Alert archive / Florida / Flash Flood Warnings in 2011

Flash Flood Warning 17, NWS Mobile, AL

March 9, 2011Okaloosa County, Florida

NWS Mobile, AL issued this flash flood warning at Mar 9, 2011, 11:03 AM CST for Okaloosa County, Florida. It was in force for 5 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
Mar 9, 2011, 11:03 AM CST (17:03 UTC)
Expired
Mar 9, 2011, 4:14 PM CST
In force
5 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 69 km from the middle of the area, began a volume at 17:06 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 9, 2:59 PM CSTFLASH FLOODCrestview, FLOLD ANTIOCH RD. AT HWY 85 IMPASSABLE DUE TO STANDING 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, 5.1 hours before the alert went out and 225 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 2011-03-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2011-03-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 348 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
611 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
348 m²/s²
0-3 km storm-relative helicity
471 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

514 
WGUS54 KMOB 091703
FFWMOB
FLC091-092300-
/O.NEW.KMOB.FF.W.0017.110309T1703Z-110309T2300Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1103 AM CST WED MAR 9 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  OKALOOSA COUNTY IN NORTHWEST FLORIDA...
  THIS INCLUDES THE CITY OF CRESTVIEW...

* UNTIL 500 PM CST

* AT 1100 AM CST...NATIONAL WEATHER SERVICE RADAR INDICATED VERY
  HEAVY RAIN FROM A LINE OF THUNDERSTORMS MOVING ACROSS OKALOOSA
  COUNTY.  THESE STORMS HAVE BEEN PRODUCING AS MUCH AS 3 INCHES OF
  RAIN IN A SHORT AMOUNT OF TIME...AND ADDITIONAL RAINFALL AMOUNTS
  OF 2 TO 3 INCHES WILL OCCUR AS STORMS CONTINUE TO MOVE ACROSS
  THE AREA.  THIS WILL QUICKLY RESULT IN FLASH FLOODING.

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...DONT DROWN.

TO REPORT FLASH FLOODING TO YOUR NATIONAL WEATHER SERVICE...CALL TOLL
FREE AT 1 8 7 7 6 3 3 6 7 7 2.

LAT...LON 3052 8679 3100 8678 3099 8638 3054 8638

$$
2 follow-up statements
735 
WGUS74 KMOB 092106
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
306 PM CST WED MAR 9 2011

FLC091-092300-
/O.CON.KMOB.FF.W.0017.000000T0000Z-110309T2300Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OKALOOSA FL-
306 PM CST WED MAR 9 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM CST FOR
OKALOOSA COUNTY...

AT 301 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES 
THAT UP TO 3 TO 5 INCHES OF RAIN FELL OVER THE AREA.  THE 
INTERSECTION OF OLD ANTIOCH ROAD AND HIGHWAY 84 IN CRESTVIEW IS 
CURRENTLY IMPASSABLE DUE TO HIGH WATER.  THE FLASH FLOOD WARNING 
CONTINUES IN EFFECT UNTIL THE HEAVY RAINS FINISHING DRAINING OFF.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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...DONT DROWN.

&&

LAT...LON 3052 8679 3100 8678 3099 8638 3054 8638

$$
397 
WGUS74 KMOB 092214 RRA
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
414 PM CST WED MAR 9 2011

FLC091-092225-
/O.CAN.KMOB.FF.W.0017.000000T0000Z-110309T2300Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OKALOOSA FL-
414 PM CST WED MAR 9 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR OKALOOSA COUNTY...

AT 411 PM CST...REPORTS FROM EMERGENCY MANAGEMENT AND LOCAL LAW 
ENFORCEMENT INDICATE THAT ANY AREAS THAT FLOODED HAVE SINCE 
SUBSIDED...THUS THE FLASH FLOOD WARNING HAS BEEN CANCELLED.

LAT...LON 3052 8679 3100 8678 3099 8638 3054 8638

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 9, 9:02 AM CSTSevere Thunderstorm WarningMOBEscambia, Santa Rosa58 min
Mar 9, 9:10 AM CSTSevere Thunderstorm WarningMOBOkaloosa, Santa Rosa65 min
Mar 9, 9:10 AM CSTTornado WarningMOBEscambia50 min
Mar 9, 9:16 AM CSTTornado WarningMOBEscambia44 min
Mar 9, 9:25 AM CSTFlash Flood WarningMOBEscambia, Santa Rosa6 hr
Mar 9, 9:26 AM CSTTornado WarningMOBEscambia, Santa Rosa49 min
Mar 9, 9:40 AM CSTTornado WarningMOBEscambia, Santa Rosa50 min
Mar 9, 10:09 AM CSTSevere Thunderstorm WarningMOBEscambia, Okaloosa, Santa Rosa66 min
Mar 9, 10:17 AM CSTFlash Flood WarningMOBSanta Rosa6 hr
Mar 9, 10:30 AM CSTTornado WarningMOBOkaloosa, Santa Rosa32 min
Mar 9, 11:10 AM CSTSevere Thunderstorm WarningMOBOkaloosa65 min
Mar 9, 11:14 AM CSTTornado WarningMOBEscambia, Santa Rosa61 min
Mar 9, 11:41 AM CSTTornado WarningMOBOkaloosa26 min
Mar 9, 11:48 AM CSTFlash Flood WarningMOBOkaloosa, Santa Rosa4 hr
Mar 9, 12:16 PM CSTTornado WarningMOBOkaloosa, Santa Rosa26 min

Nearby

Flash Flood Warnings in Florida, 2011Every flash flood warning in 2011

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.