Alert archive / Alabama / Flash Flood Watches in 2014

Flash Flood Watch 1, NWS Birmingham, AL

April 5, 201439 counties in Alabama

NWS Birmingham, AL issued this flash flood watch at Apr 5, 2014, 8:18 PM CDT for 39 counties in Alabama. It took effect at Apr 6, 2014, 10:00 AM CDT. It was in force for 23 hr.

The area

The counties it named.

The facts

Issued: Apr 5, 2014, 8:18 PM CDT (01:18 UTC)
In effect from: Apr 6, 2014, 10:00 AM CDT
Expired: Apr 7, 2014, 9:28 AM CDT
In force: 23 hr
Issued by: NWS Birmingham, AL
Flood severity: None

All 39 counties

Autauga County, AL, Barbour County, AL, Bibb County, AL, Blount County, AL, Bullock County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Etowah County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Marion County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL

The radar

The Birmingham radar (KBMX), 22 km from the middle of the area, began a volume at 01:19 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.3 hours before the alert went out and 198 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: 2528 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Birmingham, AL wrote its last area forecast discussion before this flash flood watch went out at Apr 5, 6:43 PM CDT, 1 hour 35 minutes earlier.

Area forecast discussion, Apr 5, 6:43 PM CDT, 1 hour 35 minutes before

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Hazardous weather outlook, Apr 5, 6:45 PM CDT, 1 hour 33 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 8:51 AM CDT	River Flood Warning	BMX	Bibb, Dallas, Perry	3 days
Apr 6, 8:51 AM CDT	River Flood Warning	BMX	Bibb, Jefferson, Shelby	59 hr
Apr 6, 10:15 AM CDT	Areal Flood Advisory	BMX	Marengo, Sumter	3 hr
Apr 6, 11:46 AM CDT	Areal Flood Advisory	BMX	Barbour, Pike	3 hr
Apr 6, 2:43 PM CDT	River Flood Warning	BMX	Greene, Hale, Marengo, Sumter	5 days
Apr 6, 3:04 PM CDT	River Flood Warning	BMX	Dallas, Perry	6 days
Apr 6, 3:13 PM CDT	River Flood Warning	BMX	Montgomery	3 days
Apr 6, 5:08 PM CDT	Special Weather Statement	BMX	Marengo	52 min
Apr 6, 5:21 PM CDT	Severe Thunderstorm Warning	BMX	Marengo	39 min
Apr 6, 5:44 PM CDT	Severe Thunderstorm Warning	BMX	Dallas, Perry	61 min
Apr 6, 6:46 PM CDT	Areal Flood Advisory	BMX	Dallas, Lowndes, Marengo, Perry	3 hr

Nearby

Flash Flood Watches in Alabama, 2014 Every flash flood watch 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.