Excessive Heat and Heat in Tennessee, July 20 to 23, 2017

Name: Excessive Heat and Heat in Tennessee, July 20 to 23, 2017
Start: 2017-07-20T12:00
End: 2017-07-23T17:00
Location: Tennessee

July 20 to 23, 2017 · NWS MEG · 28 events in 19 counties and zones

Upper level high pressure built over the Mid-South from mid to late July. High temperatures combined with high humidity to create dangerous conditions across much of the Mid-South.

Where it happened

Every event with a place to put it; 28 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 28

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.

Upper level high pressure built over the Mid-South from mid to late July. High temperatures combined with high humidity to create dangerous conditions across much of the Mid-South.

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 Jul 20, 11:34 AM CST, 26 minutes earlier.

Area forecast discussion, Jul 20, 11:34 AM CST, 26 minutes before

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Hazardous weather outlook, Jul 20, 3:27 AM CST, 8 hours 33 minutes before

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The radar

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

Open the radar archive at this moment

Event by event

21 heat, 7 excessive heat. Local standard time, as filed.

Heat, Weakley

When: July 20, 12:00 PM CST to July 23, 5:00 PM CST
Where: Weakley forecast zone
Reported by: ASOS
Coordinates: 36.298, -88.718 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Henry

When: July 20, 12:00 PM CST to July 23, 5:00 PM CST
Where: Henry forecast zone
Reported by: ASOS
Coordinates: 36.332, -88.301 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Gibson

When: July 20, 12:00 PM CST to July 23, 5:00 PM CST
Where: Gibson forecast zone
Reported by: ASOS
Coordinates: 35.997, -88.933 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Carroll

When: July 20, 12:00 PM CST to July 23, 5:00 PM CST
Where: Carroll forecast zone
Reported by: ASOS
Coordinates: 35.973, -88.450 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Benton

When: July 20, 12:00 PM CST to July 23, 5:00 PM CST
Where: Benton forecast zone
Reported by: ASOS
Coordinates: 36.070, -88.068 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Crockett

When: July 20, 12:00 PM CST to July 23, 5:00 PM CST
Where: Crockett forecast zone
Reported by: ASOS
Coordinates: 35.814, -89.139 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Haywood

When: July 20, 12:00 PM CST to July 23, 5:00 PM CST
Where: Haywood forecast zone
Reported by: ASOS
Coordinates: 35.583, -89.284 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Madison

When: July 20, 12:00 PM CST to July 23, 5:00 PM CST
Where: Madison forecast zone
Reported by: ASOS
Coordinates: 35.608, -88.838 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Henderson

When: July 20, 12:00 PM CST to July 23, 5:00 PM CST
Where: Henderson forecast zone
Reported by: ASOS
Coordinates: 35.654, -88.388 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Decatur

When: July 20, 12:00 PM CST to July 23, 5:00 PM CST
Where: Decatur forecast zone
Reported by: ASOS
Coordinates: 35.603, -88.109 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Chester

When: July 20, 12:00 PM CST to July 23, 5:00 PM CST
Where: Chester forecast zone
Reported by: ASOS
Coordinates: 35.422, -88.613 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Hardeman

When: July 20, 12:00 PM CST to July 23, 5:00 PM CST
Where: Hardeman forecast zone
Reported by: ASOS
Coordinates: 35.207, -88.993 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Shelby

When: July 20, 12:00 PM CST to July 21, 12:00 PM CST
Where: Shelby forecast zone
Reported by: ASOS
Coordinates: 35.184, -89.896 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Tipton

When: July 20, 12:00 PM CST to July 21, 12:00 PM CST
Where: Tipton forecast zone
Reported by: ASOS
Coordinates: 35.497, -89.759 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Lauderdale

When: July 20, 12:00 PM CST to July 21, 12:00 PM CST
Where: Lauderdale forecast zone
Reported by: ASOS
Coordinates: 35.761, -89.631 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Dyer

When: July 20, 12:00 PM CST to July 21, 12:00 PM CST
Where: Dyer forecast zone
Reported by: ASOS
Coordinates: 36.059, -89.414 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Lake

When: July 20, 12:00 PM CST to July 21, 12:00 PM CST
Where: Lake forecast zone
Reported by: ASOS
Coordinates: 36.335, -89.493 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Obion

When: July 20, 12:00 PM CST to July 21, 12:00 PM CST
Where: Obion forecast zone
Reported by: ASOS
Coordinates: 36.358, -89.149 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Fayette

When: July 20, 12:00 PM CST to July 23, 12:00 PM CST
Where: Fayette forecast zone
Reported by: ASOS
Coordinates: 35.197, -89.414 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Excessive Heat, Shelby

When: July 21, 12:00 PM CST to July 23, 5:00 PM CST
Where: Shelby forecast zone
Reported by: ASOS
Coordinates: 35.184, -89.896 (the zone’s center; the record gives no point)

Heat index values climbed above 110 degrees.

Excessive Heat, Tipton

When: July 21, 12:00 PM CST to July 23, 5:00 PM CST
Where: Tipton forecast zone
Reported by: ASOS
Coordinates: 35.497, -89.759 (the zone’s center; the record gives no point)

Heat index values climbed above 110 degrees.

Excessive Heat, Lauderdale

When: July 21, 12:00 PM CST to July 23, 5:00 PM CST
Where: Lauderdale forecast zone
Reported by: ASOS
Coordinates: 35.761, -89.631 (the zone’s center; the record gives no point)

Heat index values climbed above 110 degrees.

Excessive Heat, Dyer

When: July 21, 12:00 PM CST to July 23, 5:00 PM CST
Where: Dyer forecast zone
Reported by: ASOS
Coordinates: 36.059, -89.414 (the zone’s center; the record gives no point)

Heat index values climbed above 110 degrees.

Excessive Heat, Lake

When: July 21, 12:00 PM CST to July 22, 5:00 PM CST
Where: Lake forecast zone
Reported by: ASOS
Coordinates: 36.335, -89.493 (the zone’s center; the record gives no point)

Heat index values climbed above 110 degrees.

Excessive Heat, Obion

When: July 21, 12:00 PM CST to July 22, 5:00 PM CST
Where: Obion forecast zone
Reported by: ASOS
Coordinates: 36.358, -89.149 (the zone’s center; the record gives no point)

Heat index values climbed above 110 degrees.

Heat, Lake

When: July 22, 5:00 PM CST to July 23, 5:00 PM CST
Where: Lake forecast zone
Reported by: ASOS
Coordinates: 36.335, -89.493 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Heat, Obion

When: July 22, 5:00 PM CST to July 23, 5:00 PM CST
Where: Obion forecast zone
Reported by: ASOS
Coordinates: 36.358, -89.149 (the zone’s center; the record gives no point)

Heat index values climbed above 105 degrees.

Excessive Heat, Fayette

When: July 23, 12:00 PM CST to 5:00 PM CST
Where: Fayette forecast zone
Reported by: ASOS
Coordinates: 35.197, -89.414 (the zone’s center; the record gives no point)

Heat index values climbed above 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 Tennessee in 2017 Every state in 2017 This day in weather history Warnings in Tennessee, July 2017

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: 712673, 712674, 712675, 712676, 712677, 712678, 712679, 712680, 712681, 712682, 712683, 712684, 712685, 712686, 712687, 712688, 712689, 712690, 712691, 712692, 712693, 712694, 712695, 712696, 712697, 712698, 712699, 712700.