Alert archive / Missouri / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 50, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 3, 1999, 5:12 PM CST for Crawford County, Missouri. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 3, 1999, 5:12 PM CST (23:12 UTC)
- Expired
- Apr 3, 1999, 6:00 PM CST
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Crawford County, MO
The radar
The St Louis radar (KLSX), 97 km from the middle of the area, began a volume at 23:04 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.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 11.2 hours before the alert went out and 251 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
- 1749 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 744 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 268 m²/s²
- 0-3 km storm-relative helicity
- 294 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 6.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 032312 RRA SVRSTL MOC055-040000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 512 PM CST SAT APR 3 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CRAWFORD COUNTY IN CENTRAL MISSOURI * UNTIL 600 PM CST * AT 510 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS 10 MILES SOUTHWEST OF COOKS STATION. .. MOVING NORTHEAST AT 40 MPH. * LOCATIONS THAT WILL BE AFFECTED... COOKS STATION STEELEVILLE CUBA CHERRYVILLE THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING WINDS. MOVE QUICKLY TO A STURDY BUILDING AND STAY AWAY FROM DOORS AND WINDOWS. FG/GK0S
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 3, 11:25 AM CST, 5 hours 47 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>075-084-085-099-032300- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1125 AM CST SAT APR 3 1999 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 SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE ENTIRE AREA THIS AFTERNOON AND ESPECIALLY TONIGHT. SCATTERED THUNDERSTORMS ARE POSSIBLE ACROSS THE AREA THIS AFTERNOON WHICH COULD PRODUCE LARGE HAIL AND DAMAGING WINDS...HOWEVER THE MAIN THREAT APPEARS TO BE TONIGHT. A SQUALL LINE IS EXPECTED TO DEVELOP IN WESTERN MISSOURI LATE THIS AFTERNOON AND MOVE ACROSS THE AREA TONIGHT BRINGING A THREAT OF DAMAGING WINDS. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE LATEST FORECASTS FOR POSSIBLE SKYWARN ACTION. GLASS
Special weather statement, Apr 3, 11:25 AM CST, 5 hours 47 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>075-084-085-099-032300- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1125 AM CST SAT APR 3 1999 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 SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE ENTIRE AREA THIS AFTERNOON AND ESPECIALLY TONIGHT. SCATTERED THUNDERSTORMS ARE POSSIBLE ACROSS THE AREA THIS AFTERNOON WHICH COULD PRODUCE LARGE HAIL AND DAMAGING WINDS...HOWEVER THE MAIN THREAT APPEARS TO BE TONIGHT. A SQUALL LINE IS EXPECTED TO DEVELOP IN WESTERN MISSOURI LATE THIS AFTERNOON AND MOVE ACROSS THE AREA TONIGHT BRINGING A THREAT OF DAMAGING WINDS. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE LATEST FORECASTS 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 |
|---|---|---|---|---|
| Apr 3, 6:42 AM CST | Severe Thunderstorm Warning | LSX | Iron, Reynolds | 33 min |
| Apr 3, 8:12 AM CST | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Louis | 48 min |
| Apr 3, 8:49 AM CST | Flash Flood Warning | LSX | Iron, Madison, Saint Francois | 3 hr |
| Apr 3, 8:49 AM CST | Flash Flood Warning | LSX | Sainte Genevieve | 3 hr |
| Apr 3, 11:48 AM CST | Flash Flood Warning | LSX | Iron, Madison, Sainte Genevieve, Saint Francois | 6 hr |
| Apr 3, 5:57 PM CST | Flash Flood Warning | LSX | Iron, Madison, Reynolds, Saint Francois | 4 hr |
Nearby
Severe Thunderstorm Warnings in Missouri, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.