Alert archive / Missouri / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 149, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 10, 1999, 3:26 PM CDT for Montgomery County, Warren County, Missouri. It was in force for 49 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
- Jun 10, 1999, 3:26 PM CDT (20:26 UTC)
- Expired
- Jun 10, 1999, 4:15 PM CDT
- In force
- 49 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Montgomery County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 57 km from the middle of the area, began a volume at 20:28 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
Lincoln, IL (KILX), launched 12:00Z, 8.4 hours before the alert went out and 274 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
- 985 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 1363 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
018 WUUS1 KSTL 102025 RRA SVRSTL MOC139-219-102115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 326 PM CDT THU JUN 10 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN MONTGOMERY COUNTY MISSOURI IN EASTERN MISSOURI NORTHERN WARREN COUNTY IN EAST CENTRAL MISSOURI * UNTIL 415 PM CDT * AT 325 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER JONESBURG...10 MILES WEST OF WARRENTON... MOVING NORTH AT 25 MPH. * LOCATIONS THAT WILL BE AFFECTED... HIGH HILL SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND GUSTS IN EXCESS OF 60 MPH...DAMAGING HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OR YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. RP/TS
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 10, 11:30 AM CDT, 3 hours 56 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>075-084-085-099-111200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1130 AM CDT THU JUN 10 1999 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER WEST CENTRAL ILLINOIS...NORTHEAST MISSOURI AND A PORTION OF CENTRAL MISSOURI THIS AFTERNOON AND TONIGHT. THE SLIGHT RISK AREA IS NORTH OF A LINE FROM COLUMBIA MISSOURI TO ST LOUIS TO VANDALIA ILLINOIS. THE PRIMARY THREAT WILL BE LARGE HAIL AND DAMAGING WINDS. FURTHER SOUTH...WARM AND UNSTABLE AIR WILL BE FOUND OVER SOUTHEASTERN MISSOURI AND SOUTHWEST ILLINOIS. AS A RESULT...SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND EARLY THIS EVENING. THERE IS THE POSSIBILITY THAT ISOLATED STORMS COULD APPROACH SEVERE LIMITS...PRODUCING UP TO DIME SIZED HAIL AND WIND GUSTS TO 55 MPH. DUE TO THE SLOW SPEED OF THE THUNDERSTORMS...LOCALLY HEAVY RAINFALL WILL BE POSSIBLE...AND THIS IN TURN MAY PRODUCE LOCALIZED INCONVENIENCE FLOODING. SKYWARN ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT... PRIMARILY IN THE SLIGHT RISK AREA. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD MONITOR WEATHER DEVELOPMENTS THIS AFTERNOON AND TONIGHT. THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST LOUIS. AREAS INCLUDED ARE PORTIONS OF NORTHEAST...CENTRAL...EAST CENTRAL AND SOUTHEAST MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. GKS
Special weather statement, Jun 10, 11:30 AM CDT, 3 hours 56 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>075-084-085-099-111200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1130 AM CDT THU JUN 10 1999 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER WEST CENTRAL ILLINOIS...NORTHEAST MISSOURI AND A PORTION OF CENTRAL MISSOURI THIS AFTERNOON AND TONIGHT. THE SLIGHT RISK AREA IS NORTH OF A LINE FROM COLUMBIA MISSOURI TO ST LOUIS TO VANDALIA ILLINOIS. THE PRIMARY THREAT WILL BE LARGE HAIL AND DAMAGING WINDS. FURTHER SOUTH...WARM AND UNSTABLE AIR WILL BE FOUND OVER SOUTHEASTERN MISSOURI AND SOUTHWEST ILLINOIS. AS A RESULT...SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND EARLY THIS EVENING. THERE IS THE POSSIBILITY THAT ISOLATED STORMS COULD APPROACH SEVERE LIMITS...PRODUCING UP TO DIME SIZED HAIL AND WIND GUSTS TO 55 MPH. DUE TO THE SLOW SPEED OF THE THUNDERSTORMS...LOCALLY HEAVY RAINFALL WILL BE POSSIBLE...AND THIS IN TURN MAY PRODUCE LOCALIZED INCONVENIENCE FLOODING. SKYWARN ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT... PRIMARILY IN THE SLIGHT RISK AREA. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD MONITOR WEATHER DEVELOPMENTS THIS AFTERNOON AND TONIGHT. THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST LOUIS. AREAS INCLUDED ARE PORTIONS OF NORTHEAST...CENTRAL...EAST CENTRAL AND SOUTHEAST MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. GKS
Special weather statement, Jun 10, 3:07 PM CDT, 19 minutes before
MOZ009-010-018-102100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 307 PM CDT THU JUN 10 1999 THE SEVERE THUNDERSTORM WATCH FOR A SMALL PORTION OF NORTHEAST MISSOURI HAS BEEN CANCELLED. SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS NORTHEAST MISSOURI DURING THE REMAINDER OF THE AFTERNOON AND INTO THE EARLY EVENING...HOWEVER THE THREAT OF SEVERE STORMS HAS DIMINISHED SIGNIFICANTLY. FG
Special weather statement, Jun 10, 3:07 PM CDT, 19 minutes before
MOZ009-010-018-102100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 307 PM CDT THU JUN 10 1999 THE SEVERE THUNDERSTORM WATCH FOR A SMALL PORTION OF NORTHEAST MISSOURI HAS BEEN CANCELLED. SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS NORTHEAST MISSOURI DURING THE REMAINDER OF THE AFTERNOON AND INTO THE EARLY EVENING...HOWEVER THE THREAT OF SEVERE STORMS HAS DIMINISHED SIGNIFICANTLY. FG
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 12:19 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Osage | 51 min |
| Jun 10, 12:44 PM CDT | Severe Thunderstorm Warning | LSX | Scotland | 51 min |
| Jun 10, 1:16 PM CDT | Severe Thunderstorm Warning | LSX | Audrain | 49 min |
| Jun 10, 1:18 PM CDT | Severe Thunderstorm Warning | LSX | Clark | 47 min |
| Jun 10, 1:46 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 49 min |
| Jun 10, 3:40 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles | 35 min |
| Jun 10, 3:45 PM CDT | Severe Thunderstorm Warning | LSX | Osage | 50 min |
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.