Alert archive / Alabama / Flash Flood Warnings in 2016

Flash Flood Warning 4, NWS Tallahassee, FL

March 31, 2016Geneva County, Alabama

NWS Tallahassee, FL issued this flash flood warning at Mar 31, 2016, 4:57 PM CDT for Geneva County, Alabama. It was in force for 63 min. 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
Mar 31, 2016, 4:57 PM CDT (21:57 UTC)
Expired
Mar 31, 2016, 6:00 PM CDT
In force
63 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon
Flood severity
None

County Geneva County, AL

The radar

The Ft Rucker radar (KEOX), 61 km from the middle of the area, began a volume at 21:58 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

TimeReportWhereRemark
Mar 31, 5:00 PM CDTHEAVY RAIN 4.25Slocomb, ALPUBLIC REPORT OF 4.25 INCHES OF RAIN IN 3 HOURS IN SLOCOMB

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, 10.0 hours before the alert went out and 182 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.

361 
WGUS52 KTAE 312157
FFWTAE
ALC061-312300-
/O.NEW.KTAE.FF.W.0004.160331T2157Z-160331T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

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

* UNTIL 600 PM CDT

* AT 456 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS CONTINUED TO
  REPORT FLOODING ACROSS GENEVA COUNTY. OVER THREE INCHES OF RAIN
  HAVE ALREADY FALLEN. ALTHOUGH RAINFALL IS GRADUALLY TAPERING
  OFF...FLASH FLOODING IS EXPECTED TO CONTINUE THROUGH 6 PM CDT AS
  EXCESS WATER RUNS OFF.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  GENEVA...HARTFORD...SLOCOMB...SAMSON...MALVERN...COFFEE SPRINGS...BLACK...
  SOMERSET...PINEY GROVE...PERA...LYTLE...SELLERSVILLE...FADETTE...KELLYS
  CROSSROADS...MARL...EUNOLA...WEEKS...LOGAN FIELD MUNICIPAL A/P...GENEVA
  MUNICIPAL A/P AND LIGHT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3119 8619 3119 8613 3118 8612 3119 8611
      3120 8600 3120 8549 3100 8549 3100 8619

$$

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, 3:38 PM CDTFlash Flood WarningTAEGeneva, Houston112 min
Mar 31, 4:44 PM CDTSevere Thunderstorm WarningTAEHouston46 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.