Alert archive / Florida / Flash Flood Warnings in 2012

Flash Flood Warning 1, NWS Tallahassee, FL

February 18, 20124 counties in Florida

NWS Tallahassee, FL issued this flash flood warning at Feb 18, 2012, 7:57 PM CST for 4 counties in Florida. It was in force for 2 hr. 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: Feb 18, 2012, 7:57 PM CST (01:57 UTC)
Expired: Feb 18, 2012, 10:00 PM CST
In force: 2 hr
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Flood severity: None

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

The radar

The Eglin Afb radar (KEVX), 54 km from the middle of the area, began a volume at 02:00 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

Time	Report	Where	Remark
Feb 18, 8:15 PM CST	FLOOD	Cottondale Airport, FL	ROADS UNDERWATERAT HIGHWAY 90 COTTONDALE AND OLD US ROAD 162 NORTH. POWER LINE REPORTED DOWN.
Feb 18, 8:15 PM CST	FLASH FLOOD	Cottondale, FL	ROADS UNDERWATER AT HIGHWAY 90 AND OLD US ROAD 162 NORTH. POWER LINE ALSO REPORTED DOWN.
Feb 18, 9:01 PM CST	FLOOD	Bonifay, FL	SEVERAL ROADS ACROSS THE COUNTY IMPASSABLE DUE TO FLOODING.
Feb 18, 9:01 PM CST	FLASH FLOOD	Bonifay, FL	SEVERAL ROADS ACROSS HOLMES COUNTY IMPASSABLE DUE TO FLOODING.

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 00:00Z, 2.0 hours before the alert went out and 121 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 566 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 378 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

988 
WGUS52 KTAE 190157
FFWTAE
FLC059-063-131-133-190400-
/O.NEW.KTAE.FF.W.0001.120219T0157Z-120219T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
757 PM CST SAT FEB 18 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HOLMES COUNTY IN THE PANHANDLE OF FLORIDA...
  NORTHERN JACKSON COUNTY IN THE PANHANDLE OF FLORIDA...
  NORTHEASTERN WALTON COUNTY IN THE PANHANDLE OF FLORIDA...
  NORTHERN WASHINGTON COUNTY IN THE PANHANDLE OF FLORIDA...

* UNTIL 1000 PM CST

* AT 750 PM CST...FLASH FLOODING WAS REPORTED FROM THUNDERSTORMS OVER
  THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MARIANNA...
  DE FUNIAK SPRINGS...CHIPLEY AND BONIFAY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE WARNED 
AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DON'T DROWN.

* REPORT FLOODING OR FLOOD DAMAGE TO THE NATIONAL WEATHER SERVICE IN
TALLAHASSEE AT (8 5 0) 9 4 2 8 8 3 3. OR...YOU MAY CONTACT THE
NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT.
THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3077 8495 3067 8619 3098 8619 3100 8502

$$

52-LANIER

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 18, 6:41 PM CST	Severe Thunderstorm Warning	TAE	Holmes, Walton	49 min
Feb 18, 6:49 PM CST	Areal Flood Advisory	TAE	Holmes, Walton	3 hr
Feb 18, 7:17 PM CST	Severe Thunderstorm Warning	TAE	Holmes, Jackson, Washington	43 min
Feb 18, 7:34 PM CST	Severe Thunderstorm Warning	TAE	Jackson	41 min
Feb 18, 8:45 PM CST	Special Marine Warning	TAE		2 hr
Feb 18, 8:50 PM CST	Severe Thunderstorm Warning	TAE	Jackson	40 min
Feb 18, 9:41 PM CST	Flash Flood Warning	TAE	Holmes, Jackson, Walton, Washington	4 hr
Feb 18, 10:38 PM CST	Special Marine Warning	TAE		112 min
Feb 19, 12:15 AM CST	Areal Flood Advisory	TAE	Leon	60 min
Feb 19, 1:20 AM CST	Areal Flood Advisory	TAE	Leon	85 min

Nearby

Flash Flood Warnings in Florida, 2012 Every flash flood warning in 2012

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.