Alert archive / Alabama / Flash Flood Warnings in 2014

Flash Flood Warning 13, NWS Tallahassee, FL

April 29, 2014Geneva County, Alabama

NWS Tallahassee, FL issued this flash flood warning at Apr 29, 2014, 11:56 PM CDT for Geneva County, Alabama. It was in force for 6 hr. 1 report 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: Apr 29, 2014, 11:56 PM CDT (04:56 UTC)
Expired: Apr 30, 2014, 6:00 AM CDT
In force: 6 hr
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Flood severity: None

County Geneva County, AL

The radar

The Eglin Afb radar (KEVX), 65 km from the middle of the area, began a volume at 04:58 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.

What was reported inside it

Time	Report	Where	Remark
Apr 30, 2:40 AM CDT	FLASH FLOOD	Geneva, AL	PORTIONS OF GOATHILL ROAD...NORTH WHITNEY ROAD...AND EAST HEART ROAD ARE FLOODED

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, 4.9 hours before the alert went out and 188 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: 124 J/kg
Mixed-layer CIN: -255 J/kg
Mixed-layer LCL: 1698 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 229 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.

260 
WGUS52 KTAE 300456
FFWTAE
ALC061-301100-
/O.NEW.KTAE.FF.W.0013.140430T0456Z-140430T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1156 PM CDT TUE APR 29 2014

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN GENEVA COUNTY IN SOUTHEAST ALABAMA...
  THIS INCLUDES THE CITY OF GENEVA...

* UNTIL 600 AM CDT WEDNESDAY

* AT 1150 PM CDT...RADAR DETECTED THUNDERSTORMS PRODUCING VERY HEAVY 
  RAIN MOVING INTO WESTERN GENEVA COUNTY. RAINFALL RATES OF 1 TO 3   
  INCHES PER HOUR ARE EXPECTED WITH SEVERAL INCHES OF RAIN LIKELY.   
  FLASH FLOODING IS EXPECTED TO DEVELOP QUICKLY ONCE THE HEAVY RAIN  
  BEGINS GIVEN THE SATURATED SOIL CONDITIONS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SAMSON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE AWAY FROM RISING WATER TO HIGHER GROUND! MOST FLOOD DEATHS OCCUR
IN VEHICLES. DO NOT ATTEMPT TO DRIVE THROUGH FLOODED ROADS.
REMEMBER...TURN AROUND...DON'T DROWN.

&&

LAT...LON 3119 8620 3119 8613 3118 8612 3119 8612
      3120 8602 3119 8571 3099 8588 3099 8619
      3101 8620

$$

42-DVD

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 29, 11:07 PM CDT	Severe Thunderstorm Warning	TAE	Dale	38 min
Apr 29, 11:29 PM CDT	Flash Flood Warning	TAE	Coffee, Dale	4 hr
Apr 30, 1:20 AM CDT	Flash Flood Warning	TAE	Geneva	6 hr
Apr 30, 1:27 AM CDT	Severe Thunderstorm Warning	TAE	Geneva, Houston	63 min
Apr 30, 1:49 AM CDT	Flash Flood Warning	TAE	Houston	5 hr
Apr 30, 1:53 AM CDT	Tornado Warning	TAE	Houston	37 min
Apr 30, 2:23 AM CDT	Tornado Warning	TAE	Houston	37 min
Apr 30, 2:26 AM CDT	Severe Thunderstorm Warning	TAE	Houston	64 min
Apr 30, 4:37 AM CDT	River Flood Warning	TAE	Dale	57 hr
Apr 30, 4:37 AM CDT	River Flood Warning	TAE	Geneva	4 days
Apr 30, 9:50 AM CDT	Severe Thunderstorm Warning	TAE	Dale, Henry	25 min
Apr 30, 12:05 PM CDT	Wind Advisory	TAE	Coffee, Dale, Geneva, Henry, Houston	5 hr
Apr 30, 12:49 PM CDT	Severe Thunderstorm Warning	TAE	Houston	26 min

Nearby

Flash Flood Warnings in Alabama, 2014 Every flash flood warning in 2014

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; radar from the NEXRAD Level II archive.