Alert archive / Tennessee / Special Weather Statements in 2012

Special Weather Statement, NWS Nashville, TN

July 7, 2012Cheatham County, Tennessee

NWS Nashville, TN issued this special weather statement at Jul 7, 2012, 11:21 PM CDT for Cheatham County, Tennessee. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 7, 2012, 11:21 PM CDT (04:21 UTC)
Expired: Jul 7, 2012, 11:45 PM CDT
In force: 24 min
Issued by: NWS Nashville, TN

County Cheatham County, TN

The radar

The Nashville radar (KOHX), 46 km from the middle of the area, began a volume at 04:24 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 00:00Z, 4.4 hours before the alert went out and 43 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: 1967 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 2142 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

496 
WWUS84 KOHX 080421
SPSOHX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1121 PM CDT SAT JUL 7 2012

TNZ025>027-080445-
CHEATHAM-DAVIDSON-DICKSON-
1121 PM CDT SAT JUL 7 2012

...SIGNIFICANT WEATHER ADVISORY FOR CHEATHAM...DAVIDSON AND DICKSON
COUNTIES...

AT 1118 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM 7 MILES NORTHWEST OF BELLE MEADE...OR 8 MILES
WEST OF NASHVILLE...MOVING NORTHWEST AT 20 MPH.

PEOPLE IN CENTRAL CHEATHAM...NORTHEASTERN DICKSON AND WESTERN
DAVIDSON COUNTIES...INCLUDING THE CITY OF ASHLAND CITY...SHOULD
MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS
AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER
THREATEN.

SMALL HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THIS STORM.

LAT...LON 3611 8729 3640 8715 3626 8675 3607 8688

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 11:27 PM CDT	Special Weather Statement	OHX	Davidson	63 min
Jul 7, 11:44 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Montgomery	46 min
Jul 7, 11:53 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson	20 min
Jul 8, 12:19 AM CDT	Severe Thunderstorm Warning	OHX	Dickson, Houston, Montgomery, Stewart	41 min
Jul 8, 12:32 AM CDT	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys	28 min
Jul 8, 12:51 AM CDT	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys, Stewart	54 min
Jul 8, 1:27 AM CDT	Flash Flood Warning	OHX	Dickson, Humphreys	116 min
Jul 8, 1:42 AM CDT	Severe Thunderstorm Warning	OHX	Benton, Humphreys	63 min
Jul 8, 1:47 AM CDT	Special Weather Statement	OHX	Houston	58 min
Jul 8, 2:35 AM CDT	Special Weather Statement	OHX	Stewart	25 min
Jul 8, 3:09 AM CDT	Special Weather Statement	OHX	Stewart	66 min
Jul 8, 2:13 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Humphreys	32 min
Jul 8, 3:17 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	28 min
Jul 8, 3:45 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	30 min
Jul 8, 4:00 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Maury, Williamson	30 min
Jul 8, 4:14 PM CDT	Special Weather Statement	OHX	Davidson	31 min
Jul 8, 4:17 PM CDT	Special Weather Statement	OHX	Davidson	28 min
Jul 8, 4:31 PM CDT	Special Weather Statement	OHX	Williamson	29 min
Jul 8, 4:49 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Williamson	41 min
Jul 8, 4:52 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson	38 min
Jul 8, 5:10 PM CDT	Severe Thunderstorm Warning	OHX	Smith, Trousdale, Wilson	35 min
Jul 8, 5:15 PM CDT	Severe Thunderstorm Warning	OHX	Wilson	45 min
Jul 8, 5:26 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury, Rutherford, Williamson	23 min
Jul 8, 5:43 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Coffee, Rutherford, Wilson	62 min
Jul 8, 5:44 PM CDT	Severe Thunderstorm Warning	OHX	Smith, Trousdale, Wilson	46 min
Jul 8, 6:02 PM CDT	Severe Thunderstorm Warning	OHX	Smith, Wilson	32 min
Jul 8, 6:15 PM CDT	Areal Flood Advisory	OHX	Rutherford, Smith, Wilson	66 min
Jul 8, 6:25 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Sumner, Trousdale	35 min
Jul 8, 6:43 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Overton	36 min
Jul 8, 6:52 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Sumner, Trousdale	27 min

Nearby

Special Weather Statements in Tennessee, 2012 Every special weather statement in 2012

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.