Alert archive / Florida / Flash Flood Warnings in 2012

Flash Flood Warning 23, NWS Mobile, AL

July 6, 2012Santa Rosa County, Florida

NWS Mobile, AL issued this flash flood warning at Jul 6, 2012, 7:01 AM CDT for Santa Rosa County, Florida. It was in force for 119 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 6, 2012, 7:01 AM CDT (12:01 UTC)
Expired
Jul 6, 2012, 9:00 AM CDT
In force
119 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Santa Rosa County, FL

The radar

The Eglin Afb radar (KEVX), 114 km from the middle of the area, began a volume at 12:01 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 0.0 hours before the alert went out and 250 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, Slidell Radar S, LA at 12:00Z on 2012-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1800 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, Slidell Radar S, LA at 12:00Z on 2012-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 square meters per square second.1939Sfc1 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
1800 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
922 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
26 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.

493 
WGUS54 KMOB 061201
FFWMOB
FLC113-061400-
/O.NEW.KMOB.FF.W.0023.120706T1201Z-120706T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
701 AM CDT FRI JUL 6 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 900 AM CDT

* AT 652 AM CDT...VERY HEAVY RAINFALL WAS INDICATED OVER EXTREME 
  SOUTHERN SANTA ROSA COUNTY. BROADCAST MEDIA REPORTS WATERING
  ENTERING INTO BUSINESSES 3 MILES EAST OF TIGER POINT. RADAR 
  ESTIMATES SHOW 2 TO 3 INCHES OF RAINFALL HAS OCCURRED OVER 
  THE PAST HOUR AND AN ADDITIONAL 1 TO 2 INCHES IS POSSIBLE OVER
  THE NEXT HOUR. THIS WILL LIKELY CAUSE ADDITIONAL FLASH FLOODING
  IN THE WARNED AREA.

* LOCATIONS IMPACTED INCLUDE...
  MIDWAY...             WOODLAWN BEACH...     TIGER POINT...
  ORIOLE BEACH...       GULF BREEZE...

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!

&&

LAT...LON 3036 8721 3038 8716 3037 8715 3038 8714
      3041 8708 3040 8706 3042 8699 3045 8695
      3039 8692 3037 8709 3034 8718

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 4:47 AM CDTSevere Thunderstorm WarningMOBOkaloosa, Santa Rosa43 min
Jul 6, 5:24 AM CDTAreal Flood AdvisoryMOBSanta Rosa66 min
Jul 6, 6:24 AM CDTAreal Flood AdvisoryMOBEscambia, Okaloosa, Santa Rosa2 hr
Jul 6, 6:39 AM CDTSevere Thunderstorm WarningMOBEscambia, Santa Rosa51 min

Nearby

Flash Flood Warnings in Florida, 2012Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.