Alert archive / Florida / Flash Flood Warnings in 2015

Flash Flood Warning 2, NWS Mobile, AL

April 13, 2015Escambia County, Florida; Baldwin County, Alabama

NWS Mobile, AL issued this flash flood warning at Apr 13, 2015, 2:51 AM CDT for Escambia County, Florida; Baldwin County, Alabama. It was in force for 6 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
Apr 13, 2015, 2:51 AM CDT (07:51 UTC)
Expired
Apr 13, 2015, 8:45 AM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Baldwin County, AL, Escambia County, FL

The radar

The Mobile radar (KMOB), 88 km from the middle of the area, began a volume at 07:52 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 00:00Z, 7.9 hours before the alert went out and 220 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 00:00Z on 2015-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 662 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 00:00Z on 2015-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 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
662 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
534 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
208 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.

258 
WGUS54 KMOB 130751
FFWMOB
ALC003-FLC033-131345-
/O.NEW.KMOB.FF.W.0002.150413T0751Z-150413T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
251 AM CDT MON APR 13 2015

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN BALDWIN COUNTY IN SOUTHWESTERN ALABAMA...
  SOUTH ESCAMBIA COUNTY IN NORTHWESTERN FLORIDA...

* UNTIL 845 AM CDT

* AT 250 AM CDT...VERY HEAVY RAINFALL WAS INDICATED OVER THE WARNED
  AREA AND RADAR ESTIMATES SHOW 2 TO 3 INCHES OF RAINFALL HAS
  OCCURRED OVER THE PAST HOUR.  THIS WILL LIKELY CAUSE FLASH FLOODING
  IN THE WARNED AREA.

* LOCATIONS IMPACTED INCLUDE...
  PENSACOLA...           FOLEY...               ORANGE BEACH...
  MYRTLE GROVE...        BELLVIEW...            WEST PENSACOLA...
  WARRINGTON...          ELBERTA...             PERDIDO BEACH...
  LILLIAN...             BON SECOUR...          PERDIDO KEY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3033 8776 3059 8762 3049 8732 3040 8723
      3037 8732 3032 8721 3032 8728 3033 8730
      3034 8727 3034 8731 3032 8732 3033 8734
      3032 8735 3031 8742 3030 8741 3025 8769

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 13, 1:47 AM CDTFlash Flood WatchMOB17 hr
Apr 12, 8:21 PM CDTAreal Flood AdvisoryMOBMobile3 hr
Apr 12, 8:39 PM CDTFlash Flood WarningMOBMobile6 hr
Apr 12, 10:46 PM CDTSpecial Marine WarningMOB89 min
Apr 13, 5:27 AM CDTAreal Flood WarningMOBMobile6 hr
Apr 13, 12:04 PM CDTSpecial Marine WarningMOB86 min
Apr 13, 1:20 PM CDTAreal Flood WarningMOBMobile6 hr
Apr 13, 3:25 PM CDTSpecial Marine WarningMOB95 min

Nearby

Flash Flood Warnings in Florida, 2015Flash Flood Warnings in Alabama, 2015Every flash flood warning in 2015

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.