Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 4, NWS Mobile, AL

February 18, 2012Mobile County, Washington County, Alabama; George County, Greene County, Perry County, Mississippi

NWS Mobile, AL issued this flash flood warning at Feb 18, 2012, 4:30 PM CST for Mobile County, Washington County, Alabama; George County, Greene County, Perry County, Mississippi. It was in force for 60 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
Feb 18, 2012, 4:30 PM CST (22:30 UTC)
Expired
Feb 18, 2012, 5:30 PM CST
In force
60 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Mobile County, AL, Washington County, AL, George County, MS, Greene County, MS, Perry County, MS

The radar

The Mobile radar (KMOB), 51 km from the middle of the area, began a volume at 22:33 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.5 hours before the alert went out and 118 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 2012-02-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2012-02-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 160 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
449 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
160 m²/s²
0-3 km storm-relative helicity
177 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.

615 
WGUS54 KMOB 182230
FFWMOB
ALC097-129-MSC039-041-111-182330-
/O.NEW.KMOB.FF.W.0004.120218T2230Z-120218T2330Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
430 PM CST SAT FEB 18 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GEORGE COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITY OF LUCEDALE...
  SOUTHEASTERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHEASTERN PERRY COUNTY IN SOUTHEAST MISSISSIPPI...
  NORTHWESTERN MOBILE COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITY OF CITRONELLE...
  SOUTHWESTERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 530 PM CST

* AT 428 PM CST...NATIONAL WEATHER SERVICE RADAR INDICATED ARE AREA 
  OF HEAVY RAIN FROM OVER GEORGE AND NORTHWESTERN MOBILE 
  COUNTIES...MOVING EAST AT 35 MPH.

ADDITIONAL RAINFALL AMOUNTS OF UP TO AN INCH ARE POSSIBLE IN THE 
WARNED AREA.

TO REPORT FLASH FLOODING TO YOUR NATIONAL WEATHER SERVICE...CALL TOLL
FREE AT 1 8 7 7 6 3 3 6 7 7 2.

LAT...LON 3099 8882 3124 8821 3079 8818 3073 8862
      3073 8888 3080 8889 3080 8888 3091 8888
      3091 8892

$$
1 follow-up statement
818 
WGUS74 KMOB 182324
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
524 PM CST SAT FEB 18 2012

ALC097-129-MSC039-041-111-182333-
/O.EXP.KMOB.FF.W.0004.000000T0000Z-120218T2330Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON AL-PERRY MS-GREENE MS-GEORGE MS-MOBILE AL-
524 PM CST SAT FEB 18 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 530 PM CST FOR NORTHWESTERN
MOBILE...GEORGE...SOUTHEASTERN GREENE...SOUTHEASTERN PERRY AND
SOUTHWESTERN WASHINGTON COUNTIES...

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CST SUNDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA.

EVEN THOUGH THE HEAVY RAIN HAS MOVED EAST OF THE WARNED 
AREA...PONDING OF WATER ON ROADWAYS AND LOW LYING AREAS IS STILL 
LIKELY. PLEASE DRIVE WITH CAUTION. ALSO...REMAIN ALERT TO RISES ON 
LOCAL STREAMS AND CREEKS.

LAT...LON 3099 8882 3124 8821 3079 8818 3073 8862
      3073 8888 3080 8889 3080 8888 3091 8888
      3091 8892

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 18, 3:38 AM CSTWind AdvisoryMOB38 hr
Feb 18, 1:56 PM CSTSevere Thunderstorm WarningMOBBaldwin, Mobile49 min
Feb 18, 2:28 PM CSTFlash Flood WarningMOBMobile, Washington32 days
Feb 18, 3:13 PM CSTSevere Thunderstorm WarningMOBBaldwin, Conecuh, Escambia, Monroe47 min
Feb 18, 3:28 PM CSTGale WarningMOB21 hr
Feb 18, 3:37 PM CSTFlash Flood WarningMOBBaldwin, Clarke, Conecuh, Escambia, Mobile, Monroe and 1 more113 min
Feb 18, 3:59 PM CSTSevere Thunderstorm WarningMOBBaldwin, Mobile61 min
Feb 18, 4:01 PM CSTSevere Thunderstorm WarningMOBConecuh, Covington, Escambia44 min
Feb 18, 4:07 PM CSTSpecial Marine WarningMOB83 min
Feb 18, 4:19 PM CSTFlash Flood WarningMOBBaldwin, Mobile116 min
Feb 18, 4:21 PM CSTTornado WarningMOBMobile24 min
Feb 18, 4:25 PM CSTAreal Flood AdvisoryMOBChoctaw, Clarke, Monroe, Washington, Wilcox2 hr
Feb 18, 4:38 PM CSTSevere Thunderstorm WarningMOBConecuh, Covington, Crenshaw, Escambia52 min
Feb 18, 4:52 PM CSTFlash Flood WarningMOBBaldwin113 min
Feb 18, 4:59 PM CSTSevere Thunderstorm WarningMOBBaldwin76 min
Feb 18, 5:13 PM CSTFlash Flood WarningMOBBaldwin, Butler, Conecuh, Covington, Crenshaw, Escambia2 hr
Feb 18, 5:17 PM CSTTornado WarningMOBBaldwin28 min
Feb 18, 5:27 PM CSTSpecial Marine WarningMOB93 min
Feb 18, 9:48 AM CSTRiver Flood WarningMOBGeorge, Greene, Perry6 days
Feb 18, 9:48 AM CSTRiver Flood WarningMOBGeorge, Greene, Wayne6 days
Feb 18, 12:39 PM CSTSevere Thunderstorm WarningMOBPerry, Stone51 min
Feb 18, 1:13 PM CSTSevere Thunderstorm WarningMOBGeorge, Stone47 min
Feb 18, 1:17 PM CSTTornado WarningMOBGeorge, Stone13 min
Feb 18, 1:35 PM CSTAreal Flood AdvisoryMOBPerry, Stone115 min
Feb 18, 1:36 PM CSTTornado WarningMOBGeorge, Greene39 min
Feb 18, 4:05 PM CSTAreal Flood WarningMOBGeorge, Greene, Perry, Stone, Wayne34 days

Nearby

Flash Flood Warnings in Mississippi, 2012Flash Flood Warnings in Alabama, 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.