Alert archive / Illinois / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 329, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Oct 29, 1998, 6:27 PM CST for Macoupin County, Illinois. It was in force for 48 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
- Oct 29, 1998, 6:27 PM CST (00:27 UTC)
- Expired
- Oct 29, 1998, 7:15 PM CST
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Macoupin County, IL
The radar
The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 00:28 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 29, 3:15 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.5 hours before the alert went out and 150 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
- 629 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 912 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 300027 SVRSTL ILC117-300115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 627 PM CST THU OCT 29 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MACOUPIN COUNTY IN SOUTHWESTERN ILLINOIS * UNTIL 715 PM CST * AT 623 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM MACOUPIN-GREENE COUNTY LINE...JUST EAST OF GREENFIELD... MOVING EAST AT 30 MPH. * LOCATIONS THAT WILL BE AFFECTED... HAGGAMAN READER HETTICK CHESTERFIELD CARLINVILLE THIS STORM PRODUCED 3/4 INCH HAIL IN GREENE COUNTY. 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. CA/JK &
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, Oct 29, 5:20 PM CST, 1 hour 7 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026- 027-034>036-041-042-047>052-059>065-072>075-084-085-099-300015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 520 PM CST THU OCT 29 1998 THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR PORTIONS OF NORTHEAST AND CENTRAL MISSOURI AND WEST CENTRAL ILLINOIS. THE FOLLOWING COUNTIES ARE NO LONGER IN THE WATCH... IN ILLINOIS... BROWN ADAMS IN MISSOU6RI... MARION RALLS MONROE AUDRAIN CALLAWAY COLE .END
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 29, 6:44 PM CST | Severe Thunderstorm Warning | LSX | Montgomery | 61 min |
| Oct 29, 7:19 PM CST | Severe Thunderstorm Warning | LSX | Macoupin | 31 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1998Every severe thunderstorm warning in 1998
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; radar from the NEXRAD Level II archive.