Alert archive / Alabama / Flash Flood Warnings in 2012

Flash Flood Warning 20, NWS Birmingham, AL

July 30, 2012Pike County, Alabama

NWS Birmingham, AL issued this flash flood warning at Jul 30, 2012, 8:13 PM CDT for Pike County, Alabama. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 30, 2012, 8:13 PM CDT (01:13 UTC)
Expired: Jul 30, 2012, 11:00 PM CDT
In force: 3 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

County Pike County, AL

What was reported inside it

Time	Report	Where	Remark
Jul 30, 8:15 PM CDT	FLASH FLOOD	2 E Henderson, AL	COUNTY ROAD 2262 EAST OF HENDERSON BECAME IMPASSIBLE AND WAS CLOSED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.2 hours before the alert went out and 182 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: 771 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 1852 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

971 
WGUS54 KBMX 310113
FFWBMX
ALC109-310400-
/O.NEW.KBMX.FF.W.0020.120731T0113Z-120731T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
813 PM CDT MON JUL 30 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL PIKE COUNTY IN SOUTHEAST ALABAMA...

* UNTIL 1100 PM CDT

* AT 811 PM CDT...NATIONAL WEATHER SERVICE INDICATED SUCCESSIVE 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. MORE 
THAN 5 INCHES OF RAIN HAS LIKELY FALLEN IN THIS AREA SINCE 5 PM.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. FLASH FLOODING IS EXPECTED TO OCCUR OVER MAINLY RURAL AREAS
  OF SOUTH CENTRAL PIKE COUNTY...INCLUDING THE TOWNS OF HENDERSON AND
  MOSSY GROVE.

SOME COUNTY ROADS IN THE AREA HAVE STARTED TO BECOME FLOODED...AND 
WILL LIKELY NEED TO BE CLOSED WITH MORE HEAVY RAIN EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

&&

TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758.

LAT...LON 3162 8612 3178 8607 3177 8593 3161 8594
      3161 8612

$$

61

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 7:18 PM CDT	Severe Thunderstorm Warning	BMX	Pike	27 min
Jul 30, 7:25 PM CDT	Areal Flood Advisory	BMX	Pike	3 hr
Jul 30, 11:57 PM CDT	Severe Thunderstorm Warning	BMX	Marion	78 min
Jul 31, 12:15 AM CDT	Special Weather Statement	BMX	Walker, Winston	45 min
Jul 31, 12:27 AM CDT	Special Weather Statement	BMX	St. Clair	48 min
Jul 31, 12:32 AM CDT	Severe Thunderstorm Warning	BMX	Blount	43 min
Jul 31, 12:34 AM CDT	Severe Thunderstorm Warning	BMX	Winston	56 min
Jul 31, 12:48 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, St. Clair	57 min
Jul 31, 12:57 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Walker	48 min
Jul 31, 1:01 AM CDT	Severe Thunderstorm Warning	BMX	Fayette, Walker	74 min
Jul 31, 1:24 AM CDT	Areal Flood Advisory	BMX	Winston	2 hr
Jul 31, 1:36 AM CDT	Areal Flood Advisory	BMX	Jefferson, St. Clair, Shelby, Walker	3 hr
Jul 31, 1:40 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Shelby, Talladega	65 min
Jul 31, 1:53 AM CDT	Flash Flood Warning	BMX	Jefferson	3 hr
Jul 31, 2:10 AM CDT	Flash Flood Warning	BMX	Shelby	3 hr
Jul 31, 2:20 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Coosa	70 min
Jul 31, 2:40 AM CDT	Special Weather Statement	BMX	Marion, Winston	65 min
Jul 31, 3:01 AM CDT	Severe Thunderstorm Warning	BMX	Autauga	74 min
Jul 31, 3:06 AM CDT	Special Weather Statement	BMX	Winston	24 min
Jul 31, 3:14 AM CDT	Severe Thunderstorm Warning	BMX	Elmore	44 min
Jul 31, 3:20 AM CDT	Severe Thunderstorm Warning	BMX	Marion, Walker, Winston	55 min
Jul 31, 3:37 AM CDT	Special Weather Statement	BMX	Lowndes, Montgomery	53 min
Jul 31, 4:09 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Shelby, Walker	71 min
Jul 31, 4:38 AM CDT	Flash Flood Warning	BMX	Jefferson, Shelby	3 hr
Jul 31, 4:40 AM CDT	Severe Thunderstorm Warning	BMX	Chilton, Jefferson, Shelby, Walker	39 min
Jul 31, 6:11 AM CDT	Special Weather Statement	BMX	Dallas, Hale, Perry	49 min
Jul 31, 6:36 AM CDT	Special Weather Statement	BMX	Blount, Etowah, St. Clair	39 min
Jul 31, 7:28 AM CDT	Flash Flood Warning	BMX	Jefferson, Shelby	3 hr
Jul 31, 8:32 AM CDT	Flash Flood Warning	BMX	Lowndes	2 hr
Jul 31, 8:44 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, St. Clair, Shelby, Talladega, Walker	46 min
Jul 31, 9:08 AM CDT	Severe Thunderstorm Warning	BMX	Chilton, Coosa, Shelby, Talladega	26 min
Jul 31, 10:30 AM CDT	Areal Flood Warning	BMX	Jefferson, Shelby	6 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.