Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 173, NWS Nashville, TN

June 11, 20094 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jun 11, 2009, 8:18 AM CDT for 4 counties in Tennessee. It was in force for 27 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: Jun 11, 2009, 8:18 AM CDT (13:18 UTC)
Expired: Jun 11, 2009, 8:45 AM CDT
In force: 27 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Hickman County, TN, Lewis County, TN, Maury County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 85 km from the middle of the area, began a volume at 13:21 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 74 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: 2748 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 4.5

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 Nashville, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 11, 3:55 AM CDT, 4 hours 23 minutes earlier.

Area forecast discussion, Jun 11, 3:55 AM CDT, 4 hours 23 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
355 AM CDT THU JUN 11 2009

.SHORT TERM (THROUGH SUN)...
THREE DISTINCE AREAS OF MCS ACTIVITY EARLY THIS MORNING. STRONGEST
CENTER NORTH IN THE OH VLY. S/W ASSOCIATED WITH IT HEADING
NORTHEAST SO NOT A FACTOR IN MID TN FORECAST. ANOTHER ONE OVR AR
WITH SOME INSTAB DOWNSTREAM COMES INTO PLAY. SYS SHOULD GENERATE A
ROUND OF SHOWERS AND THUNDERSTORMS IN MID TN THIS MORNING...LIKELY
POPS. A FEW STRONG TO SVR STORMS NOT OUT OF THE QUESTION. LULL IN
ACTIVITY WEST HALF OF MIDSTATE THIS AFTERNOON.

EXPECT FRONT TO MOVE INTO MID TN TONIGHT. MCS GENERATION POSSIBLE.
THE BEST CHANCE OF ORGANIZED ACTIVITY IS WEST AND SOUTH OF CWFA
TONIGHT...AND KEPT CHANCE POPS RUNNING. LIKELY POPS FRI IN THE
SOUTH WITH GFS MCS TRACK INTO FRI NIGHT.

FRONT HOLDS STATIONARY IN OR NEAR MID TN THIS WEEKEND. THE CHANCE
OF SHOWERS AND THUNDERSTORMS WL CONTINUE.

.LONG TERM (NEXT WEEK)...
UPR RIDGE AND HEAT BUILDS FM THE SOUTHWEST MON-TUE...WITH STRONGER
CONVECTIVE SYSTEMS POSSIBLE. UPR RIDGE MOVES OVR MID TN TUE-THU
WITH WARM AND DRY CONDITIONS.

&&

.PRELIMINARY POINT TEMPS/POPS...
NASHVILLE      86  68  84  69 /  60  30  30  30
CLARKSVILLE    85  65  83  67 /  60  30  30  40
CROSSVILLE     81  65  82  65 /  70  40  30  20
COLUMBIA       86  68  85  69 /  60  30  70  30
LAWRENCEBURG   87  68  87  70 /  60  30  60  30
WAVERLY        86  67  83  68 /  60  30  30  40

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

04

Hazardous weather outlook, Jun 11, 5:16 AM CDT, 3 hours 2 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
516 AM CDT THU JUN 11 2009

TNZ005>011-022>034-056>066-075-077>080-093>095-121030-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-BENTON-
HOUSTON-HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE-
SMITH-JACKSON-PUTNAM-OVERTON-FENTRESS-PERRY-HICKMAN-LEWIS-
WILLIAMSON-MAURY-MARSHALL-RUTHERFORD-CANNON-DEKALB-WHITE-
CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE-
GILES-
516 AM CDT THU JUN 11 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

AN UPPER LEVEL DISTURBANCE WILL MOVE THROUGH THE MIDSTATE TODAY. THIS
FEATURE WILL GENERATE SCATTERED TO NUMEROUS THUNDERSTORMS OVER THE
MIDSTATE. A FEW OF THESE STORMS MAY BE SEVERE. THE MAIN THREAT
WILL BE DAMAGING WINDS AND HAIL.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE FOR THE REMAINDER
OF THE FORECAST PERIOD. A FEW THUNDERSTORMS IN THE SOUTHWEST HALF
OF THE AREA MAY BE SEVERE ON FRIDAY WITH DAMAGING WINDS AND HAIL.

.SPOTTER INFORMATION STATEMENT...

DUE TO THE BRIEF AND ISOLATED NATURE OF POSSIBLE SEVERE WEATHER...
SPOTTER ACTIVATION IS NOT ANTICIPATED.

JLM

In the hours before

Local storm report, Jun 11, 8:03 AM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
803 AM CDT THU JUN 11 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0740 AM     HAIL             10 WNW LINDEN           35.67N 88.01W
06/11/2009  E0.75 INCH       PERRY              TN   PARK/FOREST SRVC

            PENNY SIZE HAIL REPORTED BY MOUSETAIL LANDING STATE PARK
            OFFICE

&&

JLM

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 7:28 AM CDT	Severe Thunderstorm Warning	OHX	Perry	32 min
Jun 11, 8:01 AM CDT	Severe Thunderstorm Warning	OHX	Hickman, Humphreys, Perry	29 min
Jun 11, 8:42 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Williamson	33 min
Jun 11, 9:10 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Williamson	35 min
Jun 11, 9:38 AM CDT	Severe Thunderstorm Warning	OHX	Cannon, Rutherford, Wilson	52 min
Jun 11, 9:46 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Wilson	29 min
Jun 11, 9:56 AM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Grundy, Warren	49 min
Jun 11, 9:59 AM CDT	Tornado Warning	OHX	Cheatham, Montgomery, Robertson	31 min
Jun 11, 10:14 AM CDT	Severe Thunderstorm Warning	OHX	Cannon, Coffee, DeKalb, Grundy, Rutherford, Warren and 1 more	31 min
Jun 11, 10:19 AM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Grundy, Putnam, Smith, Van Buren, Warren and 1 more	41 min
Jun 11, 10:43 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Macon, Sumner, Trousdale	32 min
Jun 11, 10:48 AM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Putnam, Van Buren, White	42 min
Jun 11, 11:09 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Cumberland, Fentress, Jackson, Overton, Putnam	36 min
Jun 11, 11:33 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Fentress, Overton, Pickett	42 min

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.