Alert archive / Alabama / Dense Fog Advisories in 2021
Dense Fog Advisory 24, NWS Birmingham, AL
NWS Birmingham, AL issued this dense fog advisory at Dec 26, 2021, 2:48 AM CST for 13 counties in Alabama. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Dec 26, 2021, 2:48 AM CST (08:48 UTC)
- Expired
- Dec 26, 2021, 9:00 AM CST
- In force
- 6 hr
- Issued by
- NWS Birmingham, AL
Counties Barbour County, AL, Blount County, AL, Bullock County, AL, Calhoun County, AL, Cherokee County, AL, Etowah County, AL, Fayette County, AL, Lamar County, AL, Marion County, AL, Pike County, AL, St. Clair County, AL, Walker County, AL, Winston County, AL
The radar
The Birmingham radar (KBMX), 36 km from the middle of the area, began a volume at 08:49 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 00:00Z, 8.8 hours before the alert went out and 195 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.
- Mixed-layer CAPE
- 6 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 891 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 306 m²/s²
- 0-3 km storm-relative helicity
- 339 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
Nearby
Dense Fog Advisories in Alabama, 2021Every dense fog advisory in 2021
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.