Alert archive / Alabama / Frost Advisories in 2024

Frost Advisory 4, NWS Birmingham, AL

March 23, 202418 counties in Alabama

NWS Birmingham, AL issued this frost advisory at Mar 23, 2024, 12:16 PM CDT for 18 counties in Alabama. It took effect at Mar 24, 2024, 3:00 AM CDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Mar 23, 2024, 12:16 PM CDT (17:16 UTC)
In effect from: Mar 24, 2024, 3:00 AM CDT
Expired: Mar 24, 2024, 8:00 AM CDT
In force: 5 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 17:17 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, 5.3 hours before the alert went out and 208 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: 931 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -49 m²/s²
0-3 km storm-relative helicity: -28 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 frost 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 frost advisory went out at Mar 23, 7:29 AM CDT, 4 hours 47 minutes earlier.

Area forecast discussion, Mar 23, 7:29 AM CDT, 4 hours 47 minutes before

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Hazardous weather outlook, Mar 23, 4:23 AM CDT, 7 hours 53 minutes before

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Nearby

Frost Advisories in Alabama, 2024 Every frost advisory in 2024

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.