Alert archive / Alabama / Freezing Rain Advisories in 2015

Freezing Rain Advisory 2, NWS Birmingham, AL

March 4, 201512 counties in Alabama

NWS Birmingham, AL issued this freezing rain advisory at Mar 4, 2015, 12:50 PM CST for 12 counties in Alabama. It took effect at Mar 5, 2015, 3:00 AM CST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Mar 4, 2015, 12:50 PM CST (18:50 UTC)
In effect from
Mar 5, 2015, 3:00 AM CST
Expired
Mar 5, 2015, 1:18 PM CST
In force
10 hr
Issued by
NWS Birmingham, AL

Counties Bibb County, AL, Calhoun County, AL, Cherokee County, AL, Etowah County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Pickens County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Tuscaloosa County, AL

The radar

The Birmingham radar (KBMX), 29 km from the middle of the area, began a volume at 18:48 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

Nashville Metro, TN (KBNA), launched 12:00Z, 6.8 hours before the alert went out and 310 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, Nashville Metro, TN at 12:00Z on 2015-03-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Nashville Metro, TN at 12:00Z on 2015-03-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 191 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
580 m above ground
0-6 km bulk shear
82 kt
0-1 km storm-relative helicity
191 m²/s²
0-3 km storm-relative helicity
359 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 4, 12:50 PM CSTWinter Storm WarningBMXBlount, Fayette, Jefferson, Lamar, Marion, Pickens and 3 more26 hr

Nearby

Freezing Rain Advisories in Alabama, 2015Every freezing rain advisory in 2015

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.