Excessive Heat and Heat in Mississippi, August 11 to 14, 2023

Name: Excessive Heat and Heat in Mississippi, August 11 to 14, 2023
Start: 2023-08-11T10:00
End: 2023-08-14T17:00
Location: Mississippi

August 11 to 14, 2023 · NWS MEG · 66 events in 22 counties and zones

Another heat wave impacted the region as the result of a building ridge over east Texas and Louisiana. Heat index values reached or exceeded 105 degrees.

Where it happened

Every event with a place to put it; 66 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

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Fire, smoke and dust
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The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 66

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS MEG wrote it up.

Another heat wave impacted the region as the result of a building ridge over east Texas and Louisiana. Heat index values reached or exceeded 105 degrees.

What forecasters said that day

The local office's own words before the first event, 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 the first event at Aug 11, 5:10 AM CST, 4 hours 50 minutes earlier.

Area forecast discussion, Aug 11, 5:10 AM CST, 4 hours 50 minutes before

Area Forecast Discussion
National Weather Service Memphis TN
610 AM CDT Fri Aug 11 2023

...New AVIATION...

.SYNOPSIS...
Issued at 249 AM CDT Fri Aug 11 2023

Today through the weekend, excessive rain and thunderstorms
should not be as widespread as we have seen for the past few days,
but August heat is returning. We will likely need Heat Advisories
and possibly Excessive Heat Warnings through the weekend and
maybe on Monday before cooler temperatures return to the Midsouth.
We should see mostly dry conditions Tuesday through Friday with
high temperatures in the middle 80s to low 90s.

&&

.DISCUSSION...
(Today through Thursday) Issued at 249 AM CDT Fri Aug 11 2023

Abundant ground moisture from recent heavy rain, light wind, and
mainly clear skies above ~2,000 feet have resulted in prime
conditions for fog across the Midsouth. Visibilities below 1/4 of
a mile have already been observed at many locations and will
likely only become more widespread through sunrise. A Dense Fog
Advisory has been issues for most of the Midsouth and may need to
be expanded area wide now that clouds have moved out of northeast
Mississippi. After sunrise, fog and low clouds should dissipate
quickly and temperatures will skyrocket. A Heat Advisory has been
issued for east Arkansas, the Missouri Bootheel, Shelby county
Tennessee, and portions of north Mississippi. Heat indices may
approach 110 degrees.

We remain under weak northwest flow with a ridge building over
east Texas and Louisiana. The strengthening ridge will result in
much warmer conditions today through the weekend. Today should be
mostly dry, but we may still see a round or two of thunderstorms.
Thunderstorms should be mainly mainly confined to northern and
especially northeastern portions of the Midsouth tonight, Saturday
and Sunday as weak impulses track across Missouri and northern
portions of west Tennessee. A few strong to severe thunderstorms
are possible, but widespread hazardous conditions are not
expected. The higher likelihood of severe thunderstorms should
remain to our north where shear is stronger. The primary threat
for any severe storms in the Midsouth would be from damaging wind
and large hail today through the weekend.

Sunday into Monday, a deep midlevel trough will track out of the
northern Rockies and across the central Plains. This feature will
become oriented from the Great Lakes into the southern Plains by
Midday Monday. At the surface, an attendant cold front will move
quickly across the Midsouth on Monday. We could still see heat
advisory conditions(105-109 heat index) in north Mississippi and
east central Arkansas Monday afternoon ahead of the front, but
cooler conditions should arrive to all of the Midsouth by Tuesday.

Several days of mostly dry conditions is expected next week
beginning Tuesday. Below normal temperatures are expected Tuesday
and Wednesday. Expect highs mostly in the 80s and lows in the 60s.
As the ridge restrengthens to our southwest, gradual warming will
take place Thursday and Friday with high temperatures returning to
the 90s.

30/Sirmon

&&

.AVIATION...
(12Z TAFS)
Issued at 610 AM CDT Fri Aug 11 2023

Widespread FG, BR, and low CIGS start this period with LIFR
conditions. Gradual improvement will occur near sunrise before
lifting to VFR after sunrise. All sites should reach VFR status by
18z at the latest. Winds will be on the lighter side today
shifting back to NW flow 7 kts or less. There is a chance for
pop up showers and thunderstorms, but no direct impacts to the
terminals. Guidance was hinting at TUP having another round of BR
conditions tomorrow night.

DNM

&&

.MEG WATCHES/WARNINGS/ADVISORIES...
AR...Dense Fog Advisory until 8 AM CDT this morning for ARZ009-018-
     026>028-035-036-048-049-058.

     Heat Advisory from noon today to 8 PM CDT this evening for
     ARZ009-018-026>028-035-036-048-049-058.

MO...Dense Fog Advisory until 8 AM CDT this morning for MOZ113-115.

     Heat Advisory from noon today to 8 PM CDT this evening for
     MOZ113-115.

MS...Dense Fog Advisory until 8 AM CDT this morning for MSZ001>017-
     020>024.

     Heat Advisory from noon today to 8 PM CDT this evening for
     MSZ001-007-008-010>012-016-017-020>024.

TN...Dense Fog Advisory until 8 AM CDT this morning for TNZ001>004-
     019>022-048>055-088>092.

     Heat Advisory from noon today to 8 PM CDT this evening for
     TNZ088.

&&

PUBLIC FORECAST...JDS
AVIATION...DNM

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

38 excessive heat, 28 heat. Local standard time, as filed.

Heat, Alcorn

When: August 11, 10:00 AM CST to 7:00 PM CST
Where: Alcorn forecast zone
Reported by: AWOS
Coordinates: 34.881, -88.580 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Tippah

When: August 11, 10:00 AM CST to 7:00 PM CST
Where: Tippah forecast zone
Reported by: AWOS
Coordinates: 34.768, -88.909 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Tishomingo

When: August 11, 10:00 AM CST to 7:00 PM CST
Where: Tishomingo forecast zone
Reported by: AWOS
Coordinates: 34.740, -88.239 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Prentiss

When: August 11, 10:00 AM CST to 7:00 PM CST
Where: Prentiss forecast zone
Reported by: AWOS
Coordinates: 34.618, -88.520 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Excessive Heat, Coahoma

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Coahoma forecast zone
Reported by: AWOS
Coordinates: 34.229, -90.603 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Tunica

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Tunica forecast zone
Reported by: AWOS
Coordinates: 34.652, -90.375 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, De Soto

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: De Soto forecast zone
Reported by: AWOS
Coordinates: 34.875, -89.992 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Tate

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Tate forecast zone
Reported by: AWOS
Coordinates: 34.650, -89.945 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Quitman

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Quitman forecast zone
Reported by: AWOS
Coordinates: 34.251, -90.289 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Tallahatchie

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Tallahatchie forecast zone
Reported by: AWOS
Coordinates: 33.951, -90.173 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Yalobusha

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Yalobusha forecast zone
Reported by: AWOS
Coordinates: 34.028, -89.708 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Panola

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Panola forecast zone
Reported by: AWOS
Coordinates: 34.364, -89.951 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Lafayette

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Lafayette forecast zone
Reported by: AWOS
Coordinates: 34.357, -89.485 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Marshall

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Marshall forecast zone
Reported by: AWOS
Coordinates: 34.762, -89.503 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Benton

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Benton forecast zone
Reported by: AWOS
Coordinates: 34.817, -89.188 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Union

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Union forecast zone
Reported by: AWOS
Coordinates: 34.491, -89.004 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Pontotoc

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Pontotoc forecast zone
Reported by: AWOS
Coordinates: 34.225, -89.037 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Calhoun

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Calhoun forecast zone
Reported by: AWOS
Coordinates: 33.937, -89.336 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Chickasaw

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Chickasaw forecast zone
Reported by: AWOS
Coordinates: 33.921, -88.948 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Monroe

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Monroe forecast zone
Reported by: AWOS
Coordinates: 33.892, -88.480 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Itawamba

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Itawamba forecast zone
Reported by: AWOS
Coordinates: 34.280, -88.361 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Lee

When: August 11, 1:00 PM CST to 7:00 PM CST
Where: Lee forecast zone
Reported by: ASOS
Coordinates: 34.290, -88.680 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Tunica

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Tunica forecast zone
Reported by: AWOS
Coordinates: 34.652, -90.375 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Coahoma

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Coahoma forecast zone
Reported by: AWOS
Coordinates: 34.229, -90.603 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Quitman

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Quitman forecast zone
Reported by: AWOS
Coordinates: 34.251, -90.289 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Tallahatchie

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Tallahatchie forecast zone
Reported by: AWOS
Coordinates: 33.951, -90.173 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Yalobusha

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Yalobusha forecast zone
Reported by: AWOS
Coordinates: 34.028, -89.708 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Calhoun

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Calhoun forecast zone
Reported by: AWOS
Coordinates: 33.937, -89.336 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Chickasaw

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Chickasaw forecast zone
Reported by: AWOS
Coordinates: 33.921, -88.948 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Monroe

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Monroe forecast zone
Reported by: AWOS
Coordinates: 33.892, -88.480 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Heat, De Soto

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: De Soto forecast zone
Reported by: AWOS
Coordinates: 34.875, -89.992 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Tate

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Tate forecast zone
Reported by: AWOS
Coordinates: 34.650, -89.945 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Panola

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Panola forecast zone
Reported by: AWOS
Coordinates: 34.364, -89.951 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Marshall

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Marshall forecast zone
Reported by: AWOS
Coordinates: 34.762, -89.503 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Lafayette

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Lafayette forecast zone
Reported by: AWOS
Coordinates: 34.357, -89.485 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Benton

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Benton forecast zone
Reported by: AWOS
Coordinates: 34.817, -89.188 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Union

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Union forecast zone
Reported by: AWOS
Coordinates: 34.491, -89.004 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Pontotoc

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Pontotoc forecast zone
Reported by: AWOS
Coordinates: 34.225, -89.037 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Tippah

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Tippah forecast zone
Reported by: AWOS
Coordinates: 34.768, -88.909 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Alcorn

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Alcorn forecast zone
Reported by: AWOS
Coordinates: 34.881, -88.580 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Prentiss

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Prentiss forecast zone
Reported by: AWOS
Coordinates: 34.618, -88.520 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Tishomingo

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Tishomingo forecast zone
Reported by: AWOS
Coordinates: 34.740, -88.239 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Itawamba

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Itawamba forecast zone
Reported by: AWOS
Coordinates: 34.280, -88.361 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Lee

When: August 12, 11:00 AM CST to 7:00 PM CST
Where: Lee forecast zone
Reported by: ASOS
Coordinates: 34.290, -88.680 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, De Soto

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: De Soto forecast zone
Reported by: AWOS
Coordinates: 34.875, -89.992 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Tate

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Tate forecast zone
Reported by: AWOS
Coordinates: 34.650, -89.945 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Marshall

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Marshall forecast zone
Reported by: AWOS
Coordinates: 34.762, -89.503 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Benton

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Benton forecast zone
Reported by: AWOS
Coordinates: 34.817, -89.188 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Tippah

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Tippah forecast zone
Reported by: AWOS
Coordinates: 34.768, -88.909 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Alcorn

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Alcorn forecast zone
Reported by: AWOS
Coordinates: 34.881, -88.580 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Tishomingo

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Tishomingo forecast zone
Reported by: AWOS
Coordinates: 34.740, -88.239 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Prentiss

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Prentiss forecast zone
Reported by: AWOS
Coordinates: 34.618, -88.520 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Union

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Union forecast zone
Reported by: AWOS
Coordinates: 34.491, -89.004 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Heat, Lafayette

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Lafayette forecast zone
Reported by: AWOS
Coordinates: 34.357, -89.485 (the zone’s center; the record gives no point)

Heat indices in excess of 105 degrees.

Excessive Heat, Tunica

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Tunica forecast zone
Reported by: AWOS
Coordinates: 34.652, -90.375 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Coahoma

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Coahoma forecast zone
Reported by: AWOS
Coordinates: 34.229, -90.603 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Quitman

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Quitman forecast zone
Reported by: AWOS
Coordinates: 34.251, -90.289 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Panola

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Panola forecast zone
Reported by: AWOS
Coordinates: 34.364, -89.951 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Tallahatchie

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Tallahatchie forecast zone
Reported by: AWOS
Coordinates: 33.951, -90.173 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Yalobusha

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Yalobusha forecast zone
Reported by: AWOS
Coordinates: 34.028, -89.708 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Calhoun

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Calhoun forecast zone
Reported by: AWOS
Coordinates: 33.937, -89.336 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Chickasaw

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Chickasaw forecast zone
Reported by: AWOS
Coordinates: 33.921, -88.948 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Monroe

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Monroe forecast zone
Reported by: AWOS
Coordinates: 33.892, -88.480 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Pontotoc

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Pontotoc forecast zone
Reported by: AWOS
Coordinates: 34.225, -89.037 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Itawamba

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Itawamba forecast zone
Reported by: AWOS
Coordinates: 34.280, -88.361 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

Excessive Heat, Lee

When: August 14, 10:00 AM CST to 5:00 PM CST
Where: Lee forecast zone
Reported by: ASOS
Coordinates: 34.290, -88.680 (the zone’s center; the record gives no point)

Heat indices in excess of 110 degrees.

What these are

Heat: Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.
Excessive Heat: Heat at or above the local excessive heat warning criteria, or heat that caused deaths.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Mississippi in 2023 Every state in 2023 This day in weather history Warnings in Mississippi, August 2023

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1136381, 1136382, 1136383, 1136384, 1136385, 1136386, 1136387, 1136388, 1136389, 1136390, 1136391, 1136392, 1136393, 1136394, 1136395, 1136396, 1136397, 1136398, 1136399, 1136400, 1136401, 1136402, 1136324, 1136325, 1136326, 1136327, 1136328, 1136329, 1136330, 1136331, 1136332, 1136333, 1136334, 1136335, 1136336, 1136337, 1136338, 1136339, 1136340, 1136341, and more.