Alert archive / Tennessee / Freeze Warnings in 2021

Freeze Warning 1, NWS Morristown, TN

March 31, 20217 counties in Virginia; 31 counties in Tennessee; Cherokee County, Clay County, North Carolina

NWS Morristown, TN issued this freeze warning at Mar 31, 2021, 3:38 PM EDT for 7 counties in Virginia; 31 counties in Tennessee; Cherokee County, Clay County, North Carolina. It took effect at Apr 1, 2021, 4:00 AM EDT. It was in force for 5 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
Mar 31, 2021, 3:38 PM EDT (19:38 UTC)
In effect from
Apr 1, 2021, 4:00 AM EDT
Expired
Apr 1, 2021, 9:00 AM EDT
In force
5 hr
Issued by
NWS Morristown, TN
All 40 counties

Cherokee County, NC, Clay County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Sullivan County, TN, Union County, TN, Washington County, TN, City of Bristol, VA, City of Norton, VA, Lee County, VA, Russell County, VA, Scott County, VA, Washington County, VA, Wise County, VA

The radar

The Knoxville radar (KMRX), 33 km from the middle of the area, began a volume at 19:39 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 12:00Z, 7.6 hours before the alert went out and 259 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 12:00Z on 2021-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2021-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
498 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

776 
WWUS74 KMRX 311938
NPWMRX

URGENT - WEATHER MESSAGE
National Weather Service Morristown TN
338 PM EDT Wed Mar 31 2021

NCZ060-061-TNZ102-010345-
/O.NEW.KMRX.FZ.W.0001.210401T0800Z-210401T1300Z/
/O.NEW.KMRX.WI.Y.0010.210401T0200Z-210401T1800Z/
/O.NEW.KMRX.FZ.A.0001.210402T0300Z-210402T1400Z/
Cherokee-Clay-East Polk-
Including the cities of Andrews, Marble, Topton, Hiawasse Dam, 
Murphy, Unaka, Violet, Shooting Creek, Brasstown, Hayesville, 
Tusquitee, Big Frog Mountain, Ducktown, and Turtletown
338 PM EDT Wed Mar 31 2021

...WIND ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 2 PM EDT
THURSDAY...
...FREEZE WARNING IN EFFECT FROM 4 AM TO 9 AM EDT THURSDAY...
...FREEZE WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY
MORNING...

* WHAT...For the Freeze Warning, sub-freezing temperatures as low
  as 29 expected. For the Wind Advisory, north winds 15 to 30 mph
  with gusts up to 45 mph expected. For the Freeze Watch, sub- 
  freezing temperatures as low as 23 possible.

* WHERE...In Tennessee, East Polk County. In North Carolina, 
  Cherokee and Clay Counties.

* WHEN...For the Freeze Warning, from 4 AM to 9 AM EDT Thursday. 
  For the Wind Advisory, from 10 PM this evening to 2 PM EDT 
  Thursday. For the Freeze Watch, from Thursday evening through 
  Friday morning.

* IMPACTS...Gusty winds could blow around unsecured objects. Tree
  limbs could be blown down and a few power outages may result.
  Frost and freeze conditions could kill crops and other sensitive
  vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

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.

&&

$$

TNZ012>017-035>040-042-044-046-067>071-073-081>086-098>101-VAZ001-
002-005-006-008-010345-
/O.NEW.KMRX.FZ.W.0001.210401T0800Z-210401T1300Z/
/O.NEW.KMRX.FZ.A.0001.210402T0300Z-210402T1400Z/
Scott-Campbell-Claiborne-Hancock-Hawkins-Sullivan-Morgan-Anderson-
Union-Grainger-Hamblen-Northwest Cocke-Northwest Greene-
Washington-Northwest Carter-Roane-Loudon-Knox-Jefferson-
Northwest Blount-North Sevier-Sequatchie-Bledsoe-Rhea-Meigs-
McMinn-Northwest Monroe-Marion-Hamilton-Bradley-West Polk-Lee-
Wise-Russell-
Including the cities of 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, Pine Orchard, High Point, Petros, 
Oak Ridge, Clinton, Maynardville, Norris Lake, Paulette, 
Rose Hill, Sharps Chapel, Luttrell, Bean Station, Alpha, 
Morristown, Russellville, Bybee, Newport, Greeneville, 
Johnson City, Elizabethton, 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, 
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, South Pittsburg, Haletown (Guild), 
Jasper, Martin Springs, Whitwell, Powells Crossroads, Monteagle, 
Chattanooga, Cleveland, Tasso, Conasauga, Archville, Benton, 
Parksville, Reliance, Big Stone Gap, Norton, Wise, Coeburn, 
Appalachia, Pardee, Hiltons, Hansonville, Lebanon, Dye, 
Castlewood, Honaker, Rosedale, Benhams, Bristol VA, and Abingdon
338 PM EDT Wed Mar 31 2021 /238 PM CDT Wed Mar 31 2021/

...FREEZE WARNING IN EFFECT FROM 4 AM EDT /3 AM CDT/ TO 9 AM EDT
/8 AM CDT/ THURSDAY...
...FREEZE WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY
MORNING...

* WHAT...For the Freeze Warning, sub-freezing temperatures as 
  low as 30 expected. For the Freeze Watch, sub-freezing 
  temperatures as low as 23 possible.

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

* WHEN...For the Freeze Warning, from 4 AM EDT /3 AM CDT/ to 9 
  AM EDT /8 AM CDT/ Thursday. For the Freeze Watch, from 
  Thursday evening through Friday 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.

&&

$$

TNZ018-041-043-045-047-072-074-087-010345-
/O.NEW.KMRX.WI.Y.0010.210401T0200Z-210401T1800Z/
Johnson-Cocke Smoky Mountains-Southeast Greene-Unicoi-
Southeast Carter-Blount Smoky Mountains-Sevier Smoky Mountains-
Southeast Monroe-
Including the cities of Doeville, Mountain City, Neva, 
Shady Valley, Trade, Laurel Bloomery, Hartford, Cedar Creek, 
Erwin, Unicoi, Limestone Cove, Hampton, Cades Cove, Elkmont, 
Gatlinburg, Citico, and Coker Creek
338 PM EDT Wed Mar 31 2021

...WIND ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 2 PM EDT
THURSDAY...

* WHAT...Northwest winds 15 to 30 mph with gusts up to 45 mph 
  expected.

* WHERE...Portions of east Tennessee.

* WHEN...From 10 PM this evening to 2 PM EDT Thursday.

* IMPACTS...Gusty winds could blow around unsecured objects. Tree
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$
3 follow-up statements
836 
WWUS74 KMRX 010305
NPWMRX

URGENT - WEATHER MESSAGE
National Weather Service Morristown TN
1105 PM EDT Wed Mar 31 2021

NCZ060-061-TNZ102-011000-
/O.CON.KMRX.FZ.W.0001.210401T0800Z-210401T1300Z/
/O.CON.KMRX.WI.Y.0010.000000T0000Z-210401T1800Z/
/O.CON.KMRX.FZ.A.0001.210402T0300Z-210402T1400Z/
Cherokee-Clay-East Polk-
Including the cities of Andrews, Marble, Topton, Hiawasse Dam, 
Murphy, Unaka, Violet, Shooting Creek, Brasstown, Hayesville, 
Tusquitee, Big Frog Mountain, Ducktown, and Turtletown
1105 PM EDT Wed Mar 31 2021

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THURSDAY...
...FREEZE WARNING REMAINS IN EFFECT FROM 4 AM TO 9 AM EDT
THURSDAY...
...FREEZE WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH
FRIDAY MORNING...

* WHAT...For the Freeze Warning, sub-freezing temperatures as 
  low as 29 expected. For the Wind Advisory, north winds 15 to 
  30 mph with gusts up to 45 mph expected. For the Freeze Watch, 
  sub- freezing temperatures as low as 23 possible.

* WHERE...In Tennessee, East Polk County. In North Carolina, 
  Cherokee and Clay Counties.

* WHEN...For the Freeze Warning, from 4 AM to 9 AM EDT Thursday.
  For the Wind Advisory, from now to 2 PM EDT Thursday. For the 
  Freeze Watch, from Thursday evening through Friday morning.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions could kill crops and other 
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

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.

&&

$$

TNZ012>017-035>040-042-044-046-067>071-073-081>086-098>101-VAZ001-
002-005-006-008-011000-
/O.CON.KMRX.FZ.W.0001.210401T0800Z-210401T1300Z/
/O.CON.KMRX.FZ.A.0001.210402T0300Z-210402T1400Z/
Scott-Campbell-Claiborne-Hancock-Hawkins-Sullivan-Morgan-Anderson-
Union-Grainger-Hamblen-Northwest Cocke-Northwest Greene-
Washington-Northwest Carter-Roane-Loudon-Knox-Jefferson-
Northwest Blount-North Sevier-Sequatchie-Bledsoe-Rhea-Meigs-
McMinn-Northwest Monroe-Marion-Hamilton-Bradley-West Polk-Lee-
Wise-Russell-
Including the cities of 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, Pine Orchard, High Point, Petros, 
Oak Ridge, Clinton, Maynardville, Norris Lake, Paulette, 
Rose Hill, Sharps Chapel, Luttrell, Bean Station, Alpha, 
Morristown, Russellville, Bybee, Newport, Greeneville, 
Johnson City, Elizabethton, 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, 
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, South Pittsburg, Haletown (Guild), 
Jasper, Martin Springs, Whitwell, Powells Crossroads, Monteagle, 
Chattanooga, Cleveland, Tasso, Conasauga, Archville, Benton, 
Parksville, Reliance, Big Stone Gap, Norton, Wise, Coeburn, 
Appalachia, Pardee, Hiltons, Hansonville, Lebanon, Dye, 
Castlewood, Honaker, Rosedale, Benhams, Bristol VA, and Abingdon
1105 PM EDT Wed Mar 31 2021 /1005 PM CDT Wed Mar 31 2021/

...FREEZE WARNING REMAINS IN EFFECT FROM 4 AM EDT /3 AM CDT/ TO
9 AM EDT /8 AM CDT/ THURSDAY...
...FREEZE WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH
FRIDAY MORNING...

* WHAT...For the Freeze Warning, sub-freezing temperatures as 
  low as 30 expected. For the Freeze Watch, sub-freezing 
  temperatures as low as 23 possible.

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

* WHEN...For the Freeze Warning, from 4 AM EDT /3 AM CDT/ to 9 
  AM EDT /8 AM CDT/ Thursday. For the Freeze Watch, from 
  Thursday evening through Friday 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.

&&

$$

TNZ018-041-043-045-047-072-074-087-011000-
/O.CON.KMRX.WI.Y.0010.000000T0000Z-210401T1800Z/
Johnson-Cocke Smoky Mountains-Southeast Greene-Unicoi-
Southeast Carter-Blount Smoky Mountains-Sevier Smoky Mountains-
Southeast Monroe-
Including the cities of Doeville, Mountain City, Neva, 
Shady Valley, Trade, Laurel Bloomery, Hartford, Cedar Creek, 
Erwin, Unicoi, Limestone Cove, Hampton, Cades Cove, Elkmont, 
Gatlinburg, Citico, and Coker Creek
1105 PM EDT Wed Mar 31 2021

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THURSDAY...

* WHAT...Northwest winds 15 to 30 mph with gusts up to 45 mph 
  expected.

* WHERE...Portions of east Tennessee.

* WHEN...From now to 2 PM EDT Thursday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$
136 
WWUS74 KMRX 010759
NPWMRX

URGENT - WEATHER MESSAGE
National Weather Service Morristown TN
359 AM EDT Thu Apr 1 2021

NCZ060-061-TNZ102-011600-
/O.CAN.KMRX.WI.Y.0010.000000T0000Z-210401T1800Z/
/O.CON.KMRX.FZ.W.0001.210401T0800Z-210401T1300Z/
/O.CON.KMRX.FZ.A.0001.210402T0300Z-210402T1400Z/
Cherokee-Clay-East Polk-
Including the cities of Andrews, Marble, Topton, Hiawasse Dam, 
Murphy, Unaka, Violet, Shooting Creek, Brasstown, Hayesville, 
Tusquitee, Big Frog Mountain, Ducktown, and Turtletown
359 AM EDT Thu Apr 1 2021

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING...
...FREEZE WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH
FRIDAY MORNING...
...WIND ADVISORY IS CANCELLED...

* WHAT...For the Freeze Warning, sub-freezing temperatures as low
  as 29 expected. For the Freeze Watch, sub-freezing temperatures
  as low as 23 possible.

* WHERE...In Tennessee, East Polk County. In North Carolina, 
  Cherokee and Clay Counties.

* WHEN...For the Freeze Warning, until 9 AM EDT this morning. 
  For the Freeze Watch, from this evening through Friday 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.

&&

$$

TNZ018-041-043-045-047-072-074-087-010900-
/O.CAN.KMRX.WI.Y.0010.000000T0000Z-210401T1800Z/
Johnson-Cocke Smoky Mountains-Southeast Greene-Unicoi-
Southeast Carter-Blount Smoky Mountains-Sevier Smoky Mountains-
Southeast Monroe-
359 AM EDT Thu Apr 1 2021

...WIND ADVISORY IS CANCELLED...

Winds have decreased across the advisory area early this morning 
and are not expected to increase later today to reach advisory 
levels so the wind advisory has been cancelled.


$$

TNZ012>017-035>040-042-044-046-067>071-073-081>086-098>101-VAZ001-
002-005-006-008-011600-
/O.CON.KMRX.FZ.W.0001.210401T0800Z-210401T1300Z/
/O.CON.KMRX.FZ.A.0001.210402T0300Z-210402T1400Z/
Scott-Campbell-Claiborne-Hancock-Hawkins-Sullivan-Morgan-Anderson-
Union-Grainger-Hamblen-Northwest Cocke-Northwest Greene-
Washington-Northwest Carter-Roane-Loudon-Knox-Jefferson-
Northwest Blount-North Sevier-Sequatchie-Bledsoe-Rhea-Meigs-
McMinn-Northwest Monroe-Marion-Hamilton-Bradley-West Polk-Lee-
Wise-Russell-
Including the cities of 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, Pine Orchard, High Point, Petros, 
Oak Ridge, Clinton, Maynardville, Norris Lake, Paulette, 
Rose Hill, Sharps Chapel, Luttrell, Bean Station, Alpha, 
Morristown, Russellville, Bybee, Newport, Greeneville, 
Johnson City, Elizabethton, 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, 
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, South Pittsburg, Haletown (Guild), 
Jasper, Martin Springs, Whitwell, Powells Crossroads, Monteagle, 
Chattanooga, Cleveland, Tasso, Conasauga, Archville, Benton, 
Parksville, Reliance, Big Stone Gap, Norton, Wise, Coeburn, 
Appalachia, Pardee, Hiltons, Hansonville, Lebanon, Dye, 
Castlewood, Honaker, Rosedale, Benhams, Bristol VA, and Abingdon
359 AM EDT Thu Apr 1 2021 /259 AM CDT Thu Apr 1 2021/

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT /8 AM CDT/
THIS MORNING...
...FREEZE WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH
FRIDAY MORNING...

* WHAT...For the Freeze Warning, sub-freezing temperatures as 
  low as 30 expected. For the Freeze Watch, sub-freezing 
  temperatures as low as 23 possible.

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

* WHEN...For the Freeze Warning, from 4 AM EDT /3 AM CDT/ to 9 
  AM EDT /8 AM CDT/ Thursday. For the Freeze Watch, from 
  Thursday evening through Friday 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.

&&

$$

TD
340 
WWUS74 KMRX 011322
NPWMRX

URGENT - WEATHER MESSAGE
National Weather Service Morristown TN
922 AM EDT Thu Apr 1 2021

NCZ060-061-TNZ012>017-035>040-042-044-046-067>071-073-081>086-
098>102-VAZ001-002-005-006-008-020330-
/O.EXP.KMRX.FZ.W.0001.000000T0000Z-210401T1300Z/
/O.UPG.KMRX.FZ.A.0001.210402T0300Z-210402T1400Z/
/O.NEW.KMRX.FZ.W.0002.210402T0300Z-210402T1400Z/
Cherokee-Clay-Scott-Campbell-Claiborne-Hancock-Hawkins-Sullivan-
Morgan-Anderson-Union-Grainger-Hamblen-Northwest Cocke-
Northwest Greene-Washington-Northwest Carter-Roane-Loudon-Knox-
Jefferson-Northwest Blount-North Sevier-Sequatchie-Bledsoe-Rhea-
Meigs-McMinn-Northwest Monroe-Marion-Hamilton-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, Pine 
Orchard, High Point, Petros, Oak Ridge, Clinton, Maynardville, 
Norris Lake, Paulette, Rose Hill, Sharps Chapel, Luttrell, Bean 
Station, Alpha, Morristown, Russellville, Bybee, Newport, 
Greeneville, Johnson City, Elizabethton, 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, 
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, South Pittsburg, Haletown (Guild), 
Jasper, Martin Springs, Whitwell, Powells Crossroads, Monteagle, 
Chattanooga, 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
922 AM EDT Thu Apr 1 2021 /822 AM CDT Thu Apr 1 2021/

...FREEZE WARNING IN EFFECT FROM 11 PM EDT /10 PM CDT/ THIS
EVENING TO 10 AM EDT /9 AM CDT/ FRIDAY...

* WHAT...Sub-freezing temperatures as low as 23 expected.

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

* WHEN...From 11 PM EDT /10 PM CDT/ this evening to 10 AM EDT /9 
  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.

&&

$$

What forecasters said that day

The local office's own words before this freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Morristown, TN wrote its last area forecast discussion before this freeze warning went out at Mar 31, 3:27 PM EDT, 11 minutes earlier.

Area forecast discussion, Mar 31, 3:27 PM EDT, 11 minutes before
AREA FORECAST DISCUSSION
National Weather Service Morristown TN
327 PM EDT Wed Mar 31 2021

.SHORT TERM (Today through Tomorrow)...

Currently have rain moving across the eastern Tennessee Valley as
the trough continues to swing through the eastern  half of the
country. There is another round of light precipitation moving across
Middle Tennessee and expect that to move through the forecast area
tonight and could bring some light precipitation, including possibly
snow. Latest high resolution models have backed off on precipitation
overnight when temperatures drop below freezing in the higher
elevation overnight. But if enough moisture gets caught on this side
of the mountains usually the low level jet is able to squeeze it out
along the topography. Have stuck relatively close to the WPC
forecast for snowfall with a dusting across parts of southwest
Virginia and slowly increasing totals up to around 3 inches at the
very tops of the mountains. Since the chance of precipitation is
somewhat low and the area that is most likely going to see moderate
accumulating snow is generally above 3,000 feet will hold off on any
sort of winter weather advisory. Other mountainous weather will be
the breezy conditions overnight as the low level winds out of the
northwest pushes into the area. Model soundings show wind speeds of
around 40-50 knots at 850mb, so with the northwest orientation the
mountain wave winds are more likely on the North Carolina side of
the mountains, but with winds that strong we should still see
advisory criteria winds up in the mountains of Tennessee.

The more widespread winter impact will be the near/below freezing
temperatures expected tonight (and especially tomorrow night). The
forecast for tonight calls for temperatures near or just above
freezing across the entire forecast area. Instead of trying to play
cute with which specific counties might freeze and which might not,
have played it safe and gone with a freeze warning across the entire
area (outside of the mountains). Think at least some part of every
county will get below freezing tonight, and with this being the
first time temperatures have gotten this cold since many of the
local plants have started growing, wanted to play it on the safe
side. Just for reference the last time each of the climate sites got
below freezing:

 KCHA - March 8 (31)
 KTYS - March 9 (31)
 KTRI - March 29 (32)

Trying to forecast the frost potential is much trickier because the
winds should remain somewhat breezy overnight, which should inhibit
frost formation... But have put in some patchy frost in the river
valleys and other low lying areas that might miss out on the
winds... Am not super confident on frost forming even in these
locations, but again wanted to play it "better safe than sorry."

Tomorrow should be a quiet weather day, except for the cold weather
with highs only expected to be in the 40's, but some sunshine should
hopefully warm the spirits.

ABM

.Long Term (Thursday night through Wednesday)...

The main message for the long term is the unseasonably cold
temperatures for Thursday night and Friday night. The coldest night
will be Thursday with lows ranging from the low-to-mid 20s. Lows
Thursday night will drop to near record lows for the date. TRI is
likely to break its record, which is 27, the forecast low is 24.
Records at CHA and TYS (25 and 24 respectively) should be safe but
will get within a couple degrees. A few degrees warmer on Friday
night with lows in the mid-to-upper 20s. These lows will be roughly
15 to 18 degrees below normal. A freeze watch is in effect for
Thursday night.

The rest of the forecast is dry with warming temps. High pressure
begins to build back in on Friday and moreso over the weekend. Highs
on Friday will range from the mid 40s to near 50. Our biggest warmup
comes over the weekend as heights rise with the advancing high.
Highs on Saturday back around 60 and into the mid 60s by Sunday.

Temps continue to climb through the rest of the week due to ridging
in place. We are quickly back into the low-to-mid 70s by Tuesday and
mid-to-upper 70s by Wednesday. Our next system comes at the end of
the period as a front approaches. The best chances for rain look
like it will come just after this long term period.

SR

&&

.AVIATION...
18Z TAF DISCUSSION.

Showers are moving out of the area, but MVFR conditions will
likely stick around for a while. Expect the breezy weather to
continue into the overnight hours with the low level jet ramping
up. Expect conditions to improve back to VFR across the are by
tomorrow.

ABM

&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             34  51  28  53  30 /  40   0   0   0   0
Knoxville McGhee Tyson Airport, TN  33  45  27  49  29 /  60  10   0   0   0
Oak Ridge, TN                       33  48  26  50  29 /  60  10   0   0   0
Tri Cities Airport, TN              33  44  24  45  26 /  70  20  10   0   0

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...Wind Advisory from 10 PM this evening to 2 PM EDT Thursday for
     Cherokee-Clay.

     Freeze Watch from Thursday evening through Friday morning for
     Cherokee-Clay.

     Freeze Warning from 4 AM to 9 AM EDT Thursday for Cherokee-Clay.

TN...Wind Advisory from 10 PM this evening to 2 PM EDT Thursday for
     Blount Smoky Mountains-Cocke Smoky Mountains-East Polk-
     Johnson-Sevier Smoky Mountains-Southeast Carter-Southeast
     Greene-Southeast Monroe-Unicoi.

     Freeze Watch from Thursday evening through Friday morning for
     Anderson-Bledsoe-Bradley-Campbell-Claiborne-East Polk-
     Grainger-Hamblen-Hamilton-Hancock-Hawkins-Jefferson-Knox-
     Loudon-Marion-McMinn-Meigs-Morgan-North Sevier-Northwest
     Blount-Northwest Carter-Northwest Cocke-Northwest Greene-
     Northwest Monroe-Rhea-Roane-Scott-Sequatchie-Sullivan-Union-
     Washington-West Polk.

     Freeze Warning from 4 AM EDT /3 AM CDT/ to 9 AM EDT /8 AM CDT/
     Thursday for Anderson-Bledsoe-Bradley-Campbell-Claiborne-
     East Polk-Grainger-Hamblen-Hamilton-Hancock-Hawkins-
     Jefferson-Knox-Loudon-Marion-McMinn-Meigs-Morgan-North
     Sevier-Northwest Blount-Northwest Carter-Northwest Cocke-
     Northwest Greene-Northwest Monroe-Rhea-Roane-Scott-
     Sequatchie-Sullivan-Union-Washington-West Polk.

VA...Freeze Watch from Thursday evening through Friday morning for
     Lee-Russell-Scott-Washington-Wise.

     Freeze Warning from 4 AM to 9 AM EDT Thursday for Lee-Russell-
     Scott-Washington-Wise.

&&
Hazardous weather outlook, Mar 31, 3:32 PM EDT, 6 minutes before
Hazardous Weather Outlook
National Weather Service Morristown TN
332 PM EDT Wed Mar 31 2021

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-011945-
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-Marion-Hamilton-Bradley-
West Polk-East Polk-Lee-Wise-Russell-
332 PM EDT Wed Mar 31 2021 /232 PM CDT Wed Mar 31 2021/

This Hazardous Weather Outlook is for portions of southwest North
Carolina...east Tennessee and southwest Virginia.

.DAY ONE...This Afternoon and Tonight

A cold airmass will move into the area tonight with a light
accumulation of snow across higher elevations by Thursday morning.
Northwest winds will bring in unseasonably low wind chill
temperatures by late tonight with 20s lower elevations and teens
higher elevations. A wind advisory is in effect for the southern
Appalachian Mountains tonight into tomorrow for winds over 30
mph.

A freeze warning is in effect tonight for the entire eastern
Tennessee Valley. Temperatures are expected to get near or just
below freezing early tomorrow morning.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

A cold airmass will be remain over the region Thursday through
Friday night. Below freezing temperatures are expected over the
northern part of East Tennessee and southwest Virginia Thursday
morning. Much colder temperatures with a hard freeze over all but
the extreme southern Tennessee Valley will occur Friday morning.
Saturday morning lows will again be below freezing but slightly
warmer than Friday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not needed at this time.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 31, 3:38 PM EDTFreeze WatchMRXLee, Russell, Scott, Washington, Wise, City of Bristol and 1 more18 hr
Mar 30, 9:37 PM EDTWind AdvisoryMRXBlount, Carter, Cocke, Greene, Johnson, Monroe and 2 more15 hr
Mar 31, 4:57 AM EDTAreal Flood AdvisoryMRXMarion2 hr
Mar 31, 5:40 AM EDTAreal Flood AdvisoryMRXBradley, Hamilton3 hr
Mar 31, 7:57 AM EDTAreal Flood AdvisoryMRXMarion46 min
Mar 31, 8:42 AM EDTFlash Flood WarningMRXBradley, Hamilton, Marion, Sequatchie5 hr
Mar 31, 8:52 AM EDTAreal Flood AdvisoryMRXBlount, Jefferson, Loudon, Sevier5 hr
Mar 31, 8:59 AM EDTAreal Flood AdvisoryMRXBledsoe, Rhea, Sequatchie4 hr
Mar 31, 9:05 AM EDTAreal Flood AdvisoryMRXMonroe5 hr
Mar 31, 9:52 AM EDTAreal Flood AdvisoryMRXMonroe, Polk3 hr
Mar 31, 10:55 AM EDTRiver Flood WarningMRXBledsoe, Marion, Sequatchie35 hr
Mar 31, 10:57 AM EDTRiver Flood WarningMRXHamilton47 hr
Mar 31, 12:46 PM EDTRiver Flood WarningMRXCocke22 hr
Mar 31, 1:31 PM EDTAreal Flood WarningMRXBradley, Hamilton, Marion, Sequatchie6 hr
Mar 31, 2:04 PM EDTRiver Flood WarningMRXPolk14 hr
Mar 31, 3:38 PM EDTWind AdvisoryMRXBlount, Carter, Cocke, Greene, Johnson, Monroe and 3 more12 hr

Nearby

Freeze Warnings in Tennessee, 2021Freeze Warnings in Virginia, 2021Freeze Warnings in North Carolina, 2021Every 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.