Alert archive / Tennessee / Special Weather Statements in 2012

Special Weather Statement, NWS Nashville, TN

December 17, 2012Fentress County, Tennessee

NWS Nashville, TN issued this special weather statement at Dec 17, 2012, 4:28 PM CST for Fentress County, Tennessee. It was in force for 32 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: Dec 17, 2012, 4:28 PM CST (22:28 UTC)
Expired: Dec 17, 2012, 5:00 PM CST
In force: 32 min
Issued by: NWS Nashville, TN

County Fentress County, TN

The radar

The Knoxville radar (KMRX), 129 km from the middle of the area, began a volume at 22:31 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, 10.5 hours before the alert went out and 162 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: 100 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 447 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 185 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 Dec 17, 4:06 PM CST, 22 minutes earlier.

Area forecast discussion, Dec 17, 4:06 PM CST, 22 minutes before

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Hazardous weather outlook, Dec 17, 5:20 AM CST, 11 hours 8 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
520 AM CST MON DEC 17 2012

TNZ005>011-022>034-056>066-075-077>080-093>095-181130-
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-
520 AM CST MON DEC 17 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT...

A COLD FRONT WILL BRING SHOWERS AND THUNDERSTORMS TO MIDDLE
TENNESSEE THIS AFTERNOON. A FEW OF THE THUNDERSTORMS COULD BECOME
STRONG TO SEVERE...WITH LARGE HAIL AND STRONG GUSTY WINDS BEING
THE MAIN THREATS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

ANOTHER ROUND OF THUNDERSTORMS CAN BE EXPECTED WEDNESDAY NIGHT
INTO THURSDAY IN ADVANCE OF AN APPROACHING STRONG COLD FRONT. SOME
OF THESE THUNDERSTORMS COULD BECOME STRONG TO SEVERE...WITH
DAMAGING WINDS BEING THE MAIN THREAT.

.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

AL

In the hours before

Local storm report, Dec 17, 3:06 PM CST, 1 hour 22 minutes before

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Special weather statement, Dec 17, 3:12 PM CST, 1 hour 16 minutes before

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Special weather statement, Dec 17, 3:21 PM CST, 1 hour 7 minutes before

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Special weather statement, Dec 17, 3:34 PM CST, 54 minutes before

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Special weather statement, Dec 17, 4:12 PM CST, 16 minutes before

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Special weather statement, Dec 17, 4:28 PM CST, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
428 PM CST MON DEC 17 2012

TNZ011-034-172300-
FENTRESS-PICKETT-
428 PM CST MON DEC 17 2012

...SIGNIFICANT WEATHER ADVISORY FOR FENTRESS AND PICKETT COUNTIES...

AT 427 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR JAMESTOWN...MOVING EAST AT 35 MPH. THERE IS
THE POTENTIAL FOR ADDITIONAL STRONG THUNDERSTORMS TO DEVELOP AND
MOVE ACROSS FENTRESS AND PICKETT COUNTIES THROUGH 500 PM CST ALSO.

SMALL HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH THIS STORM.

LAT...LON 3637 8469 3636 8473 3633 8474 3632 8479
      3629 8479 3629 8487 3624 8488 3621 8491
      3617 8490 3635 8512 3654 8498 3661 8482
      3661 8479 3658 8476 3641 8466

31

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 17, 12:08 PM CST	Special Weather Statement	OHX	Robertson	67 min
Dec 17, 12:13 PM CST	Special Weather Statement	OHX	Benton, Dickson, Houston, Stewart	47 min
Dec 17, 12:21 PM CST	Severe Thunderstorm Warning	OHX	Benton, Houston, Stewart	24 min
Dec 17, 12:22 PM CST	Severe Thunderstorm Warning	OHX	Benton, Houston, Stewart	23 min
Dec 17, 1:06 PM CST	Special Weather Statement	OHX	Benton, Humphreys	24 min
Dec 17, 1:16 PM CST	Special Weather Statement	OHX	Montgomery, Robertson, Sumner	59 min
Dec 17, 1:39 PM CST	Special Weather Statement	OHX	Dickson, Hickman, Humphreys	51 min
Dec 17, 2:26 PM CST	Special Weather Statement	OHX	Cheatham, Davidson, Wilson	64 min
Dec 17, 2:33 PM CST	Special Weather Statement	OHX	Macon, Trousdale	27 min
Dec 17, 2:53 PM CST	Severe Thunderstorm Warning	OHX	Clay, Macon	37 min
Dec 17, 3:04 PM CST	Special Weather Statement	OHX	Macon, Trousdale	56 min
Dec 17, 3:12 PM CST	Special Weather Statement	OHX	Maury, Rutherford, Williamson	63 min
Dec 17, 3:21 PM CST	Special Weather Statement	OHX	Giles, Lawrence, Wayne	54 min
Dec 17, 3:34 PM CST	Special Weather Statement	OHX	Jackson, Smith, Wilson	56 min
Dec 17, 3:41 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Marshall, Rutherford	34 min
Dec 17, 4:12 PM CST	Special Weather Statement	OHX	Coffee	63 min
Dec 17, 4:39 PM CST	Special Weather Statement	OHX	Giles	66 min
Dec 17, 5:17 PM CST	Special Weather Statement	OHX	Van Buren	28 min
Dec 17, 5:24 PM CST	Severe Thunderstorm Warning	OHX	Grundy, Van Buren, Warren	20 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.