Alert archive / Tennessee / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 128, NWS Memphis, TN

August 13, 2019Hardin County, Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at Aug 13, 2019, 8:36 PM CDT for Hardin County, Tennessee. It was in force for 18 min. 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 13, 2019, 8:36 PM CDT (01:36 UTC)
Expired: Aug 13, 2019, 8:54 PM CDT
In force: 18 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Hardin County, TN

The radar

The Columbus AFB radar (KGWX), 145 km from the middle of the area, began a volume at 01:36 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

Nashville Metro, TN (KBNA), launched 00:00Z, 1.6 hours before the alert went out and 177 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: 348 J/kg
Mixed-layer CIN: -182 J/kg
Mixed-layer LCL: 1234 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 31 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 severe thunderstorm 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 severe thunderstorm warning went out at Aug 13, 7:44 PM CDT, 52 minutes earlier.

Area forecast discussion, Aug 13, 7:44 PM CDT, 52 minutes before

Area Forecast Discussion
National Weather Service Memphis TN
744 PM CDT Tue Aug 13 2019

.DISCUSSION...

Updated for aviation discussion

&&

.PREV DISCUSSION... /issued 325 PM CDT Tue Aug 13 2019/

Convection is having a hard time developing across the Midsouth
despite very unstable conditions the cap is proving to be equally
or more powerful. The ridge should continue to break down this
afternoon and a cold front will approach from the North providing
a better focus for lift. Expect storms to become more numerous
over the next couple of hours and likely peak in both coverage and
intensity around sunset. Rainfall totals will likely remain below
one half of an inch. There is the possibility that any storms
that do develop could produce locally damaging wind.

Temperatures soared into the middle to upper 90s area wide with
dew points in the upper 70s to low 80s resulting in one of the
hottest days we have seen in quite a while. Heat indices topped
out in the 112 to 118 range.

We should cool down by 5-10 degrees tomorrow, and dew points will
be in the in the upper 60s to low 70s. Heat indices should remain
in the middle 90s.

A few showers may linger in portions of North Mississippi early
tomorrow, but most of the Midsouth will be dry.

Thursday through Saturday expect dry conditions as Northwest flow
strengthens over the Midsouth. The storm track will likely be to
our North until possibly Sunday when guidance brings a fairly
strong shortwave out of the Central Plains across Missouri.
Guidance is now in better agreement with this scenario, but I'm
not confident enough yet to ramp pops up beyond low chance yet.
Temperatures should trend slightly cooler Sunday into early next
week.

30

&&

.AVIATION...

A cold front is moving south into the area. Scattered TSRAs have
developed along the front and are pushing south this evening.
Looks like activity will mainly miss KJBR/KMKL with KMEM and KTUP
more likely to see TSRAs on station with gusty winds. TSRAs will
push south this evening leaving behind mainly VFR conds aside from
perhaps some light fog. VFR on Wednesday with north winds around
10 kts.

SJM

&&

.MEG WATCHES/WARNINGS/ADVISORIES...
AR...Excessive Heat Warning until 8 PM CDT this evening for
     Crittenden-Lee AR-Phillips-St. Francis.

MO...None.
MS...Excessive Heat Warning until 8 PM CDT this evening for Alcorn-
     Benton MS-Calhoun-Chickasaw-Coahoma-DeSoto-Itawamba-
     Lafayette-Lee MS-Marshall-Monroe-Panola-Pontotoc-Prentiss-
     Quitman-Tallahatchie-Tate-Tippah-Tishomingo-Tunica-Union-
     Yalobusha.

TN...Excessive Heat Warning until 8 PM CDT this evening for Chester-
     Crockett-Decatur-Fayette-Hardeman-Hardin-Haywood-Henderson-
     Lauderdale-Madison-McNairy-Shelby-Tipton.

&&

Hazardous weather outlook, Aug 13, 8:34 PM CDT, 2 minutes before

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In the hours before

Local storm report, Aug 13, 8:15 PM CDT, 21 minutes before

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Special weather statement, Aug 13, 8:16 PM CDT, 20 minutes before

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Special weather statement, Aug 13, 8:18 PM CDT, 18 minutes before

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Local storm report, Aug 13, 8:28 PM CDT, 8 minutes before

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Special weather statement, Aug 13, 8:30 PM CDT, 6 minutes before

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Special weather statement, Aug 13, 8:30 PM CDT, 6 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
Aug 13, 7:13 PM CDT	Severe Thunderstorm Warning	MEG	DeSoto, Tunica	47 min
Aug 13, 7:37 PM CDT	Severe Thunderstorm Warning	MEG	DeSoto, Marshall, Tate	38 min
Aug 13, 7:49 PM CDT	Severe Thunderstorm Warning	MEG	DeSoto, Marshall	41 min
Aug 13, 7:58 PM CDT	Severe Thunderstorm Warning	MEG	DeSoto	17 min
Aug 13, 8:18 PM CDT	Special Weather Statement	MEG	Marshall	42 min
Aug 13, 8:30 PM CDT	Special Weather Statement	MEG	Benton	45 min
Aug 13, 9:11 PM CDT	Special Weather Statement	MEG	Alcorn, Tippah	49 min
Aug 13, 10:02 PM CDT	Special Weather Statement	MEG	Alcorn, Tishomingo	43 min
Aug 13, 10:31 PM CDT	Areal Flood Advisory	MEG	Alcorn, Tishomingo	119 min
Aug 13, 8:02 PM CDT	Special Weather Statement	MEG	McNairy	28 min
Aug 13, 8:16 PM CDT	Special Weather Statement	MEG	Fayette	14 min
Aug 14, 12:56 AM CDT	Special Weather Statement	MEG	Gibson	34 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2019 Every severe thunderstorm warning in 2019

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.