Alert archive / Alabama / Flash Flood Warnings in 2014

Flash Flood Warning 9, NWS Mobile, AL

April 6, 20147 counties in Alabama

NWS Mobile, AL issued this flash flood warning at Apr 6, 2014, 6:13 PM CDT for 7 counties in Alabama. It was in force for 6 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: Apr 6, 2014, 6:13 PM CDT (23:13 UTC)
Expired: Apr 7, 2014, 12:15 AM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Butler County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Monroe County, AL, Wilcox County, AL

The radar

The Maxwell AFB radar (KMXX), 131 km from the middle of the area, began a volume at 23:13 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, 11.2 hours before the alert went out and 144 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: 656 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 110 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.

147 
WGUS54 KMOB 062313
FFWMOB
ALC013-025-035-039-041-099-131-070515-
/O.NEW.KMOB.FF.W.0009.140406T2313Z-140407T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
613 PM CDT SUN APR 6 2014

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BUTLER COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHEASTERN CONECUH COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHERN COVINGTON COUNTY IN SOUTH CENTRAL ALABAMA...
  CRENSHAW COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHERN MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
  WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHERN CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 1215 AM CDT

* AT 613 PM CDT...VERY HEAVY RAINFALL WAS INDICATED OVER AND
  UPSTREAM OF THE WARNED AREA.  RADAR ESTIMATES BETWEEN 2 AND 5
  INCHES OF RAIN HAS FALLEN...MOSTLY SINCE LAST EVENING. 

  AS ADDITIONAL THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUALLY
  REDEVELOP AND MOVE OVER THE SAME AREAS...EXPECT RAINFALL RATES OF
  A CONTINUED ONE TO TWO INCHES PER HOUR. SINCE GROUNDS ARE SO
  WET...FLASH FLOODING CAN BEGIN WITH AS LITTLE AS ONE INCH OF RAIN
  PER HOUR.
  
* LOCATIONS IMPACTED INCLUDE...
  BOYKIN...             YELLOW BLUFF...       PINE HILL...
  PINE APPLE...         OAK HILL...           CATHERINE...
  CAMDEN...             RUTLEDGE...           PETREY...

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!

&&

LAT...LON 3144 8623 3171 8809 3190 8813 3193 8805
      3195 8812 3199 8807 3201 8763 3228 8750
      3205 8717 3205 8686 3197 8685 3197 8641
      3205 8640 3206 8630 3197 8629 3196 8618
      3180 8620 3179 8616 3154 8614

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 10:54 PM CDT	Small Craft Advisory	MOB		39 hr
Apr 6, 5:45 AM CDT	Areal Flood Advisory	MOB	Choctaw, Clarke, Monroe, Washington, Wilcox	3 hr
Apr 6, 6:34 AM CDT	Rip Current Statement	MOB		60 hr
Apr 6, 9:43 AM CDT	Marine Dense Fog Advisory	MOB		3 hr
Apr 6, 3:03 PM CDT	River Flood Warning	MOB	Dallas, Monroe, Wilcox	9 days
Apr 6, 3:03 PM CDT	River Flood Warning	MOB	Clarke, Monroe, Wilcox	13 days
Apr 6, 3:03 PM CDT	River Flood Warning	MOB	Escambia	4 days
Apr 6, 5:27 PM CDT	Flash Flood Warning	MOB	Choctaw	6 hr

Nearby

Flash Flood Warnings in Alabama, 2014 Every flash flood warning in 2014

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.