Alert archive / Tennessee / Frost Advisories in 2021

Frost Advisory 3, NWS Morristown, TN

April 21, 20218 counties in Tennessee

NWS Morristown, TN issued this frost advisory at Apr 21, 2021, 3:04 AM EDT for 8 counties in Tennessee. It took effect at Apr 22, 2021, 12:00 AM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Apr 21, 2021, 3:04 AM EDT (07:04 UTC)
In effect from
Apr 22, 2021, 12:00 AM EDT
Expired
Apr 22, 2021, 9:00 AM EDT
In force
9 hr
Issued by
NWS Morristown, TN

Counties Bradley County, TN, Hamilton County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Polk County, TN, Rhea County, TN

The radar

The Northeast Alabama radar (KHTX), 121 km from the middle of the area, began a volume at 07:06 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, 7.1 hours before the alert went out and 182 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.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2021-04-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 8 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2021-04-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

The text

As transmitted.

713 
WWUS74 KMRX 210704
NPWMRX

URGENT - WEATHER MESSAGE
National Weather Service Morristown TN
304 AM EDT Wed Apr 21 2021

NCZ060-061-TNZ012>018-035-041>047-072-074-081-082-087-VAZ001-002-
005-006-008-211515-
/O.UPG.KMRX.FZ.A.0002.210422T0400Z-210422T1300Z/
/O.NEW.KMRX.FZ.W.0004.210422T0400Z-210422T1300Z/
Cherokee-Clay-Scott-Campbell-Claiborne-Hancock-Hawkins-Sullivan-
Johnson-Morgan-Cocke Smoky Mountains-Northwest Greene-
Southeast Greene-Washington-Unicoi-Northwest Carter-
Southeast Carter-Blount Smoky Mountains-Sevier Smoky Mountains-
Sequatchie-Bledsoe-Southeast Monroe-Lee-Wise-Russell-
Including the cities of Andrews, Marble, Topton, Hiawasse Dam, 
Murphy, Unaka, Violet, Shooting Creek, Brasstown, Hayesville, 
Tusquitee, Big South Fork National, Oneida, Smokey Junction, 
Elgin, Huntsville, Norma, Slick Rock, Fincastle, La Follette, 
Elk Valley, Jellico, White Oak, Caryville, Royal Blue, 
Lone Mountain, Sandlick, Springdale, Arthur, Harrogate-Shawanee, 
Clairfield, Howard Quarter, Evanston, Sneedville, Treadway, 
Kyles Ford, Mooresburg, Kingsport, Bristol TN, South Holston Dam,
Doeville, Mountain City, Neva, Shady Valley, Trade, 
Laurel Bloomery, Pine Orchard, High Point, Petros, Hartford, 
Greeneville, Cedar Creek, Johnson City, Erwin, Unicoi, 
Limestone Cove, Elizabethton, Hampton, Cades Cove, Elkmont, 
Gatlinburg, Cagle, Dunlap, Cartwright, Lone Oak, Old Cumberland, 
Palio, Melvine, Mount Crest, Pikeville, Brayton, Citico, 
Coker Creek, Rose Hill, Big Stone Gap, Norton, Wise, Coeburn, 
Appalachia, Pardee, Hiltons, Hansonville, Lebanon, Dye, 
Castlewood, Honaker, Rosedale, Benhams, Bristol VA, and Abingdon
304 AM EDT Wed Apr 21 2021 /204 AM CDT Wed Apr 21 2021/

...FREEZE WARNING IN EFFECT FROM MIDNIGHT EDT /11 PM CDT/ TONIGHT
TO 9 AM EDT /8 AM CDT/ THURSDAY...

* WHAT...Sub-freezing temperatures as low as 28 expected.

* WHERE...Portions of east Tennessee, southwest Virginia and 
  southwest North Carolina.

* WHEN...From midnight EDT /11 PM CDT/ tonight to 9 AM EDT /8 AM 
  CDT/ Thursday.

* IMPACTS...Frost and freeze conditions could kill crops and other
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. Those that
have in-ground sprinkler systems should drain them and cover
above-ground pipes to protect them from freezing.

&&

$$

TNZ036>040-067>071-073-211515-
/O.NEW.KMRX.FZ.W.0004.210422T0400Z-210422T1300Z/
Anderson-Union-Grainger-Hamblen-Northwest Cocke-Roane-Loudon-Knox-
Jefferson-Northwest Blount-North Sevier-
Including the cities of Oak Ridge, Clinton, Maynardville, 
Norris Lake, Paulette, Rose Hill, Sharps Chapel, Luttrell, 
Bean Station, Alpha, Morristown, Russellville, Bybee, Newport, 
Harriman, Eagle Furnace, Rockwood, Bradbury, Fairview, Kingston, 
Oliver Springs, Lenoir City, Loudon, Bearden, Knoxville, 
Lake Forest, Jefferson City, Strawberry Plains, Chestnut Hill, 
Dandridge, White Pine, Happy Valley, Maryville, Alcoa, 
Harrisburg, Kodak, McMahan, Sevierville, Seymour, 
and Pigeon Forge
304 AM EDT Wed Apr 21 2021

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT
THURSDAY...

* WHAT...Sub-freezing temperatures as low as 31 expected.

* WHERE...Portions of east Tennessee.

* WHEN...From midnight tonight to 9 AM EDT Thursday.

* IMPACTS...Frost and freeze conditions could kill crops and other
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. Those that
have in-ground sprinkler systems should drain them and cover
above-ground pipes to protect them from freezing.

&&

$$

TNZ083>086-098>102-211515-
/O.NEW.KMRX.FR.Y.0003.210422T0400Z-210422T1300Z/
Rhea-Meigs-McMinn-Northwest Monroe-Marion-Hamilton-Bradley-
West Polk-East Polk-
Including the cities of Dayton, Evensville, Old Washington, 
Grandview, Spring City, Big Spring, Athens, Clear Water, 
Dentville, Etowah, Sweetwater, Madisonville, Bullet Creek, 
South Pittsburg, Haletown (Guild), Jasper, Martin Springs, 
Whitwell, Powells Crossroads, Monteagle, Chattanooga, Cleveland, 
Tasso, Conasauga, Archville, Benton, Parksville, Reliance, 
Big Frog Mountain, Ducktown, and Turtletown
304 AM EDT Wed Apr 21 2021 /204 AM CDT Wed Apr 21 2021/

...FROST ADVISORY IN EFFECT FROM MIDNIGHT EDT /11 PM CDT/ TONIGHT
TO 9 AM EDT /8 AM CDT/ THURSDAY...

* WHAT...Temperatures as low as 33 will result in frost 
  formation.

* WHERE...Portions of east Tennessee.

* WHEN...From midnight EDT /11 PM CDT/ tonight to 9 AM EDT /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.

&&

$$
4 follow-up statements
204 
WWUS74 KMRX 211441
NPWMRX

URGENT - WEATHER MESSAGE
National Weather Service Morristown TN
1041 AM EDT Wed Apr 21 2021

NCZ060-061-TNZ012>018-035>047-067>074-081-082-087-VAZ001-002-005-
006-008-220400-
/O.CON.KMRX.FZ.W.0004.210422T0400Z-210422T1300Z/
Cherokee-Clay-Scott-Campbell-Claiborne-Hancock-Hawkins-Sullivan-
Johnson-Morgan-Anderson-Union-Grainger-Hamblen-Northwest Cocke-
Cocke Smoky Mountains-Northwest Greene-Southeast Greene-
Washington-Unicoi-Northwest Carter-Southeast Carter-Roane-Loudon-
Knox-Jefferson-Northwest Blount-Blount Smoky Mountains-
North Sevier-Sevier Smoky Mountains-Sequatchie-Bledsoe-
Southeast Monroe-Lee-Wise-Russell-
Including the cities of Andrews, Marble, Topton, Hiawasse Dam, 
Murphy, Unaka, Violet, Shooting Creek, Brasstown, Hayesville, 
Tusquitee, Big South Fork National, Oneida, Smokey Junction, 
Elgin, Huntsville, Norma, Slick Rock, Fincastle, La Follette, 
Elk Valley, Jellico, White Oak, Caryville, Royal Blue, 
Lone Mountain, Sandlick, Springdale, Arthur, Harrogate-Shawanee, 
Clairfield, Howard Quarter, Evanston, Sneedville, Treadway, 
Kyles Ford, Mooresburg, Kingsport, Bristol TN, South Holston Dam,
Doeville, Mountain City, Neva, Shady Valley, Trade, 
Laurel Bloomery, Pine Orchard, High Point, Petros, Oak Ridge, 
Clinton, Maynardville, Norris Lake, Paulette, Rose Hill, 
Sharps Chapel, Luttrell, Bean Station, Alpha, Morristown, 
Russellville, Bybee, Newport, Hartford, Greeneville, Cedar Creek,
Johnson City, Erwin, Unicoi, Limestone Cove, Elizabethton, 
Hampton, Harriman, Eagle Furnace, Rockwood, Bradbury, Fairview, 
Kingston, Oliver Springs, Lenoir City, Loudon, Bearden, 
Knoxville, Lake Forest, Jefferson City, Strawberry Plains, 
Chestnut Hill, Dandridge, White Pine, Happy Valley, Maryville, 
Alcoa, Cades Cove, Harrisburg, Kodak, McMahan, Sevierville, 
Seymour, Pigeon Forge, Elkmont, Gatlinburg, Cagle, Dunlap, 
Cartwright, Lone Oak, Old Cumberland, Palio, Melvine, 
Mount Crest, Pikeville, Brayton, Citico, Coker Creek, 
Big Stone Gap, Norton, Wise, Coeburn, Appalachia, Pardee, 
Hiltons, Hansonville, Lebanon, Dye, Castlewood, Honaker, 
Rosedale, Benhams, Bristol VA, and Abingdon
1041 AM EDT Wed Apr 21 2021 /941 AM CDT Wed Apr 21 2021/

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT EDT /11 PM CDT/
TONIGHT TO 9 AM EDT /8 AM CDT/ THURSDAY...

* WHAT...Sub-freezing temperatures as low as 28 expected.

* WHERE...Portions of east Tennessee, southwest Virginia and 
  southwest North Carolina.

* WHEN...From midnight EDT /11 PM CDT/ tonight to 9 AM EDT /8 AM 
  CDT/ Thursday.

* IMPACTS...Frost and freeze conditions could kill crops and 
  other sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. Those that
have in-ground sprinkler systems should drain them and cover
above-ground pipes to protect them from freezing.

&&

$$

TNZ083>086-098>102-220400-
/O.CON.KMRX.FR.Y.0003.210422T0400Z-210422T1300Z/
Rhea-Meigs-McMinn-Northwest Monroe-Marion-Hamilton-Bradley-
West Polk-East Polk-
Including the cities of Dayton, Evensville, Old Washington, 
Grandview, Spring City, Big Spring, Athens, Clear Water, 
Dentville, Etowah, Sweetwater, Madisonville, Bullet Creek, 
South Pittsburg, Haletown (Guild), Jasper, Martin Springs, 
Whitwell, Powells Crossroads, Monteagle, Chattanooga, Cleveland, 
Tasso, Conasauga, Archville, Benton, Parksville, Reliance, 
Big Frog Mountain, Ducktown, and Turtletown
1041 AM EDT Wed Apr 21 2021 /941 AM CDT Wed Apr 21 2021/

...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT EDT /11 PM CDT/
TONIGHT TO 9 AM EDT /8 AM CDT/ THURSDAY...

* WHAT...Temperatures as low as 33 will result in frost 
  formation.

* WHERE...Portions of east Tennessee.

* WHEN...From midnight EDT /11 PM CDT/ tonight to 9 AM EDT /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.

&&

$$
325 
WWUS74 KMRX 211857
NPWMRX

URGENT - WEATHER MESSAGE
National Weather Service Morristown TN
257 PM EDT Wed Apr 21 2021

TNZ083>086-100>102-220300-
/O.UPG.KMRX.FR.Y.0003.210422T0400Z-210422T1300Z/
/O.EXA.KMRX.FZ.W.0004.210422T0400Z-210422T1300Z/
Rhea-Meigs-McMinn-Northwest Monroe-Bradley-West Polk-East Polk-
Including the cities of Dayton, Evensville, Old Washington, 
Grandview, Spring City, Big Spring, Athens, Clear Water, 
Dentville, Etowah, Sweetwater, Madisonville, Bullet Creek, 
Cleveland, Tasso, Conasauga, Archville, Benton, Parksville, 
Reliance, Big Frog Mountain, Ducktown, and Turtletown
257 PM EDT Wed Apr 21 2021

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT
THURSDAY...

* WHAT...Sub-freezing temperatures as low as 30 expected.

* WHERE...Portions of east Tennessee.

* WHEN...From midnight tonight to 9 AM EDT Thursday.

* IMPACTS...Frost and freeze conditions could kill crops and 
  other sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. Those that
have in-ground sprinkler systems should drain them and cover
above-ground pipes to protect them from freezing.

&&

$$

NCZ060-061-TNZ012>018-035>047-067>074-081-082-087-VAZ001-002-005-
006-008-220300-
/O.CON.KMRX.FZ.W.0004.210422T0400Z-210422T1300Z/
Cherokee-Clay-Scott-Campbell-Claiborne-Hancock-Hawkins-Sullivan-
Johnson-Morgan-Anderson-Union-Grainger-Hamblen-Northwest Cocke-
Cocke Smoky Mountains-Northwest Greene-Southeast Greene-
Washington-Unicoi-Northwest Carter-Southeast Carter-Roane-Loudon-
Knox-Jefferson-Northwest Blount-Blount Smoky Mountains-
North Sevier-Sevier Smoky Mountains-Sequatchie-Bledsoe-
Southeast Monroe-Lee-Wise-Russell-
Including the cities of Andrews, Marble, Topton, Hiawasse Dam, 
Murphy, Unaka, Violet, Shooting Creek, Brasstown, Hayesville, 
Tusquitee, Big South Fork National, Oneida, Smokey Junction, 
Elgin, Huntsville, Norma, Slick Rock, Fincastle, La Follette, 
Elk Valley, Jellico, White Oak, Caryville, Royal Blue, 
Lone Mountain, Sandlick, Springdale, Arthur, Harrogate-Shawanee, 
Clairfield, Howard Quarter, Evanston, Sneedville, Treadway, 
Kyles Ford, Mooresburg, Kingsport, Bristol TN, South Holston Dam,
Doeville, Mountain City, Neva, Shady Valley, Trade, 
Laurel Bloomery, Pine Orchard, High Point, Petros, Oak Ridge, 
Clinton, Maynardville, Norris Lake, Paulette, Rose Hill, 
Sharps Chapel, Luttrell, Bean Station, Alpha, Morristown, 
Russellville, Bybee, Newport, Hartford, Greeneville, Cedar Creek,
Johnson City, Erwin, Unicoi, Limestone Cove, Elizabethton, 
Hampton, Harriman, Eagle Furnace, Rockwood, Bradbury, Fairview, 
Kingston, Oliver Springs, Lenoir City, Loudon, Bearden, 
Knoxville, Lake Forest, Jefferson City, Strawberry Plains, 
Chestnut Hill, Dandridge, White Pine, Happy Valley, Maryville, 
Alcoa, Cades Cove, Harrisburg, Kodak, McMahan, Sevierville, 
Seymour, Pigeon Forge, Elkmont, Gatlinburg, Cagle, Dunlap, 
Cartwright, Lone Oak, Old Cumberland, Palio, Melvine, 
Mount Crest, Pikeville, Brayton, Citico, Coker Creek, 
Big Stone Gap, Norton, Wise, Coeburn, Appalachia, Pardee, 
Hiltons, Hansonville, Lebanon, Dye, Castlewood, Honaker, 
Rosedale, Benhams, Bristol VA, and Abingdon
257 PM EDT Wed Apr 21 2021 /157 PM CDT Wed Apr 21 2021/

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT EDT /11 PM CDT/
TONIGHT TO 9 AM EDT /8 AM CDT/ THURSDAY...

* WHAT...Sub-freezing temperatures as low as 28 expected.

* WHERE...Portions of east Tennessee, southwest Virginia and 
  southwest North Carolina.

* WHEN...From midnight EDT /11 PM CDT/ tonight to 9 AM EDT /8 AM 
  CDT/ Thursday.

* IMPACTS...Frost and freeze conditions could kill crops and 
  other sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. Those that
have in-ground sprinkler systems should drain them and cover
above-ground pipes to protect them from freezing.

&&

$$

TNZ098-099-220300-
/O.CON.KMRX.FR.Y.0003.210422T0400Z-210422T1300Z/
Marion-Hamilton-
Including the cities of South Pittsburg, Haletown (Guild), 
Jasper, Martin Springs, Whitwell, Powells Crossroads, Monteagle, 
and Chattanooga
257 PM EDT Wed Apr 21 2021 /157 PM CDT Wed Apr 21 2021/

...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT EDT /11 PM CDT/
TONIGHT TO 9 AM EDT /8 AM CDT/ THURSDAY...

* WHAT...Temperatures as low as 33 will result in frost 
  formation.

* WHERE...Portions of southeast Tennessee.

* WHEN...From midnight EDT /11 PM CDT/ tonight to 9 AM EDT /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.

&&

$$
880 
WWUS74 KMRX 220117 AAA
NPWMRX

URGENT - WEATHER MESSAGE...UPDATED
National Weather Service Morristown TN
917 PM EDT Wed Apr 21 2021

NCZ060-061-TNZ012>018-035>047-067>074-081>087-100>102-VAZ001-002-
005-006-008-221000-
/O.CON.KMRX.FZ.W.0004.210422T0400Z-210422T1300Z/
Cherokee-Clay-Scott-Campbell-Claiborne-Hancock-Hawkins-Sullivan-
Johnson-Morgan-Anderson-Union-Grainger-Hamblen-Northwest Cocke-
Cocke Smoky Mountains-Northwest Greene-Southeast Greene-
Washington-Unicoi-Northwest Carter-Southeast Carter-Roane-Loudon-
Knox-Jefferson-Northwest Blount-Blount Smoky Mountains-
North Sevier-Sevier Smoky Mountains-Sequatchie-Bledsoe-Rhea-Meigs-
McMinn-Northwest Monroe-Southeast Monroe-Bradley-West Polk-
East Polk-Lee-Wise-Russell-
Including the cities of Andrews, Marble, Topton, Hiawasse Dam, 
Murphy, Unaka, Violet, Shooting Creek, Brasstown, Hayesville, 
Tusquitee, Big South Fork National, Oneida, Smokey Junction, 
Elgin, Huntsville, Norma, Slick Rock, Fincastle, La Follette, 
Elk Valley, Jellico, White Oak, Caryville, Royal Blue, 
Lone Mountain, Sandlick, Springdale, Arthur, Harrogate-Shawanee, 
Clairfield, Howard Quarter, Evanston, Sneedville, Treadway, 
Kyles Ford, Mooresburg, Kingsport, Bristol TN, South Holston Dam,
Doeville, Mountain City, Neva, Shady Valley, Trade, 
Laurel Bloomery, Pine Orchard, High Point, Petros, Oak Ridge, 
Clinton, Maynardville, Norris Lake, Paulette, Rose Hill, 
Sharps Chapel, Luttrell, Bean Station, Alpha, Morristown, 
Russellville, Bybee, Newport, Hartford, Greeneville, Cedar Creek,
Johnson City, Erwin, Unicoi, Limestone Cove, Elizabethton, 
Hampton, Harriman, Eagle Furnace, Rockwood, Bradbury, Fairview, 
Kingston, Oliver Springs, Lenoir City, Loudon, Bearden, 
Knoxville, Lake Forest, Jefferson City, Strawberry Plains, 
Chestnut Hill, Dandridge, White Pine, Happy Valley, Maryville, 
Alcoa, Cades Cove, Harrisburg, Kodak, McMahan, Sevierville, 
Seymour, Pigeon Forge, Elkmont, Gatlinburg, Cagle, Dunlap, 
Cartwright, Lone Oak, Old Cumberland, Palio, Melvine, 
Mount Crest, Pikeville, Brayton, Dayton, Evensville, 
Old Washington, Grandview, Spring City, Big Spring, Athens, 
Clear Water, Dentville, Etowah, Sweetwater, Madisonville, 
Bullet Creek, Citico, Coker Creek, Cleveland, Tasso, Conasauga, 
Archville, Benton, Parksville, Reliance, Big Frog Mountain, 
Ducktown, Turtletown, Big Stone Gap, Norton, Wise, Coeburn, 
Appalachia, Pardee, Hiltons, Hansonville, Lebanon, Dye, 
Castlewood, Honaker, Rosedale, Benhams, Bristol VA, and Abingdon
917 PM EDT Wed Apr 21 2021 /817 PM CDT Wed Apr 21 2021/

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT /8 AM CDT/
THURSDAY...

* WHAT...Sub-freezing temperatures as low as 27 expected.

* WHERE...Portions of east Tennessee, southwest Virginia and 
  southwest North Carolina.

* WHEN...From midnight EDT /11 PM CDT/ tonight to 9 AM EDT /8 AM 
  CDT/ Thursday.

* IMPACTS...Frost and freeze conditions could kill crops and 
  other sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. Those that
have in-ground sprinkler systems should drain them and cover
above-ground pipes to protect them from freezing.

&&

$$

TNZ098-099-221000-
/O.CON.KMRX.FR.Y.0003.210422T0400Z-210422T1300Z/
Marion-Hamilton-
Including the cities of South Pittsburg, Haletown (Guild), 
Jasper, Martin Springs, Whitwell, Powells Crossroads, Monteagle, 
and Chattanooga
917 PM EDT Wed Apr 21 2021 /817 PM CDT Wed Apr 21 2021/

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT /8 AM CDT/
THURSDAY...

* WHAT...Temperatures as low as 33 will result in frost 
  formation.

* WHERE...Portions of southeast Tennessee.

* WHEN...From midnight EDT /11 PM CDT/ tonight to 9 AM EDT /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.

&&

$$
687 
WWUS74 KMRX 220712
NPWMRX

URGENT - WEATHER MESSAGE
National Weather Service Morristown TN
312 AM EDT Thu Apr 22 2021

TNZ014>018-041>047-072-074-VAZ001-002-005-006-008-221515-
/O.NEW.KMRX.FZ.W.0005.210423T0600Z-210423T1300Z/
/O.CON.KMRX.FZ.W.0004.000000T0000Z-210422T1300Z/
Claiborne-Hancock-Hawkins-Sullivan-Johnson-Cocke Smoky Mountains-
Northwest Greene-Southeast Greene-Washington-Unicoi-
Northwest Carter-Southeast Carter-Blount Smoky Mountains-
Sevier Smoky Mountains-Lee-Wise-Scott-Russell-
Including the cities of Lone Mountain, Sandlick, Springdale, 
Arthur, Harrogate-Shawanee, Clairfield, Howard Quarter, Evanston,
Sneedville, Treadway, Kyles Ford, Mooresburg, Kingsport, 
Bristol TN, South Holston Dam, Doeville, Mountain City, Neva, 
Shady Valley, Trade, Laurel Bloomery, Hartford, Greeneville, 
Cedar Creek, Johnson City, Erwin, Unicoi, Limestone Cove, 
Elizabethton, Hampton, Cades Cove, Elkmont, Gatlinburg, 
Rose Hill, Big Stone Gap, Norton, Wise, Coeburn, Appalachia, 
Pardee, Hiltons, Hansonville, Lebanon, Dye, Castlewood, Honaker, 
Rosedale, Benhams, Bristol VA, and Abingdon
312 AM EDT Thu Apr 22 2021

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING...
...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM EDT FRIDAY...

* WHAT...For the first Freeze Warning, sub-freezing temperatures 
  as low as 25. For the second Freeze Warning, sub-freezing 
  temperatures as low as 31 expected.

* WHERE...Portions of east Tennessee and southwest Virginia.

* WHEN...For the first Freeze Warning, until 9 AM EDT this 
  morning. For the second Freeze Warning, from 2 AM to 9 AM EDT 
  Friday.

* IMPACTS...Frost and freeze conditions could kill crops and other
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. Those that
have in-ground sprinkler systems should drain them and cover
above-ground pipes to protect them from freezing.

&&

$$

NCZ060-061-TNZ012-013-035>040-067>071-073-081>087-221515-
/O.NEW.KMRX.FR.Y.0004.210423T0600Z-210423T1300Z/
/O.CON.KMRX.FZ.W.0004.000000T0000Z-210422T1300Z/
Cherokee-Clay-Scott-Campbell-Morgan-Anderson-Union-Grainger-
Hamblen-Northwest Cocke-Roane-Loudon-Knox-Jefferson-
Northwest Blount-North Sevier-Sequatchie-Bledsoe-Rhea-Meigs-
McMinn-Northwest Monroe-Southeast Monroe-
Including the cities of Andrews, Marble, Topton, Hiawasse Dam, 
Murphy, Unaka, Violet, Shooting Creek, Brasstown, Hayesville, 
Tusquitee, Big South Fork National, Oneida, Smokey Junction, 
Elgin, Huntsville, Norma, Slick Rock, Fincastle, La Follette, 
Elk Valley, Jellico, White Oak, Caryville, Royal Blue, 
Pine Orchard, High Point, Petros, Oak Ridge, Clinton, 
Maynardville, Norris Lake, Paulette, Rose Hill, Sharps Chapel, 
Luttrell, Bean Station, Alpha, Morristown, Russellville, Bybee, 
Newport, Harriman, Eagle Furnace, Rockwood, Bradbury, Fairview, 
Kingston, Oliver Springs, Lenoir City, Loudon, Bearden, 
Knoxville, Lake Forest, Jefferson City, Strawberry Plains, 
Chestnut Hill, Dandridge, White Pine, Happy Valley, Maryville, 
Alcoa, Harrisburg, Kodak, McMahan, Sevierville, Seymour, 
Pigeon Forge, Cagle, Dunlap, Cartwright, Lone Oak, 
Old Cumberland, Palio, Melvine, Mount Crest, Pikeville, Brayton, 
Dayton, Evensville, Old Washington, Grandview, Spring City, 
Big Spring, Athens, Clear Water, Dentville, Etowah, Sweetwater, 
Madisonville, Bullet Creek, Citico, and Coker Creek
312 AM EDT Thu Apr 22 2021 /212 AM CDT Thu Apr 22 2021/

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT /8 AM CDT/
THIS MORNING...
...FROST ADVISORY IN EFFECT FROM 2 AM EDT /1 AM CDT/ TO 9 AM EDT
/8 AM CDT/ FRIDAY...

* WHAT...For the Freeze Warning, sub-freezing temperatures as 
  low as 29. For the Frost Advisory, temperatures as low as 35 
  will result in frost formation.

* WHERE...Portions of east Tennessee and southwest North 
  Carolina.

* WHEN...For the Freeze Warning, until 9 AM EDT /8 AM CDT/ this 
  morning. For the Frost Advisory, from 2 AM EDT /1 AM CDT/ to 9 
  AM EDT /8 AM CDT/ Friday.

* IMPACTS...Frost and freeze conditions could kill crops and other
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. Those that
have in-ground sprinkler systems should drain them and cover
above-ground pipes to protect them from freezing.

&&

$$

TNZ100>102-221300-
/O.CON.KMRX.FZ.W.0004.000000T0000Z-210422T1300Z/
Bradley-West Polk-East Polk-
Including the cities of Cleveland, Tasso, Conasauga, Archville, 
Benton, Parksville, Reliance, Big Frog Mountain, Ducktown, 
and Turtletown
312 AM EDT Thu Apr 22 2021

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING...

* WHAT...Sub-freezing temperatures as low as 27 expected.

* WHERE...Portions of east Tennessee, southwest Virginia and 
  southwest North Carolina.

* WHEN...Through 9 AM EDT /8 AM CDT/ this morning.

* IMPACTS...Frost and freeze conditions could kill crops and 
  other sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. Those that
have in-ground sprinkler systems should drain them and cover
above-ground pipes to protect them from freezing.

&&

$$

TNZ098-099-221300-
/O.CON.KMRX.FR.Y.0003.000000T0000Z-210422T1300Z/
Marion-Hamilton-
Including the cities of South Pittsburg, Haletown (Guild), 
Jasper, Martin Springs, Whitwell, Powells Crossroads, Monteagle, 
and Chattanooga
312 AM EDT Thu Apr 22 2021 /212 AM CDT Thu Apr 22 2021/

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT /8 AM CDT/
THIS MORNING...

* WHAT...Temperatures as low as 33 will result in frost 
  formation.

* WHERE...Portions of southeast Tennessee.

* WHEN...Through 9 AM EDT /8 AM CDT/ this morning.

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 21, 3:04 AM EDTFreeze WarningMRXAnderson, Bledsoe, Blount, Bradley, Campbell, Carter and 25 more30 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.