Alert archive / Alabama / Flash Flood Warnings in 2016

Flash Flood Warning 4, NWS Birmingham, AL

March 31, 20165 counties in Alabama

NWS Birmingham, AL issued this flash flood warning at Mar 31, 2016, 10:42 PM CDT for 5 counties in Alabama. It was in force for 3 hr. 3 reports 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: Mar 31, 2016, 10:42 PM CDT (03:42 UTC)
Expired: Apr 1, 2016, 1:45 AM CDT
In force: 3 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

Counties Autauga County, AL, Dallas County, AL, Elmore County, AL, Lowndes County, AL, Montgomery County, AL

The radar

The Maxwell AFB radar (KMXX), 67 km from the middle of the area, began a volume at 03:42 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.

What was reported inside it

Time	Report	Where	Remark
Mar 31, 11:30 PM CDT	FLASH FLOOD	Prattville, AL	SEVERAL STREETS IN THE CITY OF PRATTVILLE ARE UNDER WATER AND CLOSED. VEHICLE STRANDED IN HIGH WATER AND WATER RESCUE NEEDED. CORRECTED TIME.
Apr 1, 12:00 AM CDT	FLASH FLOOD	1 Se Autaugaville, AL	REPORT OF 60 RESIDENTS TRAPPED DUE TO FLASH FLOODING THAT UNDERMINED A PORTION OF STRICKLAND LANDING ROAD. LOCATION APPROXIMATE. TIME ESTIMATED.
Apr 1, 12:19 AM CDT	FLASH FLOOD	5 Ne Millbrook, AL	SOUTHBOUND LANE OF ALABAMA HIGHWAY 143 FROM DUNCAN ROAD TO ALABAMA HIGHWAY 14 CLOSED DUE TO FLASH FLOODING.

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, 3.7 hours before the alert went out and 82 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: 693 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 764 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 294 m²/s²
0-3 km storm-relative helicity: 366 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 6.4

Open this sounding in Storm Lab

The text

As transmitted.

619 
WGUS54 KBMX 010342
FFWBMX
ALC001-047-051-085-101-010645-
/O.NEW.KBMX.FF.W.0004.160401T0342Z-160401T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1042 PM CDT THU MAR 31 2016

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN LOWNDES COUNTY IN SOUTH CENTRAL ALABAMA...
  SOUTHWESTERN ELMORE COUNTY IN EAST CENTRAL ALABAMA...
  AUTAUGA COUNTY IN CENTRAL ALABAMA...
  NORTHWESTERN MONTGOMERY COUNTY IN SOUTH CENTRAL ALABAMA...
  SOUTHEASTERN DALLAS COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 145 AM CDT

* AT 1041 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  NORTHWESTERN MONTGOMERY...PRATTVILLE...SELMA...MILLBROOK...WETUMPKA...
  SELMONT-WEST SELMONT...ELMORE...COOSADA...DEATSVILLE...AUTAUGAVILLE...
  WHITE HALL...LOWNDESBORO...BENTON...MEMORIAL STADIUM...JORDAN LAKE...
  BOYLSTON...ALABAMA STATE UNIVERSITY...WOODCREST...VIDA JUNCTION AND
  LAGOON PARK.

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3255 8597 3230 8638 3217 8709 3247 8711
      3255 8678 3274 8623

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 7:02 PM CDT	Tornado Warning	BMX	Fayette	43 min
Mar 31, 7:22 PM CDT	Severe Thunderstorm Warning	BMX	Winston	9 min
Mar 31, 7:29 PM CDT	Tornado Warning	BMX	Marion, Walker	46 min
Mar 31, 7:34 PM CDT	Severe Thunderstorm Warning	BMX	Sumter	41 min
Mar 31, 7:56 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Pickens	49 min
Mar 31, 7:59 PM CDT	Tornado Warning	BMX	Fayette, Walker	46 min
Mar 31, 8:05 PM CDT	Severe Thunderstorm Warning	BMX	Tuscaloosa	55 min
Mar 31, 8:24 PM CDT	Severe Thunderstorm Warning	BMX	Hale	51 min
Mar 31, 9:17 PM CDT	Tornado Warning	BMX	Blount, Jefferson	32 min
Mar 31, 9:30 PM CDT	Areal Flood Advisory	BMX	Autauga, Dallas, Lowndes	3 hr
Mar 31, 11:07 PM CDT	River Flood Warning	BMX	Montgomery	69 hr
Mar 31, 11:17 PM CDT	Severe Thunderstorm Warning	BMX	Elmore, Macon, Montgomery, Tallapoosa	43 min
Mar 31, 11:55 PM CDT	Special Weather Statement	BMX	Lee, Macon	65 min
Apr 1, 12:14 AM CDT	Special Weather Statement	BMX	Pickens	46 min
Apr 1, 1:03 AM CDT	Special Weather Statement	BMX	Perry	42 min
Apr 1, 1:53 AM CDT	Special Weather Statement	BMX	Shelby	37 min
Apr 1, 2:33 AM CDT	Special Weather Statement	BMX	Lowndes	27 min
Apr 1, 2:36 AM CDT	Flash Flood Warning	BMX	Autauga, Dallas, Elmore, Lowndes, Montgomery	3 hr
Apr 1, 3:06 AM CDT	Special Weather Statement	BMX	Jefferson	39 min
Apr 1, 3:29 AM CDT	Special Weather Statement	BMX	Lee, Macon, Tallapoosa	46 min
Apr 1, 4:38 AM CDT	Areal Flood Advisory	BMX	Lee	3 hr
Apr 1, 5:16 AM CDT	River Flood Warning	BMX	Sumter	45 hr
Apr 1, 6:07 AM CDT	Special Weather Statement	BMX	Barbour	38 min
Apr 1, 6:22 AM CDT	Special Weather Statement	BMX	Barbour	38 min
Apr 1, 10:23 AM CDT	Special Weather Statement	BMX	Montgomery	52 min
Apr 1, 10:24 AM CDT	Special Weather Statement	BMX	Lowndes	51 min
Apr 1, 10:52 AM CDT	Areal Flood Advisory	BMX	Autauga, Barbour, Bullock, Dallas, Elmore, Lee and 7 more	113 min
Apr 1, 10:57 AM CDT	Special Weather Statement	BMX	Autauga	48 min
Apr 1, 11:03 AM CDT	Special Weather Statement	BMX	Macon	27 min

Nearby

Flash Flood Warnings in Alabama, 2016 Every flash flood warning in 2016

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; radar from the NEXRAD Level II archive.