Alert archive / Alabama / Flash Flood Warnings in 2016

Flash Flood Warning 20, NWS Mobile, AL

April 1, 2016Baldwin County, Mobile County, Alabama

NWS Mobile, AL issued this flash flood warning at Apr 1, 2016, 5:41 PM CDT for Baldwin County, Mobile 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 1, 2016, 5:41 PM CDT (22:41 UTC)
Expired
Apr 1, 2016, 11:45 PM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Baldwin County, AL, Mobile County, AL

The radar

The Mobile radar (KMOB), 46 km from the middle of the area, began a volume at 22:43 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, 10.7 hours before the alert went out and 186 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 2016-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1826 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 2016-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
1826 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
467 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
1.9
Supercell composite
7.0

Open this sounding in Storm Lab

The text

As transmitted.

981 
WGUS54 KMOB 012241
FFWMOB
ALC003-097-020445-
/O.NEW.KMOB.FF.W.0020.160401T2241Z-160402T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
541 PM CDT FRI APR 1 2016

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BALDWIN COUNTY IN SOUTHWESTERN ALABAMA...
  MOBILE COUNTY IN SOUTHWESTERN ALABAMA...

* UNTIL 1145 PM CDT FRIDAY

* AT 539 PM CDT...DOPPLER RADAR INDICATED YET ANOTHER ROUND OF
  SHOWERS AND THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED
  AREA. FLASH FLOODING IS EXPECTED TO BEGIN WITHIN THE NEXT TWO
  HOURS OVER PORTIONS OF THE WARNED AREA.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MOBILE...PRICHARD...DAPHNE...FAIRHOPE...FOLEY...SARALAND...BAY MINETTE...
  SATSUMA...CHICKASAW...ORANGE BEACH...ROBERTSDALE...BAYOU LA BATRE...
  CREOLA...LOXLEY...GRAND BAY...POINT CLEAR...MIDTOWN MOBILE...DOWNTOWN
  MOBILE...TILLMANS CORNER AND THEODORE.

LAT...LON 3029 8774 3033 8780 3041 8782 3038 8784
      3048 8794 3071 8791 3078 8800 3035 8812
      3039 8840 3096 8842 3121 8762 3096 8759
      3087 8764 3068 8741 3042 8743 3031 8754
      3031 8751 3030 8752 3028 8775

$$
2 follow-up statements
862 
WGUS74 KMOB 020203
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
903 PM CDT FRI APR 1 2016

ALC003-097-020445-
/O.CON.KMOB.FF.W.0020.000000T0000Z-160402T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BALDWIN AL-MOBILE AL-
903 PM CDT FRI APR 1 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT FRIDAY
FOR BALDWIN AND MOBILE COUNTIES...

AT 856 PM CDT...DOPPLER RADAR INDICATED ANOTHER ROUND OF SHOWERS AND
THUNDERSTORMS DEVELOPING FROM EASTERN BALDWIN COUNTY SOUTHWEST TO
NEW ORLEANS. THESE ARE POISED TO MOVE ACROSS THE WARNED AREA THOUGH
11 PM CDT...AND COVERAGE WILL LIKELY FURTHER INCREASE. 

DURING THE EARLY EVENING...PORTIONS OF THE WARNED AREA RECEIVED AN
ESTIMATED 1 TO 2 INCHES OF RAIN IN UNDER A THREE HOUR PERIOD.
UPSTREAM RADAR ESTIMATES SHOW SIMILAR AMOUNTS IN ONE HOUR WITH
INDIVIDUAL STORMS.

THIS APPEARS TO PERHAPS BE THE LAST SUBSTANTIAL ROUND...AND FOR THIS
REASON THE FLASH FLOOD WARNING REMAINS IN EFFECT. URBAN FLOODING
COULD EASILY OCCUR WITH UP TO ONE AND ONE-HALF INCHES IN AN HOUR.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MOBILE...PRICHARD...DAPHNE...FAIRHOPE...FOLEY...SARALAND...BAY MINETTE...
SATSUMA...CHICKASAW...ORANGE BEACH...ROBERTSDALE...BAYOU LA BATRE...
CREOLA...LOXLEY...GRAND BAY...POINT CLEAR...MIDTOWN MOBILE...DOWNTOWN
MOBILE...TILLMANS CORNER AND THEODORE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3029 8774 3033 8780 3041 8782 3038 8784
      3048 8794 3071 8791 3078 8800 3035 8812
      3039 8840 3096 8842 3121 8762 3096 8759
      3087 8764 3068 8741 3042 8743 3031 8754
      3031 8751 3030 8752 3028 8775

$$
057 
WGUS74 KMOB 020347
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1047 PM CDT FRI APR 1 2016

ALC003-097-020357-
/O.CAN.KMOB.FF.W.0020.000000T0000Z-160402T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BALDWIN AL-MOBILE AL-
1047 PM CDT FRI APR 1 2016

...THE FLASH FLOOD WARNING FOR BALDWIN AND MOBILE COUNTIES IS
CANCELLED...

FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO
HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 3029 8774 3033 8780 3041 8782 3038 8784
      3048 8794 3071 8791 3078 8800 3035 8812
      3039 8840 3096 8842 3121 8762 3096 8759
      3087 8764 3068 8741 3042 8743 3031 8754
      3031 8751 3030 8752 3028 8775

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 31, 7:28 PM CDTSpecial Weather StatementMOBWilcox32 min
Mar 31, 8:43 PM CDTAreal Flood AdvisoryMOBChoctaw32 min
Mar 31, 8:55 PM CDTSpecial Weather StatementMOBChoctaw65 min
Mar 31, 9:20 PM CDTSevere Thunderstorm WarningMOBChoctaw25 min
Apr 1, 12:05 AM CDTSpecial Weather StatementMOBChoctaw40 min
Apr 1, 12:39 AM CDTSpecial Weather StatementMOBChoctaw51 min
Apr 1, 12:56 AM CDTSpecial Weather StatementMOBChoctaw49 min
Apr 1, 1:39 AM CDTSpecial Weather StatementMOBWilcox51 min
Apr 1, 2:19 AM CDTSpecial Weather StatementMOBWilcox41 min
Apr 1, 2:32 AM CDTSevere Thunderstorm WarningMOBMonroe, Wilcox28 min
Apr 1, 3:24 AM CDTSpecial Weather StatementMOBConecuh, Monroe51 min
Apr 1, 3:53 AM CDTSpecial Weather StatementMOBConecuh52 min
Apr 1, 4:09 AM CDTSpecial Weather StatementMOBButler, Crenshaw51 min
Apr 1, 4:28 AM CDTSmall Craft AdvisoryMOB54 hr
Apr 1, 4:52 AM CDTSpecial Weather StatementMOBCrenshaw53 min
Apr 1, 5:41 AM CDTSevere Thunderstorm WarningMOBCovington49 min
Apr 1, 7:20 AM CDTAreal Flood AdvisoryMOBBaldwin, Mobile115 min
Apr 1, 7:44 AM CDTSpecial Weather StatementMOBBaldwin46 min
Apr 1, 8:27 AM CDTSpecial Weather StatementMOBEscambia48 min
Apr 1, 8:44 AM CDTFlash Flood WarningMOBBaldwin, Mobile2 hr
Apr 1, 8:53 AM CDTSpecial Weather StatementMOBConecuh, Monroe67 min
Apr 1, 9:13 AM CDTSpecial Weather StatementMOBEscambia47 min
Apr 1, 9:24 AM CDTSpecial Weather StatementMOBCovington36 min
Apr 1, 9:36 AM CDTAreal Flood AdvisoryMOBEscambia114 min
Apr 1, 9:47 AM CDTSpecial Weather StatementMOBButler43 min
Apr 1, 10:05 AM CDTSpecial Marine WarningMOB55 min
Apr 1, 10:06 AM CDTRiver Flood WarningMOBDallas, Monroe, Wilcox3 days
Apr 1, 10:06 AM CDTRiver Flood WarningMOBClarke, Monroe, Wilcox5 days
Apr 1, 10:31 AM CDTAreal Flood AdvisoryMOBBaldwin, Mobile119 min
Apr 1, 10:43 AM CDTAreal Flood AdvisoryMOBConecuh, Covington3 hr
Apr 1, 11:33 AM CDTFlash Flood WarningMOBConecuh, Covington, Escambia3 hr
Apr 1, 12:50 PM CDTAreal Flood AdvisoryMOBBaldwin115 min
Apr 1, 12:56 PM CDTSpecial Marine WarningMOB64 min
Apr 1, 1:51 PM CDTSpecial Marine WarningMOB54 min
Apr 1, 1:54 PM CDTRiver Flood WarningMOBCovington3 days
Apr 1, 1:59 PM CDTRiver Flood WarningMOBCovington, Escambia55 hr
Apr 1, 2:09 PM CDTSpecial Marine WarningMOB51 min
Apr 1, 3:05 PM CDTSpecial Marine WarningMOB85 min
Apr 1, 4:05 PM CDTSpecial Marine WarningMOB25 min
Apr 1, 4:23 PM CDTAreal Flood AdvisoryMOBBaldwin, Covington, Escambia6 hr
Apr 1, 4:31 PM CDTSpecial Marine WarningMOB89 min
Apr 1, 6:10 PM CDTSpecial Marine WarningMOB95 min
Apr 1, 6:22 PM CDTAreal Flood AdvisoryMOBBaldwin, Clarke, Mobile, Monroe, Washington6 hr
Apr 1, 6:33 PM CDTSpecial Weather StatementMOBBaldwin, Mobile42 min
Apr 1, 6:50 PM CDTAreal Flood AdvisoryMOBConecuh, Covington, Escambia3 hr
Apr 1, 6:59 PM CDTSpecial Marine WarningMOB61 min

Nearby

Flash Flood Warnings in Alabama, 2016Every flash flood warning in 2016

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.