Alert archive / Missouri / Flash Flood Warnings in 2002
Flash Flood Warning 31, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Aug 20, 2002, 1:32 AM CDT 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
- Aug 20, 2002, 1:32 AM CDT (06:32 UTC)
- Expired
- Aug 20, 2002, 7:30 AM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Boone County, MO, Callaway County, MO, Cole County, MO, Osage County, MO
The radar
The St Louis radar (KLSX), 123 km from the middle of the area, began a volume at 06:34 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 00:00Z, 6.5 hours before the alert went out and 250 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
- 3042 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 1610 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KLSX 200632 FFWSTL MOC019-027-051-151-201230- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 128 AM CDT TUE AUG 20 2002 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * FLASH FLOOD WARNING FOR... BOONE COUNTY IN CENTRAL MISSOURI CALLAWAY COUNTY IN CENTRAL MISSOURI COLE COUNTY IN CENTRAL MISSOURI OSAGE COUNTY IN CENTRAL MISSOURI * UNTIL 730 AM CDT * AT 128 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING VERY HEAVY RAIN EXTENDING FROM NEAR HARRISBURG IN NORTHWEST BOONE COUNTY TO NEAR LINN IN OSAGE COUNTY. THESE STORMS WERE REPEATEDLY MOVING OVER THE SAME LOCATIONS AS THEY MOVED TO THE SOUTHEAST AT 25 MPH. RADAR ESTIMATES THAT 2.5 TO 4 INCHES OF RAIN HAS ALREADY FALLEN SINCE 1100 PM IN THE REGION FROM HARRISBURG TO COLUMBIA TO NEW BLOOMFIELD. ANOTHER 1 TO 3 INCHES OF RAIN IS POSSIBLE THROUGH 400 AM. * FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...INCLUDING THE LARGER COMMUNITIES OF COLUMBIA AND JEFFERSON CITY. IF FLASH FLOODING IS OBSERVED OR IMMINENT...MOVE QUICKLY TO HIGHER GROUND. NEVER DRIVE INTO AN AREA WHERE WATER COVERS THE ROAD. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. ACT QUICKLY IF FLASH FLOODING IS OBSERVED. MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. GLASS
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 9:02 PM CDT | Severe Thunderstorm Warning | LSX | 43 min | |
| Aug 19, 9:23 PM CDT | Flash Flood Warning | LSX | Iron, Reynolds | 3 hr |
| Aug 19, 9:30 PM CDT | Tornado Warning | LSX | Reynolds | 30 min |
| Aug 19, 10:24 PM CDT | Severe Thunderstorm Warning | LSX | 51 min | |
| Aug 20, 12:02 AM CDT | Severe Thunderstorm Warning | LSX | 43 min |
Nearby
Flash Flood Warnings in Missouri, 2002Every flash flood warning in 2002
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.