Alert archive / Illinois / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 155, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 25, 1997, 5:02 PM CDT for Washington County, Illinois. It was in force for 28 min. 1 report 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
- Aug 25, 1997, 5:02 PM CDT (22:02 UTC)
- Expired
- Aug 25, 1997, 5:30 PM CDT
- In force
- 28 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Washington County, IL
The radar
The St Louis radar (KLSX), 117 km from the middle of the area, began a volume at 22:06 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 |
|---|---|---|---|
| Aug 25, 5:10 PM CDT | Thunderstorm Wind 52 | Ashley, IL | Thunderstorm wind gusts downed power lines in Ashley. |
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 nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.0 hours before the alert went out and 212 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
- 187 J/kg
- Mixed-layer CIN
- -164 J/kg
- Mixed-layer LCL
- 663 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 252202 RRA SVRSTL ILC189-252230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 502 PM CDT MON AUG 25 1997 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL ILLINOIS ...SOUTHEASTERN WASHINGTON COUNTY AT 500 PM CDT A SEVERE THUNDERSTORM WAS INDICATED BY WEATHER RADAR NEAR ASHL EY...MOVING SOUTH AROUND 15 MPH. SOME TOWNS IN THE PATH OF THIS STORM ARE...ASHLEY...RADOM...DU BOIS. SEEK SHELTER IN A STURDY BUILDING. REMEMBER SEVERE THUNDERSTORMS OFTEN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. WDB
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, Aug 25, 11:30 AM CDT, 5 hours 32 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>075-084-085-099-261030- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1130 AM CDT MON AUG 25 1997 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND EAST CENTRAL MISSOURI...AND EXTREME SOUTHWEST ILLINOIS. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT OVER PORTIONS OF CENTRAL AND NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS. THE THREAT AREA IS GENERALLY ALONG AND NORTH OF A LINE FROM COLUMBIA MISSOURI TO SPRINGFIELD ILLINOIS. SCATTERED THUNDERSTORMS ARE EXPECTED ACROSS THE AREA THIS AFTERNOON AND TONIGHT. THE GREATEST THREAT OF SEVERE WEATHER WILL BE FROM A FEW STORMS THAT MAY BECOME SEVERE PRODUCING DAMAGING WINDS AND LARGE HAIL. STORM SPOTTERS AND EMERGENCY MANAGERS SHOULD MONITOR THE LATEST NWS STATEMENTS AND FORECASTS FOR POSSIBLE SKYWARN ACTION. PEDIGO
Special weather statement, Aug 25, 11:33 AM CDT, 5 hours 29 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>075-084-085-099-261030- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1130 AM CDT MON AUG 25 1997 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND EAST CENTRAL MISSOURI...AND EXTREME SOUTHWEST ILLINOIS. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT OVER PORTIONS OF CENTRAL AND NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS. THE THREAT AREA IS GENERALLY ALONG AND NORTH OF A LINE FROM COLUMBIA MISSOURI TO SPRINGFIELD ILLINOIS. SCATTERED THUNDERSTORMS ARE EXPECTED ACROSS THE AREA THIS AFTERNOON AND TONIGHT. THE GREATEST THREAT OF SEVERE WEATHER WILL BE FROM A FEW STORMS THAT MAY BECOME SEVERE PRODUCING DAMAGING WINDS AND LARGE HAIL. STORM SPOTTERS AND EMERGENCY MANAGERS SHOULD MONITOR THE LATEST NWS STATEMENTS AND FORECASTS FOR POSSIBLE SKYWARN ACTION. PEDIGO
Special weather statement, Aug 25, 2:33 PM CDT, 2 hours 29 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>075-084-085-099-261030- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 230 PM CDT MON AUG 25 1997 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND EAST CENTRAL MISSOURI...AND EXTREME SOUTHWEST ILLINOIS. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT OVER THE ENTIRE OUTLOOK AREA. ALTHOUGH THUNDERSTORMS MAY BE DEVELOPING AT ANYTIME DUE TO THE UNSTABLE ATMOSPHERE...THE GREATEST THREAT OF SEVERE THUNDERSTORMS WILL BE LATE THIS AFTERNOON...AND ESPECIALLY TONIGHT. < STORM SPOTTERS AND EMERGENCY MANAGERS SHOULD MONITOR THE LATEST NWS STATEMENTS AND FORECASTS FOR POSSIBLE SKYWARN ACTION. TRUETT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 7:47 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 58 min |
| Aug 24, 8:45 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 60 min |
| Aug 25, 5:27 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 48 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1997Every severe thunderstorm warning in 1997
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.