Alert archive / Alabama / Flash Flood Warnings in 2012

Flash Flood Warning 29, NWS Tallahassee, FL

August 7, 2012Coffee County, Geneva County, Alabama

NWS Tallahassee, FL issued this flash flood warning at Aug 7, 2012, 6:48 AM CDT for Coffee County, Geneva County, Alabama. It was in force for 117 min. 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, 6:48 AM CDT (11:48 UTC)
Expired: Aug 7, 2012, 8:45 AM CDT
In force: 117 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Flood severity: None

Counties Coffee County, AL, Geneva County, AL

What was reported inside it

Time	Report	Where	Remark
Aug 7, 7:07 AM CDT	FLASH FLOOD	Enterprise, AL	SIGNIFICANT FLASH FLOODING ALL OVER THE CITY OF ENTERPRISE ALABAMA AND POINTS NORTH AND EAST. RESCUE OPERATIONS ARE UNDERWAY FOR PEOPLE TRAPPED IN HOUSES AND VEHICLES.
Aug 7, 7:25 AM CDT	FLASH FLOOD	Geneva, AL	FLASH FLOODING REPORTED IN THE CITY OF GENEVA. WATER RUSHING ACROSS AREA ROADS.
Aug 7, 8:30 AM CDT	FLASH FLOOD	Enterprise, AL	ROAD CLOSURES DUE TO HIGH WATER AROUND ENTERPRISE/COFFEE CO... DIXIE DR BETWEEN CHEROKEE AND LESTER, AS WELL AS HWY 27 NEAR LAKEVIEW DR IN THE VICINITY OF THE ENTERPRISE COUNTRY CLUB.

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 00:00Z, 11.8 hours before the alert went out and 179 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2432 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 603 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 81 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.

846 
WGUS52 KTAE 071148
FFWTAE
ALC031-061-071345-
/O.NEW.KTAE.FF.W.0029.120807T1148Z-120807T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

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

* UNTIL 845 AM CDT

* AT 639 AM CDT...THE NATIONAL WEATHER SERVICE HAS DETECTED FLASH    
  FLOODING FROM THUNDERSTORMS OVER THE WARNED AREA. THESE SLOW       
  MOVING STORMS HAVE BEEN PRODUCING RAINFALL RATES OF 1 TO 2 INCHES  
  PER HOUR WITH TOTAL ACCUMULATIONS OF UP TO 5 TO 8 INCHES           
  EXPECTED...WITH THE HIGHEST AMOUNTS IN COFFEE COUNTY.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NEW
  BROCKTON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DON'T DROWN.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

* REPORT FLOODING OR FLOOD DAMAGE TO THE NATIONAL WEATHER SERVICE IN
TALLAHASSEE AT (8 5 0) 9 4 2 8 8 3 3. OR...YOU MAY CONTACT THE
NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT.
THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3144 8606 3144 8579 3121 8580 3108 8574
      3100 8579 3100 8609

$$

17-GOULD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 2:12 AM CDT	Areal Flood Advisory	TAE	Coffee	3 hr
Aug 7, 2:32 AM CDT	Flash Flood Watch	TAE	Coffee, Dale, Geneva, Henry, Houston	24 hr
Aug 7, 5:00 AM CDT	Flash Flood Warning	TAE	Coffee	2 hr
Aug 7, 5:06 AM CDT	Areal Flood Advisory	TAE	Dale, Geneva, Henry, Houston	3 hr
Aug 7, 6:04 AM CDT	Flash Flood Warning	TAE	Coffee, Dale	116 min
Aug 7, 8:33 AM CDT	Flash Flood Warning	TAE	Coffee, Geneva	2 hr
Aug 7, 10:00 AM CDT	River Flood Warning	TAE	Geneva	34 hr

Nearby

Flash Flood Warnings in Alabama, 2012 Every 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.