Alert archive / Alabama / Flash Flood Warnings in 2013

Flash Flood Warning 18, NWS Mobile, AL

May 2, 2013Baldwin County, Alabama

NWS Mobile, AL issued this flash flood warning at May 2, 2013, 5:46 AM CDT for Baldwin County, Alabama. It was in force for 6 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
May 2, 2013, 5:46 AM CDT (10:46 UTC)
Expired
May 2, 2013, 11:45 AM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Baldwin County, AL

The radar

The Mobile radar (KMOB), 51 km from the middle of the area, began a volume at 10:46 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
May 2, 6:13 AM CDTFLASH FLOODFoley, ALSEVERAL ROADS FLOODED IN SOUTHERN BALDWIN COUNTY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 10.8 hours before the alert went out and 179 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 2013-05-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 183 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 2013-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
183 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
622 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
78 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.

004 
WGUS54 KMOB 021046
FFWMOB
ALC003-021645-
/O.NEW.KMOB.FF.W.0018.130502T1046Z-130502T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
546 AM CDT THU MAY 2 2013

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN BALDWIN COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 1145 AM CDT

* AT 543 AM CDT...VERY HEAVY RAINFALL WAS INDICATED OVER THE WARNED
  AREA AND RADAR ESTIMATES SHOW 2 TO 5 INCHES OF RAINFALL HAS
  OCCURRED OVER THE PAST THREE HOURS.  WATER HAS BEEN REPORTED OVER
  ROADS AT HIGHWAY 98 SOUTH OF FAIRHOPE...THE INTERSECTION OF
  HIGHWAY 98 AND SCENIC HIGHWAY 98...THE INTERSECTION OF COUNTY ROAD
  24 AND HIGHWAY 98...THE INTERSECTION OF COUNTY ROAD 64 AND COUNTY
  ROAD 71...AND THE INTERSECTION OF COUNTY ROAD 181 AND COUNTY ROAD
  48.  THE HEAVY RAINFALL WILL LIKELY CAUSE FLASH FLOODING TO OCCUR
  OR CONTINUE IN THE WARNED AREA.

* LOCATIONS IMPACTED INCLUDE...
  SUMMERDALE...         SILVERHILL...         ROBERTSDALE...
  POINT CLEAR...        MAGNOLIA SPRINGS...   FOLEY...
  FAIRHOPE...           ELBERTA...            BON SECOUR...

LAT...LON 3022 8797 3025 8796 3027 8794 3024 8787
      3028 8777 3030 8777 3037 8785 3041 8792
      3047 8793 3048 8795 3054 8791 3058 8792
      3068 8743 3034 8750 3022 8785

$$
1 follow-up statement
092 
WGUS74 KMOB 021528
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1028 AM CDT THU MAY 2 2013

ALC003-021537-
/O.CAN.KMOB.FF.W.0018.000000T0000Z-130502T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BALDWIN AL-
1028 AM CDT THU MAY 2 2013

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHERN BALDWIN
COUNTY...

AT 1024 AM CDT...THE HEAVY RAINFALL THAT PROMPTED THE WARNING FOR
SOUTHERN BALDWIN COUNTY HAS ENDED...THUS THE FLASH FLOOD WARNING HAS
BEEN CANCELLED. HOWEVER...PONDING OF WATER MAY STILL BE ENCOUNTERED.

A FLASH FLOOD WATCH REMAINS IN EFFECT FOR ADDITIONAL HEAVY RAINFALL 
LATER THIS AFTERNOON AND POSSIBLY INTO THE EVENING.

LAT...LON 3022 8797 3025 8796 3027 8794 3024 8787
      3028 8777 3030 8777 3037 8785 3041 8792
      3047 8793 3048 8795 3054 8791 3058 8792
      3068 8743 3034 8750 3022 8785

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 1, 8:13 PM CDTFlash Flood WarningMOBMobile4 hr
May 1, 9:32 PM CDTSpecial Marine WarningMOB88 min
May 1, 10:08 PM CDTAreal Flood AdvisoryMOBBaldwin, Mobile112 min
May 1, 10:43 PM CDTFlash Flood WarningMOBMobile4 hr
May 1, 11:03 PM CDTSpecial Marine WarningMOB87 min
May 2, 12:32 AM CDTSpecial Marine WarningMOB88 min
May 2, 12:45 AM CDTAreal Flood AdvisoryMOBBaldwin2 hr
May 2, 2:28 AM CDTAreal Flood WarningMOBMobile12 hr
May 2, 2:57 AM CDTFlash Flood WarningMOBBaldwin3 hr
May 2, 3:08 AM CDTAreal Flood WarningMOBMobile12 hr
May 2, 5:02 AM CDTSpecial Marine WarningMOB88 min
May 2, 5:04 AM CDTCoastal Flood StatementMOB8 hr
May 2, 9:02 AM CDTRiver Flood WarningMOBBaldwin26 hr
May 2, 10:50 AM CDTRiver Flood WarningMOBChoctaw, Clarke, Washington36 hr
May 2, 12:29 PM CDTRiver Flood WarningMOBMobile26 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.