Alert archive / Alabama / Flash Flood Warnings in 2008
Flash Flood Warning 8, NWS Mobile, AL
NWS Mobile, AL issued this flash flood warning at Apr 11, 2008, 8:57 PM CDT for Choctaw County, Clarke County, Washington County, Alabama. It was in force for 99 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 11, 2008, 8:57 PM CDT (01:57 UTC)
- Expired
- Apr 11, 2008, 10:36 PM CDT
- In force
- 99 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Choctaw County, AL, Clarke County, AL, Washington County, AL
The radar
The Mobile radar (KMOB), 118 km from the middle of the area, began a volume at 01:59 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
Birmingham, AL (KBMX), launched 00:00Z, 2.0 hours before the alert went out and 200 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
- 635 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 623 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- -86 m²/s²
- 0-3 km storm-relative helicity
- -110 m²/s²
- Significant tornado parameter
- -0.4
- Supercell composite
- -2.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS54 KMOB 120159 FFWMOB ALC023-025-129-120400- /O.NEW.KMOB.FF.W.0008.080412T0157Z-080412T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOBILE AL 857 PM CDT FRI APR 11 2008 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHERN CHOCTAW COUNTY IN SOUTHWEST ALABAMA... NORTHWESTERN CLARKE COUNTY IN SOUTHWEST ALABAMA... THIS INCLUDES THE CITY OF GROVE HILL... NORTHERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA... * UNTIL 1100 PM CDT * AT 854 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A LINE OF THUNDERSTORMS NEAR SERVICE...OR ABOUT 21 MILES NORTH OF CHATOM...MOVING EAST AT 30 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO COFFEEVILLE...WOODS BLUFF...MORVIN...HOLTAMVILLE...OPINE...WINN... TALLAHATTA SPRINGS...BASHI...CHILTON AND PEACOCK ADDITIONAL RAINFALL AMOUNTS OF TO 3 INCHES ARE POSSIBLE IN THE WARNED AREA. THIS AREA HAS RECEIVED UP TO 4 INCHES OF RAIN FROM THUNDERSTORMS WHICH CROSSED THE WARNED AREA EARLIER TODAY. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. LAT...LON 3156 8776 3152 8846 3200 8847 3201 8777 TIME...MOT...LOC 0157Z 267DEG 26KT 3175 8812 $$
1 follow-up statement
000 WGUS74 KMOB 120336 FFSMOB FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 1035 PM CDT FRI APR 11 2008 ALC023-025-129-120345- /O.CAN.KMOB.FF.W.0008.000000T0000Z-080412T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON AL-CLARKE AL-CHOCTAW AL- 1035 PM CDT FRI APR 11 2008 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHERN CHOCTAW... NORTHWESTERN CLARKE AND NORTHERN WASHINGTON COUNTIES... HEAVY RAIN HAS DIMINISHED AND MOVED SOUTH OF THE WARNED AREA. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FRIDAY EVENING FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI. LAT...LON 3156 8776 3152 8846 3200 8847 3201 8777 TIME...MOT...LOC 0335Z 267DEG 26KT 3179 8729 $$
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 8:56 PM CDT | Severe Thunderstorm Warning | MOB | Choctaw, Clarke, Washington | 64 min |
| Apr 12, 2:32 AM CDT | Marine Weather Statement | MOB | 50 min |
Nearby
Flash Flood Warnings in Alabama, 2008Every flash flood warning in 2008
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.