Alert archive / Illinois / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 31, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Feb 11, 1999, 4:37 PM CST for Marion County, Illinois. It was in force for 48 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Feb 11, 1999, 4:37 PM CST (22:37 UTC)
- Expired
- Feb 11, 1999, 5:25 PM CST
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Marion County, IL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 11, 4:45 PM CST | Thunderstorm Wind 55 | Centralia, IL | |
| Feb 11, 5:00 PM CST | Thunderstorm Wind 60 | Salem, IL | |
| Feb 11, 5:05 PM CST | Thunderstorm Wind 60 | Salem, IL |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 11, 2:30 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.6 hours before the alert went out and 169 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
- 394 J/kg
- Mixed-layer CIN
- -231 J/kg
- Mixed-layer LCL
- 746 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 293 m²/s²
- 0-3 km storm-relative helicity
- 310 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 112236 SVRSTL ILC121-112325- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 437 PM CST THU FEB 11 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MARION COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS * UNTIL 525 PM CST * AT 435 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM VERNON TO ASHLAND... MOVING EAST AT 45 MPH. * LOCATIONS THAT WILL BE AFFECTED... SALEM KINMUNDY OMEGA CARTTER THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING WINDS. MOVE QUICKLY TO A STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS. A TORNADO WATCH IS ALS4O IN EFFECT FOR THE WARNED AREA. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. GKS/RP
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, Feb 11, 1:51 PM CST, 2 hours 46 minutes before
MOZ009-010-018-019-026-027-034-041-042-047>050-112054- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 151 PM CST THU FEB 11 1999 SEVERE THUNDERSTORM WATCH NUMBER 45 HAS BEEN CANCELLED FOR, THE FOLLOWING COUNTIES IN MISSOURI... SCOTLAND...CLARK...KNOX...LEWIS...SHELBY...MARION...MONROE... AUDRAIN...BOONE...CALLAWAY...MONITEAU...COLE...OSAGE THE SEVERE THUNDERSTORMS HAVE MOVED EAST OF THESE COUNTIES. SDT
Special weather statement, Feb 11, 3:25 PM CST, 1 hour 12 minutes before
ILZ095>097-MOZ035-036-051-052-059-060-062-072-073-112200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 325 PM CST THU FEB 11 1999 SEVERE THUNDERSTORM WATCH 47 IS NO LONGER IN EFFECT FOR PARTS OF NORTHEAST...EAST CENTRAL...AND SOUTHEAST MISSOURI...AND A SMALL PART OF WEST CENTRAL ILLINOIS. THE FOLLOWING COUNTIES HAVE BEEN CLEARED FROM THE WATCH... IN ILLINOIS... ADAMS...BROWN...PIKE...INCLUDING THE CITY OF QUINCY IN MISSOURI... RALLS...PIKE...LINCOLN...MONTGOMERY...WARREN....GASCONADE... FRANKLIN...CRAWFORD....AND WASHINGTON...INCLUDING THE TOWNS OF STEELVILLE.....SULLIVAN...WASHINGTON...WARRENTON...AND TROY. TRUETT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 11, 12:22 PM CST | Severe Thunderstorm Warning | LSX | Adams | 48 min |
| Feb 11, 1:54 PM CST | Tornado Warning | LSX | Brown | 46 min |
| Feb 11, 1:56 PM CST | Tornado Warning | LSX | Calhoun | 49 min |
| Feb 11, 2:09 PM CST | Tornado Warning | LSX | Greene | 51 min |
| Feb 11, 2:12 PM CST | Tornado Warning | LSX | Pike | 48 min |
| Feb 11, 2:47 PM CST | Severe Thunderstorm Warning | LSX | Madison | 48 min |
| Feb 11, 4:24 PM CST | Severe Thunderstorm Warning | LSX | Fayette | 51 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.