Alert archive / Illinois / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 246, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Dec 23, 1996, 11:19 AM CST for Monroe County, Illinois; Jefferson County, Missouri. It was in force for 41 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
- Dec 23, 1996, 11:19 AM CST (17:19 UTC)
- Expired
- Dec 23, 1996, 12:00 PM CST
- In force
- 41 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Monroe County, IL, Jefferson County, MO
The radar
The St Louis radar (KLSX), 55 km from the middle of the area, began a volume at 17:23 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 |
|---|---|---|---|
| Dec 23, 11:30 AM CST | Hail 0.75 | Festus, MO |
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, 5.3 hours before the alert went out and 258 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
- 70 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 518 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
111 WUUS1 KSTL 231719 RRA SVRSTL ILC133-MOC099-231800- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1119 AM CST MON DEC 23 1996 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL NOON CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST ILLINOIS ...SOUTHERN MONROE COUNTY IN EAST CENTRAL MISSOURI ...SOUTHERN JEFFERSON COUNTY AT 1120 AM...RADAR INDICATED A SEVERE THUNDERSTORM OVER SOUTHWEST JEFFERSON COUNTY MISSOURI. THE STORM WAS 5 MILES SOUTHWEST OF DE SOTO MOVING NORTHEAST AT 45 MPH. THE TOWNS IN THE PATH OF THE STORM ARE DESOTO AND FESTUS AND MAEYSTOWN IN ILLINOIS. 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, Dec 23, 10:33 AM CST, 46 minutes before
ILZ064-065-069-070-074-079-100>102-MOZ061>065-072>075-084-085-099- 240230- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1033 AM CST MON DEC 23 1996 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NWS OFFICE IN ST LOUIS. AREAS INCLUDED ARE PORTIONS OF EAST CENTRAL AND SOUTHEAST MISSOURI AS WELL AS SOUTHWEST ILLINOIS. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE SOUTHEAST HALF OF THE FORECAST AREA...EAST OF A LINE FROM ROLLA TO 25 MILES NORTHWEST OF ST LOUIS TO 75 MILES NORTHEAST OF ST LOUIS. THE GREATEST THREAT OF SEVERE WEATHER WILL BE DURING THE AFTERNOON AND EARLY EVENING HOURS. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE LATEST FORECASTS AND POSSIBLE SKYWARN ACTION. PEDIGO
Special weather statement, Dec 23, 10:40 AM CST, 39 minutes before
ILZ064-065-069-070-074-079-100>102-MOZ061>065-072>075-084-085-099- 240230- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1033 AM CST MON DEC 23 1996 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NWS OFFICE IN ST LOUIS. AREAS INCLUDED ARE PORTIONS OF EAST CENTRAL AND SOUTHEAST MISSOURI AS WELL AS SOUTHWEST ILLINOIS. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE SOUTHEAST HALF OF THE FORECAST AREA...EAST OF A LINE FROM ROLLA TO 25 MILES NORTHWEST OF ST LOUIS TO 75 MILES NORTHEAST OF ST LOUIS. THE GREATEST THREAT OF SEVERE WEATHER WILL BE DURING THE AFTERNOON AND EARLY EVENING HOURS. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE LATEST FORECASTS AND POSSIBLE SKYWARN ACTION. PEDIGO
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 23, 11:43 AM CST | Severe Thunderstorm Warning | LSX | Calhoun | 62 min |
| Dec 23, 11:43 AM CST | Severe Thunderstorm Warning | LSX | Greene | 62 min |
| Dec 23, 2:38 PM CST | Tornado Warning | LSX | Monroe, Randolph | 37 min |
| Dec 23, 3:18 PM CST | Severe Thunderstorm Warning | LSX | Saint Clair, Washington | 27 min |
| Dec 23, 10:27 AM CST | Tornado Warning | LSX | Crawford, Washington | 63 min |
| Dec 23, 10:59 AM CST | Severe Thunderstorm Warning | LSX | Montgomery, Warren | 61 min |
| Dec 23, 11:03 AM CST | Severe Thunderstorm Warning | LSX | Lincoln | 42 min |
| Dec 23, 12:10 PM CST | Severe Thunderstorm Warning | LSX | Franklin | 65 min |
| Dec 23, 1:40 PM CST | Tornado Warning | LSX | Iron, Washington | 35 min |
| Dec 23, 2:15 PM CST | Tornado Warning | LSX | Saint Francois, Washington | 30 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1996Severe Thunderstorm Warnings in Missouri, 1996Every severe thunderstorm warning in 1996
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.