Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 328, NWS Memphis, TN

July 15, 20094 counties in Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at Jul 15, 2009, 8:25 PM CDT for 4 counties in Tennessee. It was in force for 65 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: Jul 15, 2009, 8:25 PM CDT (01:25 UTC)
Expired: Jul 15, 2009, 9:30 PM CDT
In force: 65 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon

Counties Decatur County, TN, Hardin County, TN, Henderson County, TN, McNairy County, TN

The radar

The Memphis radar (KNQA), 142 km from the middle of the area, began a volume at 01:29 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 15, 6:03 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 1.4 hours before the alert went out and 162 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: 4202 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1288 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 60 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 Jul 15, 8:02 PM CDT, 23 minutes earlier.

Area forecast discussion, Jul 15, 8:02 PM CDT, 23 minutes before

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Hazardous weather outlook, Jul 15, 7:39 PM CDT, 46 minutes before

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In the hours before

Local storm report, Jul 15, 7:39 PM CDT, 46 minutes before

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Local storm report, Jul 15, 7:46 PM CDT, 39 minutes before

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Local storm report, Jul 15, 8:01 PM CDT, 24 minutes before

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Local storm report, Jul 15, 8:09 PM CDT, 16 minutes before

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Local storm report, Jul 15, 8:21 PM CDT, 4 minutes before

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Local storm report, Jul 15, 8:25 PM CDT, 0 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 15, 10:10 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Tippah	50 min
Jul 16, 3:32 AM CDT	Heat Advisory	MEG	Calhoun, Chickasaw, Coahoma, Lafayette, Panola, Pontotoc and 5 more	6 hr
Jul 16, 7:40 AM CDT	Flash Flood Warning	MEG	DeSoto, Marshall, Tate	3 hr
Jul 16, 8:14 AM CDT	Flash Flood Warning	MEG	Coahoma, Lafayette, Panola, Quitman, Tunica	2 hr
Jul 16, 8:21 AM CDT	Severe Thunderstorm Warning	MEG	Benton, Lafayette, Marshall, Panola, Pontotoc, Tate and 2 more	39 min
Jul 16, 8:35 AM CDT	Flash Flood Warning	MEG	Alcorn, Benton, Prentiss, Tippah, Union	108 min
Jul 16, 8:39 AM CDT	Flash Flood Warning	MEG	Tishomingo	99 min
Jul 16, 9:03 AM CDT	Severe Thunderstorm Warning	MEG	Lafayette, Lee, Marshall, Pontotoc, Prentiss, Union	42 min
Jul 15, 7:00 PM CDT	Severe Thunderstorm Warning	MEG	Carroll, Dyer, Gibson, Henry, Obion, Weakley	45 min
Jul 15, 7:02 PM CDT	Severe Thunderstorm Warning	MEG	Crockett, Dyer, Gibson, Haywood, Lauderdale	58 min
Jul 15, 7:10 PM CDT	Severe Thunderstorm Warning	MEG	Dyer, Haywood, Lauderdale	23 min
Jul 15, 7:20 PM CDT	Severe Thunderstorm Warning	MEG	Haywood, Lauderdale, Tipton	34 min
Jul 15, 7:22 PM CDT	Severe Thunderstorm Warning	MEG	Lauderdale, Tipton	33 min
Jul 15, 7:24 PM CDT	Severe Thunderstorm Warning	MEG	Carroll	15 min
Jul 15, 7:35 PM CDT	Severe Thunderstorm Warning	MEG	Chester, Hardeman, Henderson, McNairy, Madison	55 min
Jul 15, 7:40 PM CDT	Severe Thunderstorm Warning	MEG	Carroll, Gibson, Henry, Weakley	51 min
Jul 15, 7:43 PM CDT	Severe Thunderstorm Warning	MEG	Carroll, Crockett, Gibson, Haywood, Henderson, Madison	43 min
Jul 15, 7:57 PM CDT	Severe Thunderstorm Warning	MEG	Decatur	48 min
Jul 15, 8:01 PM CDT	Severe Thunderstorm Warning	MEG	Fayette, Hardeman, Haywood, Madison	59 min
Jul 15, 8:09 PM CDT	Severe Thunderstorm Warning	MEG	Decatur	51 min
Jul 15, 8:16 PM CDT	Severe Thunderstorm Warning	MEG	Carroll, Chester, Decatur, Hardin, Henderson, McNairy	23 min
Jul 15, 8:30 PM CDT	Severe Thunderstorm Warning	MEG	Chester, Hardeman, McNairy	45 min
Jul 16, 1:43 AM CDT	Severe Thunderstorm Warning	MEG	Haywood, Lauderdale, Tipton	62 min
Jul 16, 2:06 AM CDT	Severe Thunderstorm Warning	MEG	Lauderdale	39 min
Jul 16, 4:06 AM CDT	Flash Flood Warning	MEG	Lauderdale	6 hr
Jul 16, 4:32 AM CDT	Flash Flood Warning	MEG	Lauderdale	5 hr
Jul 16, 4:56 AM CDT	Flash Flood Warning	MEG	Tipton	5 hr
Jul 16, 5:19 AM CDT	Flash Flood Warning	MEG	Shelby	5 hr
Jul 16, 6:41 AM CDT	Flash Flood Warning	MEG	Shelby	4 hr
Jul 16, 7:52 AM CDT	Areal Flood Advisory	MEG	Chester, Decatur, Hardeman, Hardin, Henderson, McNairy and 1 more	2 hr
Jul 16, 8:04 AM CDT	Areal Flood Advisory	MEG	Fayette, Hardeman	2 hr
Jul 16, 8:48 AM CDT	Areal Flood Advisory	MEG	Crockett, Haywood	93 min
Jul 16, 1:31 AM CDT	Severe Thunderstorm Warning	MEG	Mississippi	31 min
Jul 16, 3:10 AM CDT	Severe Thunderstorm Warning	MEG	Mississippi	19 min
Jul 16, 4:10 AM CDT	Areal Flood Advisory	MEG	Clay, Greene, Mississippi	3 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2009 Every severe thunderstorm warning in 2009

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.