Alert archive / Alabama / Flash Flood Warnings in 2009
Flash Flood Warning 39, NWS Mobile, AL
NWS Mobile, AL issued this flash flood warning at May 27, 2009, 7:52 PM CDT for Choctaw County, Alabama. It was in force for 2 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
- May 27, 2009, 7:52 PM CDT (00:52 UTC)
- Expired
- May 27, 2009, 10:09 PM CDT
- In force
- 2 hr
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
- Flood severity
- None
County Choctaw County, AL
The radar
The Mobile radar (KMOB), 122 km from the middle of the area, began a volume at 00:53 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
Jackson, MS (KJAN), launched 00:00Z, 0.9 hours before the alert went out and 178 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
- 1547 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1392 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS54 KMOB 280052 FFWMOB ALC023-280345- /O.NEW.KMOB.FF.W.0039.090528T0052Z-090528T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOBILE AL 752 PM CDT WED MAY 27 2009 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTH CENTRAL CHOCTAW COUNTY IN SOUTHWEST ALABAMA... * UNTIL 1045 PM CDT * AT 747 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT SHOWERS AND THUNDERSTORMS HAVE BEEN CONTINUING ACROSS SOUTH CENTRAL CHOCTAW COUNTY FOR THE LAST HOUR. RADAR RAINFALL ESTIMATES INDICATE THAT UP TO 4 INCHES OF RAIN HAS FALLEN OVER THE LAST HOUR OVER SOUTH CENTRAL CHOCTAW COUNTY...NEAR THE TOWNS OF BOLINGER AND SILAS. AS SHOWERS AND THUNDERSTORMS CONTINUE OVER THIS AREA...THIS WILL RESULT IN FLASH FLOODING OVER SOUTH CENTRAL CHOCTAW COUNTY. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SILAS AND BOLINGER PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. && LAT...LON 3182 8836 3180 8820 3172 8821 3172 8837 $$
2 follow-up statements
000 WGUS74 KMOB 280213 FFSMOB FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 913 PM CDT WED MAY 27 2009 ALC023-280345- /O.CON.KMOB.FF.W.0039.000000T0000Z-090528T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CHOCTAW AL- 913 PM CDT WED MAY 27 2009 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT FOR SOUTH CENTRAL CHOCTAW COUNTY... AT 909 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT MOST OF THE SHOWERS AND THUNDERSTORMS THAT BROUGHT HEAVY RAINS TO SOUTH CENTRAL CHOCTAW COUNTY HAVE MOVED EAST OF THE AREA. RADAR PRECIPITATION ESTIMATES INDICATE THAT 3 TO 4 INCHES OF RAIN HAS FALLEN OVER THE LAST TWO HOURS IN THIS AREA. ALTHOUGH MOST OF THE RAINS HAVE ENDED...FLASH FLOODING WILL CONTINUE OVER THE WARNED AREA UNTIL THE RUNOFF FROM THE PREVIOUS HEAVY RAINFALL HAS SUBSIDED. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BOLINGER PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. && LAT...LON 3182 8836 3180 8820 3172 8821 3172 8837 $$
000 WGUS74 KMOB 280309 FFSMOB FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 1009 PM CDT WED MAY 27 2009 ALC023-280317- /O.CAN.KMOB.FF.W.0039.000000T0000Z-090528T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CHOCTAW AL- 1009 PM CDT WED MAY 27 2009 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL CHOCTAW COUNTY... AT 1007 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT MOST OF THE SHOWERS AND THUNDERSTORMS THAT PREVIOUSLY AFFECTED SOUTH CENTRAL CHOCTAW COUNTY HAVE MOVED EAST OF THE AREA. RADAR PRECIPITATION ESTIMATES INDICATED THAT 3 TO 4 INCHES OF RAIN FELL OVER THIS AREA OVER THE LAST FEW HOURS BUT A SUFFICIENT AMOUNT OF TIME HAS PASSED TO ALLOW FOR THIS HEAVY RAINFALL TO RUN OFF. MINOR NUSIANCE FLOODING OF STREAMS AND POOR DRAINAGE AREAS MAY PERSIST FOR A SHORT TIME BUT OTHERWISE THE FLASH FLOODING RISK HAS PASSED. LAT...LON 3182 8836 3180 8820 3172 8821 3172 8837 $$
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 7:08 PM CDT | Severe Thunderstorm Warning | MOB | Choctaw, Washington | 22 min |
| May 27, 7:40 PM CDT | Areal Flood Advisory | MOB | Choctaw | 3 hr |
| May 27, 7:50 PM CDT | Severe Thunderstorm Warning | MOB | Choctaw, Clarke, Washington | 40 min |
| May 27, 9:19 PM CDT | Areal Flood Advisory | MOB | Monroe | 3 hr |
| May 28, 5:13 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin, Mobile | 32 min |
| May 28, 6:09 PM CDT | Severe Thunderstorm Warning | MOB | Covington | 36 min |
Nearby
Flash Flood Warnings in Alabama, 2009Every flash flood warning in 2009
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.