Alert archive / Alabama / Flash Flood Warnings in 2012

Flash Flood Warning 26, NWS Tallahassee, FL

July 30, 2012Coffee County, Alabama

NWS Tallahassee, FL issued this flash flood warning at Jul 30, 2012, 8:40 PM CDT for Coffee 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: Jul 30, 2012, 8:40 PM CDT (01:40 UTC)
Expired: Jul 30, 2012, 10:45 PM CDT
In force: 2 hr
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Flood severity: None

County Coffee County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.7 hours before the alert went out and 190 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: 771 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 1852 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

092 
WGUS52 KTAE 310140
FFWTAE
ALC031-310345-
/O.NEW.KTAE.FF.W.0026.120731T0140Z-120731T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
840 PM CDT MON JUL 30 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL COFFEE COUNTY IN SOUTHEAST ALABAMA...

* UNTIL 1045 PM CDT

* AT 837 PM CDT...THE NATIONAL WEATHER SERVICE RECEIVED REPORTS OF   
  FLOODING AND ROAD CLOSURES IN HENDERSON...WHICH IS ALONG THE       
  BORDER OF NEIGHBORING PIKE COUNTY. SIMILAR RAINFALL RATES HAVE     
  BEEN REALIZED IN NORTHERN COFFEE COUNTY. ESPECIALLY NEAR BLUFF     
  SPRING...WILKINSTOWN...AND JACK.

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.

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.

* 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 3162 8612 3162 8594 3161 8594 3152 8598
      3153 8614

$$

15-HARRIGAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 7:16 PM CDT	Severe Thunderstorm Warning	TAE	Geneva, Houston	44 min
Jul 30, 7:20 PM CDT	Severe Thunderstorm Warning	TAE	Henry	40 min
Jul 30, 8:00 PM CDT	Areal Flood Advisory	TAE	Coffee	3 hr
Jul 30, 9:41 PM CDT	Areal Flood Advisory	TAE	Coffee	2 hr
Jul 30, 9:44 PM CDT	Severe Thunderstorm Warning	TAE	Coffee, Dale	30 min

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; the sounding from the Mesonet's radiosonde archive.