Alert archive / Florida / Flash Flood Warnings in 2021

Flash Flood Warning 42, NWS Tallahassee, FL

October 5, 2021Bay County, Washington County, Florida

NWS Tallahassee, FL issued this flash flood warning at Oct 5, 2021, 4:08 AM CDT for Bay County, Washington County, Florida. It was in force for 3 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 5, 2021, 4:08 AM CDT (09:08 UTC)
Expired: Oct 5, 2021, 7:00 AM CDT
In force: 3 hr
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Flood severity: None

Counties Bay County, FL, Washington County, FL

The radar

The Eglin Afb radar (KEVX), 24 km from the middle of the area, began a volume at 09:09 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 00:00Z, 9.1 hours before the alert went out and 155 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: 682 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 959 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

188 
WGUS52 KTAE 050908
FFWTAE
FLC005-133-051200-
/O.NEW.KTAE.FF.W.0042.211005T0908Z-211005T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tallahassee FL
408 AM CDT Tue Oct 5 2021

The National Weather Service in Tallahassee has issued a

* Flash Flood Warning for...
  Northwestern Bay County in the panhandle of Florida...
  Southwestern Washington County in the panhandle of Florida...

* Until 700 AM CDT.

* At 408 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen in the last 1 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...
  Panama City Beach, Ebro, West Bay, Laird, Gulf Resort Beach, 
  Sunnyside, Laguna Beach, Hollywood Beach, Bid-a-Wee, Bahama Beach, 
  Seminole Hills, Edgewater Gulf Beach, Pine Log, West Panama City 
  and Gulf Lagoon Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3027 8597 3027 8596 3028 8597 3041 8597
      3045 8593 3044 8593 3044 8592 3044 8590
      3046 8590 3046 8589 3047 8589 3047 8588
      3038 8579 3015 8578 3012 8589 3017 8597

FLASH FLOOD...RADAR INDICATED

$$

JM

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 5, 12:11 AM CDT	Special Marine Warning	TAE		49 min
Oct 5, 12:14 AM CDT	Special Weather Statement	TAE	Bay	61 min
Oct 5, 2:25 AM CDT	Special Marine Warning	TAE		50 min
Oct 5, 3:23 AM CDT	Special Marine Warning	TAE		37 min
Oct 5, 3:34 AM CDT	Areal Flood Advisory	TAE	Bay, Washington	34 min
Oct 5, 3:36 AM CDT	Areal Flood Advisory	TAE	Walton	3 hr
Oct 5, 3:59 AM CDT	Special Marine Warning	TAE		46 min
Oct 5, 4:02 AM CDT	Special Marine Warning	TAE		58 min
Oct 5, 4:43 AM CDT	Flash Flood Warning	TAE	Bay	3 hr
Oct 5, 5:33 AM CDT	Areal Flood Advisory	TAE	Bay	3 hr
Oct 5, 5:52 AM CDT	Special Marine Warning	TAE		83 min
Oct 5, 7:49 AM CDT	Areal Flood Advisory	TAE	Franklin, Wakulla	116 min
Oct 5, 9:12 AM CDT	Areal Flood Advisory	TAE	Wakulla	2 hr
Oct 5, 10:20 AM CDT	Rip Current Statement	TAE	Bay, Franklin, Gulf, Walton	12 hr
Oct 5, 12:33 PM CDT	Special Marine Warning	TAE		58 min
Oct 5, 1:48 PM CDT	Special Marine Warning	TAE		87 min

Nearby

Flash Flood Warnings in Florida, 2021 Every 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.