Alert archive / Alabama / Flash Flood Warnings in 2015

Flash Flood Warning 18, NWS Mobile, AL

September 27, 2015Mobile County, Alabama

NWS Mobile, AL issued this flash flood warning at Sep 27, 2015, 5:14 PM CDT for Mobile County, Alabama. It was in force for 3 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
Sep 27, 2015, 5:14 PM CDT (22:14 UTC)
Expired
Sep 27, 2015, 8:15 PM CDT
In force
3 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Mobile County, AL

The radar

The Mobile radar (KMOB), 29 km from the middle of the area, began a volume at 22:15 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
Sep 27, 6:24 PM CDTFLASH FLOOD5 Wsw Downtown Mobile, ALOFF DUTY NWS EMPLOYEE REPORTS APROX 10-12 INCHES OF WATER OVER AIRPORT BLVD., JUST WEST OF I-65, APROX 5 MILES W. OF DOWNTOWN MOBILE.

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 12:00Z, 10.2 hours before the alert went out and 149 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 2015-09-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 69 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 2015-09-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
69 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
985 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
99 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.

475 
WGUS54 KMOB 272214
FFWMOB
ALC097-280115-
/O.NEW.KMOB.FF.W.0018.150927T2214Z-150928T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
514 PM CDT SUN SEP 27 2015

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 815 PM CDT

* AT 512 PM CDT...VERY HEAVY RAINFALL WAS INDICATED OVER THE WARNED
  AREA AND RADAR ESTIMATES SHOW 2 TO 3 INCHES OF RAINFALL HAS 
  OCCURRED OVER PORTIONS OF THE WARNED AREA DURING THE THE PAST 
  HOUR. IN ADDITION...SOME AREAS HAVE ALREADY RECEIVED MORE THAN 5 
  INCHES OF RAINFALL THIS AFTERNOON.  
  
  THIS WILL LIKELY CAUSE FLASH FLOODING IN THE WARNED AREA.

* LOCATIONS IMPACTED INCLUDE...
  MOBILE...              PRICHARD...            SARALAND...
  CHICKASAW...           BAYOU LA BATRE...      GRAND BAY...
  TILLMANS CORNER...     THEODORE...            MIDTOWN MOBILE...
  REGIONAL AIRPORT IN WEST MOBILE...            CODEN...
  I65 AND I165...        

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS FLOODING IS IMMINENT OR OCCURRING. SEEK
HIGHER GROUND IMMEDIATELY. DO NOT DRIVE OR WALK INTO AREAS WHERE
WATER CROSSES A ROAD. TURN AROUND - DON'T DROWN!

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 3024 8828 3025 8818 3036 8820 3032 8826
      3039 8840 3086 8841 3082 8795 3067 8803
      3068 8803 3075 8804 3074 8805 3033 8814
      3026 8809 3026 8810 3032 8819 3026 8818
      3025 8808 3024 8808 3023 8831

$$
1 follow-up statement
006 
WGUS74 KMOB 272343
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
643 PM CDT SUN SEP 27 2015

ALC097-280115-
/O.CON.KMOB.FF.W.0018.000000T0000Z-150928T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOBILE AL-
643 PM CDT SUN SEP 27 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
SOUTHERN MOBILE COUNTY...

...SIGNIFICANT FLASH FLOODING REPORTED IN THE MOBILE METRO 
VICINITY...

MULTIPLE REPORTS OF FLASH FLOODING HAVE BEEN RECEIVED IN THE CITY OF 
MOBILE DURING THE PAST HOUR INCLUDING AIRPORT BLVD NEAR I-65... 
WHERE CARS HAVE BEEN STALLED...NEAR SCHILLINGER AND AIRPORT BLVD... 
COTTAGE HILL AND DAWES RD...AND ON HWY 90 AND BELLINGRATH RD. 

AT 640 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE 
MONITORING SHOWERS AND THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL 
OVER MUCH OF SOUTHERN MOBILE COUNTY...INCLUDING IN AND AROUND THE 
CITY OF MOBILE. RADAR ESTIMATES AND SPOTTER REPORTS HAVE CONFIRMED 
THAT 4 TO 8 INCHES OF RAIN HAS FALLEN IN THE WARNED AREA.

LOCATIONS IMPACTED INCLUDE...
MOBILE...              PRICHARD...            SARALAND...
CHICKASAW...           BAYOU LA BATRE...      GRAND BAY...
TILLMANS CORNER...     THEODORE...            MIDTOWN MOBILE...
REGIONAL AIRPORT IN WEST MOBILE...            CODEN...
I65 AND I165...        

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. NEVER ATTEMPT TO CROSS A FLOODED ROADWAY! 

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 3024 8828 3025 8818 3036 8820 3032 8826
      3039 8840 3086 8841 3082 8795 3067 8803
      3068 8803 3075 8804 3074 8805 3033 8814
      3026 8809 3026 8810 3032 8819 3026 8818
      3025 8808 3024 8808 3023 8831

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 27, 3:41 AM CDTSmall Craft AdvisoryMOB33 hr
Sep 27, 5:44 AM CDTRip Current StatementMOBBaldwin, Mobile49 hr
Sep 27, 2:52 PM CDTAreal Flood AdvisoryMOBMobile3 hr
Sep 27, 3:37 PM CDTSpecial Weather StatementMOBMobile38 min
Sep 27, 4:37 PM CDTSevere Thunderstorm WarningMOBMobile53 min
Sep 27, 4:56 PM CDTSpecial Weather StatementMOBMobile49 min
Sep 27, 5:01 PM CDTSpecial Marine WarningMOB89 min
Sep 27, 5:31 PM CDTSpecial Marine WarningMOB89 min
Sep 27, 5:33 PM CDTSevere Thunderstorm WarningMOBBaldwin57 min
Sep 27, 5:55 PM CDTSevere Thunderstorm WarningMOBMobile65 min
Sep 27, 6:39 PM CDTSevere Thunderstorm WarningMOBMobile49 min

Nearby

Flash Flood Warnings in Alabama, 2015Every flash flood warning in 2015

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.