Alert archive / Illinois / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 246, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 18, 1998, 9:49 PM CDT for Randolph County, Saint Clair County, Illinois. It was in force for 51 min. 4 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
- Jun 18, 1998, 9:49 PM CDT (02:49 UTC)
- Expired
- Jun 18, 1998, 10:40 PM CDT
- In force
- 51 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Randolph County, IL, Saint Clair County, IL
The radar
The St Louis radar (KLSX), 85 km from the middle of the area, began a volume at 02:51 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 |
|---|---|---|---|
| Jun 18, 10:04 PM CDT | Thunderstorm Wind 64 | Freeburg, IL | |
| Jun 18, 10:05 PM CDT | Thunderstorm Wind 61 | Prairie Du Rocher, IL | |
| Jun 18, 10:10 PM CDT | Thunderstorm Wind 60 | Mascoutah, IL | |
| Jun 18, 10:15 PM CDT | Thunderstorm Wind 61 | Sparta, 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 |
|---|---|---|---|
| Jun 18, 6:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 2.8 hours before the alert went out and 237 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
- 2675 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1092 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 219 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 17.5
The text
As transmitted, in the capitals the NWS used until 2016.
549 WUUS1 KSTL 190250 RRA SVRSTL ILC157-163-190335- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 949 PM CDT THU JUN 18 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... RANDOLPH COUNTY IN SOUTHWESTERN ILLINOIS ST CLAIR COUNTY IN SOUTHWESTERN ILLINOIS * UNTIL 1040 PM CDT * AT 949 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS JUST WEST OF WATERLOO TO NEAR FARMINGTON... MOVING EAST AT 40 MPH. * LOCATIONS THAT WILL BE AFFECTED... RED BUD PRAIRIE DU ROCHER MILLSTADT FREEBURG NEW ATHENS THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING WINDS. MOVE QUICKLY TO A STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS. GLASS/TRUETT
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 18, 6:24 PM CDT, 3 hours 25 minutes before
MOZ009-010-018-019-026-190130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 624 PM CDT THU JUN 18 1998 ...THE SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTHEAST MISSOURI HAS BEEN CANCELLED... THE SEVERE THUNDERSTORM WATCH FOR SCOTLAND...CLARK...KNOX...LEWIS AND SHELBY COUNTIES IN NORTHEAST MISSOURI IS NO LONGER IN EFFECT. THE SEVERE THUNDERSTORMS HAVE MOVED EAST OF THE AREA. FERRY
Special weather statement, Jun 18, 6:24 PM CDT, 3 hours 25 minutes before
MOZ009-010-018-019-026-190130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 624 PM CDT THU JUN 18 1998 ...THE SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTHEAST MISSOURI HAS BEEN CANCELLED... THE SEVERE THUNDERSTORM WATCH FOR SCOTLAND...CLARK...KNOX...LEWIS AND SHELBY COUNTIES IN NORTHEAST MISSOURI IS NO LONGER IN EFFECT. THE SEVERE THUNDERSTORMS HAVE MOVED EAST OF THE AREA. FERRY
Special weather statement, Jun 18, 8:20 PM CDT, 1 hour 29 minutes before
ILZ095>097-MOZ027-034>036-041-042-047-048-190315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 820 PM CDT THU JUN 18 1998 ...THE SEVERE THUNDERSTORM WATCHES FOR PARTS OF NORTHEAST AND CENTRAL MISSOURI AND WEST CENTRAL ILLINOIS HAS BEEN CANCELLED... THE SEVERE THUNDERSTORM WATCHES FOR MARION...MONROE...RALLS... PIKE...AUDRAIN...BOONE...MONITEAU AND COLE COUNTIES IN NORTHEAST AND CENTRAL MISSOURI AND THE WEST CENTRAL ILLINOIS COUNTIES OF ADAMS...BROWN AND PIKE IS NO LONGER IN EFFECT. THE LINE OF SEVERE THUNDERSTORMS HAVE MOVED EAST OF THE AREA. FERRY
Special weather statement, Jun 18, 8:20 PM CDT, 1 hour 29 minutes before
ILZ095>097-MOZ027-034>036-041-042-047-048-190315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 820 PM CDT THU JUN 18 1998 ...THE SEVERE THUNDERSTORM WATCHES FOR PARTS OF NORTHEAST AND CENTRAL MISSOURI AND WEST CENTRAL ILLINOIS HAS BEEN CANCELLED... THE SEVERE THUNDERSTORM WATCHES FOR MARION...MONROE...RALLS... PIKE...AUDRAIN...BOONE...MONITEAU AND COLE COUNTIES IN NORTHEAST AND CENTRAL MISSOURI AND THE WEST CENTRAL ILLINOIS COUNTIES OF ADAMS...BROWN AND PIKE IS NO LONGER IN EFFECT. THE LINE OF SEVERE THUNDERSTORMS HAVE MOVED EAST OF THE AREA. FERRY
Special weather statement, Jun 18, 9:35 PM CDT, 14 minutes before
ILZ058-059-098-099-MOZ049>052-060-061-190430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 935 PM CDT THU JUN 18 1998 ...THE SEVERE THUNDERSTORM WATCH FOR PARTS OF CENTRAL AND EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS IS NO LONGER IN EFFECT... THE SEVERE THUNDERSTORM WATCH FOR THE MISSOURI COUNTIES OF OSAGE...CALLOWAY...MONTGOMERY AND LINCOLN AND THE SOUTHWEST ILLINOIS COUNTIES OF CALHOUN...JERSEY...GREENE AND MACOUPIN HAS EXPIRED. MOST OF THE SHOWERS AND THUNDERSTORMS HAVE ENDED OVER THE AREA. HOWEVER...ISOLATED THUNDERSTORMS CONTINUED FROM LINCOLN COUNTY MISSOURI INTO MACOUPIN COUNTY ILLINOIS. WHILE THE SEVERE WEATHER THREAT HAS ENDED...THE STORMS IN MACOUPIN COUNTY WERE STILL CAPABLE OF PRODUCING VERY HEAVY RAINS. DLF
Special weather statement, Jun 18, 9:35 PM CDT, 14 minutes before
ILZ058-059-098-099-MOZ049>052-060-061-190430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 935 PM CDT THU JUN 18 1998 ...THE SEVERE THUNDERSTORM WATCH FOR PARTS OF CENTRAL AND EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS IS NO LONGER IN EFFECT... THE SEVERE THUNDERSTORM WATCH FOR THE MISSOURI COUNTIES OF OSAGE...CALLOWAY...MONTGOMERY AND LINCOLN AND THE SOUTHWEST ILLINOIS COUNTIES OF CALHOUN...JERSEY...GREENE AND MACOUPIN HAS EXPIRED. MOST OF THE SHOWERS AND THUNDERSTORMS HAVE ENDED OVER THE AREA. HOWEVER...ISOLATED THUNDERSTORMS CONTINUED FROM LINCOLN COUNTY MISSOURI INTO MACOUPIN COUNTY ILLINOIS. WHILE THE SEVERE WEATHER THREAT HAS ENDED...THE STORMS IN MACOUPIN COUNTY WERE STILL CAPABLE OF PRODUCING VERY HEAVY RAINS. DLF
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 7:55 PM CDT | Tornado Warning | LSX | Greene | 35 min |
| Jun 18, 8:20 PM CDT | Severe Thunderstorm Warning | LSX | Jersey | 35 min |
| Jun 18, 8:35 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 50 min |
| Jun 18, 8:57 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 48 min |
| Jun 18, 9:27 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 48 min |
| Jun 18, 9:44 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 31 min |
| Jun 18, 10:06 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Washington | 49 min |
| Jun 18, 10:39 PM CDT | Severe Thunderstorm Warning | LSX | Marion | 51 min |
| Jun 18, 11:02 PM CDT | Severe Thunderstorm Warning | LSX | Fayette | 48 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.