Alert archive / Tennessee / Frost Advisories in 2021
Frost Advisory 3, NWS Memphis, TN
NWS Memphis, TN issued this frost advisory at Apr 21, 2021, 3:02 AM CDT for 4 states. It took effect at Apr 22, 2021, 1:00 AM CDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Apr 21, 2021, 3:02 AM CDT (08:02 UTC)
- In effect from
- Apr 22, 2021, 1:00 AM CDT
- Expired
- Apr 22, 2021, 9:00 AM CDT
- In force
- 8 hr
- Issued by
- NWS Memphis, TN
All 43 counties
Clay County, AR, Craighead County, AR, Greene County, AR, Mississippi County, AR, Poinsett County, AR, Dunklin County, MO, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe County, MS, Pontotoc County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN
The radar
The Memphis radar (KNQA), 65 km from the middle of the area, began a volume at 08:05 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
Little Rock, AR (KLZK), launched 00:00Z, 8.0 hours before the alert went out and 90 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
- 1128 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
274 WWUS74 KMEG 210802 NPWMEG URGENT - WEATHER MESSAGE National Weather Service Memphis TN 302 AM CDT Wed Apr 21 2021 TNZ003-221200- /O.NEW.KMEG.FR.Y.0003.210422T0600Z-210422T1200Z/ /O.CON.KMEG.FZ.W.0004.000000T0000Z-210421T1400Z/ Weakley- Including the cities of Martin and Dresden 302 AM CDT Wed Apr 21 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...FROST ADVISORY IN EFFECT FROM 1 AM TO 7 AM CDT THURSDAY... * WHAT...For the Freeze Warning, sub-freezing temperatures as low as 33. For the Frost Advisory, temperatures as low as 36 will result in frost formation. * WHERE...Weakley County. * WHEN...For the Freeze Warning, until 9 AM CDT this morning. For the Frost Advisory, from 1 AM to 7 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. && $$ ARZ009-018-026>028-MOZ113-115-TNZ001-002-019-048-211400- /O.CON.KMEG.FZ.W.0004.000000T0000Z-210421T1400Z/ Clay-Greene-Craighead-Poinsett-Mississippi-Dunklin-Pemiscot-Lake- Obion-Dyer-Lauderdale- Including the cities of Piggott, Corning, Paragould, Jonesboro, Harrisburg, Blytheville, Kennett, Caruthersville, Tiptonville, Union City, Dyersburg, and Ripley TN 302 AM CDT Wed Apr 21 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Portions of West Tennessee, East Arkansas and Southeast Missouri. * WHEN...From 3 AM to 9 AM CDT Wednesday. * IMPACTS...Frost and freeze conditions may kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...This is a very late season freeze. Bring sensitive plants indoors or cover them with a blanket, sheet, or other covering. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ MSZ004>006-009-014>017-023-024-TNZ004-020>022-052>055-090>092- 221200- /O.NEW.KMEG.FR.Y.0003.210422T0600Z-210422T1200Z/ Tippah-Alcorn-Tishomingo-Prentiss-Union-Pontotoc-Lee MS-Itawamba- Chickasaw-Monroe-Henry-Gibson-Carroll-Benton TN-Madison-Chester- Henderson-Decatur-Hardeman-McNairy-Hardin- Including the cities of Ripley MS, Corinth, Iuka, Booneville, New Albany, Pontotoc, Tupelo, Fulton, Houston, Okolona, Amory, Aberdeen, Paris, Humboldt, Milan, Huntingdon, Camden, Jackson, Henderson, Lexington, Parsons, Decaturville, Bolivar, Selmer, and Savannah 302 AM CDT Wed Apr 21 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 7 AM CDT THURSDAY... * WHAT...Temperatures as low as 36 will result in frost formation. * WHERE...Portions of North Mississippi and West Tennessee. * WHEN...From 1 AM to 7 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. A Frost Advisory means that widespread frost is expected. Sensitive outdoor plants may be killed if left uncovered. && $$
4 follow-up statements
172 WWUS74 KMEG 211404 NPWMEG URGENT - WEATHER MESSAGE National Weather Service Memphis TN 904 AM CDT Wed Apr 21 2021 ARZ009-018-026>028-MOZ113-115-TNZ001-002-019-048-212215- /O.EXP.KMEG.FZ.W.0004.000000T0000Z-210421T1400Z/ /O.EXB.KMEG.FR.Y.0003.210422T0600Z-210422T1400Z/ Clay-Greene-Craighead-Poinsett-Mississippi-Dunklin-Pemiscot-Lake- Obion-Dyer-Lauderdale- Including the cities of Piggott, Corning, Paragould, Jonesboro, Harrisburg, Blytheville, Kennett, Caruthersville, Tiptonville, Union City, Dyersburg, and Ripley TN 904 AM CDT Wed Apr 21 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... ...FREEZE WARNING HAS EXPIRED... * WHAT...Temperatures as low as 36 will result in frost formation. * WHERE...Portions of West Tennessee, East Arkansas and Southeast Missouri. * WHEN...From 1 AM to 9 AM CDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ TNZ003-212215- /O.EXP.KMEG.FZ.W.0004.000000T0000Z-210421T1400Z/ /O.EXT.KMEG.FR.Y.0003.210422T0600Z-210422T1400Z/ Weakley- Including the cities of Martin and Dresden 904 AM CDT Wed Apr 21 2021 ...FROST ADVISORY NOW IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... ...FREEZE WARNING HAS EXPIRED... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Weakley County. * WHEN...From 1 AM to 9 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. && $$ MSZ002-003-013-021-022-TNZ049>051-089-212215- /O.EXB.KMEG.FR.Y.0003.210422T0600Z-210422T1400Z/ Marshall-Benton MS-Lafayette-Yalobusha-Calhoun-Tipton-Haywood- Crockett-Fayette- Including the cities of Holly Springs, Ashland, Oxford, Water Valley, Coffeeville, Bruce, Calhoun City, Covington, Brownsville, Alamo, Somerville, and Oakland 904 AM CDT Wed Apr 21 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... * WHAT...Temperatures as low as 35 will result in frost formation. * WHERE...In Mississippi, Marshall, Benton MS, Lafayette, Yalobusha and Calhoun Counties. In Tennessee, Tipton, Haywood, Crockett and Fayette Counties. * WHEN...From 1 AM to 9 AM CDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ KRM MSZ004>006-009-014>017-023-024-TNZ004-020>022-052>055-090>092- 212215- /O.EXT.KMEG.FR.Y.0003.210422T0600Z-210422T1400Z/ Tippah-Alcorn-Tishomingo-Prentiss-Union-Pontotoc-Lee MS-Itawamba- Chickasaw-Monroe-Henry-Gibson-Carroll-Benton TN-Madison-Chester- Henderson-Decatur-Hardeman-McNairy-Hardin- Including the cities of Ripley MS, Corinth, Iuka, Booneville, New Albany, Pontotoc, Tupelo, Fulton, Houston, Okolona, Amory, Aberdeen, Paris, Humboldt, Milan, Huntingdon, Camden, Jackson, Henderson, Lexington, Parsons, Decaturville, Bolivar, Selmer, and Savannah 904 AM CDT Wed Apr 21 2021 ...FROST ADVISORY NOW IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Portions of North Mississippi and West Tennessee. * WHEN...From 1 AM to 9 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. && $$
480 WWUS74 KMEG 212019 NPWMEG URGENT - WEATHER MESSAGE National Weather Service Memphis TN 319 PM CDT Wed Apr 21 2021 TNZ002>004-020>022-050>055-089>092-220430- /O.UPG.KMEG.FR.Y.0003.210422T0600Z-210422T1400Z/ /O.NEW.KMEG.FZ.W.0005.210422T0600Z-210422T1400Z/ Obion-Weakley-Henry-Gibson-Carroll-Benton TN-Haywood-Crockett- Madison-Chester-Henderson-Decatur-Fayette-Hardeman-McNairy-Hardin- Including the cities of Union City, Martin, Dresden, Paris, Humboldt, Milan, Huntingdon, Camden, Brownsville, Alamo, Jackson, Henderson, Lexington, Parsons, Decaturville, Somerville, Oakland, Bolivar, Selmer, and Savannah 319 PM CDT Wed Apr 21 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Portions of West Tennessee. * WHEN...From 1 AM to 9 AM CDT Thursday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ TNZ088-220430- /O.EXA.KMEG.FR.Y.0003.210422T0600Z-210422T1400Z/ Shelby- Including the cities of Bartlett, Germantown, Collierville, Memphis, and Millington 319 PM CDT Wed Apr 21 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Shelby County. * WHEN...From 1 AM to 9 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. && $$ ARZ009-018-026>028-MOZ113-115-MSZ002>006-009-013>017-021>024- TNZ001-019-048-049-220430- /O.CON.KMEG.FR.Y.0003.210422T0600Z-210422T1400Z/ Clay-Greene-Craighead-Poinsett-Mississippi-Dunklin-Pemiscot- Marshall-Benton MS-Tippah-Alcorn-Tishomingo-Prentiss-Lafayette- Union-Pontotoc-Lee MS-Itawamba-Yalobusha-Calhoun-Chickasaw-Monroe- Lake-Dyer-Lauderdale-Tipton- Including the cities of Piggott, Corning, Paragould, Jonesboro, Harrisburg, Blytheville, Kennett, Caruthersville, Holly Springs, Ashland, Ripley MS, Corinth, Iuka, Booneville, Oxford, New Albany, Pontotoc, Tupelo, Fulton, Water Valley, Coffeeville, Bruce, Calhoun City, Houston, Okolona, Amory, Aberdeen, Tiptonville, Dyersburg, Ripley TN, and Covington 319 PM CDT Wed Apr 21 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of North Mississippi, West Tennessee, East Arkansas and the Missouri Bootheel. * WHEN...From 1 AM to 9 AM CDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ KRM
311 WWUS74 KMEG 220232 NPWMEG URGENT - WEATHER MESSAGE National Weather Service Memphis TN 932 PM CDT Wed Apr 21 2021 TNZ002>004-020>022-050>055-089>092-221400- /O.CON.KMEG.FZ.W.0005.210422T0600Z-210422T1400Z/ Obion-Weakley-Henry-Gibson-Carroll-Benton TN-Haywood-Crockett- Madison-Chester-Henderson-Decatur-Fayette-Hardeman-McNairy-Hardin- Including the cities of Union City, Martin, Dresden, Paris, Humboldt, Milan, Huntingdon, Camden, Brownsville, Alamo, Jackson, Henderson, Lexington, Parsons, Decaturville, Somerville, Oakland, Bolivar, Selmer, and Savannah 932 PM CDT Wed Apr 21 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... * WHAT...Sub-freezing temperatures as low as 32 expected. * WHERE...Portions of West Tennessee. * WHEN...From 1 AM to 9 AM CDT Thursday. * IMPACTS...Frost and freeze conditions may 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. && $$ ARZ009-018-026>028-MOZ113-115-MSZ002>006-009-013>017-021>024- TNZ001-019-048-049-088-221400- /O.CON.KMEG.FR.Y.0003.210422T0600Z-210422T1400Z/ Clay-Greene-Craighead-Poinsett-Mississippi-Dunklin-Pemiscot- Marshall-Benton MS-Tippah-Alcorn-Tishomingo-Prentiss-Lafayette- Union-Pontotoc-Lee MS-Itawamba-Yalobusha-Calhoun-Chickasaw-Monroe- Lake-Dyer-Lauderdale-Tipton-Shelby- Including the cities of Piggott, Corning, Paragould, Jonesboro, Harrisburg, Blytheville, Kennett, Caruthersville, Holly Springs, Ashland, Ripley MS, Corinth, Iuka, Booneville, Oxford, New Albany, Pontotoc, Tupelo, Fulton, Water Valley, Coffeeville, Bruce, Calhoun City, Houston, Okolona, Amory, Aberdeen, Tiptonville, Dyersburg, Ripley TN, Covington, Bartlett, Germantown, Collierville, Memphis, and Millington 932 PM CDT Wed Apr 21 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... * WHAT...Temperatures as low as 35 will result in frost formation. * WHERE...Portions of North Mississippi, West Tennessee, East Arkansas and Southeast Missouri. * WHEN...From 1 AM to 9 AM CDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ PWB
256 WWUS74 KMEG 221404 NPWMEG URGENT - WEATHER MESSAGE National Weather Service Memphis TN 904 AM CDT Thu Apr 22 2021 TNZ002>004-020>022-050>055-089>092-221515- /O.EXP.KMEG.FZ.W.0005.000000T0000Z-210422T1400Z/ Obion-Weakley-Henry-Gibson-Carroll-Benton TN-Haywood-Crockett- Madison-Chester-Henderson-Decatur-Fayette-Hardeman-McNairy-Hardin- Including the cities of Union City, Martin, Dresden, Paris, Humboldt, Milan, Huntingdon, Camden, Brownsville, Alamo, Jackson, Henderson, Lexington, Parsons, Decaturville, Somerville, Oakland, Bolivar, Selmer, and Savannah 904 AM CDT Thu Apr 22 2021 ...FREEZE WARNING HAS EXPIRED... Temperatures have climbed above freezing. Thus, the Freeze Warning has been allowed to expire. $$ ARZ009-018-026>028-MOZ113-115-MSZ002>006-009-013>017-021>024- TNZ001-019-048-049-088-221515- /O.EXP.KMEG.FR.Y.0003.000000T0000Z-210422T1400Z/ Clay-Greene-Craighead-Poinsett-Mississippi-Dunklin-Pemiscot- Marshall-Benton MS-Tippah-Alcorn-Tishomingo-Prentiss-Lafayette- Union-Pontotoc-Lee MS-Itawamba-Yalobusha-Calhoun-Chickasaw-Monroe- Lake-Dyer-Lauderdale-Tipton-Shelby- Including the cities of Piggott, Corning, Paragould, Jonesboro, Harrisburg, Blytheville, Kennett, Caruthersville, Holly Springs, Ashland, Ripley MS, Corinth, Iuka, Booneville, Oxford, New Albany, Pontotoc, Tupelo, Fulton, Water Valley, Coffeeville, Bruce, Calhoun City, Houston, Okolona, Amory, Aberdeen, Tiptonville, Dyersburg, Ripley TN, Covington, Bartlett, Germantown, Collierville, Memphis, and Millington 904 AM CDT Thu Apr 22 2021 ...FROST ADVISORY HAS EXPIRED... The threat for frost has ended as temperatures have climbed into the 40s. Thus, the Frost Advisory has been allowed to expire. $$ KRM
The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 3:19 PM CDT | Freeze Warning | MEG | Benton, Carroll, Chester, Crockett, Decatur, Fayette and 10 more | 18 hr |
Nearby
Frost Advisories in Tennessee, 2021Frost Advisories in Mississippi, 2021Frost Advisories in Arkansas, 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.