Alert archive / Tennessee / Special Weather Statements in 2015

Special Weather Statement, NWS Morristown, TN

July 8, 20154 counties in Tennessee

NWS Morristown, TN issued this special weather statement at Jul 8, 2015, 12:18 AM EDT for 4 counties in Tennessee. It was in force for 57 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 8, 2015, 12:18 AM EDT (04:18 UTC)
Expired
Jul 8, 2015, 1:15 AM EDT
In force
57 min
Issued by
NWS Morristown, TN

Counties Grainger County, TN, Hamblen County, TN, Jefferson County, TN, Knox County, TN

The radar

The Knoxville radar (KMRX), 4 km from the middle of the area, began a volume at 04:20 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, 4.3 hours before the alert went out and 290 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-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2015-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 304 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2015-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
304 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
983 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
129 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

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 Morristown, TN wrote its last area forecast discussion before this special weather statement went out at Jul 7, 9:28 PM EDT, 2 hours 50 minutes earlier.

Area forecast discussion, Jul 7, 9:28 PM EDT, 2 hours 50 minutes before
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE MORRISTOWN TN
928 PM EDT TUE JUL 7 2015

.DISCUSSION...
A GRADUAL DECAYING LINE OF STORMS CONTINUES TO TRACK INTO THE
NORTHERN PLATEAU AND THE CUMBERLAND MTNS OF EASTERN KENTUCKY AND
SOUTHWEST VIRGINIA ALONG THE EDGE OF AN UPPER-LEVEL RIDGE OF HIGH
PRESSURE THAT IS BUILDING INTO THE AREA. THOUGH WEAKER...THIS
ACTIVITY WILL STILL BE CAPABLE OF PRODUCING SOME GUSTY WINDS AND
LIGHTNING...ALONG WITH SOME HEAVY DOWNPOURS. FOR LATER TONIGHT..
.MODELS CONTINUE TO SHOW SCATTERED SHOWERS AND STORMS TRACKING
THROUGH THIS SAME GENERAL AREA...PARTICULARLY AFTER MIDNIGHT. AS
SUCH...HAVE ADJUSTED POP GRIDS ACCORDINGLY. FOR NOW...HAVE KEPT
AREAS SOUTH AND EAST OF I-40 AND I-75 BELOW MENTIONABLE POP
LEVELS...AS THINK THE GENERAL STORM MOTION WILL MOSTLY KEEP THIS
ACTIVITY NORTH AND WEST OF THERE. THE ENHANCED CLOUD COVER
HOWEVER...SHOULD HELP TO KEEP TEMPERATURES UP BY A COUPLE DEGREES.
IN ADDITION...DUE TO THE BOUNDARY LAYER MOISTURE...AREAS THAT HAVE
A FEW BREAKS IN THE CLOUDS COULD SEE SOME PATCHY FOG LATE TONIGHT.

&&

.PRELIMINARY POINT TEMPS/POPS...
CHATTANOOGA AIRPORT, TN             73  92  72  92 /  10  30  10  10
KNOXVILLE MCGHEE TYSON AIRPORT, TN  72  88  70  89 /  20  30  20  10
OAK RIDGE, TN                       71  88  70  89 /  40  30  20  10
TRI CITIES AIRPORT, TN              68  84  65  87 /  30  40  20  20

&&

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

AMP
Hazardous weather outlook, Jul 7, 9:43 PM EDT, 2 hours 35 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MORRISTOWN TN
943 PM EDT TUE JUL 7 2015

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-090145-
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-
943 PM EDT TUE JUL 7 2015 /843 PM CDT TUE JUL 7 2015/

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

.DAY ONE...TONIGHT...

A FEW STRONG THUNDERSTORMS WILL BE POSSIBLE TONIGHT...MAINLY FOR
AREAS ALONG AND NORTH OF THE INTERSTATE 40 CORRIDOR. GUSTY WINDS
OF 40 TO 50 MPH...LIGHTNING...AND HEAVY DOWNPOURS WILL BE THE
BIGGEST THREATS WITH THE STRONGEST ACTIVITY.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

In the hours before

Special weather statement, Jul 7, 9:54 PM EDT, 2 hours 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
954 PM EDT TUE JUL 7 2015

TNZ012-035-080300-
SCOTT-MORGAN-
954 PM EDT TUE JUL 7 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SCOTT AND MORGAN
COUNTIES...

AT 953 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM 14 MILES WEST OF ONEIDA TO 27 MILES WEST OF
WARTBURG...AND MOVING NORTHEAST AT 35 MPH.

WINDS IN EXCESS OF 40 MPH AND DIME SIZE HAIL ARE POSSIBLE WITH THESE
STORMS.

LOCATIONS IMPACTED INCLUDE...
ONEIDA...WARTBURG...OLIVER SPRINGS...HUNTSVILLE...HELENWOOD...
HARRIMAN...WINFIELD...SUNBRIGHT...OAKDALE...ELGIN...PINE ORCHARD...
BIG SOUTH FORK NATIONAL...HIGH POINT...SMOKEY JUNCTION...PETROS...
SLICK ROCK...RUGBY...DEERLODGE...KETCHEN AND NORMA.

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 3659 8426 3651 8426 3651 8433 3646 8435
      3639 8431 3638 8431 3639 8433 3628 8433
      3615 8445 3604 8436 3599 8444 3591 8468
      3609 8480 3616 8491 3620 8491 3629 8487
      3630 8480 3637 8472 3640 8466 3660 8478
TIME...MOT...LOC 0153Z 234DEG 33KT 3653 8478 3617 8508

MJB
Special weather statement, Jul 7, 11:19 PM EDT, 59 minutes before
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Special weather statement, Jul 7, 11:37 PM EDT, 41 minutes before
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Special weather statement, Jul 7, 11:43 PM EDT, 35 minutes before
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Special weather statement, Jul 7, 11:48 PM EDT, 30 minutes before
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Special weather statement, Jul 8, 12:18 AM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 9:21 PM EDTSpecial Weather StatementMRXScott39 min
Jul 7, 9:54 PM EDTSpecial Weather StatementMRXMorgan, Scott66 min
Jul 7, 10:12 PM EDTSevere Thunderstorm WarningMRXMorgan, Scott48 min
Jul 7, 10:37 PM EDTSevere Thunderstorm WarningMRXAnderson, Campbell, Scott53 min
Jul 7, 10:40 PM EDTSevere Thunderstorm WarningMRXAnderson, Morgan, Roane65 min
Jul 7, 10:57 PM EDTSevere Thunderstorm WarningMRXMorgan, Scott63 min
Jul 7, 11:14 PM EDTSevere Thunderstorm WarningMRXClaiborne, Union61 min
Jul 7, 11:19 PM EDTSpecial Weather StatementMRXRoane41 min
Jul 7, 11:37 PM EDTSpecial Weather StatementMRXAnderson38 min
Jul 7, 11:43 PM EDTSpecial Weather StatementMRXClaiborne, Grainger47 min
Jul 7, 11:48 PM EDTSpecial Weather StatementMRXAnderson, Knox27 min
Jul 8, 12:20 AM EDTSpecial Weather StatementMRXBlount55 min
Jul 8, 1:57 AM EDTSpecial Weather StatementMRXAnderson, Campbell, Claiborne, Morgan, Roane, Union33 min
Jul 8, 3:01 AM EDTSpecial Weather StatementMRXGrainger, Hamblen, Jefferson, Knox, Sevier44 min
Jul 8, 3:03 AM EDTSpecial Weather StatementMRXHancock, Hawkins42 min
Jul 7, 8:53 PM EDTSpecial Weather StatementMRXLee, Scott37 min

Nearby

Special Weather Statements in Tennessee, 2015Every special weather statement 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.