Alert archive / Alabama / Flash Flood Warnings in 2012

Flash Flood Warning 31, NWS Tallahassee, FL

August 7, 2012Coffee County, Geneva County, Alabama

NWS Tallahassee, FL issued this flash flood warning at Aug 7, 2012, 8:33 AM CDT for Coffee County, Geneva County, Alabama. It was in force for 2 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 7, 2012, 8:33 AM CDT (13:33 UTC)
Expired
Aug 7, 2012, 11:00 AM CDT
In force
2 hr
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon
Flood severity
None

Counties Coffee County, AL, Geneva County, AL

What was reported inside it

TimeReportWhereRemark
Aug 7, 9:27 AM CDTFLASH FLOOD1 Wsw Enterprise, ALWATER COVERING ROADWAY ON W COLLEGE ST.
Aug 7, 9:27 AM CDTFLASH FLOOD4 Ne Geneva, ALEMERGENCY MANAGER REPORTS WATER OVER ROADWAY ON COUNTY ROAD 41 NEAR STATE ST.
Aug 7, 9:27 AM CDTFLASH FLOOD4 N Enterprise, ALHOUSES SURROUNDED BY WATER IN GATEWAY ESTATES

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 1.6 hours before the alert went out and 176 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, Tallahassee Rgnl, FL at 12:00Z on 2012-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1301 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 2012-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 square meters per square second.1939Sfc1 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
1301 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
755 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

072 
WGUS52 KTAE 071333
FFWTAE
ALC031-061-071600-
/O.NEW.KTAE.FF.W.0031.120807T1333Z-120807T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
833 AM CDT TUE AUG 7 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEAST COFFEE COUNTY IN SOUTHEAST ALABAMA...
  GENEVA COUNTY IN SOUTHEAST ALABAMA...

* UNTIL 1100 AM CDT

* AT 825 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH     
  FLOODING FROM PERSISTENT HEAVY RAIN BANDS AND THUNDERSTORMS OVER
  THE WARNED AREA. THE FORT RUCKER HELIPORT HAS MEASURED AS MUCH AS
  8 INCHES OF RAIN OVER THE PAST 12 HOURS...AND RADAR ESTIMATES
  THAT WIDESPREAD RAIN TOTALS OF 4 TO 8 INCHES WITH ISOLATED VALUES
  AS HIGH AS 10 INCHES HAVE OCCURRED. THIS FLASH FLOOD WARNING 
  EXTENDS THE PREVIOUS WARNING.

  RAIN WILL BEGIN TO TAPER OFF IN COFFEE COUNTY BUT FLOODING MAY
  CONTINUE FOR A COUPLE HOURS. ADDITIONAL HEAVY RAINFALL OF 1 TO 3
  INCHES MAY OCCUR IN GENEVA COUNTY THROUGH 10 AM CDT.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NEW        
  BROCKTON...GENEVA...AND ENTERPRISE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER 
GROUND AS QUICKLY AS POSSIBLE.

REPORT FLOODING OR FLOOD DAMAGE TO THE NATIONAL WEATHER SERVICE AT 
(8 5 0) 9 4 2 8 8 3 3. OR...CONTACT LAW ENFORCEMENT.

&&

LAT...LON 3120 8619 3120 8602 3124 8602 3142 8591
      3143 8579 3139 8578 3120 8579 3119 8574
      3108 8572 3105 8561 3099 8560 3099 8597
      3105 8619

$$

08-LAMERS
1 follow-up statement
219 
WGUS72 KTAE 071554
FFSTAE

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1054 AM CDT TUE AUG 7 2012

ALC031-061-071601-
/O.EXP.KTAE.FF.W.0031.000000T0000Z-120807T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COFFEE AL-GENEVA AL-
1054 AM CDT TUE AUG 7 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1100 AM CDT FOR GENEVA AND
SOUTHEAST COFFEE COUNTIES...

RAIN HAS ESSENTIALLY ENDED OVER COFFEE AND GENEVA COUNTIES FOR THE 
TIME BEING...AND HAS BEEN VERY LIGHT FOR THE PAST HOUR OR TWO. 
THEREFORE...THE THREAT FOR FLASH FLOODING HAS LIKELY ENDED.

ADDITIONAL RUNOFF MAY OCCUR INTO THE EARLY AFTERNOON IN AREAS THAT 
RECEIVED THE HEAVIEST RAINFALL...AND A FEW ROADS MAY REMAIN CLOSED. 
REMEMBER...DO NOT DRIVE THROUGH FLOODED ROADWAYS. STANDING OR 
RUNNING WATER ON ROADS AND IN LOW LYING AREAS SHOULD NOT GET ANY 
HIGHER OVER THE NEXT COUPLE HOURS.

LAT...LON 3120 8619 3120 8602 3124 8602 3142 8591
      3143 8579 3139 8578 3120 8579 3119 8574
      3108 8572 3105 8561 3099 8560 3099 8597
      3105 8619

$$

08-LAMERS

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 7, 2:12 AM CDTAreal Flood AdvisoryTAECoffee3 hr
Aug 7, 2:32 AM CDTFlash Flood WatchTAECoffee, Dale, Geneva, Henry, Houston24 hr
Aug 7, 5:00 AM CDTFlash Flood WarningTAECoffee2 hr
Aug 7, 5:06 AM CDTAreal Flood AdvisoryTAEDale, Geneva, Henry, Houston3 hr
Aug 7, 6:04 AM CDTFlash Flood WarningTAECoffee, Dale116 min
Aug 7, 6:48 AM CDTFlash Flood WarningTAECoffee, Geneva117 min
Aug 7, 10:00 AM CDTRiver Flood WarningTAEGeneva34 hr

Nearby

Flash Flood Warnings in Alabama, 2012Every flash flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.