Paducah/Barkley, KY (KPAH), launched 12:00Z, 11.2 hours before the alert went out and 221 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
- 1188 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1127 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 71 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 172311 SVRSTL ILC049-180000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 610 PM CDT TUE AUG 17 1993 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 700 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL ILLINOIS ...EFFINGHAM COUNTY AT 610 PM..WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM NEAR EFFINGHAM. THE STORM WAS DRIFTING SOUTH AT 5 TO 10 MILES AN HOUR...AND WILL BE AFFECTING THE CITIES OF EFFINGHAM...HEARTVILLE....AND WATSON. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAI$N. 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.
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, Aug 17, 5:51 PM CDT, 19 minutes before
ILZ012-180000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 551 PM CDT TUE AUG 17 1993 ...RAPIDLY DEVELOPING THUNDERSTORMS OVER SOUTHEAST ILLINOIS... AT 550 PM...WEATHER SERVICE RADAR INDICATED A RAPIDLY DEVELOPING THUNDERSTORM NEAR EFFINGHAM. ANOTHER THUNDERSTORM WAS ALSO ABOUT 10 MILES NORTH OF EFFINGHAM. BOTH OF THESE STORMS WERE DRIFTING SOUTH AT 10 MILES AN HOUR...AND WILL PRODUCE EXTREMELY HEAVY RAINS AND POSSIBLY SOME SMALL HAIL IN THE EFFINGHAM AREA BETWEEN 550 PM AND 630 PM THIS EVENING. IN ADDITION...DRIVERS NEAR THE JUNCTIONS OF INTERSTATES 57 AND 70 SHOULD USE CAUTION...AS HEAVY RAINS WILL BE PRODUCING POOR VISIBILITIES. TRUETT
Special weather statement, Aug 17, 5:52 PM CDT, 18 minutes before
ILZ012-180000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 551 PM CDT TUE AUG 17 1993 ...RAPIDLY DEVELOPING THUNDERSTORMS OVER SOUTHEAST ILLINOIS... AT 550 PM...WEATHER SERVICE RADAR INDICATED A RAPIDLY DEVELOPING THUNDERSTORM NEAR EFFINGHAM. ANOTHER THUNDERSTORM WAS ALSO ABOUT 10 MILES NORTH OF EFFINGHAM. BOTH OF THESE STORMS WERE DRIFTING SOUTH AT 10 MILES AN HOUR...AND WILL PRODUCE EXTREMELY HEAVY RAINS AND POSSIBLY SOME SMALL HAIL IN THE EFFINGHAM AREA BETWEEN 550 PM AND 630 PM THIS EVENING. IN ADDITION...DRIVERS NEAR THE JUNCTIONS OF INTERSTATES 57 AND 70 SHOULD USE CAUTION...AS HEAVY RAINS WILL BE PRODUCING POOR VISIBILITIES. TRUETT
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.