Alert archive / Arkansas / Excessive Heat Warnings in 2017

Excessive Heat Warning 3, NWS Memphis, TN

July 23, 20175 counties in Tennessee; DeSoto County, Mississippi; 8 counties in Arkansas

NWS Memphis, TN issued this excessive heat warning at Jul 23, 2017, 1:34 PM CDT for 5 counties in Tennessee; DeSoto County, Mississippi; 8 counties in Arkansas. It was in force for 6 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: Jul 23, 2017, 1:34 PM CDT (18:34 UTC)
Expired: Jul 23, 2017, 8:00 PM CDT
In force: 6 hr
Issued by: NWS Memphis, TN

Counties Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Mississippi County, AR, Poinsett County, AR, St. Francis County, AR, DeSoto County, MS, Dyer County, TN, Fayette County, TN, Lauderdale County, TN, Shelby County, TN, Tipton County, TN

The radar

The Memphis radar (KNQA), 35 km from the middle of the area, began a volume at 18:33 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 (KBYH), launched 12:00Z, 6.6 hours before the alert went out and 83 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1403 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1121 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: 5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Jul 23, 12:42 PM CDT, 52 minutes earlier.

Area forecast discussion, Jul 23, 12:42 PM CDT, 52 minutes before

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Hazardous weather outlook, Jul 23, 4:22 AM CDT, 9 hours 12 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 3:27 PM CDT	Special Weather Statement	MEG	Lauderdale	33 min
Jul 23, 3:54 PM CDT	Severe Thunderstorm Warning	MEG	Lauderdale	36 min
Jul 23, 4:38 PM CDT	Special Weather Statement	MEG	Crockett	37 min
Jul 23, 4:54 PM CDT	Special Weather Statement	MEG	Shelby	21 min
Jul 23, 5:03 PM CDT	Areal Flood Advisory	MEG	Shelby	57 min
Jul 23, 5:10 PM CDT	Special Weather Statement	MEG	Madison	35 min
Jul 23, 5:18 PM CDT	Special Weather Statement	MEG	Shelby	27 min
Jul 23, 5:28 PM CDT	Special Weather Statement	MEG	Henderson	32 min
Jul 23, 5:32 PM CDT	Severe Thunderstorm Warning	MEG	Henderson, Madison	43 min
Jul 23, 5:35 PM CDT	Severe Thunderstorm Warning	MEG	Fayette, Shelby, Tipton	40 min
Jul 23, 5:39 PM CDT	Severe Thunderstorm Warning	MEG	Carroll, Decatur, Henderson	51 min
Jul 23, 5:57 PM CDT	Areal Flood Advisory	MEG	Carroll, Henderson	2 hr
Jul 23, 6:10 PM CDT	Special Weather Statement	MEG	Chester	35 min
Jul 23, 6:21 PM CDT	Severe Thunderstorm Warning	MEG	Hardeman, Haywood, Madison	39 min
Jul 23, 6:40 PM CDT	Special Weather Statement	MEG	Madison	35 min
Jul 23, 4:35 PM CDT	Special Weather Statement	MEG	Mississippi	25 min
Jul 23, 6:06 PM CDT	Special Weather Statement	MEG	Mississippi	24 min

Nearby

Excessive Heat Warnings in Arkansas, 2017 Excessive Heat Warnings in Tennessee, 2017 Excessive Heat Warnings in Mississippi, 2017 Every excessive heat warning in 2017

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.