Alert archive / Arkansas / Excessive Heat Warnings in 2018

Excessive Heat Warning 1, NWS Memphis, TN

June 29, 2018Dyer County, Lake County, Obion County, Tennessee; Coahoma County, Mississippi; 12 counties in Arkansas

NWS Memphis, TN issued this excessive heat warning at Jun 29, 2018, 3:54 AM CDT for Dyer County, Lake County, Obion County, Tennessee; Coahoma County, Mississippi; 12 counties in Arkansas. It took effect at Jun 29, 2018, 10:00 AM CDT. It was in force for 58 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: Jun 29, 2018, 3:54 AM CDT (08:54 UTC)
In effect from: Jun 29, 2018, 10:00 AM CDT
Expired: Jul 1, 2018, 7:48 PM CDT
In force: 58 hr
Issued by: NWS Memphis, TN

Counties Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lawrence County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, Randolph County, AR, St. Francis County, AR, Coahoma County, MS, Dyer County, TN, Lake County, TN, Obion County, TN

The radar

The Memphis radar (KNQA), 57 km from the middle of the area, began a volume at 08:54 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 00:00Z, 8.9 hours before the alert went out and 96 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: 2733 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 1855 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: -8 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 Jun 28, 11:51 PM CDT, 4 hours 3 minutes earlier.

Area forecast discussion, Jun 28, 11:51 PM CDT, 4 hours 3 minutes before

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Hazardous weather outlook, Jun 29, 12:35 AM CDT, 3 hours 19 minutes before

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In the hours before

Special weather statement, Jun 29, 12:24 AM CDT, 3 hours 30 minutes before

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Special weather statement, Jun 29, 12:43 AM CDT, 3 hours 11 minutes before

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Special weather statement, Jun 29, 12:52 AM CDT, 3 hours 2 minutes before

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Special weather statement, Jun 29, 12:54 AM CDT, 3 hours before

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Special weather statement, Jun 29, 1:05 AM CDT, 2 hours 49 minutes before

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Special weather statement, Jun 29, 1:26 AM CDT, 2 hours 28 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
Jun 28, 8:36 PM CDT	Severe Thunderstorm Warning	MEG	Benton, Dyer, Gibson, Henry, Lake, Obion and 1 more	54 min
Jun 28, 9:11 PM CDT	Severe Thunderstorm Warning	MEG	Benton, Carroll, Gibson, Henry, Weakley	49 min
Jun 28, 9:22 PM CDT	Severe Thunderstorm Warning	MEG	Crockett, Dyer, Lake, Obion	68 min
Jun 28, 9:27 PM CDT	Severe Thunderstorm Warning	MEG	Benton, Henry, Obion, Weakley	33 min
Jun 28, 9:55 PM CDT	Severe Thunderstorm Warning	MEG	Benton, Carroll, Crockett, Decatur, Gibson, Henderson and 4 more	65 min
Jun 28, 10:01 PM CDT	Severe Thunderstorm Warning	MEG	Crockett, Dyer, Gibson, Lake, Lauderdale, Obion	59 min
Jun 28, 10:13 PM CDT	Severe Thunderstorm Warning	MEG	Crockett, Dyer, Hardeman, Haywood, Lauderdale, Tipton	62 min
Jun 28, 10:27 PM CDT	Severe Thunderstorm Warning	MEG	Carroll, Chester, Crockett, Decatur, Gibson, Hardeman and 4 more	48 min
Jun 28, 10:50 PM CDT	Special Weather Statement	MEG	Fayette, Shelby	55 min
Jun 28, 11:10 PM CDT	Special Weather Statement	MEG	Haywood, Lauderdale, Tipton	50 min
Jun 28, 11:13 PM CDT	Special Weather Statement	MEG	Chester, Hardeman, Hardin, McNairy	47 min
Jun 28, 11:36 PM CDT	Special Weather Statement	MEG	Fayette, Shelby	54 min
Jun 29, 12:24 AM CDT	Special Weather Statement	MEG	Fayette, Shelby	51 min
Jun 28, 7:00 PM CDT	Areal Flood Advisory	MEG	Chickasaw, Lee, Monroe, Pontotoc	38 min
Jun 28, 7:08 PM CDT	Special Weather Statement	MEG	Pontotoc	37 min
Jun 28, 7:16 PM CDT	Special Weather Statement	MEG	Chickasaw	44 min
Jun 28, 7:25 PM CDT	Special Weather Statement	MEG	Calhoun	50 min
Jun 28, 11:53 PM CDT	Special Weather Statement	MEG	Alcorn, Benton, Prentiss, Tippah, Tishomingo, Union	52 min
Jun 29, 12:43 AM CDT	Special Weather Statement	MEG	Itawamba, Lafayette, Lee, Pontotoc, Prentiss, Union	47 min
Jun 29, 12:52 AM CDT	Special Weather Statement	MEG	DeSoto, Lafayette, Marshall, Panola, Tate, Tunica	38 min
Jun 29, 1:05 AM CDT	Special Weather Statement	MEG	Calhoun, Chickasaw, Monroe, Pontotoc	40 min
Jun 29, 1:26 AM CDT	Special Weather Statement	MEG	Coahoma, Lafayette, Panola, Quitman, Tallahatchie, Tunica and 1 more	64 min
Jun 28, 10:15 PM CDT	Special Weather Statement	MEG	Clay, Greene, Randolph	45 min
Jun 28, 10:30 PM CDT	Special Weather Statement	MEG	Craighead, Greene, Lawrence, Poinsett, Randolph	60 min
Jun 28, 10:54 PM CDT	Severe Thunderstorm Warning	MEG	Clay, Greene, Lawrence, Randolph	66 min
Jun 28, 11:24 PM CDT	Severe Thunderstorm Warning	MEG	Craighead, Greene, Lawrence, Poinsett, Randolph	51 min
Jun 28, 11:26 PM CDT	Special Weather Statement	MEG	Cross, St. Francis	64 min
Jun 29, 12:10 AM CDT	Special Weather Statement	MEG	Craighead, Crittenden, Cross, Poinsett, St. Francis	65 min
Jun 29, 12:54 AM CDT	Special Weather Statement	MEG	Lee, Phillips, St. Francis	51 min

Nearby

Excessive Heat Warnings in Arkansas, 2018 Excessive Heat Warnings in Tennessee, 2018 Excessive Heat Warnings in Mississippi, 2018 Every excessive heat warning in 2018

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.