Alert archive / Missouri / Flash Flood Warnings in 1999
Flash Flood Warning 1, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Apr 3, 1999, 8:49 AM CST for Iron County, Madison County, Saint Francois County, Missouri. It was in force for 3 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, 8:49 AM CST (14:49 UTC)
- Expired
- Apr 3, 1999, 11:50 AM CST
- In force
- 3 hr
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Iron County, MO, Madison County, MO, Saint Francois County, MO
The radar
The St Louis radar (KLSX), 123 km from the middle of the area, began a volume at 14:48 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, 2.8 hours before the alert went out and 302 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 031447 FFWSTL MOC093-123-186-187-031750- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 849 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 1150 AM CST * RADAR SHOWED STRONG THUNDERSTORMS PRODUCING HEAVY RAIN FROM SOUTHERN IRON COUNTY ACROSS MADISON COUNTY AND ST FRANCOIS AND STE GENEVIEVE COUNITES. THESE STORMS WERE MOVING NORTHEAST AT 30 MPH. RADAR ESTIMATES 2 TO 3 INCHES OF RAIN HAS ALREADY FALLEN ACROSS THESE AREAS...WHICH HAS RESULTED IN FLOODING ON SOME SMALL CREEKS AND STREAMS AND HAS BROUGHT MANY TO BANKFUL. AN ADDITIONAL 1 TO 2 INCHES OF RAIN IS POSSIBLE WITH STORMS THROUGH MID-MORNING. IF FLASH FLOODING IS OBSERVEDH OR IMMINENT...MOVE QUICKLY TO HIGHER GROUND. NEVER DRIVE INTO AN AREA WHERE WATER COVERS THE ROAD... ESPECIALLY LOW-WATER BRIDGES FG &
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, 1 hour 49 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, 1 hour 49 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
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 | Sainte Genevieve | 3 hr |
| Apr 3, 11:48 AM CST | Flash Flood Warning | LSX | Iron, Madison, Sainte Genevieve, Saint Francois | 6 hr |
| Apr 3, 5:12 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.