Alert archive / Tennessee / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 161, NWS Morristown, TN

August 5, 20154 counties in Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Aug 5, 2015, 5:39 PM EDT for 4 counties in Tennessee. It was in force for 51 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: Aug 5, 2015, 5:39 PM EDT (21:39 UTC)
Expired: Aug 5, 2015, 6:30 PM EDT
In force: 51 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Carter County, TN, Sullivan County, TN, Unicoi County, TN, Washington County, TN

The radar

The Knoxville radar (KMRX), 96 km from the middle of the area, began a volume at 21:42 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.7 hours before the alert went out and 220 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: 186 J/kg
Mixed-layer CIN: -203 J/kg
Mixed-layer LCL: 1664 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 67 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 Aug 5, 2:38 PM EDT, 3 hours 1 minute earlier.

Area forecast discussion, Aug 5, 2:38 PM EDT, 3 hours 1 minute before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
238 PM EDT WED AUG 5 2015

.SHORT TERM...(TONIGHT AND THURSDAY)...UPPER LEVEL TROUGH WILL MOVE
IN DURING THE PERIOD...WITH A WEAK SURFACE WAVE MOVING ALONG THE
NEARLY STATIONARY AND WEAK FRONTAL BOUNDARY IN THE VICINITY OF THE
NORTHERN TN BORDER. WITH PLENTY OF AVAILABLE MOISTURE...WILL SEE
INCREASING COVERAGE OF SHOWERS AND THUNDERSTORMS DURING THE SHORT
TERM PERIOD. MAIN CONCERN WITH THIS ACTIVITY WILL BE POSSIBILITY OF
LOCALIZED FLOODING ALTHOUGH AN ISOLATED STRONG TO SEVERE STORM
CANNOT BE RULED OUT. WILL MENTION THIS IN THE HWO. WILL NOT STRAY
FAR FROM MAV TEMPS...BUT WILL UNDERCUT SLIGHTLY FOR HIGHS THURSDAY
GIVEN EXPECTED CLOUD COVER AND PRECIP.

.LONG TERM...(THURSDAY NIGHT THROUGH WEDNESDAY)...MODELS HAVE HEAVY
WIDESPREAD RAIN CONTINUING THROUGH THE FIRST HALF OF THURSDAY NIGHT.
DRIER MID AND UPPER LEVEL AIR WILL MAKES ITS WAY IN TO THE AREA
EARLY FRIDAY MORNING...LIMITING SHOWERS AND THUNDERSTORMS. BY MID
MORNING FRIDAY...FORCING AND MOISURE SHOULD BE OUT OF THE
AREA...LEAVING MOSTLY DRY CONDITIONS THROUGH THE DAY. HIGHER
ELEVATIONS COULD STILL SEE SOME ISOLATED SHOWERS AND THUNDERSTORMS
THROUGH THE EARLY AFTERNOON WITH FLOW FROM THE NORTHWEST. BY FRIDAY
EVENING...HIGH PRESSURE WILL BE OVER THE AREA...KEEPING ANY RAIN
CHANCES EAST OF THE APPALACHIANS THROUGH THE WEEKEND. MOSTLY CLEAR
SKIES AND SLOWLY RISING TEMPERATURES WILL BE PRESENT THROUGH THE
WEEKEND.

MONDAY AFTERNOON...A WEAK FRONT TRIES TO MOVE THROUGH THE AREA. WEAK
FORCING BEHIND THIS FRONT WILL CAUSE SHOWERS AND THUNDERSTORMS TO
DEVELOP AND SLOWLY MOVE THROUGH THE AREA THROUGH TUESDAY NIGHT. THE
FRONT LOOKS TO MOVE OUT EARLY WEDNESDAY MORNING...WITH DRY WEATHER
FOR WEDNESDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
CHATTANOOGA AIRPORT, TN             72  86  71  88 /  60  80  60  20
KNOXVILLE MCGHEE TYSON AIRPORT, TN  69  84  68  86 /  50  80  60  20
OAK RIDGE, TN                       71  82  68  86 /  60  90  60  20
TRI CITIES AIRPORT, TN              68  82  66  82 /  50  80  80  20

&&

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

LW/JW

Hazardous weather outlook, Aug 5, 2:52 PM EDT, 2 hours 47 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
252 PM EDT WED AUG 5 2015

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-061900-
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-
252 PM EDT WED AUG 5 2015 /152 PM CDT WED AUG 5 2015/

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

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

SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS CAN BE EXPECTED
THROUGH TONIGHT. VERY HEAVY RAINFALL WILL BE POSSIBLE WHICH MAY
LEAD TO LOCALIZED FLOODING...AND A FEW STORMS MAY PRODUCE STRONG
WIND GUSTS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

SHOWERS AND THUNDERSTORMS MAY PRODUCE VERY HEAVY RAINFALL ON
THURSDAY WITH LOCALIZED FLOODING POSSIBLE. SOME OF THE STRONGER
STORMS COULD ALSO PRODUCE STRONG GUSTY WINDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY NOT BE NEEDED.

In the hours before

Special weather statement, Aug 5, 4:13 PM EDT, 1 hour 26 minutes before

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Special weather statement, Aug 5, 4:18 PM EDT, 1 hour 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
418 PM EDT WED AUG 5 2015

TNZ083-084-099-052100-
RHEA TN-MEIGS TN-HAMILTON TN-
418 PM EDT WED AUG 5 2015

SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN RHEA...SOUTHERN MEIGS...
AND NORTHERN HAMILTON COUNTIES UNTIL 500 PM EDT...

AT 416 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
SODDY-DAISY...OR 12 MILES SOUTHEAST OF DUNLAP...MOVING NORTHEAST AT
15 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
DAYTON...SODDY-DAISY...LAKESITE...GRAYSVILLE...SHADY GROVE...SALE
CREEK...BIRCHWOOD...BIG SPRING AND MIDDLE VALLEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3512 8505 3527 8529 3532 8524 3545 8517
      3545 8515 3547 8512 3549 8514 3553 8512
      3553 8510 3536 8485 3535 8486 3536 8488
      3533 8489 3530 8494 3519 8501 3517 8501
TIME...MOT...LOC 2016Z 235DEG 15KT 3528 8520

TG

Special weather statement, Aug 5, 4:43 PM EDT, 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
443 PM EDT WED AUG 5 2015

TNZ016-038-039-042-052130-
HAWKINS TN-HAMBLEN TN-GRAINGER TN-NORTHWEST GREENE TN-
443 PM EDT WED AUG 5 2015

SIGNIFICANT WEATHER ADVISORY FOR HAWKINS...HAMBLEN...GRAINGER...AND
NORTHWEST GREENE COUNTIES UNTIL 530 PM EDT...

AT 443 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
RUSSELLVILLE...OR 8 MILES NORTHEAST OF MORRISTOWN...MOVING NORTHEAST
AT 35 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
MORRISTOWN...ROGERSVILLE...BEAN STATION...WHITE PINE...
RUSSELLVILLE...MOSHEIM...BULLS GAP...BAILEYTON...LOWLAND...MCCLOUD...
KEPLER...ROMEO...ST. CLAIR...KLONDIKE...JEAROLDSTOWN...MOORESBURG AND
MOHAWK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3656 8301 3626 8267 3613 8314 3616 8317
      3618 8317 3617 8319 3613 8318 3613 8319
      3615 8322 3613 8322 3613 8324 3610 8324
      3614 8330 3625 8340
TIME...MOT...LOC 2043Z 238DEG 31KT 3626 8316

MOULTON

Special weather statement, Aug 5, 5:07 PM EDT, 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
507 PM EDT WED AUG 5 2015

TNZ045-052130-
UNICOI TN-
507 PM EDT WED AUG 5 2015

SIGNIFICANT WEATHER ADVISORY FOR UNICOI COUNTY UNTIL 530 PM EDT...

AT 507 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
BANNER HILL...OR 7 MILES SOUTH OF ERWIN...MOVING NORTHEAST AT 10 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
ERWIN...BANNER HILL AND UNICOI.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3612 8233 3612 8235 3609 8240 3601 8246
      3598 8250 3608 8258 3616 8244 3616 8243
      3617 8241 3617 8242 3621 8235 3613 8230
TIME...MOT...LOC 2107Z 237DEG 7KT 3605 8245

MOULTON

Special weather statement, Aug 5, 5:15 PM EDT, 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
515 PM EDT WED AUG 5 2015

TNZ044-045-052200-
UNICOI TN-WASHINGTON TN-
515 PM EDT WED AUG 5 2015

SIGNIFICANT WEATHER ADVISORY FOR UNICOI...AND WASHINGTON COUNTIES
UNTIL 600 PM EDT...

AT 515 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 9
MILES SOUTHWEST OF JONESBOROUGH...OR 10 MILES WEST OF ERWIN...MOVING
NORTHEAST AT 15 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
JOHNSON CITY...JONESBOROUGH...MIDWAY...UNICOI...LIBERTY...LEESBURG...
EMBREEVILLE...LIMESTONE AND AVONDALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3608 8258 3614 8263 3614 8264 3615 8265
      3621 8265 3621 8264 3625 8264 3638 8248
      3620 8232
TIME...MOT...LOC 2115Z 233DEG 14KT 3620 8259

MOULTON

Special weather statement, Aug 5, 5:29 PM EDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
529 PM EDT WED AUG 5 2015

TNZ015-016-VAZ001-005-052200-
HAWKINS TN-HANCOCK TN-SCOTT VA-LEE VA-
529 PM EDT WED AUG 5 2015

SIGNIFICANT WEATHER ADVISORY FOR HAWKINS...HANCOCK...SCOTT...AND LEE
COUNTIES UNTIL 600 PM EDT...

AT 529 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 10
MILES NORTHWEST OF SURGOINSVILLE...OR 10 MILES SOUTHEAST OF
JONESVILLE...MOVING EAST AT 35 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
JONESVILLE...PENNINGTON GAP...DUFFIELD...CLINCHPORT...OKOLONA...
DRYDEN...KYLES FORD AND PATTONSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3660 8262 3645 8302 3660 8322 3686 8299
      3686 8297
TIME...MOT...LOC 2129Z 252DEG 29KT 3658 8298

MOULTON

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 2:05 PM EDT	Special Weather Statement	MRX	Bledsoe	25 min
Aug 5, 2:38 PM EDT	Special Weather Statement	MRX	Knox	37 min
Aug 5, 2:50 PM EDT	Areal Flood Advisory	MRX	Bledsoe	3 hr
Aug 5, 3:05 PM EDT	Special Weather Statement	MRX	Sevier	25 min
Aug 5, 3:19 PM EDT	Special Weather Statement	MRX	Scott	26 min
Aug 5, 3:26 PM EDT	Special Weather Statement	MRX	Cocke	34 min
Aug 5, 3:41 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Scott	21 min
Aug 5, 3:57 PM EDT	Special Weather Statement	MRX	Grainger	48 min
Aug 5, 4:01 PM EDT	Special Weather Statement	MRX	Greene	44 min
Aug 5, 4:13 PM EDT	Special Weather Statement	MRX	Hamblen	32 min
Aug 5, 4:18 PM EDT	Special Weather Statement	MRX	Hamilton	42 min
Aug 5, 4:43 PM EDT	Special Weather Statement	MRX	Hamblen, Hawkins	47 min
Aug 5, 5:07 PM EDT	Special Weather Statement	MRX	Unicoi	23 min
Aug 5, 5:15 PM EDT	Special Weather Statement	MRX	Washington	45 min
Aug 5, 5:48 PM EDT	Special Weather Statement	MRX	Sullivan	27 min
Aug 5, 6:06 PM EDT	Areal Flood Advisory	MRX	Carter, Unicoi, Washington	3 hr
Aug 5, 6:23 PM EDT	Special Weather Statement	MRX	Sullivan	37 min
Aug 5, 6:29 PM EDT	Special Weather Statement	MRX	Carter, Johnson	46 min
Aug 5, 7:42 PM EDT	Special Weather Statement	MRX	Hamilton, Marion, Sequatchie	33 min
Aug 5, 5:29 PM EDT	Special Weather Statement	MRX	Lee	31 min
Aug 5, 6:15 PM EDT	Special Weather Statement	MRX	Wise, City of Norton	45 min
Aug 5, 7:06 PM EDT	Special Weather Statement	MRX	Russell	39 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2015 Every severe thunderstorm warning in 2015

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.