Alert archive / Tennessee / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 130, NWS Morristown, TN

July 8, 2014Monroe County, Polk County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 8, 2014, 5:59 PM EDT for Monroe County, Polk County, Tennessee. It was in force for 34 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: Jul 8, 2014, 5:59 PM EDT (21:59 UTC)
Expired: Jul 8, 2014, 6:33 PM EDT
In force: 34 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Monroe County, TN, Polk County, TN

The radar

The Knoxville radar (KMRX), 133 km from the middle of the area, began a volume at 22:01 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, 10.0 hours before the alert went out and 221 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: 582 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 1160 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -55 m²/s²
0-3 km storm-relative helicity: -14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Morristown, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 8, 2:55 PM EDT, 3 hours 4 minutes earlier.

Area forecast discussion, Jul 8, 2:55 PM EDT, 3 hours 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
255 PM EDT TUE JUL 8 2014

.SHORT TERM (TONIGHT AND WEDNESDAY)...FRONTAL SYSTEM STILL SAGGING
SOUTHWARD TOWARD THE AREA...AND DEEPER MOISTURE AND INSTABILITY
MOVING IN AS WELL.  LOOKING LIKE A FAIRLY WET NEXT COUPLE OF PERIODS
AS THE AXIS OF THIS SYSTEM MAKE ITS WAY INTO THE AREA. ALTHOUGH
MENTIONED "WET" ABOVE...FLOODING THREAT NOT LOOKING THAT GREAT AS
PROGRESSIVE INITIAL PARTS OF SYSTEM WILL SWEEP THROUGH...THEN AS
FRONT SAGS INTO AREA RICHER MOISTURE WILL BE SOUTH OR EAST OF THE
AREA.  SO A COUPLE OF CHANCES FOR PRECIP...THIS AFTERNOON AND THIS
EVENING WITH ADVANCING STRONG STORMS THAT MARCH ACROSS TO THE
EAST...THEN ALSO ANOTHER CHANCE TONIGHT AND WEDNESDAY AS THE MAIN
AXIS OF THE SYSTEM MOVE THROUGH THE AREA FROM THE NORTH/NORTHWEST.

DEEP CONVECTION STRUGGLING FINALLY GETTING STARTED.  MLCAPE VALUES
GETTING PRETTY HIGH...SO STILL THINK SEVERE THREAT EXISTS. ALSO
WONDERING ABOUT HOW STRONG ANY STORMS THAT DEVELOP CLOSER TO THE
FRONT MIGHT BE IF THEY MAKE THEIR WAY CLOSER TONIGHT...THINKING THE
STORMS THIS AFTERNOON ARE OUR BEST CHANCE FOR SEVERE OVERALL.

FOR TEMPERATURES KEEPING PRETTY CLOSE TO GUIDANCE FOR MINS TONIGHT
AND ON THE COOL SIDE OF MAXES FOR WEDNESDAY...CONSIDERING THE
LIMITED SUNSHINE...ESPECIALLY SOUTH.

.LONG TERM...(WEDNESDAY NIGHT THROUGH TUESDAY)...MODELS CONTINUE TO
BE IN FAIR AGREEMENT OVERALL WITH DECENT RUN TO RUN CONSISTENCY.
HOWEVER...GIVEN UNCERTAINTIES IN MODEL HANDLING OF POSSIBLE WEAK
IMPULSES IN THE NORTHWEST FLOW ALOFT FORECAST CONFIDENCE IS AT BEST
AVERAGE FOR THIS TIME OF YEAR. THE FRONT SHOULD FINALLY EXIT THE
AREA EARLY THURSDAY...BUT A WEAK IMPULSE STILL COULD HELP TO TRIGGER
SOME ISOLATED TO SCATTERED CONVECTION INTO THURSDAY AFTERNOON.
DRIER AIR SHOULD KEEP THINGS PRECIP FREE THURSDAY NIGHT THROUGH
FRIDAY NIGHT...THEN MOISTURE WILL BEGIN TO INCREASE AGAIN DURING THE
WEEKEND.  WILL CARRY SLIGHT CHANCE POPS SATURDAY AND CHANCE POPS
SUNDAY.  ANOTHER FRONTAL SYSTEM IS FORECAST TO AFFECT THE AREA EARLY
IN THE WEEK...SO CHANCE POPS BOTH MONDAY AND TUESDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
CHATTANOOGA AIRPORT, TN             71  86  68  89 /  60  60  30  30
KNOXVILLE MCGHEE TYSON AIRPORT, TN  71  83  66  87 /  60  50  20  20
OAK RIDGE, TN                       70  84  65  88 /  70  30  20  20
TRI CITIES AIRPORT, TN              68  82  61  85 /  60  30  20  20

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...NONE.
TN...NONE.
VA...NONE.
&&

GM/LW

Hazardous weather outlook, Jul 8, 11:34 AM EDT, 6 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
1134 AM EDT TUE JUL 8 2014

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-091545-
CHEROKEE-CLAY-SCOTT TN-CAMPBELL-CLAIBORNE-HANCOCK-HAWKINS-
SULLIVAN-JOHNSON-MORGAN-ANDERSON-UNION-GRAINGER-HAMBLEN-
NORTHWEST COCKE-COCKE SMOKY MOUNTAINS-NORTHWEST GREENE-
SOUTHEAST GREENE-WASHINGTON TN-UNICOI-NORTHWEST CARTER-
SOUTHEAST CARTER-ROANE-LOUDON-KNOX-JEFFERSON-NW BLOUNT-
BLOUNT SMOKY MOUNTAINS-NORTH SEVIER-SEVIER SMOKY MOUNTAINS-
SEQUATCHIE-BLEDSOE-RHEA-MEIGS-MCMINN-NORTHWEST MONROE-
SOUTHEAST MONROE-MARION-HAMILTON-BRADLEY-WEST POLK-EAST POLK-LEE-
WISE-SCOTT-RUSSELL-WASHINGTON-
1134 AM EDT TUE JUL 8 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH
CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

SCATTERED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE THIS
AFTERNOON AND EVENING...AHEAD OF A SLOW MOVING COLD FRONT. STORMS
ARE EXPECTED TO MOVE ACROSS THE AREA WEST TO EAST. DAMAGING WINDS
OF 60 MPH OR GREATER AND LARGE HAIL WILL BE THE MAIN THREATS WITH
THE STRONGEST STORMS.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

In the hours before

Local storm report, Jul 8, 5:25 PM EDT, 34 minutes before

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Local storm report, Jul 8, 5:36 PM EDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
536 PM EDT TUE JUL 08 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0515 PM     TSTM WND DMG     MOUNTAIN CITY           36.47N 81.81W
07/08/2014                   JOHNSON            TN   911 CALL CENTER

            A FEW TREES DOWN NEAR MOUNTAIN CITY.

&&

DH

Local storm report, Jul 8, 5:37 PM EDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
537 PM EDT TUE JUL 08 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0515 PM     HAIL             CLEVELAND               35.18N 84.87W
07/08/2014  E0.50 INCH       BRADLEY            TN   TRAINED SPOTTER

&&

DH

Local storm report, Jul 8, 5:43 PM EDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
543 PM EDT TUE JUL 08 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0520 PM     TSTM WND DMG     WEARS VALLEY            35.71N 83.66W
07/08/2014                   SEVIER             TN   911 CALL CENTER

            A FEW TREES DOWN NEAR WEARS VALLEY RD JUST SOUTH OF
            PIGEON FORGE TENNESSEE.

&&

DH

Local storm report, Jul 8, 5:44 PM EDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MORRISTOWN TN
544 PM EDT TUE JUL 08 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0320 PM     TSTM WND DMG     2 NW KNOXVILLE          36.00N 83.97W
07/08/2014                   KNOX               TN   911 CALL CENTER

            TREE DOWN IN HALLS.

0440 PM     TSTM WND DMG     1 E SEYMOUR             35.87N 83.76W
07/08/2014                   SEVIER             TN   911 CALL CENTER

            A FEW TREES DOWN JUST EAST OF SEYMOUR.

0440 PM     HAIL             SEYMOUR                 35.87N 83.77W
07/08/2014  E0.50 INCH       SEVIER             TN   911 CALL CENTER

            HIGH WINDS AND 1/2 INCH SIZE HAIL NEAR SEYMOUR -
            PORTERFILED GAP.

0444 PM     TSTM WND GST     TRI-CITY AIRPORT        36.48N 82.40W
07/08/2014  E48.00 MPH       SULLIVAN           TN   ASOS

            48 MPH WIND GUSTS AT THE TRI-CITY AIRPORT.

0453 PM     TSTM WND DMG     2 E GRAY                36.41N 82.44W
07/08/2014                   WASHINGTON         TN   911 CALL CENTER

            TREES DOWN NEAR THE BOONES CREEK AREA.

0453 PM     TSTM WND GST     CHATTANOOGA             35.07N 85.26W
07/08/2014  M50.00 MPH       HAMILTON           TN   ASOS

            50 MPH WIND GUSTS MEASURED AT THE CHATTANOOGA AIRPORT.

0458 PM     TSTM WND DMG     JOHNSON CITY            36.33N 82.37W
07/08/2014                   WASHINGTON         TN   TRAINED SPOTTER

            METAL ROOF BLOWN OFF BUILDING IN JOHNSON CITY TENNESSEE.

0458 PM     TSTM WND DMG     JOHNSON CITY            36.33N 82.37W
07/08/2014                   WASHINGTON         TN   TRAINED SPOTTER

            FEW TREES DOWN ACROSS JOHNSON CITY TENNESSEE.

0500 PM     TSTM WND DMG     BLOUNTVILLE             36.53N 82.33W
07/08/2014                   SULLIVAN           TN   911 CALL CENTER

            TREES DOWN COUNTY-WIDE.

0515 PM     HAIL             CLEVELAND               35.18N 84.87W
07/08/2014  E0.50 INCH       BRADLEY            TN   TRAINED SPOTTER

0515 PM     TSTM WND DMG     MOUNTAIN CITY           36.47N 81.81W
07/08/2014                   JOHNSON            TN   911 CALL CENTER

            A FEW TREES DOWN NEAR MOUNTAIN CITY.

0520 PM     TSTM WND DMG     CLEVELAND               35.18N 84.87W
07/08/2014                   BRADLEY            TN   TRAINED SPOTTER

            TREES DOWN NEAR HIGHWAY 64 AND 2 MILES WEST OF 411.

0520 PM     TSTM WND DMG     WEARS VALLEY            35.71N 83.66W
07/08/2014                   SEVIER             TN   911 CALL CENTER

            A FEW TREES DOWN NEAR WEARS VALLEY RD JUST SOUTH OF
            PIGEON FORGE TENNESSEE.

&&

DH

Local storm report, Jul 8, 5:59 PM EDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
559 PM EDT TUE JUL 08 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0505 PM     TSTM WND DMG     ELIZABETHTON            36.34N 82.23W
07/08/2014                   CARTER             TN   BROADCAST MEDIA

            REPORTS OF TREES DOWN AND POWER OUTAGES IN WATAUGA NEAR
            ELIZABETHTON TENNESSEE.

&&

DH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 2:34 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Knox	56 min
Jul 8, 4:02 PM EDT	Special Weather Statement	MRX	Cocke, Jefferson	58 min
Jul 8, 4:16 PM EDT	Special Weather Statement	MRX	Greene, Sullivan, Unicoi, Washington	59 min
Jul 8, 4:25 PM EDT	Special Weather Statement	MRX	Blount, Knox, Loudon	65 min
Jul 8, 4:30 PM EDT	Special Weather Statement	MRX	Bradley, Hamilton	60 min
Jul 8, 4:33 PM EDT	Severe Thunderstorm Warning	MRX	Sevier	57 min
Jul 8, 4:38 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Greene, Unicoi, Washington	67 min
Jul 8, 4:42 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Johnson, Sullivan	63 min
Jul 8, 4:48 PM EDT	Special Weather Statement	MRX	McMinn, Monroe	42 min
Jul 8, 4:58 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton, McMinn, Monroe, Polk	62 min
Jul 8, 5:11 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Sevier	49 min
Jul 8, 7:15 PM EDT	Special Weather Statement	MRX	Sequatchie	45 min
Jul 8, 5:30 PM EDT	Severe Thunderstorm Warning	MRX	Cherokee, Clay	60 min
Jul 8, 6:28 PM EDT	Severe Thunderstorm Warning	MRX	Cherokee, Clay	47 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.