Alert archive / Florida / Flash Flood Warnings in 2014

Flash Flood Warning 18, NWS Mobile, AL

April 14, 2014Okaloosa County, Santa Rosa County, Florida

NWS Mobile, AL issued this flash flood warning at Apr 14, 2014, 10:54 PM CDT for Okaloosa County, Santa Rosa County, 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 14, 2014, 10:54 PM CDT (03:54 UTC)
Expired
Apr 15, 2014, 1:45 AM CDT
In force
3 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Okaloosa County, FL, Santa Rosa County, FL

The radar

The Eglin Afb radar (KEVX), 71 km from the middle of the area, began a volume at 03:54 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 15, 12:00 AM CDTFLASH FLOODFort Walton Beach, FLGAP CREEK BRIDGE, GREEN ACRES ROAD, AND LOYD STREET CLOSED IN FT. WALTON BEACH DUE TO FLOODING. HWY 98 AT CODY AVE NEAR HURLBURT FIELD ALSO CLOSED.

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, 3.9 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 00:00Z on 2014-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 127 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 00:00Z on 2014-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 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
127 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
840 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
58 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

769 
WGUS54 KMOB 150354
FFWMOB
FLC091-113-150645-
/O.NEW.KMOB.FF.W.0018.140415T0354Z-140415T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1054 PM CDT MON APR 14 2014

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN OKALOOSA COUNTY IN NORTHWEST FLORIDA...
  SOUTHEASTERN SANTA ROSA COUNTY IN NORTHWEST FLORIDA...

* UNTIL 145 AM CDT

* AT 1048 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED   
  SHOWERS AND THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL OVER 
  MUCH OF SOUTHEASTERN OKALOOSA AND SANTA ROSA COUNTIES. RADAR
  ESTIMATES SHOW THAT 2 TO 3 INCHES OF RAIN HAS FALLEN AND 
  ADDITIONAL HEAVY RAINS WILL SPREAD OVER THE WARNED AREA DURING
  THE NEXT HOUR. EXCESSIVE RUNOFF WILL LIKELY CAUSE FLASH FLOODING IN 
  THE WARNED AREA.

* LOCATIONS IMPACTED INCLUDE...
  MIDWAY...             OCEAN CITY...         FORT WALTON BEACH...
  WOODLAWN BEACH...     TIGER POINT...        NAVARRE BEACH...
  SHALIMAR...           LAKE LORRAINE...      CINCO BAYOU...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS FLOODING IS IMMINENT OR OCCURRING. SEEK
HIGHER GROUND IMMEDIATELY. DO NOT DRIVE OR WALK INTO AREAS WHERE
WATER CROSSES A ROAD. TURN AROUND - DON'T DROWN!

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3036 8712 3039 8690 3039 8687 3038 8692
      3037 8692 3039 8659 3037 8640 3038 8639
      3041 8640 3042 8644 3042 8649 3040 8653
      3042 8659 3048 8646 3044 8642 3045 8639
      3098 8639 3098 8656 3051 8663 3039 8713

$$
1 follow-up statement
699 
WGUS74 KMOB 150643
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
143 AM CDT TUE APR 15 2014

FLC091-113-150652-
/O.EXP.KMOB.FF.W.0018.000000T0000Z-140415T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OKALOOSA FL-SANTA ROSA FL-
143 AM CDT TUE APR 15 2014

...THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 145 AM CDT 
FOR SOUTHEASTERN SANTA ROSA AND SOUTHEASTERN OKALOOSA COUNTIES...BUT 
WILL BE REPLACED WITH AN AREAL FLOOD WARNING...

AT 144 AM CDT...THE HEAVY RAINFALL THAT PROMPTED THE WARNING FOR 
SOUTHEASTERN SANTA ROSA AND SOUTHEASTERN OKALOOSA COUNTIES HAS 
SUBSIDED SUFFICIENTLY THAT THE THREAT OF FLASH FLOODING HAS ENDED.  
HOWEVER...A NEW AREAL FLOOD WARNING WILL BE ISSUED WILL COVER MUCH 
OF THE WARNED AREA TO ALLOW FOR POOR DRAINAGE AREAS TO DRAIN.

LAT...LON 3036 8712 3039 8690 3039 8687 3038 8692
      3037 8692 3039 8659 3037 8640 3038 8639
      3041 8640 3042 8644 3042 8649 3040 8653
      3042 8659 3048 8646 3044 8642 3045 8639
      3098 8639 3098 8656 3051 8663 3039 8713

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 14, 8:28 PM CDTSevere Thunderstorm WarningMOBEscambia, Santa Rosa62 min
Apr 14, 8:48 PM CDTFlash Flood WarningMOBEscambia, Santa Rosa117 min
Apr 14, 8:50 PM CDTSevere Thunderstorm WarningMOBOkaloosa55 min
Apr 14, 10:06 PM CDTFlash Flood WarningMOBEscambia, Okaloosa, Santa Rosa3 hr
Apr 14, 10:45 PM CDTAreal Flood WarningMOBEscambia, Santa Rosa6 hr
Apr 15, 1:09 AM CDTAreal Flood WarningMOBEscambia, Okaloosa, Santa Rosa6 hr
Apr 15, 1:46 AM CDTAreal Flood WarningMOBOkaloosa, Santa Rosa6 hr
Apr 15, 2:08 AM CDTRiver Flood WarningMOBOkaloosa65 hr
Apr 15, 4:49 AM CDTFreeze WatchMOB9 hr
Apr 15, 4:49 AM CDTWind AdvisoryMOB13 hr
Apr 15, 9:30 AM CDTRiver Flood WarningMOBEscambia14 hr

Nearby

Flash Flood Warnings in Florida, 2014Every flash flood warning in 2014

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.