Alert archive / Illinois / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 158, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 22, 1998, 10:25 PM CDT for Montgomery County, Illinois. It was in force for 30 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
- May 22, 1998, 10:25 PM CDT (03:25 UTC)
- Expired
- May 22, 1998, 10:55 PM CDT
- In force
- 30 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Montgomery County, IL
The radar
The Lincoln radar (KILX), 103 km from the middle of the area, began a volume at 03:25 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 |
|---|---|---|---|
| May 22, 5:30 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 3.4 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
- 5 J/kg
- Mixed-layer CIN
- -616 J/kg
- Mixed-layer LCL
- 570 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 257 m²/s²
- 0-3 km storm-relative helicity
- 430 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 230325 RRA SVRSTL ILC135-230355- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1025 PM CDT FRI MAY 22 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN MONTGOMERY COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS * UNTIL 1055 PM CDT * AT 1024 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES WEST OF NAKOMIS IN NORTHEAST MONTGOMERY COUNTY... MOVING EAST AT 35 MPH. * LOCATIONS THAT WILL BE AFFECTED... NOKOMIS OHLMAN GOLFBALL HAIL WAS REPORTED NEAR NOKOMIS AT 1020 PM. THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING HAIL. LARGE HAIL CAN CAUSE, EXTENSIVE PROPERTY DAMAGE AN SERIOUS INJURY TO PEOPLE CAUGHT OUTDOORS. MOVE INSIDE A STURDY BUILDING IMMEDIATELY. DLF/GL &
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 22, 7:16 PM CDT, 3 hours 9 minutes before
ILZ058>060-064-065-069-070-074-079-098>102-MOZ036-041-042-047>052- 059>065-072>075-084-085-099-230315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 716 PM CDT FRI MAY 22 1998 ...TORNADO WATCH 397 REMAINS IN EFFECT UNTIL 11 PM CDT... AT 710 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SCATTERED SHOWERS AND A FEW THUNDERSTORMS DOTTING THE AREA. NONE OF THESE STORMS HAVE BEEN SEVERE IN THE PAST HOUR. KEEP IN MIND THAT ADDITIONAL THUNDERSTORMS COULD DEVELOP AT ANY TIME THROUGH THE NIGHT. IN FACT THE BEST CHANCE FOR SEVERE THUNDERSTORMS WILL BE LATER TONIGHT. KEEP ABREAST OF LOCAL DEVELOPMENTS THROUGH THE EVENING AS YOU GO ABOUT YOUR ACTIVITIES. PEDIGO
Special weather statement, May 22, 7:16 PM CDT, 3 hours 9 minutes before
ILZ058>060-064-065-069-070-074-079-098>102-MOZ036-041-042-047>052- 059>065-072>075-084-085-099-230315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 716 PM CDT FRI MAY 22 1998 ...TORNADO WATCH 397 REMAINS IN EFFECT UNTIL 11 PM CDT... AT 710 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SCATTERED SHOWERS AND A FEW THUNDERSTORMS DOTTING THE AREA. NONE OF THESE STORMS HAVE BEEN SEVERE IN THE PAST HOUR. KEEP IN MIND THAT ADDITIONAL THUNDERSTORMS COULD DEVELOP AT ANY TIME THROUGH THE NIGHT. IN FACT THE BEST CHANCE FOR SEVERE THUNDERSTORMS WILL BE LATER TONIGHT. KEEP ABREAST OF LOCAL DEVELOPMENTS THROUGH THE EVENING AS YOU GO ABOUT YOUR ACTIVITIES. PEDIGO
Special weather statement, May 22, 9:55 PM CDT, 30 minutes before
ILZ058>060-064-065-069-070-074-079-098>102-MOZ036-042-048>052- 059>065-072>075-084-085-099-230500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 955 PM CDT FRI MAY 22 1998 ...TORNADO WATCH 397 HAS BEEN CANCELLED... THOUGH THE AIR IS EXTREMELY UNSTABLE ACROSS EASTERN MISSOURI AND SOUTHWEST ILLINOIS...THE IMMEDIATE THREAT FOR SEVERE THUNDERSTORMS HAS ENDED...THEREFORE THE TORNADO WATCH HAS BEEN CANCELLED FOR ALL COUNTIES INVOLVED IN THE ST LOUIS AREA OF RESPONSIBILITY. KEEP IN MIND THAT ADDITIONAL THUNDERSTORMS COULD DEVELOP AT ANY TIME THROUGH THE NIGHT. IN FACT THE BEST CHANCE FOR SEVERE THUNDERSTORMS WILL BE TOWARD MORNING. KEEP ABREAST OF LOCAL DEVELOPMENTS THROUGH THE NIGHT AND LISTEN FOR POSSIBLE LATER STATEMENTS OR WARNINGS. PEDIGO
Special weather statement, May 22, 9:55 PM CDT, 30 minutes before
ILZ058>060-064-065-069-070-074-079-098>102-MOZ036-042-048>052- 059>065-072>075-084-085-099-230500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 955 PM CDT FRI MAY 22 1998 ...TORNADO WATCH 397 HAS BEEN CANCELLED... THOUGH THE AIR IS EXTREMELY UNSTABLE ACROSS EASTERN MISSOURI AND SOUTHWEST ILLINOIS...THE IMMEDIATE THREAT FOR SEVERE THUNDERSTORMS HAS ENDED...THEREFORE THE TORNADO WATCH HAS BEEN CANCELLED FOR ALL COUNTIES INVOLVED IN THE ST LOUIS AREA OF RESPONSIBILITY. KEEP IN MIND THAT ADDITIONAL THUNDERSTORMS COULD DEVELOP AT ANY TIME THROUGH THE NIGHT. IN FACT THE BEST CHANCE FOR SEVERE THUNDERSTORMS WILL BE TOWARD MORNING. KEEP ABREAST OF LOCAL DEVELOPMENTS THROUGH THE NIGHT AND LISTEN FOR POSSIBLE LATER STATEMENTS OR WARNINGS. PEDIGO
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 6:09 PM CDT | Tornado Warning | LSX | Monroe, Saint Clair | 51 min |
| May 23, 6:16 PM CDT | Tornado Warning | LSX | Madison | 49 min |
| May 23, 6:31 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Jersey | 49 min |
| May 23, 6:37 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 33 min |
| May 23, 6:50 PM CDT | Tornado Warning | LSX | Greene | 50 min |
| May 23, 6:53 PM CDT | Severe Thunderstorm Warning | LSX | Clinton | 47 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.