Alert archive / Alabama / Freeze Warnings in 2008

Freeze Warning 5, NWS Birmingham, AL

October 27, 200812 counties in Alabama

NWS Birmingham, AL issued this freeze warning at Oct 27, 2008, 2:55 PM CDT for 12 counties in Alabama. It took effect at Oct 28, 2008, 3:00 AM CDT. It was in force for 5 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: Oct 27, 2008, 2:55 PM CDT (19:55 UTC)
In effect from: Oct 28, 2008, 3:00 AM CDT
Expired: Oct 28, 2008, 8:00 AM CDT
In force: 5 hr
Issued by: NWS Birmingham, AL

Counties Blount County, AL, Calhoun County, AL, Cherokee County, AL, Cleburne County, AL, Etowah County, AL, Fayette County, AL, Lamar County, AL, Marion County, AL, Randolph County, AL, St. Clair County, AL, Walker County, AL, Winston County, AL

The radar

The Birmingham radar (KBMX), 77 km from the middle of the area, began a volume at 19:58 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 12:00Z, 7.9 hours before the alert went out and 206 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: 751 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: -194 m²/s²
0-3 km storm-relative helicity: 19 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 Oct 27, 2:35 PM CDT, 20 minutes earlier.

Area forecast discussion, Oct 27, 2:35 PM CDT, 20 minutes before

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Hazardous weather outlook, Oct 27, 1:00 PM CDT, 1 hour 55 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
Oct 27, 2:16 AM CDT	Lake Wind Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	16 hr
Oct 27, 4:00 AM CDT	Freeze Watch	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	23 hr

Nearby

Freeze Warnings in Alabama, 2008 Every freeze warning 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.