Alert archive / Alabama / Flash Flood Warnings in 2016

Flash Flood Warning 3, NWS Tallahassee, FL

March 31, 2016Geneva County, Houston County, Alabama

NWS Tallahassee, FL issued this flash flood warning at Mar 31, 2016, 3:38 PM CDT for Geneva County, Houston County, Alabama. It was in force for 112 min. 4 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
Mar 31, 2016, 3:38 PM CDT (20:38 UTC)
Expired
Mar 31, 2016, 5:30 PM CDT
In force
112 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon
Flood severity
None

Counties Geneva County, AL, Houston County, AL

The radar

The Ft Rucker radar (KEOX), 29 km from the middle of the area, began a volume at 20:40 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

TimeReportWhereRemark
Mar 31, 5:00 PM CDTFLASH FLOOD5 S Dothan, ALTHIRD AVENUE CLOSE TO THE INTERSECTION OF HODGESVILLE ROAD IS REPORTED UNDERWATER.
Mar 31, 5:00 PM CDTHEAVY RAIN 4.25Slocomb, ALPUBLIC REPORT OF 4.25 INCHES OF RAIN IN 3 HOURS IN SLOCOMB
Mar 31, 5:10 PM CDTFLASH FLOOD1 N Taylor, ALWATER COVERING ROADWAY
Mar 31, 5:10 PM CDTFLASH FLOODNe Taylor, ALWATER COVERING ROADWAY

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, 8.6 hours before the alert went out and 150 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 2016-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 53 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 2016-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.19395878Sfc1 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
53 J/kg
Mixed-layer CIN
-640 J/kg
Mixed-layer LCL
1024 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
203 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

584 
WGUS52 KTAE 312038
FFWTAE
ALC061-069-312230-
/O.NEW.KTAE.FF.W.0003.160331T2038Z-160331T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
338 PM CDT THU MAR 31 2016

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HOUSTON COUNTY IN SOUTHEASTERN ALABAMA...
  EASTERN GENEVA COUNTY IN SOUTHEASTERN ALABAMA...

* UNTIL 530 PM CDT

* AT 337 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. A RAIN GAUGE IN WESTERN GENEVA
  COUNTY MEASURED 2.72 INCHES OF RAIN IN ONE HOUR AND THIS HEAVY
  RAINFALL IS SPREADING EASTWARD. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  COTTONWOOD...DOTHAN...HARTFORD...TAYLOR...ASHFORD...SLOCOMB...COWARTS...
  WEBB...KINSEY...MALVERN...REHOBETH...AVON...MADRID...MEMPHIS...GREEN
  ACRES...ARDILLA...SMYRNA...SOUTHERN JUNCTION...HODGESVILLE AND JONES
  CROSSROADS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS
WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

&&

LAT...LON 3121 8569 3123 8569 3125 8567 3127 8566
      3128 8561 3125 8554 3124 8549 3128 8548
      3130 8514 3104 8514 3101 8569 3120 8570

$$

42-DVD

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 31, 2:10 PM CDTSevere Thunderstorm WarningTAECoffee, Geneva50 min
Mar 31, 2:29 PM CDTFlash Flood WatchTAECoffee, Dale, Geneva, Henry, Houston39 hr
Mar 31, 2:49 PM CDTSevere Thunderstorm WarningTAEGeneva41 min
Mar 31, 3:04 PM CDTFlash Flood WarningTAEGeneva116 min
Mar 31, 4:44 PM CDTSevere Thunderstorm WarningTAEHouston46 min
Mar 31, 4:57 PM CDTFlash Flood WarningTAEGeneva63 min

Nearby

Flash Flood Warnings in Alabama, 2016Every flash flood warning in 2016

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.