Alert archive / Alabama / Hard Freeze Warnings in 2021
Hard Freeze Warning 1, NWS Mobile, AL
NWS Mobile, AL issued this hard freeze warning at Feb 14, 2021, 8:52 PM CST for 11 counties in Alabama; 5 counties in Mississippi; Escambia County, Santa Rosa County, Florida. It took effect at Feb 15, 2021, 8:00 PM CST. It was in force for 13 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 14, 2021, 8:52 PM CST (02:52 UTC)
- In effect from
- Feb 15, 2021, 8:00 PM CST
- Expired
- Feb 16, 2021, 9:00 AM CST
- In force
- 13 hr
- Issued by
- NWS Mobile, AL
Counties Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Crenshaw County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Santa Rosa County, FL, George County, MS, Greene County, MS, Perry County, MS, Stone County, MS, Wayne County, MS
The radar
The Mobile radar (KMOB), 78 km from the middle of the area, began a volume at 02:53 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
Slidell Radar S, LA (KSIL), launched 00:00Z, 2.9 hours before the alert went out and 214 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
- 578 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 198 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
299 WWUS74 KMOB 150252 NPWMOB URGENT - WEATHER MESSAGE National Weather Service Mobile AL 852 PM CST Sun Feb 14 2021 ALZ051>054-261-263-MSZ067-075-076-078-079-151200- /O.UPG.KMOB.HZ.A.0001.210216T0400Z-210216T1500Z/ /O.NEW.KMOB.HZ.W.0001.210216T0400Z-210216T1500Z/ Choctaw-Washington-Clarke-Wilcox-Mobile Inland-Mobile Central- Wayne-Perry-Greene-Stone-George- Including the cities of Butler, Lisman, Silas, Chatom, Millry, Grove Hill, Jackson, Thomasville, Camden, Pine Hill, Citronelle, Saraland, Mobile, Prichard, Theodore, Waynesboro, Beaumont, New Augusta, Richton, Leakesville, McLain, Wiggins, and Lucedale 852 PM CST Sun Feb 14 2021 ...HARD FREEZE WARNING IN EFFECT FROM 10 PM MONDAY TO 9 AM CST TUESDAY... * WHAT...Sub-freezing temperatures as low as 15 expected. * WHERE...Portions of south central and southwest Alabama and southeast Mississippi. * WHEN...From 10 PM Monday to 9 AM CST Tuesday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Temperatures will quickly drop into the teens Monday night for the watch area. Given the rain during the day, flash freezing will also be possible on elevated surfaces and roadways that are still wet. This could lead to serious black ice issues late Monday night into early Tuesday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$
3 follow-up statements
951 WWUS74 KMOB 150941 NPWMOB URGENT - WEATHER MESSAGE National Weather Service Mobile AL 341 AM CST Mon Feb 15 2021 ALZ055-262-151745- /O.EXA.KMOB.HZ.W.0001.210216T0400Z-210216T1500Z/ Monroe-Baldwin Inland- Including the cities of Homewood, Monroeville, and Stockton 341 AM CST Mon Feb 15 2021 ...HARD FREEZE WARNING IN EFFECT FROM 10 PM THIS EVENING TO 9 AM CST TUESDAY... * WHAT...Sub-freezing temperatures as low as 18 expected. * WHERE...Monroe and Baldwin Inland Counties. * WHEN...From 10 PM this evening to 9 AM CST Tuesday. * IMPACTS...Freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Unprotected pipes can freeze and burst. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Hard Freeze Warning means temperatures of 20 degrees or lower are expected for several hours. These temperatures can cause exposed water pipes to burst. If you have any exterior open air piping, ensure the pipes are adequately covered and open the faucet slightly for a small stream of water overnight. Check on elderly neighbors to make sure they have adequate heat. Area shelters should continue to expect increased demand. Outdoor pets and livestock should also have adequate warmth. Take adequate safety precautions with heating systems, and make sure to utilize carbon monoxide detectors in enclosed spaces. Ensure space heaters are not left unattended and are not used near flammable materials such as curtains or bed coverings. Space heaters account for one out of every three home heating fires and four out of five home heating fire deaths. && $$ ALZ051>054-261-263-MSZ067-075-076-078-079-151745- /O.CON.KMOB.HZ.W.0001.210216T0400Z-210216T1500Z/ Choctaw-Washington-Clarke-Wilcox-Mobile Inland-Mobile Central- Wayne-Perry-Greene-Stone-George- Including the cities of Butler, Lisman, Silas, Chatom, Millry, Grove Hill, Jackson, Thomasville, Camden, Pine Hill, Citronelle, Saraland, Mobile, Prichard, Theodore, Waynesboro, Beaumont, New Augusta, Richton, Leakesville, McLain, Wiggins, and Lucedale 341 AM CST Mon Feb 15 2021 ...HARD FREEZE WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 9 AM CST TUESDAY... * WHAT...Sub-freezing temperatures as low as 15 expected. * WHERE...Portions of south central and southwest Alabama and southeast Mississippi. * WHEN...From 10 PM this evening to 9 AM CST Tuesday. * IMPACTS...Freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Unprotected pipes can freeze and burst. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Hard Freeze Warning means temperatures of 20 degrees or lower are expected for several hours. These temperatures can cause exposed water pipes to burst. If you have any exterior open air piping, ensure the pipes are adequately covered and open the faucet slightly for a small stream of water overnight. Check on elderly neighbors to make sure they have adequate heat. Area shelters should continue to expect increased demand. Outdoor pets and livestock should also have adequate warmth. Take adequate safety precautions with heating systems, and make sure to utilize carbon monoxide detectors in enclosed spaces. Ensure space heaters are not left unattended and are not used near flammable materials such as curtains or bed coverings. Space heaters account for one out of every three home heating fires and four out of five home heating fire deaths. && $$
037 WWUS74 KMOB 152028 NPWMOB URGENT - WEATHER MESSAGE National Weather Service Mobile AL 228 PM CST Mon Feb 15 2021 ALZ056>059-264-FLZ201-203-160430- /O.EXB.KMOB.HZ.W.0001.210216T0200Z-210216T1500Z/ Conecuh-Butler-Crenshaw-Escambia-Baldwin Central-Escambia Inland- Santa Rosa Inland- Including the cities of Evergreen, Greenville, Brantley, Luverne, Atmore, Brewton, Flomaton, Bay Minette, Daphne, Fairhope, Foley, Spanish Fort, Century, Molino, Walnut Hill, Jay, and Milton 228 PM CST Mon Feb 15 2021 ...HARD FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 9 AM CST TUESDAY... * WHAT...Sub-freezing temperatures as low as 15 to 20 degrees. * WHERE...In Alabama, Conecuh, Butler, Crenshaw, Escambia and Baldwin Central Counties. In Florida, Escambia Inland and Santa Rosa Inland Counties. * WHEN...From 8 PM this evening to 9 AM CST Tuesday. * IMPACTS...Freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Unprotected pipes can freeze and burst. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ ALZ051>055-261>263-MSZ067-075-076-078-079-160430- /O.EXT.KMOB.HZ.W.0001.210216T0200Z-210216T1500Z/ Choctaw-Washington-Clarke-Wilcox-Monroe-Mobile Inland- Baldwin Inland-Mobile Central-Wayne-Perry-Greene-Stone-George- Including the cities of Butler, Lisman, Silas, Chatom, Millry, Grove Hill, Jackson, Thomasville, Camden, Pine Hill, Homewood, Monroeville, Citronelle, Saraland, Stockton, Mobile, Prichard, Theodore, Waynesboro, Beaumont, New Augusta, Richton, Leakesville, McLain, Wiggins, and Lucedale 228 PM CST Mon Feb 15 2021 ...HARD FREEZE WARNING NOW IN EFFECT FROM 8 PM THIS EVENING TO 9 AM CST TUESDAY... * WHAT...Sub-freezing temperatures as low as 12 to 18 degrees expected. * WHERE...Portions of south central and southwest Alabama and southeast Mississippi. * WHEN...From 8 PM this evening to 9 AM CST Tuesday. * IMPACTS...Freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Unprotected pipes can freeze and burst. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$
291 WWUS74 KMOB 160253 NPWMOB URGENT - WEATHER MESSAGE National Weather Service Mobile AL 853 PM CST Mon Feb 15 2021 ALZ051>059-261>264-FLZ201-203-MSZ067-075-076-078-079-161500- /O.CON.KMOB.HZ.W.0001.000000T0000Z-210216T1500Z/ Choctaw-Washington-Clarke-Wilcox-Monroe-Conecuh-Butler-Crenshaw- Escambia-Mobile Inland-Baldwin Inland-Mobile Central- Baldwin Central-Escambia Inland-Santa Rosa Inland-Wayne-Perry- Greene-Stone-George- Including the cities of Butler, Lisman, Silas, Chatom, Millry, Grove Hill, Jackson, Thomasville, Camden, Pine Hill, Homewood, Monroeville, Evergreen, Greenville, Brantley, Luverne, Atmore, Brewton, Flomaton, Citronelle, Saraland, Stockton, Mobile, Prichard, Theodore, Bay Minette, Daphne, Fairhope, Foley, Spanish Fort, Century, Molino, Walnut Hill, Jay, Milton, Waynesboro, Beaumont, New Augusta, Richton, Leakesville, McLain, Wiggins, and Lucedale 853 PM CST Mon Feb 15 2021 ...HARD FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CST TUESDAY... * WHAT...Sub-freezing temperatures as low as 12 to 20 degrees. * WHERE...Portions of south central and southwest Alabama, northwest Florida and southeast Mississippi. * WHEN...Until 9 AM CST Tuesday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 14, 9:07 PM CST | Wind Chill Advisory | MOB | Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more | 36 hr |
| Feb 15, 7:24 AM CST | Marine Dense Fog Advisory | MOB | 8 hr | |
| Feb 15, 10:30 AM CST | Special Marine Warning | MOB | 90 min | |
| Feb 15, 11:40 AM CST | Special Marine Warning | MOB | 65 min | |
| Feb 15, 12:39 PM CST | Special Marine Warning | MOB | 66 min | |
| Feb 15, 12:53 PM CST | Special Weather Statement | MOB | Butler | 52 min |
| Feb 15, 1:37 PM CST | Special Weather Statement | MOB | Covington | 23 min |
| Feb 15, 12:41 PM CST | Special Weather Statement | MOB | Okaloosa | 49 min |
| Feb 15, 12:55 PM CST | Severe Thunderstorm Warning | MOB | Okaloosa | 36 min |
Nearby
Hard Freeze Warnings in Alabama, 2021Hard Freeze Warnings in Mississippi, 2021Hard Freeze Warnings in Florida, 2021Every hard freeze warning 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.