Alert archive / Tennessee / Special Weather Statements in 2016

Special Weather Statement, NWS Morristown, TN

May 12, 2016Hamilton County, Sequatchie County, Tennessee

NWS Morristown, TN issued this special weather statement at May 12, 2016, 3:49 PM EDT for Hamilton County, Sequatchie County, Tennessee. It was in force for 41 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: May 12, 2016, 3:49 PM EDT (19:49 UTC)
Expired: May 12, 2016, 4:30 PM EDT
In force: 41 min
Issued by: NWS Morristown, TN

Counties Hamilton County, TN, Sequatchie County, TN

The radar

The Northeast Alabama radar (KHTX), 60 km from the middle of the area, began a volume at 19:49 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, 7.8 hours before the alert went out and 154 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: 134 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 832 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 53 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

The text

As transmitted.

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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 Morristown, TN wrote its last area forecast discussion before this special weather statement went out at May 12, 2:59 PM EDT, 50 minutes earlier.

Area forecast discussion, May 12, 2:59 PM EDT, 50 minutes before

Area Forecast Discussion
National Weather Service Morristown TN
259 PM EDT THU MAY 12 2016

.SHORT TERM...(Tonight and Friday)...Radar shows scattered
convection over our area...with the more concentrated line of
convection to our west ahead of the approaching cold front.  This
front...with its associated convection...will swing through the
area this evening and tonight. Still looks like some storms may be
strong to severe given the instability present...although low level
wind shear looks limited. Will keep mention in HWO.  For Friday
drier air will be moving in as surface high pressure builds in from
the west...and should see quite a bit of sunshine along with slightly
cooler temps.  MAV temps look reasonable for min temps
tonight...but look on the low side given expected sunshine for Friday
so will bump MAV max temps up a bit.

.LONG TERM...(Friday night through Thursday)...Very dry air mass in
place on Friday night behind a frontal passage earlier in the day.
This drier air mass will lead to overnight lows in the upper 40s to
near 50 north and low 50s elsewhere. Another weak front quickly races
down out of the northwest and moves through our area Saturday
morning into early afternoon, by late afternoon we should see
clearing skies. This front brings a pretty low chance of pops due to
lacking moisture and lift. Best chance of pops are low end chance
pops across northeast TN and southwest VA and only slight chance
pops across the central valley, with no pops southern valley.
Biggest impact this front will have will be increased cloud cover,
with again clearing skies mid to late afternoon. Though limited on
moisture, this front will bring a decent surge of cold air. Highs on
Saturday will only be a few degrees below normal but by Saturday
night highs will be a good 10 degrees below normal due to the cold
air advection. We remain in a dry post frontal air mass on Sunday,
so plenty of sun and cooler temperatures can be expected. Highs on
Sunday will be around 10 degrees below normal. Models continue to
show the front stalling out to our south Sunday night and gradually
making its way back north on Monday, as strong southerly 850 mb
commences. So will have precip chances increasing from southwest to
northeast through the day on Monday as the front lifts northward and
moisture builds into the area.

Monday night through Thursday continues to look very messy. We will
be well within the warm sector by Tuesday with good southerly flow
continuing across the Southeastern U.S. During this time, chance
pops will be in place due to our area being within a warm and moist
environment. Timing of best chance of pops is still hard to pin down
because there aren't any very organized features moving through the
flow during this time-frame. However...the best chance of pops during
this period looks to be on Wednesday as an upper level jet slides
into our area from out of the southwest. This 300 mb jet will lead
to increase lift across the area and allow for high-end chance to
likely pops across the area on Wednesday. Tuesday through Thursday
there will also be a chance for a few afternoon thunderstorms...due
to our area residing in a warm and moist environment. Temperatures
during this time will be a little above normal for highs and lows.

&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             60  79  54  77 /  70  10   0  10
Knoxville McGhee Tyson Airport, TN  59  75  53  74 /  80  10  10  20
Oak Ridge, TN                       59  76  52  73 /  80  10  10  20
Tri Cities Airport, TN              59  74  48  71 /  80  10  10  30

&&

.MRX Watches/Warnings/Advisories...
NC...None.
TN...None.
VA...None.
&&

LW/SR

Hazardous weather outlook, May 12, 3:13 PM EDT, 36 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
313 PM EDT THU MAY 12 2016

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-131915-
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-
313 PM EDT THU MAY 12 2016 /213 PM CDT THU MAY 12 2016/

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

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

SHOWERS AND THUNDERSTORMS CAN BE EXPECTED INTO THE FIRST PART OF
TONIGHT PRODUCING HEAVY DOWNPOURS...FREQUENT LIGHTNING AND GUSTY
WIND. SOME OF THESE STORMS MAY BECOME STRONG TO SEVERE AND MAY
PRODUCE DAMAGING WIND AND LARGE HAIL.

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

THE NEXT CHANCE FOR ORGANIZED STORMS LOOKS TO BE ABOUT THE MIDDLE
OF NEXT WEEK AHEAD OF THE NEXT COLD FRONT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND EVENING.

In the hours before

Special weather statement, May 12, 2:46 PM EDT, 1 hour 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
246 PM EDT THU MAY 12 2016

TNZ099-121930-
HAMILTON-
246 PM EDT THU MAY 12 2016

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN HAMILTON COUNTY...

AT 246 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR RIDGESIDE...OR
NEAR CHATTANOOGA...MOVING NORTH AT 15 MPH.

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

LOCATIONS IMPACTED INCLUDE...
CHATTANOOGA...SODDY-DAISY...SIGNAL MOUNTAIN...WALDEN...LAKESITE...
RIDGESIDE...HARRISON...FAIRMOUNT...RED BANK...COLLEGEDALE...EAST BRAINERD...
OOLTEWAH AND MIDDLE VALLEY.

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

CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 3504 8541 3504 8539 3507 8536 3509 8536
      3511 8540 3516 8538 3526 8530 3518 8501
      3516 8501 3515 8502 3513 8503 3512 8502
      3502 8505 3499 8508 3498 8544
TIME...MOT...LOC 1846Z 199DEG 12KT 3500 8533

AMP.23

Special weather statement, May 12, 2:51 PM EDT, 58 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
251 PM EDT THU MAY 12 2016

TNZ013-014-037-121930-
CAMPBELL-CLAIBORNE-UNION-
251 PM EDT THU MAY 12 2016

...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL CAMPBELL...CENTRAL
CLAIBORNE AND NORTHERN UNION COUNTIES...

AT 251 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 13 MILES EAST OF LA
FOLLETTE...MOVING EAST AT 20 MPH.

WIND GUSTS UP TO 50 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
NEW TAZEWELL...TAZEWELL...HARROGATE-SHAWANEE...LONE MOUNTAIN...
SPRINGDALE...SANDLICK AND ARTHUR.

CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 3660 8360 3636 8357 3637 8359 3636 8360
      3634 8364 3634 8367 3635 8375 3636 8399
      3651 8399
TIME...MOT...LOC 1851Z 265DEG 17KT 3645 8390

AMP.23

Special weather statement, May 12, 2:56 PM EDT, 53 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
256 PM EDT THU MAY 12 2016

TNZ036-037-069-121945-
KNOX-ANDERSON-UNION-
256 PM EDT THU MAY 12 2016

...A STRONG THUNDERSTORM WILL AFFECT KNOX...SOUTHERN ANDERSON AND
SOUTH CENTRAL UNION COUNTIES...

AT 256 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR OAK RIDGE...
MOVING EAST AT 35 MPH.

WIND GUSTS UP TO 50 MPH AND DIME SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
KNOXVILLE...OAK RIDGE...CLINTON...FARRAGUT...OLIVER SPRINGS...PLAINVIEW...
HALLS...PAULETTE...KARNS...BEARDEN...MALONEYVILLE...POWELL AND MASCOT.

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

LAT...LON 3599 8432 3607 8435 3623 8381 3595 8374
      3589 8426
TIME...MOT...LOC 1856Z 255DEG 29KT 3600 8424

AMP.23

Special weather statement, May 12, 2:58 PM EDT, 51 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
258 PM EDT THU MAY 12 2016

TNZ073-074-121945-
SEVIER SMOKY MOUNTAINS-NORTH SEVIER-
258 PM EDT THU MAY 12 2016

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL SEVIER COUNTY...

AT 257 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR GATLINBURG...
MOVING NORTHEAST AT 15 MPH.

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

LOCATIONS IMPACTED INCLUDE...
SEVIERVILLE...GATLINBURG...PIGEON FORGE...PITTMAN CENTER...BIRD CROSSING
AND HARRISBURG.

CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 3569 8366 3598 8355 3596 8352 3594 8350
      3594 8349 3593 8349 3592 8346 3593 8340
      3591 8339 3592 8335 3590 8331 3587 8331
      3587 8329 3584 8328 3562 8346
TIME...MOT...LOC 1857Z 206DEG 15KT 3572 8355

AMP.23

Special weather statement, May 12, 3:09 PM EDT, 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
309 PM EDT THU MAY 12 2016

NCZ060-TNZ087-102-121945-
CHEROKEE-SOUTHEAST MONROE-EAST POLK-
309 PM EDT THU MAY 12 2016

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN CHEROKEE AND
SOUTHEASTERN MONROE COUNTIES...

AT 308 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 12 MILES NORTHEAST
OF DUCKTOWN...MOVING NORTHEAST AT 15 MPH.

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

LOCATIONS IMPACTED INCLUDE...
COKER CREEK...UNAKA...HIAWASSE DAM AND VIOLET.

CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 3512 8434 3531 8429 3539 8420 3532 8403
      3531 8404 3530 8402 3529 8403 3527 8401
      3526 8401 3525 8400 3524 8401 3523 8399
      3506 8418
TIME...MOT...LOC 1908Z 206DEG 14KT 3517 8424

AMP.23

Special weather statement, May 12, 3:49 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
349 PM EDT THU MAY 12 2016

TNZ081-098-099-122030-
MARION TN-HAMILTON TN-SEQUATCHIE TN-
349 PM EDT THU MAY 12 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN SEQUATCHIE...CENTRAL
HAMILTON AND EASTERN MARION COUNTIES UNTIL 430 PM EDT/330 PM CDT/...

AT 349 PM EDT/249 PM CDT/...DOPPLER RADAR WAS TRACKING A STRONG
THUNDERSTORM NEAR JASPER...MOVING NORTHEAST AT 30 MPH.

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

LOCATIONS IMPACTED INCLUDE...
DUNLAP...JASPER...SODDY-DAISY...SIGNAL MOUNTAIN...WALDEN...LAKESITE...
WHITWELL...KIMBALL...FAIRMOUNT...RED BANK...POWELLS CROSSROADS...MARTIN
SPRINGS...HALETOWN (GUILD)...CARTWRIGHT...MIDDLE VALLEY AND LONE OAK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3498 8559 3505 8568 3542 8539 3522 8508
      3498 8543
TIME...MOT...LOC 1949Z 221DEG 25KT 3509 8552

SR

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 12:38 AM EDT	Special Weather Statement	MRX	Campbell	37 min
May 12, 12:58 PM EDT	Special Weather Statement	MRX	Morgan	47 min
May 12, 1:16 PM EDT	Special Weather Statement	MRX	Roane	29 min
May 12, 1:33 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Scott	27 min
May 12, 1:36 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Morgan	24 min
May 12, 1:41 PM EDT	Special Weather Statement	MRX	Roane	49 min
May 12, 2:02 PM EDT	Special Weather Statement	MRX	Anderson, Campbell, Union	43 min
May 12, 2:22 PM EDT	Special Weather Statement	MRX	Cocke	38 min
May 12, 2:46 PM EDT	Special Weather Statement	MRX	Hamilton	44 min
May 12, 2:51 PM EDT	Special Weather Statement	MRX	Claiborne	39 min
May 12, 2:56 PM EDT	Special Weather Statement	MRX	Knox	49 min
May 12, 2:58 PM EDT	Special Weather Statement	MRX	Sevier	47 min
May 12, 3:26 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Jefferson, Sevier	34 min
May 12, 3:29 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Jefferson, Knox, Sevier	46 min
May 12, 3:59 PM EDT	Special Weather Statement	MRX	Hamblen	46 min
May 12, 4:05 PM EDT	Special Weather Statement	MRX	Blount, Monroe	25 min
May 12, 4:08 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Grainger, Hamblen, Jefferson, Sevier	37 min
May 12, 4:44 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Hamblen, Hawkins	46 min
May 12, 4:45 PM EDT	Special Weather Statement	MRX	Blount, Loudon	30 min
May 12, 5:15 PM EDT	Special Weather Statement	MRX	Campbell, Morgan	45 min
May 12, 5:19 PM EDT	Severe Thunderstorm Warning	MRX	Hawkins, Sullivan	41 min
May 12, 5:25 PM EDT	Special Weather Statement	MRX	Anderson, Jefferson, Knox, Sevier	50 min
May 12, 5:50 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan	40 min
May 12, 5:55 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan	35 min
May 12, 4:50 PM EDT	Special Weather Statement	MRX	City of Norton	40 min
May 12, 6:25 PM EDT	Severe Thunderstorm Warning	MRX	Russell, Washington, City of Bristol	27 min
May 12, 12:45 PM EDT	Severe Thunderstorm Warning	MRX	Cherokee	19 min
May 12, 3:09 PM EDT	Special Weather Statement	MRX	Cherokee	36 min
May 12, 4:29 PM EDT	Special Weather Statement	MRX	Cherokee	46 min

Nearby

Special Weather Statements in Tennessee, 2016 Every special weather statement in 2016

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.