Alert archive / Alabama / Flash Flood Warnings in 2016

Flash Flood Warning 39, NWS Mobile, AL

September 26, 2016Baldwin County, Mobile County, Alabama

NWS Mobile, AL issued this flash flood warning at Sep 26, 2016, 4:35 PM CDT for Baldwin County, Mobile County, Alabama. It was in force for 115 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
Sep 26, 2016, 4:35 PM CDT (21:35 UTC)
Expired
Sep 26, 2016, 6:30 PM CDT
In force
115 min
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), 2 km from the middle of the area, began a volume at 21:38 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, 9.6 hours before the alert went out and 150 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 2016-09-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 757 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 12:00Z on 2016-09-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 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
757 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
1081 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
1 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

274 
WGUS54 KMOB 262135
FFWMOB
ALC003-097-262330-
/O.NEW.KMOB.FF.W.0039.160926T2135Z-160926T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
435 PM CDT MON SEP 26 2016

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 630 PM CDT

* AT 433 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MIDTOWN MOBILE...DOWNTOWN MOBILE...PRICHARD...TILLMANS CORNER...
  SARALAND...CHICKASAW...SATSUMA...SEMMES...
  MOBILE REGIONAL AIRPORT...I65 AND AL 158...
  I65 AND I165 AND I10 AND I65.

ADDITIONAL RAINFALL AMOUNTS AROUND 2 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

&&

LAT...LON 3056 8839 3086 8832 3090 8795 3056 8805

$$
1 follow-up statement
764 
WGUS74 KMOB 262231
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
531 PM CDT MON SEP 26 2016

ALC003-262238-
/O.CAN.KMOB.FF.W.0039.000000T0000Z-160926T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BALDWIN AL-
531 PM CDT MON SEP 26 2016

...THE FLASH FLOOD WARNING FOR WEST CENTRAL BALDWIN COUNTY IS
CANCELLED...

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

LAT...LON 3056 8839 3086 8832 3090 8798 3079 8800
      3077 8802 3076 8802 3077 8800 3062 8803
      3056 8805

$$

ALC097-262330-
/O.CON.KMOB.FF.W.0039.000000T0000Z-160926T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOBILE AL-
531 PM CDT MON SEP 26 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
CENTRAL MOBILE COUNTY...

AT 528 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
PERIODS OF MODERATE RAIN ACROSS THE WARNED AREA WHERE UP TO THREE
INCHES OF RAIN HAVE ALREADY FALLEN.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
DOWNTOWN MOBILE...MIDTOWN MOBILE...PRICHARD...TILLMANS CORNER...
SARALAND...CHICKASAW...SATSUMA...CREOLA...SEMMES...
MOBILE REGIONAL AIRPORT...I65 AND AL 158...
I65 AND I165 AND I10 AND I65.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THE HEAVY RAINFALL WILL CAUSE FLOODING OF
SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE.

&&

LAT...LON 3056 8839 3086 8832 3090 8798 3079 8800
      3077 8802 3076 8802 3077 8800 3062 8803
      3056 8805

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 26, 1:13 PM CDTAreal Flood AdvisoryMOBBaldwin3 hr
Sep 26, 2:26 PM CDTAreal Flood AdvisoryMOBBaldwin3 hr
Sep 26, 4:20 PM CDTSpecial Weather StatementMOBMobile40 min
Sep 26, 4:42 PM CDTSpecial Marine WarningMOB63 min
Sep 26, 5:07 PM CDTSpecial Weather StatementMOBMobile68 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.