Alert archive / Florida / Frost Advisories in 2021
Frost Advisory 7, NWS Jacksonville, FL
NWS Jacksonville, FL issued this frost advisory at Apr 2, 2021, 2:49 AM EDT for 11 counties in Florida; 8 counties in Georgia. It took effect at Apr 3, 2021, 4:00 AM EDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Apr 2, 2021, 2:49 AM EDT (06:49 UTC)
- In effect from
- Apr 3, 2021, 4:00 AM EDT
- Expired
- Apr 3, 2021, 9:00 AM EDT
- In force
- 5 hr
- Issued by
- NWS Jacksonville, FL
Counties Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Duval County, FL, Gilchrist County, FL, Marion County, FL, Nassau County, FL, Putnam County, FL, Suwannee County, FL, Union County, FL, Atkinson County, GA, Brantley County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Echols County, GA, Glynn County, GA, Ware County, GA
The radar
The Jacksonville radar (KJAX), 51 km from the middle of the area, began a volume at 06:55 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
Jacksonville, FL (KJAX), launched 00:00Z, 6.8 hours before the alert went out and 51 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
- 2756 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- -62 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
876 WWUS72 KJAX 020649 NPWJAX URGENT - WEATHER MESSAGE National Weather Service Jacksonville FL 249 AM EDT Fri Apr 2 2021 GAZ132>136-151-031300- /O.NEW.KJAX.FZ.W.0006.210403T0800Z-210403T1300Z/ Coffee-Jeff Davis-Bacon-Appling-Wayne-Pierce- Including the cities of Douglas, Hazlehurst, Alma, New Lacy, Baxley, Pine Grove, Plant Hatch, Doctortown, Gardi, Jesup, and Blackshear 249 AM EDT Fri Apr 2 2021 ...FREEZE WARNING IN EFFECT FROM 4 AM TO 9 AM EDT SATURDAY... * WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Coffee, Jeff Davis, Bacon, Appling, Wayne and Pierce Counties. * WHEN...From 4 AM to 9 AM EDT Saturday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Appropriate action should be taken to ensure tender vegetation and outdoor pets have adequate protection from the cold temperatures. Young children, the elderly and the homeless are especially vulnerable to the cold. Take measures to protect them. && $$ FLZ020-021-023-024-030-031-035-122-136-222-232-236-237-425-GAZ149- 152-153-162-163-165-250-264-350-364-031300- /O.NEW.KJAX.FR.Y.0007.210403T0800Z-210403T1300Z/ Hamilton-Suwannee-Baker-Inland Nassau-Union-Bradford-Gilchrist- Northern Columbia-Eastern Alachua-Southern Columbia-Western Clay- Western Alachua-Western Putnam-Western Duval-Atkinson-Brantley- Inland Glynn-Echols-Clinch-Inland Camden-Northern Ware- Northeastern Charlton-Southern Ware-Western Charlton- Including the cities of Jasper, Jennings, West Lake, Belmont, White Springs, Houston, Live Oak, McAlpin, Newburn, Suwannee Springs, Macclenny, Olustee, Ratliff, Hilliard, Kings Ferry, Bryceville, Lake Butler, Starke, New River, Trenton, Winfield, Suwannee Valley, Gainesville, Gainesville Airport, Newnans Lake, Columbia, Lake City, Oleno State Park, Lulu, Watertown, Doctors Inlet, Lakeside, Bellair, Middleburg, High Springs, Newberry, Archer, Carraway, Normandy, Axson, Pearson, Willacoochee, Atkinson, Hickox, Hortense, Nahunta, Raybon, Waynesville, Hoboken, Thalmann, Needmore, Statenville, Homerville, Colesburg, Tarboro, Waverly, Woodbine, Needham, Waycross, Winokur, Folkston, St. George, Homeland, Race Pond, and Stephen Foster State Park 249 AM EDT Fri Apr 2 2021 ...FROST ADVISORY IN EFFECT FROM 4 AM TO 9 AM EDT SATURDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of southeast Georgia and northeast and northern Florida. * WHEN...From 4 AM to 9 AM EDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
2 follow-up statements
360 WWUS72 KJAX 021955 NPWJAX URGENT - WEATHER MESSAGE National Weather Service Jacksonville FL 355 PM EDT Fri Apr 2 2021 GAZ149-152-250-031300- /O.UPG.KJAX.FR.Y.0007.210403T0800Z-210403T1300Z/ /O.EXA.KJAX.FZ.W.0006.210403T0800Z-210403T1300Z/ Atkinson-Brantley-Northern Ware- Including the cities of Axson, Pearson, Willacoochee, Atkinson, Hickox, Hortense, Nahunta, Raybon, Waynesville, Hoboken, Needham, and Waycross 355 PM EDT Fri Apr 2 2021 ...FREEZE WARNING IN EFFECT FROM 4 AM TO 9 AM EDT SATURDAY... * WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Atkinson, Brantley and Northern Ware Counties. * WHEN...From 4 AM to 9 AM EDT Saturday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Appropriate action should be taken to ensure tender vegetation and outdoor pets have adequate protection from the cold temperatures. Young children, the elderly and the homeless are especially vulnerable to the cold. Take measures to protect them. && $$ GAZ132>136-151-031300- /O.CON.KJAX.FZ.W.0006.210403T0800Z-210403T1300Z/ Coffee-Jeff Davis-Bacon-Appling-Wayne-Pierce- Including the cities of Douglas, Hazlehurst, Alma, New Lacy, Baxley, Pine Grove, Plant Hatch, Doctortown, Gardi, Jesup, and Blackshear 355 PM EDT Fri Apr 2 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 4 AM TO 9 AM EDT SATURDAY... * WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Coffee, Jeff Davis, Bacon, Appling, Wayne and Pierce Counties. * WHEN...From 4 AM to 9 AM EDT Saturday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Appropriate action should be taken to ensure tender vegetation and outdoor pets have adequate protection from the cold temperatures. Young children, the elderly and the homeless are especially vulnerable to the cold. Take measures to protect them. && $$ FLZ225-240-340-031300- /O.EXA.KJAX.FR.Y.0007.210403T0800Z-210403T1300Z/ Trout River-Central Marion-Western Marion- Including the cities of Anthony, Burbank, Ocala, Weirsdale, and Ocala Airport 355 PM EDT Fri Apr 2 2021 ...FROST ADVISORY IN EFFECT FROM 4 AM TO 9 AM EDT SATURDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Trout River, Central Marion and Western Marion Counties. * WHEN...From 4 AM to 9 AM EDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ FLZ020-021-023-024-030-031-035-122-136-222-232-236-237-425-GAZ153- 162-163-165-264-350-364-031300- /O.CON.KJAX.FR.Y.0007.210403T0800Z-210403T1300Z/ Hamilton-Suwannee-Baker-Inland Nassau-Union-Bradford-Gilchrist- Northern Columbia-Eastern Alachua-Southern Columbia-Western Clay- Western Alachua-Western Putnam-Western Duval-Inland Glynn-Echols- Clinch-Inland Camden-Northeastern Charlton-Southern Ware- Western Charlton- Including the cities of Jasper, Jennings, West Lake, Belmont, White Springs, Houston, Live Oak, McAlpin, Newburn, Suwannee Springs, Macclenny, Olustee, Ratliff, Hilliard, Kings Ferry, Bryceville, Lake Butler, Starke, New River, Trenton, Winfield, Suwannee Valley, Gainesville, Gainesville Airport, Newnans Lake, Columbia, Lake City, Oleno State Park, Lulu, Watertown, Doctors Inlet, Lakeside, Bellair, Middleburg, High Springs, Newberry, Archer, Carraway, Normandy, Thalmann, Needmore, Statenville, Homerville, Colesburg, Tarboro, Waverly, Woodbine, Winokur, Folkston, St. George, Homeland, Race Pond, and Stephen Foster State Park 355 PM EDT Fri Apr 2 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 4 AM TO 9 AM EDT SATURDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of southeast Georgia and northeast and northern Florida. * WHEN...From 4 AM to 9 AM EDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
912 WWUS72 KJAX 031300 NPWJAX URGENT - WEATHER MESSAGE National Weather Service Jacksonville FL 900 AM EDT Sat Apr 3 2021 GAZ132>136-149-151-152-250-031400- /O.EXP.KJAX.FZ.W.0006.000000T0000Z-210403T1300Z/ Coffee-Jeff Davis-Bacon-Appling-Wayne-Atkinson-Pierce-Brantley- Northern Ware- Including the cities of Douglas, Hazlehurst, Alma, New Lacy, Baxley, Pine Grove, Plant Hatch, Doctortown, Gardi, Jesup, Axson, Pearson, Willacoochee, Blackshear, Atkinson, Hickox, Hortense, Nahunta, Raybon, Waynesville, Hoboken, Needham, and Waycross 900 AM EDT Sat Apr 3 2021 ...FREEZE WARNING HAS EXPIRED... $$ FLZ020-021-023-024-030-031-035-122-136-222-225-232-236-237-240- 340-425-GAZ153-162-163-165-264-350-364-031400- /O.EXP.KJAX.FR.Y.0007.000000T0000Z-210403T1300Z/ Hamilton-Suwannee-Baker-Inland Nassau-Union-Bradford-Gilchrist- Northern Columbia-Eastern Alachua-Southern Columbia-Trout River- Western Clay-Western Alachua-Western Putnam-Central Marion- Western Marion-Western Duval-Inland Glynn-Echols-Clinch- Inland Camden-Northeastern Charlton-Southern Ware- Western Charlton- Including the cities of Jasper, Jennings, West Lake, Belmont, White Springs, Houston, Live Oak, McAlpin, Newburn, Suwannee Springs, Macclenny, Olustee, Ratliff, Hilliard, Kings Ferry, Bryceville, Lake Butler, Starke, New River, Trenton, Winfield, Suwannee Valley, Gainesville, Gainesville Airport, Newnans Lake, Columbia, Lake City, Oleno State Park, Lulu, Watertown, Doctors Inlet, Lakeside, Bellair, Middleburg, High Springs, Newberry, Archer, Carraway, Anthony, Burbank, Ocala, Weirsdale, Ocala Airport, Normandy, Thalmann, Needmore, Statenville, Homerville, Colesburg, Tarboro, Waverly, Woodbine, Winokur, Folkston, St. George, Homeland, Race Pond, and Stephen Foster State Park 900 AM EDT Sat Apr 3 2021 ...FROST ADVISORY HAS EXPIRED... $$
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 2, 2:46 AM EDT | Rip Current Statement | JAX | Duval, Flagler, Nassau | 41 hr |
| Apr 2, 2:49 AM EDT | Freeze Warning | JAX | Appling, Atkinson, Bacon, Brantley, Coffee, Jeff Davis and 3 more | 30 hr |
Nearby
Frost Advisories in Florida, 2021Frost Advisories in Georgia, 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.