Alert archive / Alabama / Freeze Warnings in 2006

Freeze Warning 9, NWS Birmingham, AL

December 7, 200618 counties in Alabama

NWS Birmingham, AL issued this freeze warning at Dec 7, 2006, 4:03 AM CST for 18 counties in Alabama. It took effect at Dec 7, 2006, 9:00 PM CST. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 7, 2006, 4:03 AM CST (10:03 UTC)
In effect from: Dec 7, 2006, 9:00 PM CST
Expired: Dec 8, 2006, 9:00 AM CST
In force: 12 hr
Issued by: NWS Birmingham, AL

Counties Blount County, AL, Calhoun County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Etowah County, AL, Fayette County, AL, Jefferson County, AL, Lamar County, AL, Marion County, AL, Pickens County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL

The radar

The Birmingham radar (KBMX), 57 km from the middle of the area, began a volume at 10:02 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 00:00Z, 10.1 hours before the alert went out and 56 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: 3121 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 167 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 freeze warning 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 freeze warning went out at Dec 6, 11:45 PM CST, 4 hours 18 minutes earlier.

Area forecast discussion, Dec 6, 11:45 PM CST, 4 hours 18 minutes before

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Hazardous weather outlook, Dec 6, 8:00 PM CST, 8 hours 3 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 7, 4:03 AM CST	Lake Wind Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	14 hr
Dec 7, 10:55 AM CST	Wind Advisory	BMX	Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 20 more	7 hr

Nearby

Freeze Warnings in Alabama, 2006 Every freeze warning in 2006

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.