Alert archive / Alabama / Flash Flood Warnings in 2011

Flash Flood Warning 50, NWS Birmingham, AL

September 5, 2011Sumter County, Alabama

NWS Birmingham, AL issued this flash flood warning at Sep 5, 2011, 8:27 AM CDT for Sumter County, Alabama. It was in force for 4 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
Sep 5, 2011, 8:27 AM CDT (13:27 UTC)
Expired
Sep 5, 2011, 12:30 PM CDT
In force
4 hr
Issued by
NWS Birmingham, AL
Area
Storm-based polygon
Flood severity
None

County Sumter County, AL

The radar

The Birmingham radar (KBMX), 134 km from the middle of the area, began a volume at 13:28 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 12:00Z, 1.5 hours before the alert went out and 134 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.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2011-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 371 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2011-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 238 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
371 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
471 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
238 m²/s²
0-3 km storm-relative helicity
277 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

668 
WGUS54 KBMX 051327
FFWBMX
ALC119-051730-
/O.NEW.KBMX.FF.W.0050.110905T1327Z-110905T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
827 AM CDT MON SEP 5 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SUMTER COUNTY IN WEST CENTRAL ALABAMA...

* UNTIL 1230 PM CDT

* AT 824 AM CDT...NATIONAL WEATHER SERVICE INDICATED AN AREA OF 
VERY   HEAVY RAINFALL SPREADING ACROSS THE AREA. THIS RAIN IS 
FALLING ON AREAS THAT HAVE ALREADY RECEIVED TWO TO FOUR INCHES 
DURING THE PAST 24 HOURS...AND WILL RAPIDLY RUNOFF INTO SMALL CREEKS 
AND STREAMS AS WELL AS LOW LYING AREAS PRONE TO FLOODING. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CUBA...LIVINGSTON...YORK...BLUFFPORT...BOYD...COATOPA...DUG HILL...
  EMELLE...EPES...GAINESVILLE...KINTERBISH...PANOLA...AND WEST UNION.


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.

&&

TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758.

LAT...LON 3299 8834 3299 8817 3292 8821 3286 8815
      3283 8818 3280 8806 3269 8811 3269 8804
      3259 8806 3263 8793 3261 8784 3260 8784
      3261 8788 3252 8784 3252 8792 3242 8804
      3237 8805 3231 8794 3230 8794 3231 8843

$$

41

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 5, 4:31 AM CDTWind AdvisoryBMXAutauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more26 hr
Sep 5, 5:34 AM CDTAreal Flood AdvisoryBMXMontgomery3 hr
Sep 5, 5:54 AM CDTFlash Flood WarningBMXElmore, Montgomery2 hr
Sep 5, 6:19 AM CDTFlash Flood WarningBMXPickens7 hr
Sep 5, 6:20 AM CDTTornado WarningBMXPickens24 min
Sep 5, 6:44 AM CDTFlash Flood WarningBMXLamar4 hr
Sep 5, 6:57 AM CDTFlash Flood WarningBMXLamar7 hr
Sep 5, 7:16 AM CDTFlash Flood WarningBMXFayette, Marion, Walker, Winston8 hr
Sep 5, 9:01 AM CDTAreal Flood WarningBMXLamar60 hr
Sep 5, 9:29 AM CDTRiver Flood WarningBMXGreene, Hale, Marengo, Sumter48 hr
Sep 5, 9:40 AM CDTFlash Flood WarningBMXPickens6 hr
Sep 5, 10:07 AM CDTRiver Flood WarningBMXJefferson, Tuscaloosa, Walker72 hr
Sep 5, 10:07 AM CDTRiver Flood WarningBMXGreene, Hale, Marengo, Sumter, Tuscaloosa59 hr
Sep 5, 10:07 AM CDTRiver Flood WarningBMXGreene, Hale, Marengo5 days
Sep 5, 10:14 AM CDTTornado WarningBMXBullock, Pike13 min
Sep 5, 10:16 AM CDTFlash Flood WarningBMXGreene6 hr
Sep 5, 10:28 AM CDTFlash Flood WarningBMXLamar4 hr
Sep 5, 10:31 AM CDTTornado WarningBMXLee, Macon, Russell29 min
Sep 5, 10:48 AM CDTTornado WarningBMXBibb, Hale, Perry27 min
Sep 5, 10:51 AM CDTTornado WarningBMXLee24 min
Sep 5, 11:11 AM CDTTornado WarningBMXChambers34 min
Sep 5, 11:36 AM CDTFlash Flood WarningBMXTuscaloosa7 hr
Sep 5, 11:39 AM CDTTornado WarningBMXPerry36 min
Sep 5, 12:20 PM CDTTornado WarningBMXDallas25 min
Sep 5, 12:21 PM CDTTornado WarningBMXBullock, Pike24 min
Sep 5, 12:35 PM CDTTornado WarningBMXChilton, Dallas, Perry25 min
Sep 5, 12:40 PM CDTAreal Flood WarningBMXPickens3 hr
Sep 5, 1:00 PM CDTTornado WarningBMXLee, Russell30 min
Sep 5, 1:09 PM CDTFlash Flood WarningBMXJefferson6 hr
Sep 5, 1:27 PM CDTAreal Flood WarningBMXPickens3 hr
Sep 5, 1:47 PM CDTAreal Flood WarningBMXPickens3 hr
Sep 5, 2:27 PM CDTSevere Thunderstorm WarningBMXJefferson48 min
Sep 5, 2:28 PM CDTFlash Flood WarningBMXBlount, Jefferson4 hr
Sep 5, 3:01 PM CDTAreal Flood WarningBMXFayette, Marion, Walker, Winston17 hr
Sep 5, 3:03 PM CDTTornado WarningBMXLee, Macon27 min
Sep 5, 3:26 PM CDTRiver Flood WarningBMXJefferson15 hr
Sep 5, 4:06 PM CDTAreal Flood WarningBMXPickens16 hr
Sep 5, 4:39 PM CDTFlash Flood Warning EmergencyBMXJefferson5 hr
Sep 5, 4:52 PM CDTFlash Flood WarningBMXBibb, Shelby3 hr
Sep 5, 5:08 PM CDTSpecial Weather StatementBMXBlount, Jefferson67 min
Sep 5, 5:12 PM CDTFlash Flood WarningBMXEtowah, St. Clair6 hr
Sep 5, 6:12 PM CDTSpecial Weather StatementBMXBlount, Jefferson78 min
Sep 5, 6:18 PM CDTAreal Flood WarningBMXTuscaloosa6 hr
Sep 5, 6:38 PM CDTFlash Flood WarningBMXBlount3 hr
Sep 5, 6:41 PM CDTHigh Wind WarningBMXBlount, Calhoun, Cherokee, Clay, Cleburne, Etowah and 5 more3 hr

Nearby

Flash Flood Warnings in Alabama, 2011Every flash flood warning in 2011

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.