Alert archive / Alabama / Flash Flood Watches in 2008

Flash Flood Watch 5, NWS Birmingham, AL

December 10, 200830 counties in Alabama

NWS Birmingham, AL issued this flash flood watch at Dec 10, 2008, 3:24 PM CST for 30 counties in Alabama. It took effect at Dec 10, 2008, 4:00 PM CST. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued: Dec 10, 2008, 3:24 PM CST (21:24 UTC)
In effect from: Dec 10, 2008, 4:00 PM CST
Expired: Dec 11, 2008, 11:41 AM CST
In force: 20 hr
Issued by: NWS Birmingham, AL
Flood severity: None

All 30 counties

Autauga County, AL, Barbour 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, Elmore County, AL, Etowah County, AL, Fayette County, AL, Jefferson County, AL, Lamar County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marion County, AL, Montgomery County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Walker County, AL, Winston County, AL

The radar

The Birmingham radar (KBMX), 46 km from the middle of the area, began a volume at 21:27 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, 9.4 hours before the alert went out and 47 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: 674 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: -153 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Dec 10, 11:45 AM CST, 3 hours 39 minutes earlier.

Area forecast discussion, Dec 10, 11:45 AM CST, 3 hours 39 minutes before

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Hazardous weather outlook, Dec 10, 12:33 PM CST, 2 hours 51 minutes before

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In the hours before

Local storm report, Dec 10, 12:22 PM CST, 3 hours 2 minutes before

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Local storm report, Dec 10, 12:29 PM CST, 2 hours 55 minutes before

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Local storm report, Dec 10, 1:25 PM CST, 1 hour 59 minutes before

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Local storm report, Dec 10, 2:26 PM CST, 58 minutes before

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Local storm report, Dec 10, 2:38 PM CST, 46 minutes before

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Local storm report, Dec 10, 2:39 PM CST, 45 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
Dec 9, 8:52 PM CST	Flash Flood Watch	BMX	Fayette, Lamar, Marion, Pickens, Walker, Winston	7 hr
Dec 9, 9:15 PM CST	Severe Thunderstorm Warning	BMX	Lamar, Marion	45 min
Dec 9, 9:45 PM CST	Areal Flood Advisory	BMX	Fayette, Lamar, Marion, Walker, Winston	3 hr
Dec 9, 9:59 PM CST	Severe Thunderstorm Warning	BMX	Lamar, Marion	31 min
Dec 9, 10:01 PM CST	Tornado Warning	BMX	Pickens	44 min
Dec 9, 10:47 PM CST	Severe Thunderstorm Warning	BMX	Fayette, Greene, Pickens, Tuscaloosa, Walker	43 min
Dec 9, 11:01 PM CST	Flash Flood Warning	BMX	Fayette, Lamar, Marion, Winston	3 hr
Dec 9, 11:13 PM CST	Tornado Warning	BMX	Greene, Pickens	32 min
Dec 9, 11:36 PM CST	Severe Thunderstorm Warning	BMX	Fayette, Pickens, Tuscaloosa, Walker, Winston	39 min
Dec 9, 11:45 PM CST	Severe Thunderstorm Warning	BMX	Pickens, Tuscaloosa	30 min
Dec 10, 12:06 AM CST	Tornado Warning	BMX	Fayette, Tuscaloosa, Walker	24 min
Dec 10, 12:22 AM CST	Severe Thunderstorm Warning	BMX	Greene, Hale, Pickens, Sumter	38 min
Dec 10, 12:31 AM CST	Tornado Warning	BMX	Fayette, Walker	29 min
Dec 10, 12:41 AM CST	Severe Thunderstorm Warning	BMX	Blount, Fayette, Jefferson, Tuscaloosa, Walker	49 min
Dec 10, 12:50 AM CST	Tornado Warning	BMX	Pickens, Tuscaloosa	40 min
Dec 10, 12:55 AM CST	Severe Thunderstorm Warning	BMX	Greene, Hale, Pickens, Sumter, Tuscaloosa	50 min
Dec 10, 12:59 AM CST	Tornado Warning	BMX	Walker, Winston	16 min
Dec 10, 1:09 AM CST	Tornado Warning	BMX	Blount, Walker	6 min
Dec 10, 1:31 AM CST	Severe Thunderstorm Warning	BMX	Greene, Hale, Pickens, Sumter, Tuscaloosa	44 min
Dec 10, 1:32 AM CST	Tornado Warning	BMX	Pickens, Tuscaloosa	28 min
Dec 10, 1:55 AM CST	Tornado Warning	BMX	Jefferson	9 min
Dec 10, 1:57 AM CST	Severe Thunderstorm Warning	BMX	Blount, Jefferson, Walker	33 min
Dec 10, 2:00 AM CST	Severe Thunderstorm Warning	BMX	Fayette, Jefferson, Tuscaloosa, Walker	30 min
Dec 10, 2:12 AM CST	Severe Thunderstorm Warning	BMX	Greene, Hale, Marengo, Sumter, Tuscaloosa	48 min
Dec 10, 2:26 AM CST	Tornado Warning	BMX	Blount, Etowah	34 min
Dec 10, 2:32 AM CST	Severe Thunderstorm Warning	BMX	Blount, Jefferson	28 min
Dec 10, 3:07 AM CST	Severe Thunderstorm Warning	BMX	Marengo, Sumter	23 min
Dec 10, 3:11 AM CST	Severe Thunderstorm Warning	BMX	Bibb, Tuscaloosa	34 min
Dec 10, 3:28 AM CST	Tornado Warning	BMX	Autauga, Chilton, Dallas	34 min
Dec 10, 3:38 AM CST	Severe Thunderstorm Warning	BMX	Jefferson	37 min
Dec 10, 4:17 AM CST	Tornado Warning	BMX	Cherokee	13 min
Dec 10, 4:38 AM CST	Tornado Warning	BMX	St. Clair	20 min
Dec 10, 4:40 AM CST	Tornado Warning	BMX	Lowndes, Montgomery	35 min
Dec 10, 4:44 AM CST	Flash Flood Warning	BMX	Jefferson	3 hr
Dec 10, 5:07 AM CST	Tornado Warning	BMX	Bibb, Chilton, Dallas, Perry	23 min
Dec 10, 5:32 AM CST	Tornado Warning	BMX	Coosa, Tallapoosa	28 min
Dec 10, 6:24 AM CST	Tornado Warning	BMX	Pike	51 min
Dec 10, 6:43 AM CST	Severe Thunderstorm Warning	BMX	Pike	47 min
Dec 10, 6:49 AM CST	Tornado Warning	BMX	Cleburne, Randolph	15 min
Dec 10, 6:51 AM CST	River Flood Warning	BMX	Greene, Hale, Marengo, Pickens, Sumter	6 days
Dec 10, 6:51 AM CST	River Flood Warning	BMX	Greene, Hale, Marengo, Sumter	6 days
Dec 10, 7:18 AM CST	Tornado Warning	BMX	Coosa, Tallapoosa	27 min
Dec 10, 7:41 AM CST	Severe Thunderstorm Warning	BMX	Barbour, Pike	49 min
Dec 10, 8:24 AM CST	Severe Thunderstorm Warning	BMX	Barbour	36 min
Dec 10, 9:56 AM CST	Areal Flood Advisory	BMX	Barbour, Pike	4 hr
Dec 10, 3:54 PM CST	Winter Storm Watch	BMX	Fayette, Lamar, Marion, Pickens, Walker, Winston	12 hr
Dec 10, 4:01 PM CST	Lake Wind Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	29 hr

Nearby

Flash Flood Watches in Alabama, 2008 Every flash flood watch in 2008

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.