Alert archive / Tennessee / Freeze Warnings in 2021
Freeze Warning 1, NWS Morristown, TN
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.
- 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
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 3:38 PM EDT | Freeze Watch | MRX | Lee, Russell, Scott, Washington, Wise, City of Bristol and 1 more | 18 hr |
| Mar 30, 9:37 PM EDT | Wind Advisory | MRX | Blount, Carter, Cocke, Greene, Johnson, Monroe and 2 more | 15 hr |
| Mar 31, 4:57 AM EDT | Areal Flood Advisory | MRX | Marion | 2 hr |
| Mar 31, 5:40 AM EDT | Areal Flood Advisory | MRX | Bradley, Hamilton | 3 hr |
| Mar 31, 7:57 AM EDT | Areal Flood Advisory | MRX | Marion | 46 min |
| Mar 31, 8:42 AM EDT | Flash Flood Warning | MRX | Bradley, Hamilton, Marion, Sequatchie | 5 hr |
| Mar 31, 8:52 AM EDT | Areal Flood Advisory | MRX | Blount, Jefferson, Loudon, Sevier | 5 hr |
| Mar 31, 8:59 AM EDT | Areal Flood Advisory | MRX | Bledsoe, Rhea, Sequatchie | 4 hr |
| Mar 31, 9:05 AM EDT | Areal Flood Advisory | MRX | Monroe | 5 hr |
| Mar 31, 9:52 AM EDT | Areal Flood Advisory | MRX | Monroe, Polk | 3 hr |
| Mar 31, 10:55 AM EDT | River Flood Warning | MRX | Bledsoe, Marion, Sequatchie | 35 hr |
| Mar 31, 10:57 AM EDT | River Flood Warning | MRX | Hamilton | 47 hr |
| Mar 31, 12:46 PM EDT | River Flood Warning | MRX | Cocke | 22 hr |
| Mar 31, 1:31 PM EDT | Areal Flood Warning | MRX | Bradley, Hamilton, Marion, Sequatchie | 6 hr |
| Mar 31, 2:04 PM EDT | River Flood Warning | MRX | Polk | 14 hr |
| Mar 31, 3:38 PM EDT | Wind Advisory | MRX | Blount, Carter, Cocke, Greene, Johnson, Monroe and 3 more | 12 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.