Alert archive / Alabama / Flash Flood Warnings in 2009

Flash Flood Warning 36, NWS Mobile, AL

May 27, 2009Wilcox County, Alabama

NWS Mobile, AL issued this flash flood warning at May 27, 2009, 4:10 PM CDT for Wilcox County, Alabama. It was in force for 65 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: May 27, 2009, 4:10 PM CDT (21:10 UTC)
Expired: May 27, 2009, 5:15 PM CDT
In force: 65 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

County Wilcox County, AL

The radar

The Birmingham radar (KBMX), 121 km from the middle of the area, began a volume at 21:13 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, 9.2 hours before the alert went out and 122 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: 578 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 466 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 61 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.

000 
WGUS54 KMOB 272110
FFWMOB
ALC131-272215-
/O.NEW.KMOB.FF.W.0036.090527T2110Z-090527T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
410 PM CDT WED MAY 27 2009

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 515 PM CDT

* AT 407 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA...WITH A STORM MOVING VERY LITTLE THE LAST HOUR.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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 3225 8741 3225 8739 3224 8738 3216 8738
      3216 8753 3227 8753 3228 8751 3228 8743

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 10:39 AM CDT	Special Marine Warning	MOB		36 min
May 27, 11:13 AM CDT	Special Marine Warning	MOB		47 min
May 27, 1:52 PM CDT	Severe Thunderstorm Warning	MOB	Covington	23 min
May 27, 3:36 PM CDT	Severe Thunderstorm Warning	MOB	Clarke	24 min
May 27, 3:55 PM CDT	Severe Thunderstorm Warning	MOB	Clarke	35 min
May 27, 4:13 PM CDT	Flash Flood Warning	MOB	Clarke	92 min
May 27, 4:29 PM CDT	Severe Thunderstorm Warning	MOB	Wilcox	31 min
May 27, 4:36 PM CDT	Severe Thunderstorm Warning	MOB	Clarke, Washington	24 min
May 27, 5:17 PM CDT	Severe Thunderstorm Warning	MOB	Clarke, Washington	28 min
May 27, 6:07 PM CDT	Areal Flood Advisory	MOB	Clarke, Washington	3 hr
May 27, 6:13 PM CDT	Areal Flood Advisory	MOB	Wilcox	3 hr
May 27, 6:15 PM CDT	Severe Thunderstorm Warning	MOB	Clarke, Washington	30 min
May 27, 6:39 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	36 min
May 27, 6:45 PM CDT	Flash Flood Warning	MOB	Washington	3 hr

Nearby

Flash Flood Warnings in Alabama, 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.