Alert archive / Alabama / Flash Flood Warnings in 2012

Flash Flood Warning 3, NWS Mobile, AL

February 18, 2012Baldwin County, Mobile County, Alabama

NWS Mobile, AL issued this flash flood warning at Feb 18, 2012, 4:19 PM CST for Baldwin County, Mobile County, Alabama. It was in force for 116 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, 4:19 PM CST (22:19 UTC)
Expired: Feb 18, 2012, 6:15 PM CST
In force: 116 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), 22 km from the middle of the area, began a volume at 22:19 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, 10.3 hours before the alert went out and 146 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.

074 
WGUS54 KMOB 182219
FFWMOB
ALC003-097-190015-
/O.NEW.KMOB.FF.W.0003.120218T2219Z-120219T0015Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME WEST CENTRAL BALDWIN COUNTY IN SOUTHWEST ALABAMA...
  SOUTHERN MOBILE COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITIES OF...TILLMANS CORNER...THEODORE...
  PRICHARD...GRAND BAY...MOBILE...CHICKASAW...BAYOU LA BATRE...

* UNTIL 615 PM CST

* AT 414 PM CST...NATIONAL WEATHER SERVICE RADAR INDICATED VERY HEAVY
  RAIN FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM FOREST HILL TO
  GRAND BAY...OR ALONG A LINE EXTENDING FROM MOBILE TO GRAND BAY...
  MOVING EAST AT 35 MPH.

* THUNDERSTORMS PRODUCING VERY HEAVY RAIN WILL CONTINUE THROUGH 5 PM 
  FOR...  
  FOREST HILL...PRICHARD...TILLMANS CORNER...MOBILE...THEODORE AND 
  BAYOU LA BATRE

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES 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 3037 8826 3038 8829 3036 8832 3039 8833
      3036 8838 3048 8841 3076 8841 3080 8793
      3066 8796 3068 8801 3063 8805 3053 8807
      3051 8809 3036 8810 3035 8821 3037 8825
      3035 8827

$$

1 follow-up statement

681 
WGUS74 KMOB 190007
FFSMOB

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

ALC003-097-190016-
/O.EXP.KMOB.FF.W.0003.000000T0000Z-120219T0015Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BALDWIN AL-MOBILE AL-
607 PM CST SAT FEB 18 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM CST FOR SOUTHERN
MOBILE AND EXTREME WEST CENTRAL BALDWIN 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... 
CONTINUED LIGHT TO MODERATE RAIN CAN CONTINUE TO CREATE PONDING OF 
WATER ON ROADWAYS AND LOW LYING AREAS...WIT A VERY SATURATED GROUND. 
PLEASE DRIVE WITH CAUTION. ALSO...REMAIN ALERT TO RISES ON LOCAL 
STREAMS AND CREEKS.

LAT...LON 3037 8826 3038 8829 3036 8832 3039 8833
      3036 8838 3048 8841 3076 8841 3080 8793
      3066 8796 3068 8801 3063 8805 3053 8807
      3051 8809 3036 8810 3035 8821 3037 8825
      3035 8827

$$

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, 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, 3:13 PM CST	Severe Thunderstorm Warning	MOB	Baldwin, Conecuh, Escambia, Monroe	47 min
Feb 18, 3:28 PM CST	Gale Warning	MOB		21 hr
Feb 18, 3:37 PM CST	Flash Flood Warning	MOB	Baldwin, Clarke, Conecuh, Escambia, Mobile, Monroe and 1 more	113 min
Feb 18, 3:59 PM CST	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	61 min
Feb 18, 4:01 PM CST	Severe Thunderstorm Warning	MOB	Conecuh, Covington, Escambia	44 min
Feb 18, 4:07 PM CST	Special Marine Warning	MOB		83 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, 4:38 PM CST	Severe Thunderstorm Warning	MOB	Conecuh, Covington, Crenshaw, Escambia	52 min
Feb 18, 4:52 PM CST	Flash Flood Warning	MOB	Baldwin	113 min
Feb 18, 4:59 PM CST	Severe Thunderstorm Warning	MOB	Baldwin	76 min
Feb 18, 5:13 PM CST	Flash Flood Warning	MOB	Baldwin, Butler, Conecuh, Covington, Crenshaw, Escambia	2 hr
Feb 18, 5:17 PM CST	Tornado Warning	MOB	Baldwin	28 min
Feb 18, 5:27 PM CST	Special Marine Warning	MOB		93 min

Nearby

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.