Alert archive / Missouri / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 89, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 17, 1999, 1:43 PM CDT for Madison County, Missouri. It was in force for 47 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
- May 17, 1999, 1:43 PM CDT (18:43 UTC)
- Expired
- May 17, 1999, 2:30 PM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Madison County, MO
The radar
The St Louis radar (KLSX), 139 km from the middle of the area, began a volume at 18:46 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 |
|---|---|---|---|
| May 17, 2:03 PM CDT | Hail 1.75 | Buckhorn, 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
Little Rock, AR (KLZK), launched 12:00Z, 6.7 hours before the alert went out and 297 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
- 1018 J/kg
- Mixed-layer CIN
- -146 J/kg
- Mixed-layer LCL
- 941 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KSTL 171845 RRA SVRSTL MOC123-171930- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 143 PM CDT MON MAY 17 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MADISON COUNTY MISSOURI IN SOUTHEASTERN MISSOURI * UNTIL 230 PM CDT * AT 142 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS SOUTHWEST THROUGH EAST-CENTRAL MADISON COUNTY... MOVING NORTHEAST AT 40 MPH. * LOCATIONS THAT WILL BE AFFECTED... MARQUAND BUCKHORN SACO 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/MB
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, May 17, 11:00 AM CDT, 2 hours 43 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>075-084-085-099-181300- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1100 AM CDT MON MAY 17 1999 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. THE AREA DESIGNATED EARLIER AS A SLIGHT RISK FOR SEVERE THUNDERSTORMS HAS BEEN SHIFTED SOUTHEAST SOMEWHAT AND NOW INCLUDES AN AREA EAST OF A LINE FROM SPRINGFIELD ILLINOIS TO ST LOUIS TO BRANSON MISSOURI. AREAS OF NORTHEASTERN MISSOURI HAVE BEEN EXCLUDED IN THIS OUTLOOK AREA. THOUGH THE CHANCE FOR SEVERE THUNDERSTORMS IS LIMITED...THE PROBABILITY OF HEAVY AND REPEATED THUNDERSTORMS TREKING ACROSS THE SAME AREA REMAINS A POSSIBILITY AND THEREFORE A FLASH FLOOD WATCH REMAINS IN EFFECT FOR TODAY FOR THE ENTIRE WARNING AREA. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD MONITOR WEATHER DEVELOPMENTS THROUGHOUT THE DAY FOR POSSIBLE SKYWARN ACTION...FOR FLOODING PROBLEMS NORTHWEST AND FOR SEVERE STORMS IN THE SOUTHEAST PORTION OF THE FORECAST AREA. PEDIGO
Special weather statement, May 17, 11:00 AM CDT, 2 hours 43 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>075-084-085-099-181300- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1100 AM CDT MON MAY 17 1999 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. THE AREA DESIGNATED EARLIER AS A SLIGHT RISK FOR SEVERE THUNDERSTORMS HAS BEEN SHIFTED SOUTHEAST SOMEWHAT AND NOW INCLUDES AN AREA EAST OF A LINE FROM SPRINGFIELD ILLINOIS TO ST LOUIS TO BRANSON MISSOURI. AREAS OF NORTHEASTERN MISSOURI HAVE BEEN EXCLUDED IN THIS OUTLOOK AREA. THOUGH THE CHANCE FOR SEVERE THUNDERSTORMS IS LIMITED...THE PROBABILITY OF HEAVY AND REPEATED THUNDERSTORMS TREKING ACROSS THE SAME AREA REMAINS A POSSIBILITY AND THEREFORE A FLASH FLOOD WATCH REMAINS IN EFFECT FOR TODAY FOR THE ENTIRE WARNING AREA. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD MONITOR WEATHER DEVELOPMENTS THROUGHOUT THE DAY FOR POSSIBLE SKYWARN ACTION...FOR FLOODING PROBLEMS NORTHWEST AND FOR SEVERE STORMS IN THE SOUTHEAST PORTION OF THE FORECAST AREA. PEDIGO
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 1:32 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Callaway, Montgomery | 48 min |
| May 17, 2:19 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Pike | 46 min |
| May 17, 2:19 AM CDT | Severe Thunderstorm Warning | LSX | Callaway | 46 min |
| May 17, 2:43 AM CDT | Severe Thunderstorm Warning | LSX | Ralls | 47 min |
| May 17, 1:17 PM CDT | Severe Thunderstorm Warning | LSX | Reynolds | 48 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.