Alert archive / Tennessee / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 184, NWS Nashville, TN

October 8, 20144 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Oct 8, 2014, 12:11 AM CDT for 4 counties in Tennessee. It was in force for 49 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 8, 2014, 12:11 AM CDT (05:11 UTC)
Expired: Oct 8, 2014, 1:00 AM CDT
In force: 49 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Smith County, TN, Sumner County, TN, Trousdale County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 32 km from the middle of the area, began a volume at 05:10 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, 5.2 hours before the alert went out and 40 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: 731 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 918 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 248 m²/s²
0-3 km storm-relative helicity: 319 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 6.6

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 8, 12:08 AM CDT, 3 minutes earlier.

Area forecast discussion, Oct 8, 12:08 AM CDT, 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1208 AM CDT WED OCT 8 2014

.AVIATION...
CURRENT LINE OF CONVECTION MOVING THROUGH THE MID-STATE AS OF 05Z
WILL IMPACT VIS AND CIGS AT CKV...BNA...AND CSV EARLY IN THE
FORECAST. DURATION SHOULD BE BRIEF AS THE LINE OF STORMS IS
MOVING ABOUT 30KTS TO THE SOUTHEAST. AFTER THE LINE MOVES
THROUGH...EXPECT VFR FOR THE REMAINDER OF THE TAF PERIOD.

&&

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

&&

05

Hazardous weather outlook, Oct 7, 5:00 AM CDT, 19 hours 11 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
500 AM CDT TUE OCT 7 2014

TNZ005>011-023>034-056>066-075-077>080-093>095-081000-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-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-
500 AM CDT TUE OCT 7 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT.

SOME STRONG THUNDERSTORMS WILL BE POSSIBLE TODAY. MAIN CONCERNS
WILL BE SMALL HAIL...GUSTY WINDS...AND BRIEF HEAVY DOWNPOURS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER CALL TO ACTION STATEMENT...

EVEN THOUGH ANY STRONG THUNDERSTORMS ARE EXPECTED TO BE BRIEF AND
ISOLATED, SPOTTERS ARE ENCOURAGED TO CLOSELY MONITOR WEATHER
CONDITIONS AND BE PREPARED TO CALL IN ANYTHING REACHING REPORTING
CRITERIA.

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

31

In the hours before

Special weather statement, Oct 7, 10:57 PM CDT, 1 hour 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1057 PM CDT TUE OCT 7 2014

TNZ006>008-080445-
MONTGOMERY-ROBERTSON-SUMNER-
1057 PM CDT TUE OCT 7 2014

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEAST MONTGOMERY...ROBERTSON
AND SUMNER COUNTIES...

AT 1054 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM PEMBROKE TO
FRANKLIN...MOVING SOUTHEAST AT 40 MPH.

PEOPLE IN AND AROUND BLACK JACK...ORLINDA...MITCHELLVILLE...ADAMS...
PORTLAND...CEDAR HILL...CROSS PLAINS...OAK GROVE...SPRINGFIELD AND
WHITE HOUSE SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR
POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD
SEVERE WEATHER THREATEN.

PENNY SIZE HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE
STORMS.

LAT...LON 3664 8620 3651 8621 3646 8623 3645 8627
      3631 8630 3631 8636 3636 8636 3631 8640
      3634 8644 3628 8652 3632 8655 3626 8657
      3624 8662 3634 8672 3641 8675 3635 8682
      3639 8690 3637 8698 3647 8713 3664 8729

SHAMBURGER

Local storm report, Oct 7, 11:46 PM CDT, 25 minutes before

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Local storm report, Oct 7, 11:49 PM CDT, 22 minutes before

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Local storm report, Oct 8, 12:03 AM CDT, 8 minutes before

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Local storm report, Oct 8, 12:04 AM CDT, 7 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 7, 10:57 PM CDT	Special Weather Statement	OHX	Robertson, Sumner	48 min
Oct 7, 11:08 PM CDT	Severe Thunderstorm Warning	OHX	Robertson	37 min
Oct 7, 11:39 PM CDT	Severe Thunderstorm Warning	OHX	Robertson, Sumner	33 min
Oct 8, 12:35 AM CDT	Areal Flood Advisory	OHX	Sumner	115 min
Oct 8, 12:59 AM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Smith, Sumner, Wilson	46 min
Oct 8, 1:08 AM CDT	Special Weather Statement	OHX	Cheatham, Davidson, Dickson	37 min
Oct 8, 1:42 AM CDT	Special Weather Statement	OHX	Cannon, Davidson, Rutherford, Williamson, Wilson	63 min
Oct 8, 1:44 AM CDT	Special Weather Statement	OHX	DeKalb, Van Buren, Warren, White	61 min
Oct 8, 2:38 AM CDT	Special Weather Statement	OHX	Hickman, Lewis, Maury, Rutherford	37 min
Oct 8, 2:41 AM CDT	Special Weather Statement	OHX	Van Buren, Warren	49 min
Oct 8, 3:11 AM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Maury	34 min
Oct 8, 3:21 AM CDT	Special Weather Statement	OHX	Bedford, Coffee, Grundy	39 min
Oct 8, 3:42 AM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Lewis, Maury	33 min
Oct 8, 4:11 AM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Marshall, Maury	34 min
Oct 8, 6:48 PM CDT	Special Weather Statement	OHX	Giles	42 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2014 Every severe thunderstorm warning in 2014

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.