Alert archive / Alabama / Freezing Rain Advisories in 2011

Freezing Rain Advisory 1, NWS Birmingham, AL

January 10, 201134 counties in Alabama

NWS Birmingham, AL issued this freezing rain advisory at Jan 10, 2011, 1:17 AM CST for 34 counties in Alabama. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Jan 10, 2011, 1:17 AM CST (07:17 UTC)
Expired: Jan 10, 2011, 1:34 PM CST
In force: 12 hr
Issued by: NWS Birmingham, AL

All 34 counties

Autauga County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Calhoun County, AL, Chambers County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Dallas County, AL, Elmore 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, 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

The radar

The Birmingham radar (KBMX), 36 km from the middle of the area, began a volume at 07:21 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, 7.3 hours before the alert went out and 37 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: 909 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 531 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 freezing rain advisory 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 freezing rain advisory went out at Jan 9, 5:58 PM CST, 7 hours 19 minutes earlier.

Area forecast discussion, Jan 9, 5:58 PM CST, 7 hours 19 minutes before

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Hazardous weather outlook, Jan 9, 1:24 PM CST, 11 hours 53 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 10, 5:23 AM CST	Winter Weather Advisory	BMX	Blount, Cherokee, Etowah, Marion, Winston	8 hr

Nearby

Freezing Rain Advisories in Alabama, 2011 Every freezing rain advisory in 2011

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.