Alert archive / Tennessee / Special Weather Statements in 2014

Special Weather Statement, NWS Nashville, TN

October 9, 20144 counties in Tennessee

NWS Nashville, TN issued this special weather statement at Oct 9, 2014, 10:13 AM CDT for 4 counties in 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: Oct 9, 2014, 10:13 AM CDT (15:13 UTC)
Expired: Oct 9, 2014, 11:00 AM CDT
In force: 47 min
Issued by: NWS Nashville, TN

Counties Clay County, TN, Jackson County, TN, Overton County, TN, Pickett County, TN

The radar

The Nashville radar (KOHX), 123 km from the middle of the area, began a volume at 15:12 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, 3.2 hours before the alert went out and 129 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: 495 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 822 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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 Oct 9, 8:59 AM CDT, 1 hour 14 minutes earlier.

Area forecast discussion, Oct 9, 8:59 AM CDT, 1 hour 14 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
859 AM CDT THU OCT 9 2014

.UPDATE...FOR MORNING DISCUSSION.

&&

.DISCUSSION...

HAD TO MAKE A COUPLE OF TWEAKS TO UP POPS ACROSS THE NORTH WITH
THE ONGOING CONVECTION. THESE STORMS ARE NOT PARTICULARLY
INTENSE...BUT A FEW CORES HAVE BEEN HIGH ENOUGH TO WARRANT AT
LEAST ONE REPORT OF PEA SIZED HAIL IN ROBERTSON COUNTY. THIS IS
DUE TO DECENT MID-LEVEL LAPSE RATES ACROSS THE AREA /6.5-7 DEGREES
C/ AND POSSIBLY SOME WEAK FORCING DUE TO THIS BOUNDARY STATIONED
JUST OFF TO OUR NORTH. WITH ALL OF THIS...SMALL HAIL AND EVEN THE
POTENTIAL FOR A STRONG WIND GUST WILL LIKELY PERSIST THROUGH THE
MORNING HOURS AS THESE STORMS TRAVERSE NORTHERN MIDDLE TN.

UNGER

&&

.PREV DISCUSSION... /ISSUED 629 AM CDT THU OCT 9 2014/

AVIATION...
12Z TAFS...WARM FRONT LIFTING ACROSS THE AREA WILL PRODUCE SCT
SHRA/TSRA. COVERAGE AND LOCATION UNCERTAIN...SO GOING WITH VC IN
TAFS. OTHERWISE...VFR WITH MAINLY S WINDS AROUND 5KT.

13

&&

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

&&

27

Hazardous weather outlook, Oct 9, 5:00 AM CDT, 5 hours 13 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
500 AM CDT THU OCT 9 2014

TNZ005>011-023>034-056>066-075-077>080-093>095-101000-
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 THU OCT 9 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT.

ISOLATED STRONG THUNDERSTORMS WILL BE POSSIBLE TODAY. MAIN CONCERNS
WITH STRONG THUNDERSTORMS THAT DO DEVELOP WILL BE SMALL HAIL...GUSTY
WINDS...BRIEF HEAVY RAINFALL...AND FREQUENT CLOUD TO GROUND LIGHTNING
STRIKES.

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

SOME STRONG THUNDERSTORMS WILL BE POSSIBLE FROM FRIDAY THROUGH
TUESDAY. SOME SEVERE THUNDERSTORMS WILL BE POSSIBLE MONDAY NIGHT
INTO TUESDAY AS A FRONTAL SYSTEM MOVES ACROSS THE MID STATE.
MAIN CONCERNS WITH STRONG TO SEVERE THUNDERSTORMS THAT DO DEVELOP
WILL BE HAIL...GUSTY TO DAMAGING WINDS...BRIEF HEAVY RAINFALL...
AND FREQUENT CLOUD TO GROUND LIGHTNING STRIKES. LOCALLY HEAVY
RAINFALL WILL ALSO BE POSSIBLE...MAINLY MONDAY INTO TUESDAY.

.SPOTTER CALL TO ACTION STATEMENT...

EVEN THOUGH ANY SEVERE 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 9, 8:29 AM CDT, 1 hour 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
829 AM CDT THU OCT 9 2014

TNZ007-008-091415-
ROBERTSON-SUMNER-
829 AM CDT THU OCT 9 2014

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

AT 827 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A STRONG THUNDERSTORM 9 MILES SOUTHEAST OF GUTHRIE...MOVING EAST AT
30 MPH.

SOME LOCATIONS IN THE PATH INCLUDE ADAMS...CEDAR HILL...
SPRINGFIELD...CROSS PLAINS...ORLINDA...BLACK JACK...MITCHELLVILLE AND
PORTLAND.

SMALL HAIL...AND WINDS 35 TO 45 MPH ARE EXPECTED WITH THIS STORM.

LAT...LON 3633 8657 3637 8673 3641 8675 3638 8679
      3646 8712 3665 8711 3666 8659 3664 8655
      3666 8652 3665 8647

07

Special weather statement, Oct 9, 9:04 AM CDT, 1 hour 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
904 AM CDT THU OCT 9 2014

TNZ007>009-028-029-091445-
MACON-ROBERTSON-SUMNER-TROUSDALE-WILSON-
904 AM CDT THU OCT 9 2014

...SIGNIFICANT WEATHER ADVISORY FOR MACON...ROBERTSON...SUMNER...
TROUSDALE AND WILSON COUNTIES...

AT 859 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A STRONG THUNDERSTORM NEAR PORTLAND...MOVING EAST AT 35 MPH.

SOME LOCATIONS IN THE PATH INCLUDE COTTONTOWN...PORTLAND...OAK
GROVE...BETHPAGE...CASTALIAN SPRINGS...WESTMORELAND...HARTSVILLE AND
LAFAYETTE.

SMALL HAIL...AND WINDS 35 TO 45 MPH ARE EXPECTED WITH THIS STORM.

LAT...LON 3664 8657 3665 8653 3663 8594 3629 8613
      3637 8673 3639 8674 3666 8667 3666 8659

Special weather statement, Oct 9, 9:34 AM CDT, 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
934 AM CDT THU OCT 9 2014

TNZ009-010-029>031-091515-
CLAY-JACKSON-MACON-SMITH-TROUSDALE-
934 AM CDT THU OCT 9 2014

...SIGNIFICANT WEATHER ADVISORY FOR CLAY...JACKSON...MACON...SMITH
AND TROUSDALE COUNTIES...

AT 932 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A STRONG THUNDERSTORM NEAR HARTSVILLE...MOVING EAST AT 35 MPH.

SOME LOCATIONS IN THE PATH INCLUDE DIXON SPRINGS...HARTSVILLE...
LAFAYETTE...PLEASANT SHADE...RED BOILING SPRING...WHITLEYVILLE AND
MOSS.

NICKEL SIZE HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3662 8551 3623 8560 3629 8614 3632 8616
      3632 8619 3634 8621 3664 8612

Special weather statement, Oct 9, 10:13 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1013 AM CDT THU OCT 9 2014

TNZ010-011-031>033-091600-
CLAY-JACKSON-OVERTON-PICKETT-PUTNAM-
1013 AM CDT THU OCT 9 2014

...SIGNIFICANT WEATHER ADVISORY FOR CLAY...JACKSON...OVERTON...
PICKETT AND PUTNAM COUNTIES...

AT 1010 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A STRONG THUNDERSTORM NEAR GAINESBORO...MOVING EAST AT
35 MPH.

SOME LOCATIONS IN THE PATH INCLUDE WHITLEYVILLE...GAINESBORO...
STANDING STONE STATE PARK AND LIVINGSTON.

NICKEL SIZE HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3662 8507 3651 8508 3650 8509 3641 8510
      3640 8512 3629 8512 3624 8510 3614 8510
      3615 8511 3614 8512 3624 8576 3662 8568
      3662 8548 3663 8511

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 8, 7:22 PM CDT	Areal Flood Advisory	OHX	Giles	113 min
Oct 9, 8:29 AM CDT	Special Weather Statement	OHX	Robertson	46 min
Oct 9, 9:04 AM CDT	Special Weather Statement	OHX	Macon, Sumner, Trousdale	41 min
Oct 9, 9:34 AM CDT	Special Weather Statement	OHX	Clay, Jackson, Macon, Trousdale	41 min
Oct 9, 9:48 AM CDT	Severe Thunderstorm Warning	OHX	Macon, Smith, Trousdale	27 min
Oct 9, 10:51 AM CDT	Special Weather Statement	OHX	Fentress, Overton, Pickett	39 min
Oct 9, 10:56 AM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	23 min
Oct 9, 11:21 AM CDT	Special Weather Statement	OHX	DeKalb	24 min
Oct 9, 6:52 PM CDT	Special Weather Statement	OHX	Dickson	38 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.