Alert archive / Alabama / Wind Advisories in 2021
Wind Advisory 11, NWS Birmingham, AL
NWS Birmingham, AL issued this wind advisory at Dec 10, 2021, 12:38 PM CST for 19 counties in Alabama. It took effect at Dec 10, 2021, 9:00 PM CST. It was in force for 16 hr.
The area
The counties it named.
The facts
- Issued
- Dec 10, 2021, 12:38 PM CST (18:38 UTC)
- In effect from
- Dec 10, 2021, 9:00 PM CST
- Expired
- Dec 11, 2021, 1:00 PM CST
- In force
- 16 hr
- Issued by
- NWS Birmingham, AL
Counties Bibb County, AL, 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), 53 km from the middle of the area, began a volume at 18:38 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 12:00Z, 6.6 hours before the alert went out and 52 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
- 39 J/kg
- Mixed-layer CIN
- -110 J/kg
- Mixed-layer LCL
- 463 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 254 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
667 WWUS74 KBMX 101838 NPWBMX URGENT - WEATHER MESSAGE National Weather Service Birmingham AL 1238 PM CST Fri Dec 10 2021 ALZ011>015-017>021-024-026-110900- /O.NEW.KBMX.WI.Y.0011.211211T0300Z-211211T1900Z/ Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun- Cherokee-Cleburne-Jefferson-St. Clair- Including the cities of Hamilton, Sulligent, Vernon, Fayette, Double Springs, Jasper, Oneonta, Gadsden, Anniston, Centre, Heflin, Birmingham, Hoover, Pell City, and Moody 1238 PM CST Fri Dec 10 2021 ...WIND ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 1 PM CST SATURDAY... * WHAT...Southwest winds 15 to 20 mph with gusts up to 35 mph expected. * WHERE...Northern portions of central Alabama. * WHEN...From 9 PM this evening to 1 PM CST Saturday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
1 follow-up statement
772 WWUS74 KBMX 110510 NPWBMX URGENT - WEATHER MESSAGE National Weather Service Birmingham AL 1110 PM CST Fri Dec 10 2021 ALZ022-023-025-027>029-034-111900- /O.EXA.KBMX.WI.Y.0011.000000T0000Z-211211T1900Z/ Pickens-Tuscaloosa-Shelby-Talladega-Clay-Randolph-Bibb- Including the cities of Carrollton, Tuscaloosa, Columbiana, Pelham, Alabaster, Talladega, Sylacauga, Ashland, Roanoke, and Centreville 1110 PM CST Fri Dec 10 2021 ...WIND ADVISORY IN EFFECT UNTIL 1 PM CST SATURDAY... * WHAT...Southwest winds 10 to 20 mph with gusts up to 40 mph. * WHERE...Pickens, Tuscaloosa, Shelby, Talladega, Clay, Randolph and Bibb Counties. * WHEN...Through 1 PM CST Saturday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ ALZ011>015-017>021-024-026-111900- /O.CON.KBMX.WI.Y.0011.000000T0000Z-211211T1900Z/ Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun- Cherokee-Cleburne-Jefferson-St. Clair- Including the cities of Hamilton, Sulligent, Vernon, Fayette, Double Springs, Jasper, Oneonta, Gadsden, Anniston, Centre, Heflin, Birmingham, Hoover, Pell City, and Moody 1110 PM CST Fri Dec 10 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 1 PM CST SATURDAY... * WHAT...Southwest winds 15 to 20 mph with gusts up to 40 mph expected. * WHERE...Northern portions of central Alabama. * WHEN...Through 1 PM CST Saturday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 10, 3:21 PM CST | Special Weather Statement | BMX | Montgomery | 24 min |
| Dec 10, 3:49 PM CST | Special Weather Statement | BMX | Elmore | 26 min |
| Dec 10, 4:15 PM CST | Special Weather Statement | BMX | Elmore | 45 min |
Nearby
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.