Alert archive / Tennessee / Frost Advisories in 2021
Frost Advisory 3, NWS Nashville, TN
NWS Nashville, TN issued this frost advisory at Apr 21, 2021, 2:13 AM CDT for 17 counties in Tennessee. It took effect at Apr 21, 2021, 11:00 PM CDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Apr 21, 2021, 2:13 AM CDT (07:13 UTC)
- In effect from
- Apr 21, 2021, 11:00 PM CDT
- Expired
- Apr 22, 2021, 8:00 AM CDT
- In force
- 9 hr
- Issued by
- NWS Nashville, TN
Counties Cheatham County, TN, Davidson County, TN, Dickson County, TN, Giles County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Stewart County, TN, Wayne County, TN, Williamson County, TN
The radar
The Nashville radar (KOHX), 80 km from the middle of the area, began a volume at 07:14 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
Nashville Metro, TN (KBNA), launched 00:00Z, 7.2 hours before the alert went out and 71 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
- 8 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 2754 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
870 WWUS74 KOHX 210713 NPWOHX URGENT - WEATHER MESSAGE National Weather Service Nashville TN 213 AM CDT Wed Apr 21 2021 TNZ008>011-028>034-062>066-075-077>080-221300- /O.UPG.KOHX.FZ.A.0001.210422T0500Z-210422T1300Z/ /O.NEW.KOHX.FZ.W.0003.210422T0400Z-210422T1300Z/ Sumner-Macon-Clay-Pickett-Wilson-Trousdale-Smith-Jackson-Putnam- Overton-Fentress-Rutherford-Cannon-De Kalb-White-Cumberland- Bedford-Coffee-Warren-Grundy-Van Buren- Including the cities of Hendersonville, Gallatin, Goodlettsville, Lafayette, Celina, Byrdstown, Lebanon, Mount Juliet, Hartsville, Carthage, South Carthage, Gordonsville, Gainesboro, Cookeville, Livingston, Jamestown, Allardt, Murfreesboro, Smyrna, La Vergne, Woodbury, Smithville, Sparta, Crossville, Shelbyville, Tullahoma, Manchester, McMinnville, Altamont, Coalmont, and Spencer 213 AM CDT Wed Apr 21 2021 ...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 8 AM CDT THURSDAY... * WHAT...Sub-freezing temperatures in the low 30s expected, with upper 20s possible on the Cumberland Plateau. * WHERE...Eastern half of Middle Tennessee. * WHEN...From 11 PM this evening to 8 AM CDT Thursday. * 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. && $$ TNZ005>007-023>027-056>061-093>095-221300- /O.NEW.KOHX.FR.Y.0003.210422T0400Z-210422T1300Z/ Stewart-Montgomery-Robertson-Houston-Humphreys-Dickson-Cheatham- Davidson-Perry-Hickman-Lewis-Williamson-Maury-Marshall-Wayne- Lawrence-Giles- Including the cities of Dover, Clarksville, Springfield, Erin, Tennessee Ridge, Waverly, New Johnsonville, McEwen, Dickson, Ashland City, Kingston Springs, Nashville, Linden, Lobelville, Centerville, Hohenwald, Franklin, Brentwood, Columbia, Lewisburg, Clifton, Waynesboro, Lawrenceburg, and Pulaski 213 AM CDT Wed Apr 21 2021 ...FROST ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 8 AM CDT THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Western half of Middle Tennessee. * WHEN...From 11 PM this evening to 8 AM CDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
2 follow-up statements
842 WWUS74 KOHX 220720 NPWOHX URGENT - WEATHER MESSAGE National Weather Service Nashville TN 220 AM CDT Thu Apr 22 2021 TNZ009>011-029>034-063>066-077>080-221315- /O.NEW.KOHX.FR.Y.0004.210423T0500Z-210423T1200Z/ /O.CON.KOHX.FZ.W.0003.000000T0000Z-210422T1300Z/ Macon-Clay-Pickett-Trousdale-Smith-Jackson-Putnam-Overton- Fentress-Cannon-De Kalb-White-Cumberland-Coffee-Warren-Grundy- Van Buren- Including the cities of Lafayette, Celina, Byrdstown, Hartsville, Carthage, South Carthage, Gordonsville, Gainesboro, Cookeville, Livingston, Jamestown, Allardt, Woodbury, Smithville, Sparta, Crossville, Tullahoma, Manchester, McMinnville, Altamont, Coalmont, and Spencer 220 AM CDT Thu Apr 22 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 7 AM CDT FRIDAY... * WHAT...For the Freeze Warning, sub-freezing temperatures as low as 28. For the Frost Advisory, temperatures as low as 34 will result in frost formation. * WHERE...Eastern half of Middle Tennessee. * WHEN...For the Freeze Warning, until 8 AM CDT this morning. For the Frost Advisory, from midnight tonight to 7 AM CDT Friday. * 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. && $$ TNZ008-028-062-075-221300- /O.CON.KOHX.FZ.W.0003.000000T0000Z-210422T1300Z/ Sumner-Wilson-Rutherford-Bedford- Including the cities of Hendersonville, Gallatin, Goodlettsville, Lebanon, Mount Juliet, Murfreesboro, Smyrna, La Vergne, and Shelbyville 220 AM CDT Thu Apr 22 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... * WHAT...Sub-freezing temperatures in the low 30s expected, with upper 20s possible on the Cumberland Plateau. * WHERE...Eastern half of Middle Tennessee. * WHEN...Until 8 AM CDT today. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ TNZ005>007-023>027-056>061-093>095-221300- /O.CON.KOHX.FR.Y.0003.000000T0000Z-210422T1300Z/ Stewart-Montgomery-Robertson-Houston-Humphreys-Dickson-Cheatham- Davidson-Perry-Hickman-Lewis-Williamson-Maury-Marshall-Wayne- Lawrence-Giles- Including the cities of Dover, Clarksville, Springfield, Erin, Tennessee Ridge, Waverly, New Johnsonville, McEwen, Dickson, Ashland City, Kingston Springs, Nashville, Linden, Lobelville, Centerville, Hohenwald, Franklin, Brentwood, Columbia, Lewisburg, Clifton, Waynesboro, Lawrenceburg, and Pulaski 220 AM CDT Thu Apr 22 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Western half of Middle Tennessee. * WHEN...Until 8 AM CDT today. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
687 WWUS74 KOHX 221310 NPWOHX URGENT - WEATHER MESSAGE National Weather Service Nashville TN 810 AM CDT Thu Apr 22 2021 TNZ009>011-029>034-063>066-077>080-222000- /O.EXP.KOHX.FZ.W.0003.000000T0000Z-210422T1300Z/ /O.CON.KOHX.FR.Y.0004.210423T0500Z-210423T1200Z/ Macon-Clay-Pickett-Trousdale-Smith-Jackson-Putnam-Overton- Fentress-Cannon-De Kalb-White-Cumberland-Coffee-Warren-Grundy- Van Buren- Including the cities of Lafayette, Celina, Byrdstown, Hartsville, Carthage, South Carthage, Gordonsville, Gainesboro, Cookeville, Livingston, Jamestown, Allardt, Woodbury, Smithville, Sparta, Crossville, Tullahoma, Manchester, McMinnville, Altamont, Coalmont, and Spencer 810 AM CDT Thu Apr 22 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 7 AM CDT FRIDAY... ...FREEZE WARNING HAS EXPIRED... * WHAT...Temperatures as low as 36 will result in frost formation. * WHERE...Eastern Portion of Middle Tennessee just west of and across Cumberland Plateau Region. * WHEN...For Frost Advisory, midnight tonight to 7 AM CDT Friday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ TNZ008-028-062-075-221415- /O.EXP.KOHX.FZ.W.0003.000000T0000Z-210422T1300Z/ Sumner-Wilson-Rutherford-Bedford- Including the cities of Hendersonville, Gallatin, Goodlettsville, Lebanon, Mount Juliet, Murfreesboro, Smyrna, La Vergne, and Shelbyville 810 AM CDT Thu Apr 22 2021 ...FREEZE WARNING HAS EXPIRED... The freeze warning for these locations has expired. $$ TNZ005>007-023>027-056>061-093>095-221415- /O.EXP.KOHX.FR.Y.0003.000000T0000Z-210422T1300Z/ Stewart-Montgomery-Robertson-Houston-Humphreys-Dickson-Cheatham- Davidson-Perry-Hickman-Lewis-Williamson-Maury-Marshall-Wayne- Lawrence-Giles- Including the cities of Dover, Clarksville, Springfield, Erin, Tennessee Ridge, Waverly, New Johnsonville, McEwen, Dickson, Ashland City, Kingston Springs, Nashville, Linden, Lobelville, Centerville, Hohenwald, Franklin, Brentwood, Columbia, Lewisburg, Clifton, Waynesboro, Lawrenceburg, and Pulaski 810 AM CDT Thu Apr 22 2021 ...FROST ADVISORY HAS EXPIRED... The frost advisory for these locations has expired. $$ JB Wright
The office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 2:13 AM CDT | Freeze Warning | OHX | Bedford, Cannon, Clay, Coffee, Cumberland, DeKalb and 15 more | 30 hr |
Nearby
Frost Advisories in Tennessee, 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.