Alert archive / Florida / Flash Flood Warnings in 2012

Flash Flood Warning 5, NWS Mobile, AL

February 18, 2012Escambia County, Florida; Baldwin County, Alabama

NWS Mobile, AL issued this flash flood warning at Feb 18, 2012, 4:52 PM CST for Escambia County, Florida; Baldwin County, Alabama. It was in force for 113 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, 4:52 PM CST (22:52 UTC)
Expired: Feb 18, 2012, 6:45 PM CST
In force: 113 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Baldwin County, AL, Escambia County, FL

The radar

The Mobile radar (KMOB), 51 km from the middle of the area, began a volume at 22:51 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, 10.9 hours before the alert went out and 184 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: 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.

789 
WGUS54 KMOB 182252
FFWMOB
ALC003-FLC033-190045-
/O.NEW.KMOB.FF.W.0005.120218T2252Z-120219T0045Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL ESCAMBIA COUNTY IN NORTHWEST FLORIDA...
  SOUTHERN BALDWIN COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITIES OF...ROBERTSDALE...POINT CLEAR...LOXLEY...
  FOLEY...FAIRHOPE...

* UNTIL 645 PM CST

* AT 447 PM CST...NATIONAL WEATHER SERVICE RADAR INDICATED VERY HEAVY
  RAIN FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM LOXLEY TO 8   
MILES SOUTHWEST OF POINT CLEAR...MOVING EAST-SOUTH AT 30 MPH.

* THUNDERSTORMS PRODUCING VERY HEAVY RAIN WILL BE NEAR...
  SILVERHILL AND ROBERTSDALE BY 500 PM CST...
  SUMMERDALE AND MOUTH OF WEEKS BAY BY 520 PM CST...
  MAGNOLIA SPRINGS BY 530 PM CST...
  BON SECOUR BY 540 PM CST...
  FOLEY BY 545 PM CST...
  ELBERTA BY 555 PM CST...

ADDITIONAL RAINFALL AMOUNTS OF 1.5 TO 2.5 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 3025 8780 3028 8777 3030 8777 3034 8783
      3037 8785 3041 8792 3047 8793 3049 8795
      3054 8791 3057 8791 3072 8769 3065 8726
      3024 8775

$$

1 follow-up statement

462 
WGUS74 KMOB 190036
FFSMOB

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

ALC003-FLC033-190046-
/O.EXP.KMOB.FF.W.0005.000000T0000Z-120219T0045Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ESCAMBIA FL-BALDWIN AL-
636 PM CST SAT FEB 18 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 645 PM CST FOR SOUTHERN
BALDWIN AND CENTRAL ESCAMBIA 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 3025 8780 3028 8777 3030 8777 3034 8783
      3037 8785 3041 8792 3047 8793 3049 8795
      3054 8791 3057 8791 3072 8769 3065 8726
      3024 8775

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 18, 3:38 AM CST	Wind Advisory	MOB		38 hr
Feb 18, 3:13 PM CST	Severe Thunderstorm Warning	MOB	Escambia, Santa Rosa	47 min
Feb 18, 3:37 PM CST	Flash Flood Warning	MOB	Escambia	113 min
Feb 18, 4:01 PM CST	Severe Thunderstorm Warning	MOB	Escambia, Okaloosa, Santa Rosa	44 min
Feb 18, 4:38 PM CST	Severe Thunderstorm Warning	MOB	Okaloosa, Santa Rosa	52 min
Feb 18, 4:59 PM CST	Severe Thunderstorm Warning	MOB	Escambia, Santa Rosa	76 min
Feb 18, 5:13 PM CST	Flash Flood Warning	MOB	Escambia, Okaloosa, Santa Rosa	2 hr
Feb 18, 5:17 PM CST	Tornado Warning	MOB	Escambia	28 min
Feb 18, 1:56 PM CST	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	49 min
Feb 18, 2:28 PM CST	Flash Flood Warning	MOB	Mobile, Washington	32 days
Feb 18, 3:28 PM CST	Gale Warning	MOB		21 hr
Feb 18, 3:59 PM CST	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	61 min
Feb 18, 4:07 PM CST	Special Marine Warning	MOB		83 min
Feb 18, 4:19 PM CST	Flash Flood Warning	MOB	Baldwin, Mobile	116 min
Feb 18, 4:21 PM CST	Tornado Warning	MOB	Mobile	24 min
Feb 18, 4:25 PM CST	Areal Flood Advisory	MOB	Choctaw, Clarke, Monroe, Washington, Wilcox	2 hr
Feb 18, 4:30 PM CST	Flash Flood Warning	MOB	Mobile, Washington	60 min
Feb 18, 5:27 PM CST	Special Marine Warning	MOB		93 min

Nearby

Flash Flood Warnings in Florida, 2012 Flash Flood Warnings in Alabama, 2012 Every 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.