Alert archive / Arkansas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 214, NWS Memphis, TN

August 29, 2020Lee County, St. Francis County, Arkansas

NWS Memphis, TN issued this severe thunderstorm warning at Aug 29, 2020, 4:48 PM CDT for Lee County, St. Francis County, Arkansas. It was in force for 42 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 29, 2020, 4:48 PM CDT (21:48 UTC)
Expired: Aug 29, 2020, 5:30 PM CDT
In force: 42 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lee County, AR, St. Francis County, AR

The radar

The Memphis radar (KNQA), 95 km from the middle of the area, began a volume at 21:51 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

Springfield, MO (KSGF), launched 12:00Z, 9.8 hours before the alert went out and 352 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: 1326 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1347 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 65 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 29, 3:09 PM CDT, 1 hour 39 minutes earlier.

Area forecast discussion, Aug 29, 3:09 PM CDT, 1 hour 39 minutes before

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Hazardous weather outlook, Aug 29, 1:37 PM CDT, 3 hours 11 minutes before

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In the hours before

Special weather statement, Aug 29, 4:10 PM CDT, 38 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 28, 7:04 PM CDT	Special Weather Statement	MEG	Union	41 min
Aug 28, 7:13 PM CDT	Severe Thunderstorm Warning	MEG	Benton, Lee, Prentiss, Tippah, Union	47 min
Aug 28, 7:24 PM CDT	Special Weather Statement	MEG	Alcorn, Tishomingo	66 min
Aug 28, 7:39 PM CDT	Areal Flood Advisory	MEG	Alcorn, Benton, Prentiss, Tippah, Tishomingo	4 hr
Aug 28, 8:31 PM CDT	Flash Flood Warning	MEG	Prentiss, Tishomingo	5 hr
Aug 28, 8:47 PM CDT	Areal Flood Advisory	MEG	Itawamba, Lee, Union	116 min
Aug 28, 9:10 PM CDT	Special Weather Statement	MEG	Itawamba	35 min
Aug 28, 9:38 PM CDT	Special Weather Statement	MEG	Lee, Union	37 min
Aug 28, 9:55 PM CDT	Areal Flood Advisory	MEG	Benton, Prentiss, Tippah, Union	48 min
Aug 28, 10:43 PM CDT	Flash Flood Warning	MEG	Benton, Prentiss, Tippah, Union	3 hr
Aug 28, 10:43 PM CDT	Flash Flood Warning	MEG	Itawamba, Lee, Union	3 hr
Aug 28, 10:53 PM CDT	Areal Flood Advisory	MEG	Itawamba, Lee, Pontotoc	39 min
Aug 28, 11:16 PM CDT	Areal Flood Advisory	MEG	Lafayette, Marshall	104 min
Aug 28, 11:32 PM CDT	Flash Flood Warning	MEG	Itawamba, Lee, Pontotoc	4 hr
Aug 28, 11:34 PM CDT	Areal Flood Advisory	MEG	Calhoun, Chickasaw, Itawamba, Lee, Monroe, Pontotoc	3 hr
Aug 29, 12:03 AM CDT	Flash Flood Warning	MEG	Calhoun, Chickasaw, Itawamba, Lee, Monroe, Pontotoc	3 hr
Aug 29, 1:23 AM CDT	Areal Flood Advisory	MEG	Lafayette	3 hr
Aug 29, 4:10 PM CDT	Special Weather Statement	MEG	Obion	35 min
Aug 29, 3:07 PM CDT	Severe Thunderstorm Warning	MEG	Craighead, Greene, Poinsett	38 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2020 Every severe thunderstorm warning in 2020

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.