Alert archive / Alabama / Flash Flood Warnings in 2013

Flash Flood Warning 6, NWS Mobile, AL

February 25, 2013Mobile County, Alabama

NWS Mobile, AL issued this flash flood warning at Feb 25, 2013, 4:49 AM CST for Mobile County, Alabama. 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: Feb 25, 2013, 4:49 AM CST (10:49 UTC)
Expired: Feb 25, 2013, 7:45 AM CST
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), 11 km from the middle of the area, began a volume at 10:50 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 00:00Z, 10.8 hours before the alert went out and 157 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: 902 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

732 
WGUS54 KMOB 251049
FFWMOB
ALC097-251345-
/O.NEW.KMOB.FF.W.0006.130225T1049Z-130225T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
449 AM CST MON FEB 25 2013

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 745 AM CST

* AT 436 AM CST...VERY HEAVY RAINFALL WAS INDICATED OVER THE WARNED
  AREA AND RADAR ESTIMATES SHOW 1 TO 2 INCHES OF RAINFALL HAS
  OCCURRED OVER THE PAST HOUR WHICH HAS FALLEN ON SATURATED          
  GROUND. ADDITIONAL RAINFALL IS LIKELY THROUGH 8 AM. THIS           
  WILL LIKELY CAUSE FLASH FLOODING IN THE WARNED AREA.

* LOCATIONS IMPACTED INCLUDE...
  REGIONAL AIRPORT IN WEST MOBILE...          MIDTOWN MOBILE...
  DOWNTOWN MOBILE...    TILLMANS CORNER...    THEODORE...
  PRICHARD...           I65 AND US 45...      I65 AND I165...
  I10 AND I65...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

NEVER TRY TO CROSS OR PLAY IN AN URBAN SPILLWAY OR FLOWING CREEK...
EVEN A SMALL ONE. URBAN FLASH FLOODING IS A MAJOR KILLER.

&&

LAT...LON 3073 8840 3077 8802 3075 8803 3074 8801
      3066 8802 3063 8805 3060 8805 3058 8806
      3057 8808 3054 8807 3047 8839

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 24, 8:31 PM CST	Special Marine Warning	MOB		89 min
Feb 24, 10:15 PM CST	Special Marine Warning	MOB		90 min
Feb 24, 10:52 PM CST	Special Marine Warning	MOB		53 min
Feb 25, 2:34 AM CST	Areal Flood Advisory	MOB	Mobile	116 min
Feb 25, 3:15 AM CST	Special Marine Warning	MOB		60 min
Feb 25, 3:32 AM CST	Severe Thunderstorm Warning	MOB	Mobile	58 min
Feb 25, 4:01 AM CST	Areal Flood Advisory	MOB	Baldwin	119 min
Feb 25, 4:23 AM CST	Gale Warning	MOB		38 hr
Feb 25, 4:33 AM CST	Areal Flood Advisory	MOB	Choctaw, Clarke, Washington	117 min
Feb 25, 4:39 AM CST	Flash Flood Warning	MOB	Baldwin	6 hr
Feb 25, 4:59 AM CST	Special Marine Warning	MOB		91 min
Feb 25, 5:34 AM CST	Special Marine Warning	MOB		86 min
Feb 25, 6:59 AM CST	Special Marine Warning	MOB		91 min
Feb 25, 8:28 AM CST	Special Marine Warning	MOB		92 min
Feb 25, 9:53 AM CST	Special Marine Warning	MOB		97 min
Feb 25, 11:33 AM CST	Areal Flood Warning	MOB	Baldwin, Conecuh, Covington, Escambia, Mobile	6 hr
Feb 25, 12:22 PM CST	Special Marine Warning	MOB		38 min
Feb 25, 3:36 PM CST	Wind Advisory	MOB	Butler, Choctaw, Clarke, Conecuh, Covington, Crenshaw and 4 more	26 hr

Nearby

Flash Flood Warnings in Alabama, 2013 Every flash flood warning in 2013

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.