Alert archive / Tennessee / Tornado Watches in 2009

Tornado Watch 422

June 15, 20097 counties in Arkansas; 5 counties in Missouri; 27 counties in Tennessee

The Storm Prediction Center issued this tornado watch at Jun 15, 2009, 2:48 PM CDT for 7 counties in Arkansas; 5 counties in Missouri; 27 counties in Tennessee. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jun 15, 2009, 2:48 PM CDT (19:48 UTC)
Expired: Jun 15, 2009, 5:41 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2.5 in
Strongest gust expected: 70 kt

All 39 counties

Clay County, AR, Craighead County, AR, Greene County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Butler County, MO, Dunklin County, MO, New Madrid County, MO, Pemiscot County, MO, Ripley County, MO, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dickson County, TN, Dyer County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Perry County, TN, Tipton County, TN, Wayne County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 96 km from the middle of the area, began a volume at 19:57 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 40%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 30%
One or more gusts of 65 knots or more: 30%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 70%

Warnings issued inside it

38 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 15, 2:53 PM CDT	Tornado Warning	PAH	Ripley	37 min
Jun 15, 2:53 PM CDT	Tornado Warning	MEG	Crockett, Dyer, Haywood, Lauderdale	52 min
Jun 15, 2:55 PM CDT	Severe Thunderstorm Warning	MEG	Clay, Randolph	50 min
Jun 15, 3:03 PM CDT	Flash Flood Warning	PAH	Butler	3 hr
Jun 15, 3:11 PM CDT	Tornado Warning	PAH	Butler	34 min
Jun 15, 3:14 PM CDT	Tornado Warning	MEG	Clay	46 min
Jun 15, 3:17 PM CDT	Severe Thunderstorm Warning	MEG	Clay, Greene, Randolph	43 min
Jun 15, 3:21 PM CDT	Severe Thunderstorm Warning	MEG	Decatur, Henderson, Madison	39 min
Jun 15, 3:26 PM CDT	Flash Flood Warning	MEG	Decatur	3 hr
Jun 15, 3:27 PM CDT	Tornado Warning	MEG	Crockett, Haywood	33 min
Jun 15, 3:43 PM CDT	Tornado Warning	MEG	Crockett, Gibson	29 min
Jun 15, 3:44 PM CDT	Flash Flood Warning	PAH	Ripley	110 min
Jun 15, 3:45 PM CDT	Severe Thunderstorm Warning	MEG	Clay, Greene, Lawrence, Randolph	30 min
Jun 15, 3:48 PM CDT	Flash Flood Warning	MEG	Clay, Greene, Randolph	3 hr
Jun 15, 3:50 PM CDT	Severe Thunderstorm Warning	MEG	Clay, Craighead, Greene, Lawrence, Mississippi	55 min
Jun 15, 3:54 PM CDT	Severe Thunderstorm Warning	MEG	Decatur, Henderson	49 min
Jun 15, 3:56 PM CDT	Severe Thunderstorm Warning	MEG	Mississippi	49 min
Jun 15, 3:59 PM CDT	Severe Thunderstorm Warning	MEG	Carroll, Crockett, Gibson, Haywood, Madison	61 min
Jun 15, 4:07 PM CDT	Tornado Warning	MEG	Chester, Crockett, Henderson, Madison	53 min
Jun 15, 4:08 PM CDT	Flash Flood Warning	MEG	Carroll, Chester, Crockett, Dyer, Gibson, Haywood and 5 more	3 hr
Jun 15, 4:10 PM CDT	Tornado Warning	MEG	Decatur, Hardin, Henderson	50 min
Jun 15, 4:17 PM CDT	Tornado Warning	OHX	Perry, Wayne	43 min
Jun 15, 4:21 PM CDT	Severe Thunderstorm Warning	MEG	Clay, Craighead, Greene, Lawrence, Randolph	39 min
Jun 15, 4:27 PM CDT	Severe Thunderstorm Warning	MEG	Mississippi	48 min
Jun 15, 4:42 PM CDT	Severe Thunderstorm Warning	MEG	Clay, Craighead, Greene, Mississippi	48 min
Jun 15, 4:45 PM CDT	Flash Flood Warning	MEG	Craighead, Greene, Lawrence, Mississippi	2 hr
Jun 15, 4:56 PM CDT	Severe Thunderstorm Warning	MEG	Mississippi	19 min
Jun 15, 4:57 PM CDT	Tornado Warning	OHX	Wayne	33 min
Jun 15, 5:00 PM CDT	Tornado Warning	MEG	Decatur, Hardin	15 min
Jun 15, 5:10 PM CDT	Severe Thunderstorm Warning	MEG	Craighead, Poinsett	50 min
Jun 15, 5:13 PM CDT	Severe Thunderstorm Warning	MEG	Mississippi	47 min
Jun 15, 5:22 PM CDT	Tornado Warning	OHX	Lawrence, Wayne	23 min
Jun 15, 5:26 PM CDT	Tornado Warning	OHX	Wayne	34 min
Jun 15, 5:27 PM CDT	Flash Flood Warning	MEG	Craighead, Mississippi, Poinsett	97 min
Jun 15, 5:34 PM CDT	Severe Thunderstorm Warning	MEG	Crockett, Fayette, Hardeman, Haywood, Madison, Shelby and 1 more	41 min
Jun 15, 5:36 PM CDT	Flash Flood Warning	OHX	Lawrence, Wayne	114 min
Jun 15, 5:39 PM CDT	Severe Thunderstorm Warning	MEG	Craighead, Poinsett	36 min
Jun 15, 5:40 PM CDT	Tornado Warning	OHX	Lawrence, Wayne	35 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 7.8 hours before the alert went out and 153 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: 3093 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 630 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 9.9

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 15, 9:59 AM CDT	Mesoscale Discussion	SPC	Clay, Greene, Mississippi, Randolph	31 min
Jun 15, 10:34 AM CDT	Severe Thunderstorm Watch	SPC	Clay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 1 more	7 hr
Jun 15, 1:56 PM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 1 more	64 min
Jun 15, 3:52 PM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Fulton, Greene, Izard, Lawrence and 4 more	53 min
Jun 15, 4:57 PM CDT	Mesoscale Discussion	SPC	Clay, Cleburne, Craighead, Crittenden, Cross, Greene and 11 more	63 min
Jun 15, 5:35 PM CDT	Severe Thunderstorm Watch	SPC	Craighead, Crittenden, Cross, Lee, Mississippi, Poinsett and 1 more	6 hr
Jun 15, 6:24 AM CDT	Mesoscale Discussion	SPC	Ballard, Carlisle, Fulton, Graves, Hickman, McCracken	96 min
Jun 14, 10:36 PM CDT	Mesoscale Discussion	SPC	Platte	114 min
Jun 15, 3:55 AM CDT	Mesoscale Discussion	SPC	Bates, Benton, Camden, Cass, Cedar, Clay and 14 more	65 min
Jun 15, 11:59 AM CDT	Mesoscale Discussion	SPC	Barry, Barton, Bates, Camden, Cedar, Christian and 24 more	61 min
Jun 15, 12:52 PM CDT	Severe Thunderstorm Watch	SPC	Barry, Barton, Benton, Camden, Cedar, Christian and 28 more	9 hr
Jun 15, 3:47 PM CDT	Mesoscale Discussion	SPC	Barton, Camden, Cedar, Christian, Dade, Dallas and 19 more	88 min
Jun 15, 6:50 PM CDT	Mesoscale Discussion	SPC	Barry, Barton, Camden, Cedar, Christian, Crawford and 25 more	85 min

Nearby

Tornado Watches in Tennessee, 2009 Tornado Watches in Arkansas, 2009 Tornado Watches in Missouri, 2009 Every tornado watch 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.