Alert archive / Tennessee / Special Weather Statements in 2012

Special Weather Statement, NWS Nashville, TN

September 6, 2012Cheatham County, Robertson County, Tennessee

NWS Nashville, TN issued this special weather statement at Sep 6, 2012, 9:15 PM CDT for Cheatham County, Robertson County, Tennessee. It was in force for 30 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: Sep 6, 2012, 9:15 PM CDT (02:15 UTC)
Expired: Sep 6, 2012, 9:45 PM CDT
In force: 30 min
Issued by: NWS Nashville, TN

Counties Cheatham County, TN, Robertson County, TN

The radar

The Nashville radar (KOHX), 41 km from the middle of the area, began a volume at 02:16 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, 2.3 hours before the alert went out and 45 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: 1851 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1142 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 45 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 Sep 6, 9:00 PM CDT, 15 minutes earlier.

Area forecast discussion, Sep 6, 9:00 PM CDT, 15 minutes before

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Hazardous weather outlook, Sep 6, 6:41 PM CDT, 2 hours 34 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
641 PM CDT THU SEP 6 2012

TNZ005>011-022>034-056>066-075-077>080-093>095-072345-
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-
641 PM CDT THU SEP 6 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TONIGHT

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

AN AREA OF SHOWERS AND THUNDERSTORMS OVER WESTERN KENTUCKY THIS
EVENING WILL MOVE EASTWARD BUT WEAKEN AS IT APPROACHES NORTHWEST
MIDDLE TENNESSEE. ALTHOUGH THE ATMOSPHERE ACROSS MIDDLE TENNESSEE
IS MUCH LESS FAVORABLE FOR SHOWERS AND STORMS THAN AREAS FURTHER
TO THE NORTHWEST...A FEW SHOWERS AND STRONG STORMS CANNOT BE
RULED OUT AS THIS ACTIVITY MOVES INTO THE AREA. GUSTY WINDS WILL
BE THE MAIN HAZARD.

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

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR FRIDAY
AFTERNOON AND FRIDAY NIGHT ACROSS THE NORTHWEST HALF OF MIDDLE
TENNESSEE.

A STRONG COLD FRONT WILL APPROACH AND MOVE ACROSS MIDDLE TENNESSEE
FRIDAY NIGHT INTO SATURDAY. AHEAD OF THE FRONT...SCATTERED TO
NUMEROUS SHOWERS AND SOME STRONG TO SEVERE THUNDERSTORMS ARE
EXPECTED. THE HIGHEST RISK FOR SEVERE STORMS WILL BE ALONG AND
NORTH OF A LINE FROM LINDEN TO LAFAYETTE. DAMAGING WINDS AND LARGE
HAIL WILL BE THE MAIN HAZARDS...ALONG WITH HEAVY RAINFALL AND
FREQUENT LIGHTNING.

.SPOTTER CALL TO ACTION STATEMENT...

REPORTS FROM TRAINED WEATHER SPOTTERS MAY BE NEEDED ON FRIDAY
AFTERNOON AND FRIDAY NIGHT.

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

SHAMBURGER

In the hours before

Special weather statement, Sep 6, 7:16 PM CDT, 1 hour 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
716 PM CDT THU SEP 6 2012

TNZ005-006-022>025-070130-
BENTON-DICKSON-HOUSTON-HUMPHREYS-MONTGOMERY-STEWART-
716 PM CDT THU SEP 6 2012

...SIGNIFICANT WEATHER ADVISORY FOR BENTON...DICKSON...HOUSTON...
HUMPHREYS...MONTGOMERY AND STEWART COUNTIES...

AT 710 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM BENTON TO MURRAY TO
DRESDEN...EAST AT 50 MPH.

PEOPLE IN HOUSTON...MONTGOMERY...NORTHERN BENTON...NORTHERN
HUMPHREYS...STEWART AND WESTERN DICKSON COUNTIES...INCLUDING THE
CITIES OF CAMDEN...DOVER...WAVERLY...TENNESSEE RIDGE...ERIN...MCEWEN
AND CLARKSVILLE...SHOULD MONITOR THE WEATHER SITUATION CLOSELY.
LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE
ACTION SHOULD SEVERE WEATHER THREATEN.

HALF INCH SIZE HAIL...AND WINDS UP TO 55 MPH ARE EXPECTED WITH THESE
STORMS.

LAT...LON 3667 8786 3664 8784 3665 8726 3603 8740
      3604 8822 3612 8822 3626 8809 3636 8810
      3637 8801 3644 8807 3653 8804 3665 8807
      3668 8807

SHAMBURGER

Special weather statement, Sep 6, 8:27 PM CDT, 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
827 PM CDT THU SEP 6 2012

TNZ005-006-022>025-070215-
BENTON-DICKSON-HOUSTON-HUMPHREYS-MONTGOMERY-STEWART-
827 PM CDT THU SEP 6 2012

...SIGNIFICANT WEATHER ADVISORY FOR BENTON...DICKSON...HOUSTON...
HUMPHREYS...MONTGOMERY AND STEWART COUNTIES...

AT 826 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 11 MILES WEST OF
FORT CAMPBELL NORTH TO 6 MILES WEST OF WAVERLY...MOVING EAST AT 35
MPH.

THESE STORMS WILL BE NEAR...
  WAVERLY BY 835 PM CDT.
  MCEWEN BY 845 PM CDT.
  CLARKSVILLE BY 855 PM CDT.
  DICKSON BY 910 PM CDT.

PENNY SIZE HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH THESE
STORMS.

LAT...LON 3667 8786 3664 8784 3665 8712 3656 8714
      3646 8712 3642 8715 3643 8718 3635 8728
      3632 8727 3601 8738 3601 8822 3612 8822
      3626 8809 3636 8810 3637 8801 3644 8807
      3655 8804 3667 8808

SHAMBURGER

Special weather statement, Sep 6, 9:15 PM 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
Sep 6, 7:16 PM CDT	Special Weather Statement	OHX	Benton, Houston, Humphreys, Montgomery, Stewart	74 min
Sep 6, 7:44 PM CDT	Severe Thunderstorm Warning	OHX	Stewart	46 min
Sep 6, 8:27 PM CDT	Special Weather Statement	OHX	Benton, Dickson, Houston, Humphreys, Montgomery, Stewart	48 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.