Alert archive / Tennessee / Special Weather Statements in 2014

Special Weather Statement, NWS Nashville, TN

July 27, 2014Grundy County, Warren County, Tennessee

NWS Nashville, TN issued this special weather statement at Jul 27, 2014, 11:43 PM CDT for Grundy County, Warren County, Tennessee. It was in force for 47 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 27, 2014, 11:43 PM CDT (04:43 UTC)
Expired: Jul 28, 2014, 12:30 AM CDT
In force: 47 min
Issued by: NWS Nashville, TN

Counties Grundy County, TN, Warren County, TN

The radar

The Northeast Alabama radar (KHTX), 70 km from the middle of the area, began a volume at 04:43 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, 4.7 hours before the alert went out and 111 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: 3837 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1139 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 171 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 10.2

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 Jul 27, 6:23 PM CDT, 5 hours 20 minutes earlier.

Area forecast discussion, Jul 27, 6:23 PM CDT, 5 hours 20 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
623 PM CDT SUN JUL 27 2014

.UPDATE...FOR 00Z AVIATION FORECASTS.

&&

.AVIATION...BELIEVE SCATTERED THUNDERSTORMS WILL BECOME MORE
PRONOUNCED IN THE CSV VICINITY BTWN 03Z AND 05Z, AS SFC COLD FRONT
PUSHES INTO THAT AREA. EXPECT MAINLY JUST ISOLATED STORMS FURTHER
WEST TOWARD BNA AND CKV.

OF COURSE, IF A TSTM MOVES ACROSS ANY OF THE AREA TERMINALS
TONIGHT YOU CAN EXPECT A BRIEF PERIOD OF MVFR, AND POSSIBLY IFR,
CONDITIONS. OTHERWISE, LOOK FOR VFR THROUGH THE FORECAST PERIOD.

GUSTY WEST SFC WINDS ARE FORECAST THROUGH THIS EVENING, AHEAD OF
THE FRONT, DIMINISHING AND BECOMING NORTHWESTERLY OVERNIGHT.
HOWEVER, NORTHWEST SFC WINDS WILL BECOME GUSTY ONCE AGAIN DURING
THE DAYLIGHT HOURS, WITH OCCASIONAL GUSTS TO NR 20 KTS.

&&

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

&&

19

Hazardous weather outlook, Jul 27, 7:27 PM CDT, 4 hours 16 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
727 PM CDT SUN JUL 27 2014

TNZ005>011-023>034-056>066-075-077>080-093>095-290030-
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-
727 PM CDT SUN JUL 27 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TONIGHT.

SEVERE THUNDERSTORMS WILL BE POSSIBLE THROUGH 1 AM TONIGHT FOR ALL
OF MIDDLE TENNESSEE. DAMAGING WIND GUSTS...LARGE HAIL AND ISOLATED
TORNADOES WILL BE POSSIBLE. WHILE ALL OF MIDDLE TENNESSEE WILL BE
THREATENED...THE BEST CHANCE FOR THIS SEVERE WEATHER WILL BE ON
THE CUMBERLAND PLATEAU.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER CALL TO ACTION STATEMENT...

REPORTS FROM TRAINED WEATHER SPOTTERS MAY BE NEEDED THIS AFTERNOON
AND TONIGHT.

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

27

In the hours before

Local storm report, Jul 27, 11:29 PM CDT, 14 minutes before

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Local storm report, Jul 27, 11:31 PM CDT, 12 minutes before

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Local storm report, Jul 27, 11:34 PM CDT, 9 minutes before

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Local storm report, Jul 27, 11:35 PM CDT, 8 minutes before

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Local storm report, Jul 27, 11:36 PM CDT, 7 minutes before

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Special weather statement, Jul 27, 11:43 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1143 PM CDT SUN JUL 27 2014

TNZ078>080-280530-
GRUNDY-VAN BUREN-WARREN-
1143 PM CDT SUN JUL 27 2014

...SIGNIFICANT WEATHER ADVISORY FOR GRUNDY...VAN BUREN AND WARREN
COUNTIES...

AT 1139 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 13 MILES
SOUTH OF SPENCER TO 11 MILES SOUTH OF MCMINNVILLE TO 10 MILES
NORTHEAST OF MANCHESTER...MOVING SOUTHEAST AT 50 MPH.

SOME LOCATIONS IN THE PATH INCLUDE VIOLA...MORRISON...BEERSHEBA
SPRINGS...ALTAMONT...COALMONT...GRUETLI-LAAGER AND PALMER.

WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS.

LAT...LON 3526 8571 3551 8588 3554 8588 3556 8593
      3571 8600 3573 8599 3567 8532 3554 8546
      3553 8559 3549 8553 3544 8553 3539 8548
      3531 8556 3530 8566 3528 8570

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 7:55 PM CDT	Severe Thunderstorm Warning	OHX	Robertson, Sumner	35 min
Jul 27, 8:02 PM CDT	Special Weather Statement	OHX	Robertson	28 min
Jul 27, 8:09 PM CDT	Special Weather Statement	OHX	Robertson	21 min
Jul 27, 8:29 PM CDT	Special Weather Statement	OHX	Macon, Smith, Sumner, Trousdale	31 min
Jul 27, 8:34 PM CDT	Special Weather Statement	OHX	Robertson	26 min
Jul 27, 8:39 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Smith, Sumner, Trousdale	36 min
Jul 27, 8:41 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Robertson, Sumner	34 min
Jul 27, 9:07 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Robertson, Sumner, Wilson	23 min
Jul 27, 9:17 PM CDT	Special Weather Statement	OHX	Clay, Fentress, Jackson, Overton, Pickett, Putnam	43 min
Jul 27, 9:23 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Putnam	37 min
Jul 27, 9:29 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, DeKalb, Rutherford, Smith, Wilson	46 min
Jul 27, 9:33 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	42 min
Jul 27, 9:53 PM CDT	Severe Thunderstorm Warning	OHX	Fentress	21 min
Jul 27, 9:58 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Humphreys, Maury, Perry, Williamson	47 min
Jul 27, 10:07 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Rutherford, Warren, White, Wilson	38 min
Jul 27, 10:12 PM CDT	Special Weather Statement	OHX	Cumberland, Van Buren, White	48 min
Jul 27, 10:35 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Cumberland, Van Buren, Warren, White	40 min
Jul 27, 11:07 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Coffee, Grundy, Van Buren, Warren	38 min
Jul 28, 12:28 AM CDT	Severe Thunderstorm Warning	OHX	Grundy	32 min

Nearby

Special Weather Statements in Tennessee, 2014 Every special weather statement 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.