Alert archive / Tennessee / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 332, NWS Nashville, TN

October 12, 2010Davidson County, Rutherford County, Williamson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Oct 12, 2010, 2:51 PM CDT for Davidson County, Rutherford County, Williamson County, Tennessee. It was in force for 39 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 12, 2010, 2:51 PM CDT (19:51 UTC)
Expired: Oct 12, 2010, 3:30 PM CDT
In force: 39 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Davidson County, TN, Rutherford County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 33 km from the middle of the area, began a volume at 19:51 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

Nashville Metro, TN (KBNA), launched 12:00Z, 7.9 hours before the alert went out and 20 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: 89 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 1645 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 46 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 Nashville, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 12, 10:29 AM CDT, 4 hours 22 minutes earlier.

Area forecast discussion, Oct 12, 10:29 AM CDT, 4 hours 22 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1029 AM CDT TUE OCT 12 2010

.UPDATE...UPDATED THE ZONE PACKAGE TO REMOVE MORNING WORDING. PARAMETERS
OF THE FORECAST ARE UNCHANGED.

CURRENT RADAR ACTIVITY IS RATHER SPARSE OVER THE REGION.
HOWEVER...SIGNIFICANT DESTABILIZATION IS EXPECTED BY AFTERNOON
WITH SCATTERED TSTMS EXPECTED TO DEVELOP OVER THE AREA. SVR TSTMS
SEEMS A REMOTE POSSIBILITY GIVEN THE LACK OF 0-3 KM SHEAR. HOWEVER...
DESTABILIZATION THIS AFTERNOON MAY SUPPORT STRONG TSTMS WITH GUSTY
WINDS AND NON-DESTRUCTIVE HAIL SIZES.

&&

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

JLM

Hazardous weather outlook, Oct 12, 4:28 AM CDT, 10 hours 23 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
428 AM CDT TUE OCT 12 2010

TNZ005>011-022>034-056>066-075-077>080-093>095-131030-
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-DE KALB-WHITE-
CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE-
GILES-
428 AM CDT TUE OCT 12 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY AND
TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THE CHANCE OF SHOWERS AND THUNDERSTORMS WILL CONTINUE ON WEDNESDAY
AS A COLD FRONT MOVES INTO THE REGION. THE PROBABILITY FOR
WIDESPREAD HAZARDOUS WEATHER IS LOW.

04

In the hours before

Local storm report, Oct 12, 1:08 PM CDT, 1 hour 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
108 PM CDT TUE OCT 12 2010

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

0107 PM     HAIL             12 N CENTERVILLE        35.97N 87.45W
10/12/2010  M1.00 INCH       HICKMAN            TN   AMATEUR RADIO

            QUARTER SIZE HAIL REPORTED BY SPOTTER

&&

MDAVIS

Local storm report, Oct 12, 2:14 PM CDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
214 PM CDT TUE OCT 12 2010

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

0115 PM     HAIL             CENTERVILLE             35.79N 87.45W
10/12/2010  E0.25 INCH       HICKMAN            TN   EMERGENCY MNGR

            ON THE SQUARE IN CENTERVILLE

&&

RTROUTMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 12, 1:11 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Williamson	21 min
Oct 12, 1:24 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Maury	36 min
Oct 12, 2:14 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Williamson	46 min
Oct 12, 2:55 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Marshall, Maury, Williamson	29 min
Oct 12, 3:46 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Maury	59 min
Oct 12, 4:16 PM CDT	Severe Thunderstorm Warning	OHX	Smith	44 min
Oct 12, 4:21 PM CDT	Flash Flood Warning	OHX	Lewis	3 hr
Oct 12, 4:31 PM CDT	Severe Thunderstorm Warning	OHX	Lewis	30 min
Oct 12, 4:59 PM CDT	Severe Thunderstorm Warning	OHX	Lewis	31 min
Oct 12, 5:15 PM CDT	Areal Flood Advisory	OHX	Smith, Wilson	2 hr
Oct 12, 5:18 PM CDT	Severe Thunderstorm Warning	OHX	Lewis, Perry	20 min
Oct 12, 5:27 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence	19 min
Oct 12, 5:37 PM CDT	Areal Flood Advisory	OHX	Lawrence, Lewis, Maury	3 hr
Oct 12, 5:44 PM CDT	Severe Thunderstorm Warning	OHX	Marshall	11 min
Oct 12, 6:26 PM CDT	Flash Flood Warning	OHX	Lewis, Perry, Wayne	3 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2010 Every severe thunderstorm warning in 2010

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.