Alert archive / Alabama / Flash Flood Watches in 2014

Flash Flood Watch 6, NWS Birmingham, AL

December 22, 201410 counties in Alabama

NWS Birmingham, AL issued this flash flood watch at Dec 22, 2014, 3:58 PM CST for 10 counties in Alabama. It took effect at Dec 23, 2014, 6:00 AM CST. It was in force for 24 hr.

The area

The counties it named.

The facts

Issued
Dec 22, 2014, 3:58 PM CST (21:58 UTC)
In effect from
Dec 23, 2014, 6:00 AM CST
Expired
Dec 24, 2014, 6:00 AM CST
In force
24 hr
Issued by
NWS Birmingham, AL
Flood severity
None

Counties Autauga County, AL, Barbour County, AL, Bullock County, AL, Elmore County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Russell County, AL

The radar

The Maxwell AFB radar (KMXX), 33 km from the middle of the area, began a volume at 22:00 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, 10.0 hours before the alert went out and 132 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-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2014-12-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2014-12-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 207 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
2 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
438 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
207 m²/s²
0-3 km storm-relative helicity
275 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 Dec 22, 12:32 PM CST, 3 hours 26 minutes earlier.

Area forecast discussion, Dec 22, 12:32 PM CST, 3 hours 26 minutes before
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Hazardous weather outlook, Dec 22, 2:19 PM CST, 1 hour 39 minutes before
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In the hours before

Special weather statement, Dec 22, 1:47 PM CST, 2 hours 11 minutes before
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Local storm report, Dec 22, 1:58 PM CST, 2 hours before
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Local storm report, Dec 22, 2:43 PM CST, 1 hour 15 minutes before
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Special weather statement, Dec 22, 3:05 PM CST, 53 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Dec 22, 1:47 PM CSTSpecial Weather StatementBMXMontgomery43 min
Dec 22, 3:05 PM CSTSpecial Weather StatementBMXBlount25 min

Nearby

Flash Flood Watches in Alabama, 2014Every 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.