Alert archive / Alabama / Frost Advisories in 2021
Frost Advisory 3, NWS Birmingham, AL
NWS Birmingham, AL issued this frost advisory at Nov 6, 2021, 12:36 PM CDT for 39 counties in Alabama. It took effect at Nov 7, 2021, 3:00 AM CST. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Nov 6, 2021, 12:36 PM CDT (17:36 UTC)
- In effect from
- Nov 7, 2021, 3:00 AM CST
- Expired
- Nov 7, 2021, 7:00 AM CST
- In force
- 4 hr
- Issued by
- NWS Birmingham, AL
All 39 counties
Autauga County, AL, Barbour County, AL, Bibb County, AL, Blount County, AL, Bullock County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Etowah 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, Marion 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, Winston County, AL
The radar
The Birmingham radar (KBMX), 22 km from the middle of the area, began a volume at 17:36 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, 5.6 hours before the alert went out and 23 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1987 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
832 WWUS74 KBMX 061736 NPWBMX URGENT - WEATHER MESSAGE National Weather Service Birmingham AL 1236 PM CDT Sat Nov 6 2021 ALZ011>015-017>021-024>029-070400- /O.NEW.KBMX.FR.Y.0003.211107T0900Z-211107T1200Z/ Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun- Cherokee-Cleburne-Jefferson-Shelby-St. Clair-Talladega-Clay- Randolph- Including the cities of Hamilton, Sulligent, Vernon, Fayette, Double Springs, Jasper, Oneonta, Gadsden, Anniston, Centre, Heflin, Birmingham, Hoover, Columbiana, Pelham, Alabaster, Pell City, Moody, Talladega, Sylacauga, Ashland, and Roanoke 1236 PM CDT Sat Nov 6 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 6 AM CST SUNDAY... * WHAT...Temperatures in the low to mid 30s will result in frost formation. * WHERE...Northern portions of Central Alabama. * WHEN...From 3 AM to 6 AM CST Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
2 follow-up statements
004 WWUS74 KBMX 062238 NPWBMX URGENT - WEATHER MESSAGE National Weather Service Birmingham AL 538 PM CDT Sat Nov 6 2021 ALZ022-023-030>046-049-071300- /O.EXB.KBMX.FR.Y.0003.211107T0900Z-211107T1300Z/ Pickens-Tuscaloosa-Sumter-Greene-Hale-Perry-Bibb-Chilton-Coosa- Tallapoosa-Chambers-Marengo-Dallas-Autauga-Lowndes-Elmore- Montgomery-Macon-Bullock-Pike- Including the cities of Carrollton, Tuscaloosa, Livingston, Eutaw, Greensboro, Moundville, Marion, Centreville, Clanton, Rockford, Alexander City, Dadeville, Valley, Lanett, Lafayette, Demopolis, Linden, Selma, Prattville, Fort Deposit, Hayneville, Wetumpka, Tallassee, Montgomery, Tuskegee, Union Springs, and Troy 538 PM CDT Sat Nov 6 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 7 AM CST SUNDAY... * WHAT...Temperatures as low as 35 will result in frost formation. * WHERE...Most of the southern half of Central Alabama. * WHEN...From 3 AM to 7 AM CST Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ ALZ011>015-017>021-024>029-071300- /O.EXT.KBMX.FR.Y.0003.211107T0900Z-211107T1300Z/ Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun- Cherokee-Cleburne-Jefferson-Shelby-St. Clair-Talladega-Clay- Randolph- Including the cities of Hamilton, Sulligent, Vernon, Fayette, Double Springs, Jasper, Oneonta, Gadsden, Anniston, Centre, Heflin, Birmingham, Hoover, Columbiana, Pelham, Alabaster, Pell City, Moody, Talladega, Sylacauga, Ashland, and Roanoke 538 PM CDT Sat Nov 6 2021 ...FROST ADVISORY NOW IN EFFECT FROM 3 AM TO 7 AM CST SUNDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Northern half of Central Alabama. * WHEN...From 3 AM to 7 AM CST Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
212 WWUS74 KBMX 070643 NPWBMX URGENT - WEATHER MESSAGE National Weather Service Birmingham AL 143 AM CDT Sun Nov 7 2021 ALZ047-048-050-071300- /O.EXA.KBMX.FR.Y.0003.211107T0900Z-211107T1300Z/ Lee-Russell-Barbour- Including the cities of Auburn, Opelika, Phenix City, and Eufaula 143 AM CDT Sun Nov 7 2021 ...FROST ADVISORY IN EFFECT UNTIL 7 AM CST THIS MORNING... * WHAT...Temperatures 34 to 38 degrees will result in frost formation. * WHERE...Lee, Russell and Barbour Counties. * WHEN...From 3 AM to 7 AM CST Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ ALZ011>015-017>046-049-071300- /O.CON.KBMX.FR.Y.0003.211107T0900Z-211107T1300Z/ Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun- Cherokee-Cleburne-Pickens-Tuscaloosa-Jefferson-Shelby-St. Clair- Talladega-Clay-Randolph-Sumter-Greene-Hale-Perry-Bibb-Chilton- Coosa-Tallapoosa-Chambers-Marengo-Dallas-Autauga-Lowndes-Elmore- Montgomery-Macon-Bullock-Pike- Including the cities of Hamilton, Sulligent, Vernon, Fayette, Double Springs, Jasper, Oneonta, Gadsden, Anniston, Centre, Heflin, Carrollton, Tuscaloosa, Birmingham, Hoover, Columbiana, Pelham, Alabaster, Pell City, Moody, Talladega, Sylacauga, Ashland, Roanoke, Livingston, Eutaw, Greensboro, Moundville, Marion, Centreville, Clanton, Rockford, Alexander City, Dadeville, Valley, Lanett, Lafayette, Demopolis, Linden, Selma, Prattville, Fort Deposit, Hayneville, Wetumpka, Tallassee, Montgomery, Tuskegee, Union Springs, and Troy 143 AM CDT Sun Nov 7 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 7 AM CST THIS MORNING... * WHAT...Temperatures 32 to 36 degrees will result in frost formation. * WHERE...All of Central Alabama. * WHEN...From 3 AM to 7 AM CST Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
Nearby
Frost Advisories in Alabama, 2021Every frost 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.