Alert archive / Florida / Flash Flood Warnings in 2021

Flash Flood Warning 51, NWS Tallahassee, FL

October 7, 2021Gulf County, Florida

NWS Tallahassee, FL issued this flash flood warning at Oct 7, 2021, 9:04 AM CDT for Gulf County, Florida. 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
Oct 7, 2021, 9:04 AM CDT (14:04 UTC)
Expired
Oct 7, 2021, 11:30 AM CDT
In force
2 hr
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon
Flood severity
None

County Gulf County, FL

The radar

The Eglin Afb radar (KEVX), 107 km from the middle of the area, began a volume at 14:04 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.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 2.1 hours before the alert went out and 114 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 2021-10-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 980 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 2021-10-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.193958Sfc1 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
980 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
842 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
144 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

397 
WGUS52 KTAE 071404
FFWTAE
FLC045-071630-
/O.NEW.KTAE.FF.W.0051.211007T1404Z-211007T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tallahassee FL
904 AM CDT Thu Oct 7 2021

The National Weather Service in Tallahassee has issued a

* Flash Flood Warning for...
  Central Gulf County in the panhandle of Florida...

* Until 1130 AM CDT /1230 PM EDT/.

* At 904 AM CDT /1004 AM EDT/, Doppler radar indicated thunderstorms 
  producing heavy rain across the warned area. Between 1 and 2 
  inches of rain have fallen in the last hour. The expected rainfall 
  rate is 2 to 3 inches pre hour. Additional rainfall amounts of 2 
  to 4 inches are possible in the warned area. Flash flooding is 
  ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Port St. Joe, Milltown, Ward Ridge, Highland View, Jones 
  Homestead, Odena, Simmons Bayou, Dalkeith and Indian Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Move to higher ground now. Act quickly to protect your life.

Stay away or be swept away. River banks and culverts can become 
unstable and unsafe.

&&

LAT...LON 2967 8534 2974 8534 2980 8535 2994 8529
      3009 8525 3004 8517 2995 8508 2979 8510
      2970 8522 2968 8522 2966 8523 2967 8531
      2964 8535

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-3 INCHES IN 1 HOUR

$$

WD

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 6, 8:49 PM CDTRiver Flood WarningTAECalhoun, Franklin, Gulf, Liberty6 days
Oct 7, 2:34 AM CDTDense Fog AdvisoryTAEMadison5 hr
Oct 7, 3:15 AM CDTSpecial Weather StatementTAEWashington45 min
Oct 7, 3:23 AM CDTTornado WarningTAEBay20 min
Oct 7, 3:27 AM CDTFlash Flood WarningTAEBay3 hr
Oct 7, 3:49 AM CDTSpecial Marine WarningTAE26 min
Oct 7, 3:54 AM CDTSpecial Weather StatementTAEBay66 min
Oct 7, 5:05 AM CDTSpecial Weather StatementTAEBay55 min
Oct 7, 5:12 AM CDTFlash Flood WarningTAEBay, Washington3 hr
Oct 7, 5:34 AM CDTFlash Flood Warning Considerable damage threatTAEBay3 hr
Oct 7, 5:56 AM CDTTornado WarningTAEBay34 min
Oct 7, 6:27 AM CDTFlash Flood Warning Considerable damage threatTAEBay2 hr
Oct 7, 6:44 AM CDTFlash Flood WarningTAEBay3 hr
Oct 7, 6:45 AM CDTTornado WarningTAEBay15 min
Oct 7, 7:52 AM CDTFlash Flood WarningTAEBay, Calhoun, Gulf2 hr
Oct 7, 8:18 AM CDTSpecial Marine WarningTAE42 min
Oct 7, 8:32 AM CDTAreal Flood WarningTAEBay, Washington10 hr
Oct 7, 10:29 AM CDTAreal Flood WarningTAEBay, Calhoun, Gulf9 hr
Oct 7, 11:17 AM CDTRip Current StatementTAEBay, Franklin, Gulf, Walton14 hr
Oct 7, 2:40 PM CDTSpecial Marine WarningTAE35 min

Nearby

Flash Flood Warnings in Florida, 2021Every flash flood warning in 2021

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; radar from the NEXRAD Level II archive.