Alert archive / Tennessee / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 319, NWS Memphis, TN

October 7, 2014Fayette County, Shelby County, Tennessee; DeSoto County, Marshall County, Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Oct 7, 2014, 8:15 AM CDT for Fayette County, Shelby County, Tennessee; DeSoto County, Marshall County, Mississippi. It was in force for 14 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: Oct 7, 2014, 8:15 AM CDT (13:15 UTC)
Expired: Oct 7, 2014, 8:29 AM CDT
In force: 14 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon

Counties DeSoto County, MS, Marshall County, MS, Fayette County, TN, Shelby County, TN

The radar

The Memphis radar (KNQA), 41 km from the middle of the area, began a volume at 13:17 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 12:00Z, 1.3 hours before the alert went out and 307 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: 479 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1057 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 168 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 6.1

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 Oct 7, 7:24 AM CDT, 51 minutes earlier.

Area forecast discussion, Oct 7, 7:24 AM CDT, 51 minutes before

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Hazardous weather outlook, Oct 7, 3:50 AM CDT, 4 hours 25 minutes before

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In the hours before

Local storm report, Oct 7, 6:29 AM CDT, 1 hour 46 minutes before

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Local storm report, Oct 7, 6:36 AM CDT, 1 hour 39 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
Oct 7, 5:37 AM CDT	Severe Thunderstorm Warning	MEG	Lauderdale, Tipton	22 min
Oct 6, 7:22 PM CDT	Severe Thunderstorm Warning	MEG	Itawamba, Prentiss, Tishomingo	23 min
Oct 6, 7:44 PM CDT	Special Weather Statement	MEG	Itawamba	46 min
Oct 6, 7:56 PM CDT	Severe Thunderstorm Warning	MEG	Lee	23 min
Oct 6, 8:11 PM CDT	Special Weather Statement	MEG	Pontotoc	49 min
Oct 6, 8:28 PM CDT	Severe Thunderstorm Warning	MEG	Itawamba, Monroe	25 min
Oct 7, 3:06 AM CDT	Severe Thunderstorm Warning	MEG	Craighead, Lawrence	39 min
Oct 7, 3:53 AM CDT	Severe Thunderstorm Warning	MEG	Craighead	52 min
Oct 7, 4:57 AM CDT	Severe Thunderstorm Warning	MEG	Craighead, Greene, Mississippi	48 min
Oct 7, 6:35 AM CDT	Severe Thunderstorm Warning	MEG	Craighead, Greene, Mississippi, Poinsett	40 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2014 Severe Thunderstorm Warnings in Mississippi, 2014 Every severe thunderstorm warning in 2014

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.