Alert archive / Alabama / Flash Flood Warnings in 2013

Flash Flood Warning 23, NWS Mobile, AL

June 28, 2013Covington County, Alabama

NWS Mobile, AL issued this flash flood warning at Jun 28, 2013, 11:33 PM CDT for Covington County, Alabama. It was in force for 117 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
Jun 28, 2013, 11:33 PM CDT (04:33 UTC)
Expired
Jun 29, 2013, 1:30 AM CDT
In force
117 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Covington County, AL

The radar

The Eglin Afb radar (KEVX), 93 km from the middle of the area, began a volume at 04:33 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

Birmingham, AL (KBMX), launched 00:00Z, 4.6 hours before the alert went out and 218 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, Birmingham, AL at 00:00Z on 2013-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2695 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, Birmingham, AL at 00:00Z on 2013-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 129 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
2695 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
680 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
129 m²/s²
0-3 km storm-relative helicity
147 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.3

Open this sounding in Storm Lab

The text

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

532 
WGUS54 KMOB 290433
FFWMOB
ALC039-290630-
/O.NEW.KMOB.FF.W.0023.130629T0433Z-130629T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1133 PM CDT FRI JUN 28 2013

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  COVINGTON COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 130 AM CDT

* AT 1127 PM 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. ADDITIONAL HEAVY RAIN IS EXPECTED 
  OVER AT LEAST THE NEXT HOUR AND THIS WILL LIKELY CAUSE FLASH 
  FLOODING IN THE WARNED AREA...ESPECIALLY AROUND THE ANDALUSIA 
  AREA.  

* LOCATIONS IMPACTED INCLUDE...
  ANDALUSIA...          SANFORD...            RIVER FALLS...
  OPP...                ONYCHA...             LOCKHART...
  LIBERTYVILLE...       HEATH...              GANTT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

IF YOU ARE IN DANGER FROM THE FLOOD WATERS AND NEED RESCUE ASSISTANCE
CALL 911. TO REPORT FLOODING TO THE NATIONAL WEATHER SERVICE CALL
(800) 284-9059.

&&

LAT...LON 3099 8619 3100 8645 3118 8669 3127 8670
      3134 8670 3136 8668 3139 8667 3141 8666
      3141 8620

$$
1 follow-up statement
873 
WGUS74 KMOB 290629
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
129 AM CDT SAT JUN 29 2013

ALC039-290638-
/O.EXP.KMOB.FF.W.0023.000000T0000Z-130629T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COVINGTON AL-
129 AM CDT SAT JUN 29 2013

...THE FLASH FLOOD WARNING FOR COVINGTON COUNTY WILL BE ALLOWED TO 
EXPIRE AT 130 AM CDT...

AT 129 AM CDT...THE HEAVY RAINFALL THAT PROMPTED THE WARNING FOR
COVINGTON COUNTY HAS ENDED...THUS THE FLASH FLOOD WARNING WILL BE
ALLOWED TO EXPIRE AT 130 AM CDT. HOWEVER...PONDING OF WATER MAY STILL
BE ENCOUNTERED.

LAT...LON 3099 8619 3100 8645 3118 8669 3127 8670
      3134 8670 3136 8668 3139 8667 3141 8666
      3141 8620

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 8:47 PM CDTSevere Thunderstorm WarningMOBChoctaw58 min
Jun 28, 9:11 PM CDTSevere Thunderstorm WarningMOBChoctaw49 min
Jun 28, 9:45 PM CDTSevere Thunderstorm WarningMOBMonroe, Wilcox45 min
Jun 28, 10:00 PM CDTSevere Thunderstorm WarningMOBWashington45 min
Jun 28, 10:34 PM CDTAreal Flood AdvisoryMOBButler, Conecuh, Monroe, Wilcox116 min
Jun 28, 11:09 PM CDTAreal Flood AdvisoryMOBCovington, Crenshaw2 hr
Jun 29, 1:37 AM CDTSpecial Marine WarningMOB53 min
Jun 29, 2:15 AM CDTSpecial Marine WarningMOB60 min
Jun 29, 3:57 AM CDTSpecial Marine WarningMOB93 min
Jun 29, 5:29 AM CDTSpecial Marine WarningMOB91 min
Jun 29, 5:58 AM CDTSpecial Marine WarningMOB92 min
Jun 29, 6:59 AM CDTSpecial Marine WarningMOB91 min
Jun 29, 9:02 AM CDTSpecial Marine WarningMOB118 min
Jun 29, 10:09 AM CDTSpecial Marine WarningMOB66 min

Nearby

Flash Flood Warnings in Alabama, 2013Every flash flood warning in 2013

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.