Alert archive / Tennessee / Special Weather Statements in 2012

Special Weather Statement, NWS Nashville, TN

August 17, 2012Giles County, Lawrence County, Wayne County, Tennessee

NWS Nashville, TN issued this special weather statement at Aug 17, 2012, 12:47 AM CDT for Giles County, Lawrence County, Wayne County, Tennessee. It was in force for 28 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: Aug 17, 2012, 12:47 AM CDT (05:47 UTC)
Expired: Aug 17, 2012, 1:15 AM CDT
In force: 28 min
Issued by: NWS Nashville, TN

Counties Giles County, TN, Lawrence County, TN, Wayne County, TN

The radar

The Northeast Alabama radar (KHTX), 109 km from the middle of the area, began a volume at 05:49 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, 5.8 hours before the alert went out and 118 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: 1468 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1539 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 17, 12:46 AM CDT, 1 minute earlier.

Area forecast discussion, Aug 17, 12:46 AM CDT, 1 minute before

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Hazardous weather outlook, Aug 16, 6:21 PM CDT, 6 hours 26 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NASHVILLE TN
621 PM CDT THU AUG 16 2012

TNZ005>011-022>034-056>066-075-077>080-093>095-172330-
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-
621 PM CDT THU AUG 16 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TONIGHT

SCATTERED THUNDERSTORMS WILL DEVELOP FROM NORTHWEST TO SOUTHEAST
TONIGHT. A FEW STRONG STORMS ARE POSSIBLE...ESPECIALLY ACROSS
AREAS WEST OF I 65 THIS EVENING. GUSTY WINDS AND HAIL WILL BE
POSSIBLE.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ON FRIDAY...
ESPECIALLY FOR AREAS SOUTH AND EAST OF NASHVILLE. A COLD FRONT
WILL PRODUCE NUMEROUS THUNDERSTORMS. SOME MAY CONTAIN LARGE HAIL
AND DAMAGING STRAIGHT LINE WINDS. HEAVY DOWNPOURS WILL ALSO BE A
CONCERN WITH THE POTENTIAL FOR LOCALIZED FLASH FLOODING.

.SPOTTER CALL TO ACTION STATEMENT...

REPORTS FROM TRAINED WEATHER SPOTTERS MAY BE NEEDED.

SPOTTER THUNDERSTORM REPORTING CRITERIA...
TORNADO
FUNNEL CLOUD
FLOODING
HAIL >= 1/2 INCH
WINDS > 50 MPH (MEASURED)
STRUCTURAL DAMAGE
TREES OR POWER LINES DOWN

13

In the hours before

Local storm report, Aug 16, 11:25 PM CDT, 1 hour 22 minutes before

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Special weather statement, Aug 16, 11:56 PM CDT, 51 minutes before

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Local storm report, Aug 16, 11:59 PM CDT, 48 minutes before

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Local storm report, Aug 17, 12:30 AM CDT, 17 minutes before

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Local storm report, Aug 17, 12:43 AM CDT, 4 minutes before

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Special weather statement, Aug 17, 12:47 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 7:03 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Rutherford	42 min
Aug 16, 8:10 PM CDT	Special Weather Statement	OHX	Benton, Houston, Stewart	80 min
Aug 16, 8:21 PM CDT	Severe Thunderstorm Warning	OHX	Houston	24 min
Aug 16, 8:31 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Houston, Stewart	59 min
Aug 16, 8:46 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Houston, Humphreys	44 min
Aug 16, 8:49 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys	26 min
Aug 16, 9:18 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys, Montgomery, Stewart	42 min
Aug 16, 9:29 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson	46 min
Aug 16, 9:33 PM CDT	Special Weather Statement	OHX	Houston	57 min
Aug 16, 9:43 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Montgomery, Robertson, Sumner	47 min
Aug 16, 10:20 PM CDT	Special Weather Statement	OHX	Macon, Smith, Trousdale, Wilson	40 min
Aug 16, 10:29 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Macon, Robertson, Rutherford, Smith, Sumner and 2 more	46 min
Aug 16, 10:36 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Hickman, Marshall, Maury, Rutherford, Williamson	54 min
Aug 16, 10:45 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Humphreys, Lewis, Maury, Perry	45 min
Aug 16, 11:11 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Hickman, Marshall, Maury, Rutherford, Williamson	49 min
Aug 16, 11:24 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Cumberland, DeKalb, Giles and 13 more	36 min
Aug 16, 11:56 PM CDT	Special Weather Statement	OHX	DeKalb, Fentress, Overton, Putnam, White	64 min
Aug 17, 12:05 AM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Giles, Grundy, Lawrence and 7 more	40 min
Aug 17, 1:23 AM CDT	Areal Flood Advisory	OHX	Giles, Lawrence, Wayne	74 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.