Alert archive / Missouri / Flash Flood Warnings in 2003
Flash Flood Warning 32, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jul 9, 2003, 8:44 PM CDT for Knox County, Lewis County, 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 outline as issued.
The facts
- Issued
- Jul 9, 2003, 8:44 PM CDT (01:44 UTC)
- Expired
- Jul 10, 2003, 2:45 AM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Counties, with a storm outline in the text
Counties Knox County, MO, Lewis County, MO
The radar
The St Louis radar (KLSX), 191 km from the middle of the area, began a volume at 01:46 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.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.7 hours before the alert went out and 198 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
- 1258 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 757 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 228 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KLSX 100146 FFWLSX MOC103-111-100745- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 844 PM CDT WED JUL 9 2003 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * FLASH FLOOD WARNING FOR... KNOX COUNTY IN NORTHEAST MISSOURI LEWIS COUNTY IN NORTHEAST MISSOURI * UNTIL 245 AM CDT * AT 844 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING VERY HEAVY RAIN MOVING SOUTHEAST ACROSS NORTHEASTERN MISSOURI. * FLASH FLOODING CAN BE EXPECTED ACROSS THESE TWO COUNTIES. 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. LAT...LON 4026 9154 3999 9152 4000 9232 4031 9232 $$ CVKING
1 follow-up statement
000 WGUS73 KLSX 100442 FFSLSX MOC103-111-100745- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1140 PM CDT WED JUL 9 2003 ...FLASH FLOOD WARNING FOR LEWIS AND KNOX COUNTIES HAS BEEN CANCELLED... WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE THUNDERSTORMS WHICH PROMPTED THE FLASH FLOOD WARNING HAVE MOVED OUT OF THE AREA. AT 1130 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED NO FLOODING IN LEWIS OR KNOX COUNTIES...SO THE WARNING HAS BEEN EXPIRED. $$ BRITT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 8:34 PM CDT | Severe Thunderstorm Warning | LSX | Knox | 41 min |
| Jul 9, 8:49 PM CDT | Severe Thunderstorm Warning | LSX | Lewis | 56 min |
| Jul 9, 9:15 PM CDT | Severe Thunderstorm Warning | LSX | Knox | 45 min |
| Jul 9, 9:22 PM CDT | Severe Thunderstorm Warning | LSX | Marion | 53 min |
| Jul 9, 9:27 PM CDT | Severe Thunderstorm Warning | LSX | Shelby | 48 min |
| Jul 9, 10:14 PM CDT | Severe Thunderstorm Warning | LSX | Pike, Ralls | 61 min |
| Jul 9, 10:16 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 59 min |
Nearby
Flash Flood Warnings in Missouri, 2003Every flash flood warning in 2003
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.