Alert archive / Illinois / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 52, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 13, 1998, 7:35 PM CDT for Randolph County, Illinois. It was in force for 40 min. 2 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
- Apr 13, 1998, 7:35 PM CDT (00:35 UTC)
- Expired
- Apr 13, 1998, 8:15 PM CDT
- In force
- 40 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Randolph County, IL
The radar
The St Louis radar (KLSX), 104 km from the middle of the area, began a volume at 00:36 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 13, 7:46 PM CDT | Hail 0.75 | Steeleville, IL | |
| Apr 13, 7:53 PM CDT | Hail 1 | Steeleville, 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 |
|---|---|---|---|
| Apr 13, 1:45 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 13, 6:30 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.6 hours before the alert went out and 256 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
- 406 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 531 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 172 m²/s²
- 0-3 km storm-relative helicity
- 224 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
301 WUUS1 KSTL 140036 RRA SVRSTL ILC157-140115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 735 PM CDT MON APR 13 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 815 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHWEST ILLINOIS ...SOUTHERN RANDOLPH COUNTY AT 735 PM...RADAR INDICATED SEVERE THUNDERSTORMS EXTENDING FROM JUST SOUTH OF SPARTA TO NEAR ROOTS. THE STORMS WERE MOVING EAST AT 20 MPH. TOWNS IN THE PATH OF THESE STORMS ARE ELLIS GROVE...STEELEVILLE AND BLAIR. REMEMBER...A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. IF OUTDOORS...SEEK INSIDE SHELTER IMMEDIATELY. STAY AWAY FROM WINDOWS.
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, Apr 13, 4:20 PM CDT, 3 hours 15 minutes before
MOZ026-027-034>036-041-042-047>052-059-060-062-132315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 420 PM CDT MON APR 13 1998 SEVERE THUNDERSTORM WATCH NUMBER 203 VALID UNTIL 500 PM HAS BEEN CANCELLED AND REPLACED BY TORNADO WATCH NUMBER 205 VALID UNTIL 900 PM. THE SEVERE THUNDERSTORM WATCH IS CANCELLED AND REPLACED BY A TORNADO WATCH FOR THE FOLLOWING COUNTIES: SHELBY MARION MONROE RALLS PIKE AUDRAIN BOONE CALLAWAY MONTGOMERY WARREN LINCOLN MONITEAU COLE OSAGE GASCONADE FRANKIN SEVERE THUNDERSTORMS ARE OCCURRING IN THE WATCH AREA AT THIS TIME. STAY TUNED TO YOUR RADIO OR TELEVISION OR NOAA WEATHER RADIO FOR THE LATEST ADVISORIES AND STATEMENTS. WDB
Special weather statement, Apr 13, 4:20 PM CDT, 3 hours 15 minutes before
MOZ026-027-034>036-041-042-047>052-059-060-062-132315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 420 PM CDT MON APR 13 1998 SEVERE THUNDERSTORM WATCH NUMBER 203 VALID UNTIL 500 PM HAS BEEN CANCELLED AND REPLACED BY TORNADO WATCH NUMBER 205 VALID UNTIL 900 PM. THE SEVERE THUNDERSTORM WATCH IS CANCELLED AND REPLACED BY A TORNADO WATCH FOR THE FOLLOWING COUNTIES: SHELBY MARION MONROE RALLS PIKE AUDRAIN BOONE CALLAWAY MONTGOMERY WARREN LINCOLN MONITEAU COLE OSAGE GASCONADE FRANKIN SEVERE THUNDERSTORMS ARE OCCURRING IN THE WATCH AREA AT THIS TIME. STAY TUNED TO YOUR RADIO OR TELEVISION OR NOAA WEATHER RADIO FOR THE LATEST ADVISORIES AND STATEMENTS. WDB
Special weather statement, Apr 13, 6:58 PM CDT, 37 minutes before
ILZ064-069-065-100-070-102-060-079-101-074-MOZ085-075-074-064-140200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 658 PM CDT MON APR 13 1998 TORNADO WATCHES NUMBER 204 AND 205 HAVE BEEN CANCELLED AND REPLACED BY TORNADO WATCH NUMBER 206. TORNADO WATCH NUMBER 206 IS IN EFFECT UNTIL 1100 PM CDT THIS MONDAY EVENING. ILLINOIS COUNTIES INCLUDED IN TORNADO WATCH NUMBER 206 ARE MONTGOMERY...BOND...FAYETTE...MARION...CLINTON...WASHINGTON... RANDOLPH...MONROE...ST CLAIR...AND MADISON COUNTIES. MISSOURI COUNTIES INCLUDED IN TORNADO WATCH NUMBER 206 ARE STE GENEVIEVE...ST FRANCOIS...AND MADISON COUNTIES. SEVERE THUNDERSTORMS ARE OCCURRING IN THE WATCH AREA. STAY TUNED TO TV OR RADIO OR THE NOAA WEATHER RADIO FOR THE LATEST WATCHES...STATEMENTS AND UPDATES. WDB
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 7:45 PM CDT | Tornado Warning | LSX | Washington | 45 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.