Alert archive / Alabama / Flash Flood Warnings in 2009

Flash Flood Warning 25, NWS Mobile, AL

May 4, 20095 counties in Alabama; Escambia County, Florida

NWS Mobile, AL issued this flash flood warning at May 4, 2009, 9:20 AM CDT for 5 counties in Alabama; Escambia County, Florida. It was in force for 3 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: May 4, 2009, 9:20 AM CDT (14:20 UTC)
Expired: May 4, 2009, 12:47 PM CDT
In force: 3 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Baldwin County, AL, Conecuh County, AL, Covington County, AL, Escambia County, AL, Monroe County, AL, Escambia County, FL

The radar

The Mobile radar (KMOB), 90 km from the middle of the area, began a volume at 14:24 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

Birmingham, AL (KBMX), launched 12:00Z, 2.3 hours before the alert went out and 235 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 132 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 546 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 206 m²/s²
0-3 km storm-relative helicity: 310 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KMOB 041420
FFWMOB
ALC003-035-039-053-099-FLC033-041500-
/O.NEW.KMOB.FF.W.0025.090504T1420Z-090504T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
920 AM CDT MON MAY 4 2009

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN ESCAMBIA COUNTY IN NORTHWEST FLORIDA...
  CONECUH COUNTY IN SOUTH CENTRAL ALABAMA...
  THIS INCLUDES THE CITY OF EVERGREEN...
  NORTHWESTERN COVINGTON COUNTY IN SOUTH CENTRAL ALABAMA...
  ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA...
  THIS INCLUDES THE CITY OF BREWTON...
  SOUTHWESTERN MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHWESTERN BALDWIN COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITY OF BAY MINETTE...

* UNTIL 1000 AM CDT

* AT 920 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A MULTIPLE THUNDERSTORMS AS THEY MOVE EAST
  OVER PORTIONS OF SOUTHWEST AND SOUTH CENTRAL ALABAMA AND EXTREME
  NORTHWEST FLORIDA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WILCOX...  
  URIAH...PAUL...MINEOLA...JOHNSONVILLE...GOODWAY...BROOKS...
  BELLEVILLE

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

LAT...LON 3126 8659 3108 8699 3070 8800 3081 8800
      3084 8795 3090 8799 3095 8793 3098 8797
      3120 8794 3122 8787 3121 8785 3123 8786
      3139 8733 3157 8687 3153 8685 3153 8664

$$

PURDY

2 follow-up statements

000 
WGUS54 KMOB 041429
FFWMOB
ALC003-035-039-053-099-FLC033-041800-
/O.EXT.KMOB.FF.W.0025.000000T0000Z-090504T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
929 AM CDT MON MAY 4 2009

THE NATIONAL WEATHER SERVICE IN MOBILE HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN ESCAMBIA COUNTY IN NORTHWEST FLORIDA...
  CONECUH COUNTY IN SOUTH CENTRAL ALABAMA...
  THIS INCLUDES THE CITY OF EVERGREEN...
  NORTHWESTERN COVINGTON COUNTY IN SOUTH CENTRAL ALABAMA...
  ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA...
  THIS INCLUDES THE CITY OF BREWTON...
  SOUTHWESTERN MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHWESTERN BALDWIN COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITY OF BAY MINETTE...

* UNTIL 100 PM CDT

* AT 928 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A MULTIPLE THUNDERSTORMS AS THEY MOVE EAST
  OVER PORTIONS OF SOUTHWEST AND SOUTH CENTRAL ALABAMA AND EXTREME
  NORTHWEST FLORIDA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WILCOX...  
  URIAH...PAUL...MINEOLA...JOHNSONVILLE...GOODWAY...BROOKS...
  BELLEVILLE

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

LAT...LON 3126 8659 3108 8699 3070 8800 3081 8800
      3084 8795 3090 8799 3095 8793 3098 8797
      3120 8794 3122 8787 3121 8785 3123 8786
      3139 8733 3157 8687 3153 8685 3153 8664

$$

PURDY

000 
WGUS74 KMOB 041747
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1247 PM CDT MON MAY 4 2009

ALC003-035-039-053-099-FLC033-041757-
/O.CAN.KMOB.FF.W.0025.000000T0000Z-090504T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ESCAMBIA AL-COVINGTON AL-CONECUH AL-MONROE AL-BALDWIN AL-ESCAMBIA FL-
1247 PM CDT MON MAY 4 2009

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHWESTERN
ESCAMBIA...NORTHWESTERN BALDWIN...SOUTHWESTERN MONROE...CONECUH...
NORTHWESTERN COVINGTON AND ESCAMBIA COUNTIES...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 PM CDT MONDAY AFTERNOON
FOR SOUTHWEST ALABAMA AND NORTHWEST FLORIDA.

LAT...LON 3126 8659 3108 8699 3070 8800 3081 8800
      3084 8795 3090 8799 3095 8793 3098 8797
      3120 8794 3122 8787 3121 8785 3123 8786
      3139 8733 3157 8687 3153 8685 3153 8664

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 3:00 AM CDT	Severe Thunderstorm Warning	MOB	Mobile, Washington	45 min
May 4, 3:40 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Mobile, Monroe, Washington	65 min
May 4, 4:09 AM CDT	Severe Thunderstorm Warning	MOB	Washington	51 min
May 4, 4:13 AM CDT	Small Craft Advisory	MOB		10 hr
May 4, 4:29 AM CDT	Severe Thunderstorm Warning	MOB	Mobile, Washington	61 min
May 4, 4:50 AM CDT	Severe Thunderstorm Warning	MOB	Monroe	55 min
May 4, 5:02 AM CDT	Tornado Warning	MOB	Monroe	28 min
May 4, 5:04 AM CDT	Flash Flood Watch	MOB	Butler, Choctaw, Clarke, Conecuh, Escambia, Monroe and 2 more	7 hr
May 4, 5:19 AM CDT	Flash Flood Warning	MOB	Washington	41 min
May 4, 6:07 AM CDT	Severe Thunderstorm Warning	MOB	Conecuh	53 min
May 4, 6:11 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Escambia, Monroe	16 min
May 4, 6:34 AM CDT	Severe Thunderstorm Warning	MOB	Mobile	41 min
May 4, 6:55 AM CDT	Flash Flood Warning	MOB	Clarke, Mobile, Washington	3 hr
May 4, 7:30 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Wilcox	60 min
May 4, 8:56 AM CDT	Flash Flood Warning	MOB	Mobile	4 hr
May 4, 9:10 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Escambia	44 min
May 4, 9:13 AM CDT	Severe Thunderstorm Warning	MOB	Crenshaw	32 min
May 4, 10:37 AM CDT	Flash Flood Warning	MOB	Mobile	3 hr
May 4, 11:19 AM CDT	Special Marine Warning	MOB		41 min
May 4, 11:21 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin	39 min
May 4, 11:36 AM CDT	Flash Flood Warning	MOB	Baldwin, Conecuh, Covington, Escambia	3 hr
May 4, 12:36 PM CDT	Special Marine Warning	MOB		39 min
May 4, 1:26 PM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
May 4, 2:36 PM CDT	Special Marine Warning	MOB		84 min
May 4, 3:52 PM CDT	Special Marine Warning	MOB		38 min
May 4, 4:25 PM CDT	Special Marine Warning	MOB		65 min
May 4, 5:27 PM CDT	Special Marine Warning	MOB		48 min
May 4, 6:14 PM CDT	Special Marine Warning	MOB		91 min
May 4, 9:33 AM CDT	Severe Thunderstorm Warning	MOB	Escambia, Santa Rosa	42 min
May 4, 10:12 AM CDT	Severe Thunderstorm Warning	MOB	Okaloosa, Santa Rosa	48 min

Nearby

Flash Flood Warnings in Alabama, 2009 Flash Flood Warnings in Florida, 2009 Every flash flood warning in 2009

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.