Alert archive / Florida / Flash Flood Warnings in 2021

Flash Flood Warning 9, NWS Tallahassee, FL

April 24, 20214 counties in Florida

NWS Tallahassee, FL issued this flash flood warning at Apr 24, 2021, 12:34 PM CDT for 4 counties in Florida. It was in force for 3 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 24, 2021, 12:34 PM CDT (17:34 UTC)
Expired
Apr 24, 2021, 3:45 PM CDT
In force
3 hr
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon
Damage threat
Considerable
Flood severity
None

Counties Holmes County, FL, Jackson County, FL, Walton County, FL, Washington County, FL

The radar

The Eglin Afb radar (KEVX), 41 km from the middle of the area, began a volume at 17:35 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
Apr 24, 3:22 PM CDTFLASH FLOOD2 Nne Bonifay, FLROADWAY COVERED IN WATER.

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, 5.6 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 2021-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 175 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 2021-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 447 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
175 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
544 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
447 m²/s²
0-3 km storm-relative helicity
570 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted.

072 
WGUS52 KTAE 241734
FFWTAE
FLC059-063-131-133-242045-
/O.NEW.KTAE.FF.W.0009.210424T1734Z-210424T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tallahassee FL
1234 PM CDT Sat Apr 24 2021

The National Weather Service in Tallahassee has issued a

* Flash Flood Warning for...
  Holmes County in the panhandle of Florida...
  Jackson County in the panhandle of Florida...
  Walton County in the panhandle of Florida...
  Northeastern Washington County in the panhandle of Florida...

* Until 345 PM CDT.

* At 1234 PM CDT, Local law enforcement reported thunderstorms 
  producing heavy rain. Several roads in northern Walton County are 
  impassible due to flash flooding. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Law enforcement.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Bonifay, Chipley, Graceville, Union, Liberty, Paxton, Caryville, 
  Esto, Westville, Campbellton, Noma, Izagora, Gritney, Baker 
  Settlement, Cerrogordo, Barker Store, New Hope, Hickory Hill, 
  Prosperity and Arrant Settlement.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3098 8616 3099 8520 3077 8547 3077 8574
      3078 8639 3081 8639 3087 8639 3088 8639
      3091 8639 3099 8639 3099 8626

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

AH
1 follow-up statement
008 
WGUS72 KTAE 242043
FFSTAE

Flash Flood Statement
National Weather Service Tallahassee FL
343 PM CDT Sat Apr 24 2021

FLC059-063-131-133-242053-
/O.EXP.KTAE.FF.W.0009.000000T0000Z-210424T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Holmes FL-Jackson FL-Walton FL-Washington FL-
343 PM CDT Sat Apr 24 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 345 PM CDT THIS AFTERNOON FOR 
HOLMES, JACKSON, WALTON AND NORTHEASTERN WASHINGTON COUNTIES...

The heavy rain has ended. Additional flash flooding is not expected 
to pose a threat. However, a Flood Warning remains in effect for the 
Shoal River near Mossy Head in Walton County. Please continue to 
heed remaining road closures.

A Flash Flood Watch remains in effect until 100 AM CDT Sunday for 
portions of southeast Alabama...Panhandle Florida and Georgia.

LAT...LON 3098 8616 3099 8520 3077 8547 3077 8574
      3078 8639 3081 8639 3087 8639 3088 8639
      3091 8639 3099 8639 3099 8626

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 24, 12:45 AM CDTFlash Flood WatchTAEHolmes, Jackson, Walton, Washington22 hr
Apr 24, 1:00 AM CDTWind AdvisoryTAEBay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 10 more18 hr
Apr 24, 6:29 AM CDTSevere Thunderstorm WarningTAEHolmes, Walton59 min
Apr 24, 8:14 AM CDTSevere Thunderstorm WarningTAEHolmes, Walton46 min
Apr 24, 8:56 AM CDTSpecial Weather StatementTAEHolmes49 min
Apr 24, 9:01 AM CDTAreal Flood AdvisoryTAEHolmes, Jackson, Walton119 min
Apr 24, 9:39 AM CDTFlash Flood WarningTAEHolmes, Jackson, Walton3 hr
Apr 24, 9:48 AM CDTSpecial Weather StatementTAEJackson42 min
Apr 24, 9:52 AM CDTSevere Thunderstorm WarningTAEJackson, Washington53 min
Apr 24, 9:57 AM CDTTornado WarningTAEJackson, Washington14 min
Apr 24, 10:20 AM CDTSevere Thunderstorm WarningTAECalhoun, Gadsden, Jackson40 min
Apr 24, 10:54 AM CDTSevere Thunderstorm WarningTAEHolmes, Walton, Washington51 min
Apr 24, 10:57 AM CDTSevere Thunderstorm WarningTAEGadsden48 min
Apr 24, 11:09 AM CDTFlash Flood WarningTAEBay, Holmes, Jackson, Walton, Washington3 hr
Apr 24, 11:25 AM CDTSpecial Weather StatementTAELeon50 min
Apr 24, 11:30 AM CDTSevere Thunderstorm WarningTAEGadsden, Jefferson, Leon30 min
Apr 24, 11:41 AM CDTRiver Flood WarningTAEWalton41 hr
Apr 24, 11:41 AM CDTSpecial Weather StatementTAEHolmes64 min
Apr 24, 11:45 AM CDTSevere Thunderstorm WarningTAEGadsden, Leon30 min
Apr 24, 11:53 AM CDTSevere Thunderstorm WarningTAEJefferson, Leon, Madison52 min
Apr 24, 12:03 PM CDTSevere Thunderstorm WarningTAEGadsden, Leon27 min
Apr 24, 12:17 PM CDTFlash Flood Warning Considerable damage threatTAEJackson, Washington3 hr
Apr 24, 12:34 PM CDTSevere Thunderstorm WarningTAEJefferson, Madison41 min
Apr 24, 12:39 PM CDTSevere Thunderstorm WarningTAEJefferson, Leon, Madison51 min
Apr 24, 1:09 PM CDTTornado WarningTAEJefferson, Madison36 min
Apr 24, 1:38 PM CDTTornado WarningTAEMadison19 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.