Alert archive / Illinois / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 112, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 1, 1999, 8:03 PM CDT for Montgomery County, Illinois. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 1, 1999, 8:03 PM CDT (01:03 UTC)
- Expired
- Jun 1, 1999, 8:50 PM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Montgomery County, IL
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 1, 4:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 1.1 hours before the alert went out and 127 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
- 1323 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 945 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 162 m²/s²
- 0-3 km storm-relative helicity
- 315 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 7.0
The text
As transmitted, in the capitals the NWS used until 2016.
157 WUUS1 KSTL 020104 RRA SVRSTL ILC135-020150- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 803 PM CDT TUE JUN 1 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN MONTGOMERY COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS * UNTIL 850 PM CDT * AT 801 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 8 MILES NORTHWEST OF LITCHFIELD... MOVING NORTHEAST AT 30 MPH. * LOCATIONS THAT WILL BE AFFECTED... FARMERSVILLE RAYMOND SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND GUSTS IN EXCESS OF 60 MPH...DAMAGING HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OR YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. FG/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, Jun 1, 7:14 PM CDT, 49 minutes before
ILZ095>097-MOZ009-010-018-019-026-027-034>036-041-042-047-048- 050>052-060-020315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 714 PM CDT TUE JUN 1 1999 ...TORNADO WATCH 351 FOR PORTION OF CENTRAL...EAST CENTRAL AND MOST OF NORTHEAST MISSOURI HAS BEEN CANCEL... CITIES IN THIS WATCH WERE COLUMBIA...QUINCY...HANNIBAL...MEXICO...PALMYRA AND TROY. WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WERE STILL PRESENT ACROSS THE AREA THIS EVENING. AT THIS TIME SEVERE STORMS HAVE MOVED TO THE SOUTHEAST AND WILL NOT EFFECT THE AREA ANY LONGER THIS EVENING. HOWEVER...STAY TUNE WITH NOAA WEATHER RADIO IN ORDER TO BE INFORM WITH OUR CURRENT WEATHER SITUATION.
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 7:39 PM CDT | Tornado Warning | LSX | Macoupin | 46 min |
| Jun 1, 7:43 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 47 min |
| Jun 1, 8:05 PM CDT | Severe Thunderstorm Warning | LSX | Fayette | 35 min |
| Jun 1, 8:07 PM CDT | Tornado Warning | LSX | Fayette | 33 min |
| Jun 1, 8:09 PM CDT | Tornado Warning | LSX | Montgomery | 36 min |
| Jun 1, 8:49 PM CDT | 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; the sounding from the Mesonet's radiosonde archive.