Alert archive / Illinois / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 11, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 28, 1997, 2:45 PM CST for Madison County, Saint Clair County, Illinois. It was in force for 45 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
- Mar 28, 1997, 2:45 PM CST (20:45 UTC)
- Expired
- Mar 28, 1997, 3:30 PM CST
- In force
- 45 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Madison County, IL, Saint Clair County, IL
The radar
The St Louis radar (KLSX), 67 km from the middle of the area, began a volume at 20:49 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 |
|---|---|---|---|
| Mar 28, 2:45 PM CST | Hail 0.75 | Cahokia, IL | |
| Mar 28, 2:55 PM CST | Hail 0.75 | Troy, 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 |
|---|---|---|---|
| Mar 28, 2:15 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 8.8 hours before the alert went out and 202 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
- 127 J/kg
- Mixed-layer CIN
- -142 J/kg
- Mixed-layer LCL
- 815 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 207 m²/s²
- 0-3 km storm-relative helicity
- 211 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 282045 RRA SVRSTL ILC119-163-282130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 245 PM CST FRI MAR 28 1997 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST ILLINOIS ...MADISON COUNTY...NORTHERN ST. CLAIR COUNTY AT 240 PM CDT...NWS DOPPLER RADAR SHOWED A SEVERE THUNDERSTORM OVER NORTHERN ST. CLAIR COUNTY NEAR THE TOWN OF CENTERVILLE. THIS STORM WAS MOVING NORTHEAST AT 35 MILES AN HOUR AND WILL AFFECT THE TOWNS OF COLLINSVILLE...HIGHLAND AND EDWARDSVILLE. THIS STORM HAS A HISTORY OF DAMAGING WINDS. SEEK INSIDE SHELTEFR NOW! RP
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, Mar 28, 11:00 AM CST, 3 hours 45 minutes before
MOZ042-041-050-010-048-072-062-059-084-018-019-052-085-027-047- 051-034-049-036-035-099-061-075-074-063-064-009-026-060-073-ILZ095- 064-096-098-069-065-058-099-059-100-070-102-060-097-079-101-074- MOZ065-290000- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1100 AM CST FRI MAR 28 1997 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NWS OFFICE IN ST LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND EAST CENTRAL MISSOURI...AND SOUTHWEST ILLINOIS. THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EARLY EVENING OVER SOUTHEAST MISSOURI AND A SMALL PORTION OF SOUTHWEST ILLINOIS. SURROUNDING THIS AREA...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS COVERING MUCH OF EASTERN MISSOURI AND WESTERN ILLINOIS...GENERALLY TO THE RIGHT OF A LINE FROM NEAR WEST PLAINS TO MEXICO...TO AROUND 10 MILES EAST OF MEMPHIS. GUSTY SOUTHERLY WINDS WERE DRAWING WARM MOIST AND UNSTABLE AIR NORTHWARD IN ADVANCE OF A COLD FRONT MOVING THOUGH CENTRAL MISSOURI LATE THIS MORNING. AS THIS COLD FRONT CONTINUES TO PROGRESS EASTWARD THIS AFTERNOON...THE COMBINATION OF COLD AIR IN THE MIDDLE LEVELS OF THE ATMOSPHERE AND CONTINUED HEATING AHEAD OF THE FRONT SHOULD RESULT IN A MODERATELY TO VERY UNSTABLE AIR MASS OVER FAR EASTERN MISSOURI AND WESTERN ILLINOIS. THUNDERSTORMS...SOME OF WHICH MAY BE SEVERE...ARE EXPECTED TO DEVELOP ALONG THE FRONT AS IT MOVES ACROSS EASTERN MISSOURI THIS AFTERNOON. THE PRIMARY SEVERE WEATHER THREAT FROM THESE STORMS SHOULD BE LARGE HAIL AND DAMAGING WINDS. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE LATEST FORECAST FOR POSSIBLE SKYWARN ACTION. GLASS
Special weather statement, Mar 28, 11:04 AM CST, 3 hours 41 minutes before
MOZ042-041-050-010-048-072-062-059-084-018-019-052-085-027-047- 051-034-049-036-035-099-061-075-074-063-064-009-026-060-073-ILZ095- 064-096-098-069-065-058-099-059-100-070-102-060-097-079-101-074- MOZ065-290000- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1100 AM CST FRI MAR 28 1997 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NWS OFFICE IN ST LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND EAST CENTRAL MISSOURI...AND SOUTHWEST ILLINOIS. THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EARLY EVENING OVER SOUTHEAST MISSOURI AND A SMALL PORTION OF SOUTHWEST ILLINOIS. SURROUNDING THIS AREA...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS COVERING MUCH OF EASTERN MISSOURI AND WESTERN ILLINOIS...GENERALLY TO THE RIGHT OF A LINE FROM NEAR WEST PLAINS TO MEXICO...TO AROUND 10 MILES EAST OF MEMPHIS. GUSTY SOUTHERLY WINDS WERE DRAWING WARM MOIST AND UNSTABLE AIR NORTHWARD IN ADVANCE OF A COLD FRONT MOVING THOUGH CENTRAL MISSOURI LATE THIS MORNING. AS THIS COLD FRONT CONTINUES TO PROGRESS EASTWARD THIS AFTERNOON...THE COMBINATION OF COLD AIR IN THE MIDDLE LEVELS OF THE ATMOSPHERE AND CONTINUED HEATING AHEAD OF THE FRONT SHOULD RESULT IN A MODERATELY TO VERY UNSTABLE AIR MASS OVER FAR EASTERN MISSOURI AND WESTERN ILLINOIS. THUNDERSTORMS...SOME OF WHICH MAY BE SEVERE...ARE EXPECTED TO DEVELOP ALONG THE FRONT AS IT MOVES ACROSS EASTERN MISSOURI THIS AFTERNOON. THE PRIMA RY SEVERE WEATHER THREAT FROM THESE STORMS SHOULD BE LARGE HAIL AND DAMAGING WINDS. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE LATEST FORECAST FOR POSSIBLE SKYWARN ACTION. GLASS
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 28, 2:02 PM CST | Severe Thunderstorm Warning | LSX | Bond, Madison | 43 min |
| Mar 28, 2:08 PM CST | Severe Thunderstorm Warning | LSX | Greene | 52 min |
| Mar 28, 2:27 PM CST | Severe Thunderstorm Warning | LSX | Randolph | 48 min |
| Mar 28, 2:52 PM CST | Severe Thunderstorm Warning | LSX | Saint Clair, Washington | 53 min |
| Mar 28, 3:20 PM CST | Severe Thunderstorm Warning | LSX | Washington | 40 min |
| Mar 28, 3:27 PM CST | Severe Thunderstorm Warning | LSX | Macoupin | 48 min |
| Mar 28, 4:02 PM CST | Severe Thunderstorm Warning | LSX | Clinton, Marion | 43 min |
| Mar 28, 4:15 PM CST | Severe Thunderstorm Warning | LSX | Fayette | 45 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.