Alert archive / Mississippi / Heat Advisories in 2021

Heat Advisory 6, NWS Memphis, TN

July 28, 20214 states

NWS Memphis, TN issued this heat advisory at Jul 28, 2021, 2:38 PM CDT for 4 states. It took effect at Jul 29, 2021, 10:00 AM CDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Jul 28, 2021, 2:38 PM CDT (19:38 UTC)
In effect from
Jul 29, 2021, 10:00 AM CDT
Expired
Jul 29, 2021, 8:00 PM CDT
In force
10 hr
Issued by
NWS Memphis, TN
All 55 counties

Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, Dunklin County, MO, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Coahoma County, MS, DeSoto County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica 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), 45 km from the middle of the area, began a volume at 19:38 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 12:00Z, 7.6 hours before the alert went out and 61 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, Little Rock, AR at 12:00Z on 2021-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2265 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 12:00Z on 2021-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.1939Sfc1 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
2265 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
1019 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted.

326 
WWUS74 KMEG 281938
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
238 PM CDT Wed Jul 28 2021

ARZ049-058-MSZ007-010>013-015>017-020>024-290315-
/O.NEW.KMEG.HT.Y.0006.210729T1500Z-210730T0100Z/
/O.CON.KMEG.HT.Y.0005.000000T0000Z-210729T0000Z/
Lee AR-Phillips-Tunica-Coahoma-Quitman-Panola-Lafayette-Pontotoc-
Lee MS-Itawamba-Tallahatchie-Yalobusha-Calhoun-Chickasaw-Monroe-
Including the cities of Marianna, Helena, West Helena, Tunica, 
Clarksdale, Marks, Batesville, Oxford, Pontotoc, Tupelo, Fulton, 
Charleston, Water Valley, Coffeeville, Bruce, Calhoun City, 
Houston, Okolona, Amory, and Aberdeen
238 PM CDT Wed Jul 28 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...
...HEAT ADVISORY IN EFFECT FROM 10 AM TO 8 PM CDT THURSDAY...

* WHAT...For the first Heat Advisory, heat index values up to 108.
  For the second Heat Advisory, heat index values up to 109 
  expected.

* WHERE...Portions of North Mississippi and East Arkansas.

* WHEN...For the first Heat Advisory, until 7 PM CDT this evening.
  For the second Heat Advisory, from 10 AM to 8 PM CDT Thursday.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

ARZ009-018-026>028-035-036-048-MOZ113-115-MSZ001>006-008-009-014-
TNZ001>004-019>022-048>055-088>092-290315-
/O.NEW.KMEG.HT.Y.0006.210729T1500Z-210730T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
St. Francis-Dunklin-Pemiscot-DeSoto-Marshall-Benton MS-Tippah-
Alcorn-Tishomingo-Tate-Prentiss-Union-Lake-Obion-Weakley-Henry-
Dyer-Gibson-Carroll-Benton TN-Lauderdale-Tipton-Haywood-Crockett-
Madison-Chester-Henderson-Decatur-Shelby-Fayette-Hardeman-McNairy-
Hardin-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, 
Kennett, Caruthersville, Southaven, Olive Branch, Holly Springs, 
Ashland, Ripley MS, Corinth, Iuka, Senatobia, Booneville, 
New Albany, Tiptonville, Union City, Martin, Dresden, Paris, 
Dyersburg, Humboldt, Milan, Huntingdon, Camden, Ripley TN, 
Covington, Brownsville, Alamo, Jackson, Henderson, Lexington, 
Parsons, Decaturville, Bartlett, Germantown, Collierville, 
Memphis, Millington, Somerville, Oakland, Bolivar, Selmer, 
and Savannah
238 PM CDT Wed Jul 28 2021

...HEAT ADVISORY IN EFFECT FROM 10 AM TO 8 PM CDT THURSDAY...

* WHAT...Heat index values up to 109 expected.

* WHERE...Portions of North Mississippi, West Tennessee, East 
  Arkansas and Southeast Missouri.

* WHEN...From 10 AM to 8 PM CDT Thursday.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
5 follow-up statements
860 
WWUS74 KMEG 290008
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
708 PM CDT Wed Jul 28 2021

ARZ049-058-MSZ007-010>013-015>017-020>024-291100-
/O.EXP.KMEG.HT.Y.0005.000000T0000Z-210729T0000Z/
/O.CON.KMEG.HT.Y.0006.210729T1500Z-210730T0100Z/
Lee AR-Phillips-Tunica-Coahoma-Quitman-Panola-Lafayette-Pontotoc-
Lee MS-Itawamba-Tallahatchie-Yalobusha-Calhoun-Chickasaw-Monroe-
Including the cities of Marianna, Helena, West Helena, Tunica, 
Clarksdale, Marks, Batesville, Oxford, Pontotoc, Tupelo, Fulton, 
Charleston, Water Valley, Coffeeville, Bruce, Calhoun City, 
Houston, Okolona, Amory, and Aberdeen
708 PM CDT Wed Jul 28 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM CDT
THURSDAY...

* WHAT...Heat index values up to 110 expected.

* WHERE...Portions of North Mississippi and East Arkansas.

* WHEN...From 10 AM to 8 PM CDT Thursday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

ARZ009-018-026>028-035-036-048-MOZ113-115-MSZ001>006-008-009-014-
TNZ001>004-019>022-048>055-088>092-291100-
/O.CON.KMEG.HT.Y.0006.210729T1500Z-210730T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
St. Francis-Dunklin-Pemiscot-DeSoto-Marshall-Benton MS-Tippah-
Alcorn-Tishomingo-Tate-Prentiss-Union-Lake-Obion-Weakley-Henry-
Dyer-Gibson-Carroll-Benton TN-Lauderdale-Tipton-Haywood-Crockett-
Madison-Chester-Henderson-Decatur-Shelby-Fayette-Hardeman-McNairy-
Hardin-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, 
Kennett, Caruthersville, Southaven, Olive Branch, Holly Springs, 
Ashland, Ripley MS, Corinth, Iuka, Senatobia, Booneville, 
New Albany, Tiptonville, Union City, Martin, Dresden, Paris, 
Dyersburg, Humboldt, Milan, Huntingdon, Camden, Ripley TN, 
Covington, Brownsville, Alamo, Jackson, Henderson, Lexington, 
Parsons, Decaturville, Bartlett, Germantown, Collierville, 
Memphis, Millington, Somerville, Oakland, Bolivar, Selmer, 
and Savannah
708 PM CDT Wed Jul 28 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM CDT
THURSDAY...

* WHAT...Heat index values up to 110 expected.

* WHERE...Portions of North Mississippi, West Tennessee, East 
  Arkansas and Southeast Missouri.

* WHEN...From 10 AM to 8 PM CDT Thursday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
458 
WWUS74 KMEG 290819
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
319 AM CDT Thu Jul 29 2021

ARZ009-018-026>028-035-036-048-049-058-MOZ113-115-MSZ001>017-
020>024-TNZ001>004-019>022-048>055-088>092-300000-
/O.CON.KMEG.HT.Y.0006.210729T1500Z-210730T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
St. Francis-Lee AR-Phillips-Dunklin-Pemiscot-DeSoto-Marshall-
Benton MS-Tippah-Alcorn-Tishomingo-Tunica-Tate-Prentiss-Coahoma-
Quitman-Panola-Lafayette-Union-Pontotoc-Lee MS-Itawamba-
Tallahatchie-Yalobusha-Calhoun-Chickasaw-Monroe-Lake-Obion-
Weakley-Henry-Dyer-Gibson-Carroll-Benton TN-Lauderdale-Tipton-
Haywood-Crockett-Madison-Chester-Henderson-Decatur-Shelby-Fayette-
Hardeman-McNairy-Hardin-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, 
Marianna, Helena, West Helena, Kennett, Caruthersville, 
Southaven, Olive Branch, Holly Springs, Ashland, Ripley MS, 
Corinth, Iuka, Tunica, Senatobia, Booneville, Clarksdale, Marks, 
Batesville, Oxford, New Albany, Pontotoc, Tupelo, Fulton, 
Charleston, Water Valley, Coffeeville, Bruce, Calhoun City, 
Houston, Okolona, Amory, Aberdeen, Tiptonville, Union City, 
Martin, Dresden, Paris, Dyersburg, Humboldt, Milan, Huntingdon, 
Camden, Ripley TN, Covington, Brownsville, Alamo, Jackson, 
Henderson, Lexington, Parsons, Decaturville, Bartlett, 
Germantown, Collierville, Memphis, Millington, Somerville, 
Oakland, Bolivar, Selmer, and Savannah
319 AM CDT Thu Jul 29 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM CDT THIS EVENING...

* WHAT...Heat index values up to 110 expected.

* WHERE...Portions of North Mississippi and East Arkansas.

* WHEN...From 10 AM to 8 PM CDT Thursday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
449 
WWUS74 KMEG 291517
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
1017 AM CDT Thu Jul 29 2021

ARZ058-MSZ007-010>012-020>024-292330-
/O.UPG.KMEG.HT.Y.0006.000000T0000Z-210730T0100Z/
/O.NEW.KMEG.EH.W.0001.210729T1517Z-210730T0100Z/
Phillips-Tunica-Coahoma-Quitman-Panola-Tallahatchie-Yalobusha-
Calhoun-Chickasaw-Monroe-
Including the cities of Helena, West Helena, Tunica, Clarksdale, 
Marks, Batesville, Charleston, Water Valley, Coffeeville, Bruce, 
Calhoun City, Houston, Okolona, Amory, and Aberdeen
1017 AM CDT Thu Jul 29 2021

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 8 PM CDT THIS EVENING...

* WHAT...Dangerously hot conditions with heat index values 110 and
  above.

* WHERE...In Mississippi, Tunica, Coahoma, Quitman, Panola, 
  Tallahatchie, Yalobusha, Calhoun, Chickasaw and Monroe 
  Counties. In Arkansas, Phillips County.

* WHEN...Until 8 PM CDT this evening.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

ARZ009-018-026>028-035-036-048-049-MOZ113-115-MSZ001>006-008-009-
013>017-TNZ001>004-019>022-048>055-088>092-292330-
/O.CON.KMEG.HT.Y.0006.000000T0000Z-210730T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
St. Francis-Lee AR-Dunklin-Pemiscot-DeSoto-Marshall-Benton MS-
Tippah-Alcorn-Tishomingo-Tate-Prentiss-Lafayette-Union-Pontotoc-
Lee MS-Itawamba-Lake-Obion-Weakley-Henry-Dyer-Gibson-Carroll-
Benton TN-Lauderdale-Tipton-Haywood-Crockett-Madison-Chester-
Henderson-Decatur-Shelby-Fayette-Hardeman-McNairy-Hardin-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, 
Marianna, Kennett, Caruthersville, Southaven, Olive Branch, 
Holly Springs, Ashland, Ripley MS, Corinth, Iuka, Senatobia, 
Booneville, Oxford, New Albany, Pontotoc, Tupelo, Fulton, 
Tiptonville, Union City, Martin, Dresden, Paris, Dyersburg, 
Humboldt, Milan, Huntingdon, Camden, Ripley TN, Covington, 
Brownsville, Alamo, Jackson, Henderson, Lexington, Parsons, 
Decaturville, Bartlett, Germantown, Collierville, Memphis, 
Millington, Somerville, Oakland, Bolivar, Selmer, and Savannah
1017 AM CDT Thu Jul 29 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING...

* WHAT...Heat index values up to 110 expected.

* WHERE...Portions of North Mississippi, West Tennessee, Missouri
  Bootheel and East Arkansas.

* WHEN...From 10 AM to 8 PM CDT Thursday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
801 
WWUS74 KMEG 291951
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
251 PM CDT Thu Jul 29 2021

ARZ058-MSZ007-010>012-020>024-300400-
/O.NEW.KMEG.EH.W.0002.210730T1500Z-210731T0100Z/
/O.CON.KMEG.EH.W.0001.000000T0000Z-210730T0100Z/
Phillips-Tunica-Coahoma-Quitman-Panola-Tallahatchie-Yalobusha-
Calhoun-Chickasaw-Monroe-
Including the cities of Helena, West Helena, Tunica, Clarksdale, 
Marks, Batesville, Charleston, Water Valley, Coffeeville, Bruce, 
Calhoun City, Houston, Okolona, Amory, and Aberdeen
251 PM CDT Thu Jul 29 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS
EVENING...
...EXCESSIVE HEAT WARNING IN EFFECT FROM 10 AM TO 8 PM CDT
FRIDAY...

* WHAT...Excessive Heat Warning, dangerously hot conditions with
  heat index values of 110 or greater.

* WHERE...In Mississippi, Tunica, Coahoma, Quitman, Panola, 
  Tallahatchie, Yalobusha, Calhoun, Chickasaw and Monroe 
  Counties. In Arkansas, Phillips County.

* WHEN...Excessive Heat Warning, until 8 PM CDT this evening and
  an Excessive Heat Warning, from 10 AM to 8 PM CDT Friday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

ARZ048-049-MSZ013-015>017-300400-
/O.NEW.KMEG.EH.W.0002.210730T1500Z-210731T0100Z/
/O.CON.KMEG.HT.Y.0006.000000T0000Z-210730T0100Z/
St. Francis-Lee AR-Lafayette-Pontotoc-Lee MS-Itawamba-
Including the cities of Forrest City, Marianna, Oxford, Pontotoc,
Tupelo, and Fulton
251 PM CDT Thu Jul 29 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING...
...EXCESSIVE HEAT WARNING IN EFFECT FROM 10 AM TO 8 PM CDT
FRIDAY...

* WHAT...For the Excessive Heat Warning, dangerously hot
  conditions with heat index values of 110 or greater. For the
  Heat Advisory, heat index values up to 109.

* WHERE...In Mississippi, Lafayette, Pontotoc, Lee MS and 
  Itawamba Counties. In Arkansas, St. Francis and Lee AR 
  Counties.

* WHEN...For the Excessive Heat Warning, from 10 AM to 8 PM CDT 
  Friday. For the Heat Advisory, until 8 PM CDT this evening.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

ARZ009-018-026>028-035-036-MOZ113-115-MSZ001>006-008-009-014-
TNZ001-019>021-048>055-088>092-300400-
/O.NEW.KMEG.HT.Y.0007.210730T1500Z-210731T0100Z/
/O.CON.KMEG.HT.Y.0006.000000T0000Z-210730T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
Dunklin-Pemiscot-DeSoto-Marshall-Benton MS-Tippah-Alcorn-
Tishomingo-Tate-Prentiss-Union-Lake-Dyer-Gibson-Carroll-
Lauderdale-Tipton-Haywood-Crockett-Madison-Chester-Henderson-
Decatur-Shelby-Fayette-Hardeman-McNairy-Hardin-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Kennett, 
Caruthersville, Southaven, Olive Branch, Holly Springs, Ashland, 
Ripley MS, Corinth, Iuka, Senatobia, Booneville, New Albany, 
Tiptonville, Dyersburg, Humboldt, Milan, Huntingdon, Ripley TN, 
Covington, Brownsville, Alamo, Jackson, Henderson, Lexington, 
Parsons, Decaturville, Bartlett, Germantown, Collierville, 
Memphis, Millington, Somerville, Oakland, Bolivar, Selmer, 
and Savannah
251 PM CDT Thu Jul 29 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING...
...HEAT ADVISORY IN EFFECT FROM 10 AM TO 8 PM CDT FRIDAY...

* WHAT...Heat Advisory, heat index values up to 109.

* WHERE...Portions of North Mississippi, West Tennessee, East 
  Arkansas and Southeast Missouri.

* WHEN...Heat Advisory, until 8 PM CDT this evening and a Heat 
  Advisory, from 10 AM to 8 PM CDT Friday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

TNZ002>004-022-300100-
/O.CON.KMEG.HT.Y.0006.000000T0000Z-210730T0100Z/
Obion-Weakley-Henry-Benton TN-
Including the cities of Union City, Martin, Dresden, Paris, 
and Camden
251 PM CDT Thu Jul 29 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING...

* WHAT...Heat index values up to 109.

* WHERE...Obion, Weakley, Henry and Benton TN Counties.

* WHEN...Until 8 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
843 
WWUS74 KMEG 300110
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
810 PM CDT Thu Jul 29 2021

ARZ058-MSZ007-010>012-020>024-300915-
/O.EXP.KMEG.EH.W.0001.000000T0000Z-210730T0100Z/
/O.CON.KMEG.EH.W.0002.210730T1500Z-210731T0100Z/
Phillips-Tunica-Coahoma-Quitman-Panola-Tallahatchie-Yalobusha-
Calhoun-Chickasaw-Monroe-
Including the cities of Helena, West Helena, Tunica, Clarksdale, 
Marks, Batesville, Charleston, Water Valley, Coffeeville, Bruce, 
Calhoun City, Houston, Okolona, Amory, and Aberdeen
810 PM CDT Thu Jul 29 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 10 AM TO 8 PM
CDT FRIDAY...
...EXCESSIVE HEAT WARNING HAS EXPIRED...

* WHAT...Dangerously hot conditions with heat index values up to 
  112 expected.

* WHERE...In Mississippi, Tunica, Coahoma, Quitman, Panola, 
  Tallahatchie, Yalobusha, Calhoun, Chickasaw and Monroe 
  Counties. In Arkansas, Phillips County.

* WHEN...From 10 AM to 8 PM CDT Friday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

ARZ048-049-MSZ013-015>017-300915-
/O.EXP.KMEG.HT.Y.0006.000000T0000Z-210730T0100Z/
/O.CON.KMEG.EH.W.0002.210730T1500Z-210731T0100Z/
St. Francis-Lee AR-Lafayette-Pontotoc-Lee MS-Itawamba-
Including the cities of Forrest City, Marianna, Oxford, Pontotoc,
Tupelo, and Fulton
810 PM CDT Thu Jul 29 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 10 AM TO 8 PM
CDT FRIDAY...
...HEAT ADVISORY HAS EXPIRED...

* WHAT...Dangerously hot conditions with heat index values up to
  112 expected.

* WHERE...In Mississippi, Lafayette, Pontotoc, Lee MS and 
  Itawamba Counties. In Arkansas, St. Francis and Lee AR 
  Counties.

* WHEN...From 10 AM to 8 PM CDT Friday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

ARZ009-018-026>028-035-036-MOZ113-115-MSZ001>006-008-009-014-
TNZ001-019>021-048>055-088>092-300915-
/O.EXP.KMEG.HT.Y.0006.000000T0000Z-210730T0100Z/
/O.CON.KMEG.HT.Y.0007.210730T1500Z-210731T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
Dunklin-Pemiscot-DeSoto-Marshall-Benton MS-Tippah-Alcorn-
Tishomingo-Tate-Prentiss-Union-Lake-Dyer-Gibson-Carroll-
Lauderdale-Tipton-Haywood-Crockett-Madison-Chester-Henderson-
Decatur-Shelby-Fayette-Hardeman-McNairy-Hardin-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Kennett, 
Caruthersville, Southaven, Olive Branch, Holly Springs, Ashland, 
Ripley MS, Corinth, Iuka, Senatobia, Booneville, New Albany, 
Tiptonville, Dyersburg, Humboldt, Milan, Huntingdon, Ripley TN, 
Covington, Brownsville, Alamo, Jackson, Henderson, Lexington, 
Parsons, Decaturville, Bartlett, Germantown, Collierville, 
Memphis, Millington, Somerville, Oakland, Bolivar, Selmer, 
and Savannah
810 PM CDT Thu Jul 29 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM CDT
FRIDAY...
...HEAT ADVISORY HAS EXPIRED...

* WHAT...Heat index values up to 109 expected.

* WHERE...Portions of North Mississippi, West Tennessee, East 
  Arkansas and Southeast Missouri.

* WHEN...From 10 AM to 8 PM CDT Friday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

TNZ002>004-022-300215-
/O.EXP.KMEG.HT.Y.0006.000000T0000Z-210730T0100Z/
Obion-Weakley-Henry-Benton TN-
Including the cities of Union City, Martin, Dresden, Paris, 
and Camden
810 PM CDT Thu Jul 29 2021

...HEAT ADVISORY HAS EXPIRED...

Heat indices will not meet advisory criteria therefore the Heat
Advisory is allowed to expire.

$$

What forecasters said that day

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

NWS Memphis, TN wrote its last area forecast discussion before this heat advisory went out at Jul 28, 2:25 PM CDT, 13 minutes earlier.

Area forecast discussion, Jul 28, 2:25 PM CDT, 13 minutes before
Area Forecast Discussion
National Weather Service Memphis TN
225 PM CDT Wed Jul 28 2021

.DISCUSSION...

The heat is on! A heat advisory is currently in effect for
portions of North MS and northeast AR until 7PM this evening.
Current temperatures are in the 90s with dewpoints in the
low/middle 70s. Overall, heat indices are not as high as they
were yesterday but there are still readings ranging from 100-107F
already. Overnight, temperatures will lower into the 70s. Given
the presence of surface high pressure across the region, rain free
conditions are expected until the weekend.

Despite dry conditions, we expect the heat to stick around through
the remainder of the workweek. Highs Thursday and Friday will be
in the upper 90s (approaching 100F) with dewpoints still in the
70s. Will go with another Heat Advisory for the entire Mid-South
on Thursday. Will hold off on issuing for Friday.

Northwest flow will return by the weekend as the upper level
pattern amplifies to our west and our east. During the weekend a
cold front will travel south towards the MS Valley region. This
will result in rain returning to the forecast late Saturday into
early next week. Behind the front, we will have a nice cool down.
High temperatures will be in the 80s with dewpoints in the 60s!
Anybody ready for that?!

17

&&

.AVIATION...
18Z TAF cycle

VFR through the period. Winds 5 kts or less...becoming nearly calm
overnight. Light MVFR fog possible again at MKL and TUP overnight.

AC3

&&

.MEG WATCHES/WARNINGS/ADVISORIES...
AR...Heat Advisory until 7 PM CDT this evening for Lee AR-Phillips.

MO...None.
MS...Heat Advisory until 7 PM CDT this evening for Calhoun-Chickasaw-
     Coahoma-Itawamba-Lafayette-Lee MS-Monroe-Panola-Pontotoc-
     Quitman-Tallahatchie-Tunica-Yalobusha.

TN...None.
&&
Hazardous weather outlook, Jul 28, 3:14 AM CDT, 11 hours 24 minutes before
Hazardous Weather Outlook
National Weather Service Memphis TN
314 AM CDT Wed Jul 28 2021

ARZ009-018-026>028-035-036-048-049-058-MOZ113-115-MSZ001>017-
020>024-TNZ001>004-019>022-048>055-088>092-291015-
Alcorn-Benton MS-Benton TN-Calhoun-Carroll-Chester-Chickasaw-Clay-
Coahoma-Craighead-Crittenden-Crockett-Cross-DeSoto-Decatur-
Dunklin-Dyer-Fayette-Gibson-Greene-Hardeman-Hardin-Haywood-
Henderson-Henry-Itawamba-Lafayette-Lake-Lauderdale-Lee AR-Lee MS-
Madison-Marshall-McNairy-Mississippi-Monroe-Obion-Panola-Pemiscot-
Phillips-Poinsett-Pontotoc-Prentiss-Quitman-Shelby-St. Francis-
Tallahatchie-Tate-Tippah-Tipton-Tishomingo-Tunica-Union-Weakley-
Yalobusha-
314 AM CDT Wed Jul 28 2021

This hazardous weather outlook is for portions of East Arkansas...
the Missouri Bootheel...North Mississippi...and West Tennessee.

.DAY ONE...Today and Tonight

A Heat Advisory is in effect until 7 PM this evening for portions
East Arkansas and North Mississippi. Heat index values up to 109
possible.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Hot and humid conditions will continue the rest of the week. Heat
advisories may be needed. For the weekend into next week we look
to cool down slightly below heat advisory criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

Nearby

Heat Advisories in Mississippi, 2021Heat Advisories in Tennessee, 2021Heat Advisories in Arkansas, 2021Every heat 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.