Alert archive / Missouri / Flash Flood Warnings in 1999
Flash Flood Warning 3, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Apr 3, 1999, 11:48 AM CST for 4 counties in Missouri. It was in force for 6 hr. 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, 11:48 AM CST (17:48 UTC)
- Expired
- Apr 3, 1999, 5:45 PM CST
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Iron County, MO, Madison County, MO, Saint Francois County, MO, Sainte Genevieve County, MO
The radar
The St Louis radar (KLSX), 116 km from the middle of the area, began a volume at 17:48 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, 5.8 hours before the alert went out and 311 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 031746 FFWSTL MOC093-123-186-187-032345- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1148 AM CST SAT APR 3 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * FLASH FLOOD WARNING FOR... IRON COUNTY IN SOUTHEASTERN MISSOURI MADISON COUNTY MISSOURI IN SOUTHEASTERN MISSOURI ST. FRANCOIS COUNTY IN EAST CENTRAL MISSOURI STE. GENEVIEVE COUNTY IN EAST CENTRAL MISSOURI * UNTIL 545 PM CST * AT 1145 AM...RADAR INDICATED THUNDERSTORMS EXTENDING FROM JUST SOUTHWEST OF SACO ACROSS EASTERN MADISON COUNTY INTO PERRY COUNTY. THESE STORMS WERE MOVING TO THE NORTHEAST AT 30 MPH. ONLY WIDELY SCATTERED SHOWERS WERE OCCURING WEST OF THIS LINE...AND CURRENT INDICATIONS ARE THAT THE WIDESPREAD THUNDERSTORM ACTIVITY SHOULD END OVER MADISON COUNTY BY 100 PM. * WHILE THE SIGNIFICANT RAINFALL HAS ENDED OR WILL BE ENDING SOON... WIDESPREAD FLOODING IS OCCURING ACROSS IRON...MADISON...ST FRANCOIS AND STE GENEVIEVE COUNTIES. EVEN WITH THE END OF THE HEAVY RAIN...WATER WILL BE SLOW TO RECEDE...AND THUS THE FLASH FLOOD WARNING IS BEING EXTENDED INTO THE LATE AFTERNOON. IF FLASH FLOODING IS OBSERVED OR IMMINENT...MOVE QUICKLY TO HIGHER GROUND. NEVER DRIVE INTO AN AREA WHERE WATER COVERS THE ROAD... ESPECIALLY LOW-WATER BRIDGES MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW-WATER CROSSINGS IF WATER COVERS THE hROADWAY. DO NOT DRIVE AROUND BARRICADES. IF YOUR VEHICLE STALLS ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. RAPIDLY RISING WATER MAY SWEEP THE VEHICLE AND ITS OCCUPANTS AWAY. GLASS &
What forecasters said that day
The local office's own words before this flash flood 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, 7:00 AM CST, 4 hours 48 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>075-084-085-099-031700- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 700 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 TODAY AND EARLY TONIGHT. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE LATEST FORECASTS FOR POSSIBLE SKYWARN ACTION. TRUETT
Special weather statement, Apr 3, 7:00 AM CST, 4 hours 48 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>075-084-085-099-031700- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 700 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 TODAY AND EARLY TONIGHT. STORM SPOTTER GROUPS AND EMERGENCY MANAGERS SHOULD KEEP ADVISED OF THE LATEST FORECASTS FOR POSSIBLE SKYWARN ACTION. TRUETT
Special weather statement, Apr 3, 11:25 AM CST, 23 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, 23 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, 5:12 PM CST | Severe Thunderstorm Warning | LSX | Crawford | 48 min |
| Apr 3, 5:57 PM CST | Flash Flood Warning | LSX | Iron, Madison, Reynolds, Saint Francois | 4 hr |
Nearby
Flash Flood Warnings in Missouri, 1999Every flash flood 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.