Alert archive / Mississippi / Excessive Heat Warnings in 2021

Excessive Heat Warning 5, NWS Memphis, TN

August 23, 2021Coahoma County, Quitman County, Tallahatchie County, Mississippi; Phillips County, Arkansas

NWS Memphis, TN issued this excessive heat warning at Aug 23, 2021, 3:09 AM CDT for Coahoma County, Quitman County, Tallahatchie County, Mississippi; Phillips County, Arkansas. It took effect at Aug 24, 2021, 11:00 AM CDT. It was in force for 9 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
Aug 23, 2021, 3:09 AM CDT (08:09 UTC)
In effect from
Aug 24, 2021, 11:00 AM CDT
Expired
Aug 24, 2021, 7:50 PM CDT
In force
9 hr
Issued by
NWS Memphis, TN

Counties Phillips County, AR, Coahoma County, MS, Quitman County, MS, Tallahatchie County, MS

The radar

The Memphis radar (KNQA), 137 km from the middle of the area, began a volume at 08:15 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, 8.2 hours before the alert went out and 84 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 00:00Z on 2021-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1843 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 00:00Z on 2021-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
1843 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
1364 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

277 
WWUS74 KMEG 230809
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
309 AM CDT Mon Aug 23 2021

ARZ058-MSZ010-011-020-231615-
/O.NEW.KMEG.EH.W.0005.210824T1600Z-210825T0100Z/
/O.CON.KMEG.EH.W.0004.210823T1600Z-210824T0100Z/
Phillips-Coahoma-Quitman-Tallahatchie-
Including the cities of Helena, West Helena, Clarksdale, Marks, 
and Charleston
309 AM CDT Mon Aug 23 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM THIS
MORNING TO 8 PM CDT THIS EVENING...
...EXCESSIVE HEAT WARNING IN EFFECT FROM 11 AM TO 8 PM CDT
TUESDAY...

* WHAT...Dangerously hot conditions with heat index values of 108
  to 113 degrees.

* WHERE...In Mississippi, Coahoma, Quitman and Tallahatchie 
  Counties. In Arkansas, Phillips County.

* WHEN...For the Excessive Heat Warning, from 11 AM this morning 
  to 8 PM CDT this evening. For the Excessive Heat Warning, from 
  11 AM to 8 PM CDT Tuesday.

* 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.

&&

$$

ARZ009-018-026>028-035-036-048-049-MOZ113-115-MSZ001-007-008-012-
TNZ001-002-019-048-049-088-231615-
/O.NEW.KMEG.HT.Y.0014.210824T1600Z-210825T0100Z/
/O.CON.KMEG.HT.Y.0013.210823T1600Z-210824T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
St. Francis-Lee AR-Dunklin-Pemiscot-DeSoto-Tunica-Tate-Panola-
Lake-Obion-Dyer-Lauderdale-Tipton-Shelby-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, 
Marianna, Kennett, Caruthersville, Southaven, Olive Branch, 
Tunica, Senatobia, Batesville, Tiptonville, Union City, 
Dyersburg, Ripley TN, Covington, Bartlett, Germantown, 
Collierville, Memphis, and Millington
309 AM CDT Mon Aug 23 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
8 PM CDT THIS EVENING...
...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM CDT TUESDAY...

* WHAT...Heat index values 103 to 108.

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

* WHEN...For the Heat Advisory, from 11 AM this morning to 8 PM 
  CDT this evening. For the Heat Advisory, from 11 AM to 8 PM 
  CDT Tuesday.

* 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.

&&

$$

MSZ021-231615-
/O.NEW.KMEG.HT.Y.0014.210824T1600Z-210825T0100Z/
/O.EXA.KMEG.HT.Y.0013.210823T1600Z-210824T0100Z/
Yalobusha-
Including the cities of Water Valley and Coffeeville
309 AM CDT Mon Aug 23 2021

...HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 8 PM CDT
THIS EVENING...
...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM CDT TUESDAY...

* WHAT...Heat index values 103 to 108.

* WHERE...Yalobusha County.

* WHEN...For the Heat Advisory, from 11 AM this morning to 8 PM 
  CDT this evening. For the Heat Advisory, from 11 AM to 8 PM 
  CDT Tuesday.

* 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.

&&

$$

PWB
7 follow-up statements
714 
WWUS74 KMEG 231205 AAA
NPWMEG

URGENT - WEATHER MESSAGE...UPDATED
National Weather Service Memphis TN
705 AM CDT Mon Aug 23 2021

ARZ058-MSZ010-011-020-232100-
/O.CON.KMEG.EH.W.0004.210823T1600Z-210824T0100Z/
/O.CON.KMEG.EH.W.0005.210824T1600Z-210825T0100Z/
Phillips-Coahoma-Quitman-Tallahatchie-
Including the cities of Helena, West Helena, Clarksdale, Marks, 
and Charleston
705 AM CDT Mon Aug 23 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM THIS
MORNING TO 8 PM CDT THIS EVENING...
...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM
CDT TUESDAY...

* WHAT...Dangerously hot conditions with heat index values of 108
  to 113 degrees.

* WHERE...In Mississippi, Quitman, Tallahatchie and Coahoma 
  Counties. In Arkansas, Phillips County.

* WHEN...For the Excessive Heat Warning, from 11 AM this morning 
  to 8 PM CDT this evening. For the Excessive Heat Warning, from 
  11 AM to 8 PM CDT Tuesday.

* 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.

&&

$$

ARZ009-018-026>028-035-036-048-049-MOZ113-115-MSZ001-007-008-012-
021-TNZ001-002-019-048-049-088-232100-
/O.CON.KMEG.HT.Y.0013.210823T1600Z-210824T0100Z/
/O.CON.KMEG.HT.Y.0014.210824T1600Z-210825T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
St. Francis-Lee AR-Dunklin-Pemiscot-DeSoto-Tunica-Tate-Panola-
Yalobusha-Lake-Obion-Dyer-Lauderdale-Tipton-Shelby-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, 
Marianna, Kennett, Caruthersville, Southaven, Olive Branch, 
Tunica, Senatobia, Batesville, Water Valley, Coffeeville, 
Tiptonville, Union City, Dyersburg, Ripley TN, Covington, 
Bartlett, Germantown, Collierville, Memphis, and Millington
705 AM CDT Mon Aug 23 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
8 PM CDT THIS EVENING...
...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 8 PM CDT
TUESDAY...

* WHAT...Heat index values 103 to 108.

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

* WHEN...For the Heat Advisory, from 11 AM this morning to 8 PM 
  CDT this evening. For the Heat Advisory, from 11 AM to 8 PM 
  CDT Tuesday.

* 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.

&&

$$

PWB
287 
WWUS74 KMEG 232010
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
310 PM CDT Mon Aug 23 2021

ARZ058-MSZ010-011-020-240415-
/O.CON.KMEG.EH.W.0004.000000T0000Z-210824T0100Z/
/O.CON.KMEG.EH.W.0005.210824T1600Z-210825T0100Z/
Phillips-Coahoma-Quitman-Tallahatchie-
Including the cities of Helena, West Helena, Clarksdale, Marks, 
and Charleston
310 PM CDT Mon Aug 23 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS
EVENING...
...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM
CDT TUESDAY...

* WHAT...Dangerously hot conditions with heat index values of 
  108 to 113 degrees.

* WHERE...In Mississippi, Quitman, Tallahatchie and Coahoma 
  Counties. In Arkansas, Phillips County.

* WHEN...Through 8 PM CDT this evening, and again from 11 AM to 8
  PM CDT Tuesday.

* 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-MSZ001-007-008-012-
021-TNZ001-002-019-048-049-088-240415-
/O.CON.KMEG.HT.Y.0013.000000T0000Z-210824T0100Z/
/O.CON.KMEG.HT.Y.0014.210824T1600Z-210825T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
St. Francis-Lee AR-Dunklin-Pemiscot-DeSoto-Tunica-Tate-Panola-
Yalobusha-Lake-Obion-Dyer-Lauderdale-Tipton-Shelby-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, 
Marianna, Kennett, Caruthersville, Southaven, Olive Branch, 
Tunica, Senatobia, Batesville, Water Valley, Coffeeville, 
Tiptonville, Union City, Dyersburg, Ripley TN, Covington, 
Bartlett, Germantown, Collierville, Memphis, and Millington
310 PM CDT Mon Aug 23 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING...
...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 8 PM CDT
TUESDAY...

* WHAT...Heat index values 103 to 108.

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

* WHEN...Through 8 PM CDT this evening and again from 11 AM to 8 
  PM CDT Tuesday.

* 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.

&&

$$
951 
WWUS74 KMEG 240055
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
755 PM CDT Mon Aug 23 2021

ARZ058-MSZ010-011-020-240900-
/O.CAN.KMEG.EH.W.0004.000000T0000Z-210824T0100Z/
/O.CON.KMEG.EH.W.0005.210824T1600Z-210825T0100Z/
Phillips-Coahoma-Quitman-Tallahatchie-
Including the cities of Helena, West Helena, Clarksdale, Marks, 
and Charleston
755 PM CDT Mon Aug 23 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM
CDT TUESDAY...
...THE EXCESSIVE HEAT WARNING FOR TODAY WILL BE ALLOWED TO EXPIRE
ON TIME AT 8 PM...

* WHAT...Dangerously hot conditions with heat index values of 
  108 to 113 degrees.

* WHERE...In Mississippi, Quitman, Tallahatchie and Coahoma 
  Counties. In Arkansas, Phillips County.

* WHEN...From 11 AM to 8 PM CDT Tuesday.

* 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.

&&

$$

ARZ009-018-026>028-035-036-048-049-MOZ113-115-MSZ001-007-008-012-
021-TNZ001-002-019-048-049-088-240900-
/O.CAN.KMEG.HT.Y.0013.000000T0000Z-210824T0100Z/
/O.CON.KMEG.HT.Y.0014.210824T1600Z-210825T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
St. Francis-Lee AR-Dunklin-Pemiscot-DeSoto-Tunica-Tate-Panola-
Yalobusha-Lake-Obion-Dyer-Lauderdale-Tipton-Shelby-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, 
Marianna, Kennett, Caruthersville, Southaven, Olive Branch, 
Tunica, Senatobia, Batesville, Water Valley, Coffeeville, 
Tiptonville, Union City, Dyersburg, Ripley TN, Covington, 
Bartlett, Germantown, Collierville, Memphis, and Millington
755 PM CDT Mon Aug 23 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 8 PM CDT
TUESDAY...
...THE HEAT ADVISORY FOR TODAY WILL BE ALLOWED TO EXPIRE ON TIME
AT 8 PM...

* WHAT...Heat index values 103 to 108.

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

* WHEN...From 11 AM to 8 PM CDT Tuesday.

* 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.

&&

$$
032 
WWUS74 KMEG 240133
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
833 PM CDT Mon Aug 23 2021

ARZ058-MSZ010-011-020-241100-
/O.CON.KMEG.EH.W.0005.210824T1600Z-210825T0100Z/
Phillips-Coahoma-Quitman-Tallahatchie-
Including the cities of Helena, West Helena, Clarksdale, Marks, 
and Charleston
833 PM CDT Mon Aug 23 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM
CDT TUESDAY...

* WHAT...Dangerously hot conditions with heat index values of 
  108 to 113 degrees.

* WHERE...In Mississippi, Quitman, Tallahatchie and Coahoma 
  Counties. In Arkansas, Phillips County.

* WHEN...From 11 AM to 8 PM CDT Tuesday.

* 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.

&&

$$

ARZ009-018-026>028-035-036-048-049-MOZ113-115-MSZ001-007-008-012-
021-TNZ001-002-019-048-049-088-241100-
/O.CON.KMEG.HT.Y.0014.210824T1600Z-210825T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
St. Francis-Lee AR-Dunklin-Pemiscot-DeSoto-Tunica-Tate-Panola-
Yalobusha-Lake-Obion-Dyer-Lauderdale-Tipton-Shelby-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, 
Marianna, Kennett, Caruthersville, Southaven, Olive Branch, 
Tunica, Senatobia, Batesville, Water Valley, Coffeeville, 
Tiptonville, Union City, Dyersburg, Ripley TN, Covington, 
Bartlett, Germantown, Collierville, Memphis, and Millington
833 PM CDT Mon Aug 23 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 8 PM CDT
TUESDAY...

* WHAT...Heat index values 103 to 108.

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

* WHEN...From 11 AM to 8 PM CDT Tuesday.

* 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.

&&

$$
721 
WWUS74 KMEG 240950
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
450 AM CDT Tue Aug 24 2021

ARZ058-MSZ010-011-020-242100-
/O.CON.KMEG.EH.W.0005.210824T1600Z-210825T0100Z/
Phillips-Coahoma-Quitman-Tallahatchie-
Including the cities of Helena, West Helena, Clarksdale, Marks, 
and Charleston
450 AM CDT Tue Aug 24 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM THIS
MORNING TO 8 PM CDT THIS EVENING...

* WHAT...Dangerously hot conditions with heat index values of 
  108 to 113 degrees.

* WHERE...In Mississippi, Quitman, Tallahatchie and Coahoma 
  Counties. In Arkansas, Phillips County.

* WHEN...From 11 AM to 8 PM CDT Tuesday.

* 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-MSZ001-007-008-012-
021-TNZ001-002-019-048-049-088-242100-
/O.CON.KMEG.HT.Y.0014.210824T1600Z-210825T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
St. Francis-Lee AR-Dunklin-Pemiscot-DeSoto-Tunica-Tate-Panola-
Yalobusha-Lake-Obion-Dyer-Lauderdale-Tipton-Shelby-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, 
Marianna, Kennett, Caruthersville, Southaven, Olive Branch, 
Tunica, Senatobia, Batesville, Water Valley, Coffeeville, 
Tiptonville, Union City, Dyersburg, Ripley TN, Covington, 
Bartlett, Germantown, Collierville, Memphis, and Millington
450 AM CDT Tue Aug 24 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
8 PM CDT THIS EVENING...

* WHAT...Heat index values 103 to 108.

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

* WHEN...From 11 AM to 8 PM CDT Tuesday.

* 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.

&&

$$
878 
WWUS74 KMEG 242007
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
307 PM CDT Tue Aug 24 2021

ARZ058-MSZ010-011-020-250415-
/O.NEW.KMEG.HT.Y.0015.210825T1600Z-210826T0100Z/
/O.CON.KMEG.EH.W.0005.000000T0000Z-210825T0100Z/
Phillips-Coahoma-Quitman-Tallahatchie-
Including the cities of Helena, West Helena, Clarksdale, Marks, 
and Charleston
307 PM CDT Tue Aug 24 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS
EVENING...
...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM CDT WEDNESDAY...

* WHAT...For the Excessive Heat Warning, dangerously hot
  conditions with heat index values up to 111. For the Heat
  Advisory, heat index values up to 109 expected.

* WHERE...In Mississippi, Coahoma, Quitman and Tallahatchie 
  Counties. In Arkansas, Phillips County.

* WHEN...The Excessive Heat Warning is in effect through 8 PM CDT
  this evening. The Heat Advisory is in effect from 11 AM to 8 PM
  CDT Wednesday.

* 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-MSZ001-007-008-012-
021-TNZ001-002-019-048-049-088-250415-
/O.NEW.KMEG.HT.Y.0015.210825T1600Z-210826T0100Z/
/O.CON.KMEG.HT.Y.0014.000000T0000Z-210825T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
St. Francis-Lee AR-Dunklin-Pemiscot-DeSoto-Tunica-Tate-Panola-
Yalobusha-Lake-Obion-Dyer-Lauderdale-Tipton-Shelby-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, 
Marianna, Kennett, Caruthersville, Southaven, Olive Branch, 
Tunica, Senatobia, Batesville, Water Valley, Coffeeville, 
Tiptonville, Union City, Dyersburg, Ripley TN, Covington, 
Bartlett, Germantown, Collierville, Memphis, and Millington
307 PM CDT Tue Aug 24 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING...
...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM CDT WEDNESDAY...

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

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

* WHEN...Through 8 PM CDT this evening, and again from 11 AM to 8
  PM CDT Wednesday.

* 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.

&&

$$
054 
WWUS74 KMEG 250050
NPWMEG

URGENT - WEATHER MESSAGE
National Weather Service Memphis TN
750 PM CDT Tue Aug 24 2021

ARZ058-MSZ010-011-020-250900-
/O.CAN.KMEG.EH.W.0005.000000T0000Z-210825T0100Z/
/O.CON.KMEG.HT.Y.0015.210825T1600Z-210826T0100Z/
Phillips-Coahoma-Quitman-Tallahatchie-
Including the cities of Helena, West Helena, Clarksdale, Marks, 
and Charleston
750 PM CDT Tue Aug 24 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 8 PM CDT
WEDNESDAY...
...THE EXCESSIVE HEAT WARNING FOR TODAY WILL BE ALLOWED TO EXPIRE
ON TIME AT 8 PM...

* WHAT...For the Excessive Heat Warning, dangerously hot 
  conditions with heat index values up to 111. For the Heat 
  Advisory, heat index values up to 109 expected.

* WHERE...In Mississippi, Quitman, Tallahatchie and Coahoma 
  Counties. In Arkansas, Phillips County.

* WHEN...From 11 AM to 8 PM CDT Wednesday.

* 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.

&&

$$

ARZ009-018-026>028-035-036-048-049-MOZ113-115-MSZ001-007-008-012-
021-TNZ001-002-019-048-049-088-250900-
/O.CAN.KMEG.HT.Y.0014.000000T0000Z-210825T0100Z/
/O.CON.KMEG.HT.Y.0015.210825T1600Z-210826T0100Z/
Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden-
St. Francis-Lee AR-Dunklin-Pemiscot-DeSoto-Tunica-Tate-Panola-
Yalobusha-Lake-Obion-Dyer-Lauderdale-Tipton-Shelby-
Including the cities of Piggott, Corning, Paragould, Jonesboro, 
Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, 
Marianna, Kennett, Caruthersville, Southaven, Olive Branch, 
Tunica, Senatobia, Batesville, Water Valley, Coffeeville, 
Tiptonville, Union City, Dyersburg, Ripley TN, Covington, 
Bartlett, Germantown, Collierville, Memphis, and Millington
750 PM CDT Tue Aug 24 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 8 PM CDT
WEDNESDAY...
...THE HEAT ADVISORY FOR TODAY WILL BE ALLOWED TO EXPIRE ON TIME
AT 8 PM...

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

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

* WHEN...From 11 AM to 8 PM CDT Wednesday.

* 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.

&&

$$

What forecasters said that day

The local office's own words before this excessive heat warning 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 excessive heat warning went out at Aug 23, 12:25 AM CDT, 2 hours 44 minutes earlier.

Area forecast discussion, Aug 23, 12:25 AM CDT, 2 hours 44 minutes before
Area Forecast Discussion
National Weather Service Memphis TN
1225 AM CDT Mon Aug 23 2021

.UPDATE...

06Z Aviation Update Below

&&

.PREV DISCUSSION... /issued 750 PM CDT Sun Aug 22 2021/

UPDATE...Evening Update and Aviation Discussion.

DISCUSSION...

Updated to remove the Heat Advisory for this evening. A heat
advisory and Excessive heat warning has been issued for portions
of the Midsouth tomorrow and will likely be needed through at
least Wednesday.

PREV DISCUSSION... /issued 338 PM CDT Sun Aug 22 2021/

DISCUSSION...
Hot and mostly dry conditions will should be expected over the
first half of the week. A few showers and storms will be possible
Monday along and west of the Mississippi River. A Heat Advisory
and Excessive Heat Warning has been issued for portions of the
forecast area for Monday. We expect heat indices to be in the 105
to 112 range over the advised/warned areas. Expect the trend of
the heat advisory to continue through at least Wednesday as the
upper ridge maintains its hold over the region. As we get later
into the week...the ridge starts to weaken some and rain chances
increase and temperatures will moderate. Expect daily rain chances
of 20 to 30 percent to be the rule. Also an easterly wave is
expected to move across the southeast to help enhance POPs in the
latter half of the week going into the weekend. All in all a
typical summertime pattern is expected for the Mid South.

&&

.AVIATION...
06Z TAF

Mostly VFR conditions expected through the TAF cycle. Some MVFR
conditions possible with fog development at MKL, JBR and TUP. Wind
will be light and variable.

SMW

&&

.MEG WATCHES/WARNINGS/ADVISORIES...
AR...Excessive Heat Warning from 11 AM this morning to 8 PM CDT this
     evening for Phillips.

     Heat Advisory from 11 AM this morning to 8 PM CDT this evening
     for Clay-Craighead-Crittenden-Cross-Greene-Lee AR-
     Mississippi-Poinsett-St. Francis.

MO...Heat Advisory from 11 AM this morning to 8 PM CDT this evening
     for Dunklin-Pemiscot.

MS...Excessive Heat Warning from 11 AM this morning to 8 PM CDT this
     evening for Coahoma-Quitman-Tallahatchie.

     Heat Advisory from 11 AM this morning to 8 PM CDT this evening
     for DeSoto-Panola-Tate-Tunica.

TN...Heat Advisory from 11 AM this morning to 8 PM CDT this evening
     for Dyer-Lake-Lauderdale-Obion-Shelby-Tipton.

&&
Hazardous weather outlook, Aug 22, 7:50 PM CDT, 7 hours 19 minutes before
Hazardous Weather Outlook
National Weather Service Memphis TN
750 PM CDT Sun Aug 22 2021

ARZ009-018-026>028-035-036-048-049-058-MOZ113-115-MSZ001>017-
020>024-TNZ001>004-019>022-048>055-088>092-240300-
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-
750 PM CDT Sun Aug 22 2021

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

.DAY ONE...Tonight

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Hot and humid conditions will prevail across much of the Mid-
South Monday through Wednesday. Heat index values are forecast to
reach or exceed 105 degrees in many areas. Heat Advisories will
likely be needed during this period.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 3:09 AM CDTHeat AdvisoryMEGDeSoto, Panola, Tate, Tunica, Yalobusha41 hr

Nearby

Excessive Heat Warnings in Mississippi, 2021Excessive Heat Warnings in Arkansas, 2021Every excessive heat 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.