Alert archive / Tennessee / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 182, NWS Morristown, TN

July 7, 2008Claiborne County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 7, 2008, 6:06 PM EDT for Claiborne County, Tennessee. It was in force for 39 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 7, 2008, 6:06 PM EDT (22:06 UTC)
Expired: Jul 7, 2008, 6:45 PM EDT
In force: 39 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

County Claiborne County, TN

What was reported inside it

Time	Report	Where	Remark
Jul 7, 6:20 PM EDT	TSTM WND DMG	Tazewell, TN	SEVERAL TREES DOWN IN AND AROUND TAZEWELL. REPORTED BY DISPATCH

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 14 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.1 hours before the alert went out and 269 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: 991 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 966 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KMRX 072206
SVRMRX
TNC025-072300-
/O.NEW.KMRX.SV.W.0182.080707T2206Z-080707T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
606 PM EDT MON JUL 7 2008

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLAIBORNE COUNTY IN EAST TENNESSEE...

* UNTIL 700 PM EDT

* AT 604 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
  SOUTHWEST OF HARROGATE-SHAWANEE...MOVING SOUTHEAST AROUND 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TAZEWELL BY 625 PM EDT...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES PRIMARY KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

LAT...LON 3660 8368 3661 8366 3652 8338 3641 8341
      3636 8356 3636 8359 3634 8362 3648 8387
      3659 8377 3659 8370 3661 8369
TIME...MOT...LOC 2206Z 307DEG 19KT 3650 8371

$$

DMG

2 follow-up statements

000 
WWUS54 KMRX 072227
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
627 PM EDT MON JUL 7 2008

TNC025-072300-
/O.CON.KMRX.SV.W.0182.000000T0000Z-080707T2300Z/
CLAIBORNE TN-
627 PM EDT MON JUL 7 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR CLAIBORNE COUNTY...

AT 625 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED NEAR TAZEWELL...MOVING SOUTHEAST AROUND 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  7 MILES SOUTHWEST OF HOWARD QUARTER BY 640 PM EDT...

LAT...LON 3652 8338 3641 8341 3636 8356 3637 8357
      3636 8359 3634 8362 3644 8377 3651 8366
      3653 8358 3657 8355
TIME...MOT...LOC 2227Z 309DEG 20KT 3644 8357

$$

DMG

000 
WWUS54 KMRX 072245
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
645 PM EDT MON JUL 7 2008

TNC025-072255-
/O.CAN.KMRX.SV.W.0182.000000T0000Z-080707T2300Z/
CLAIBORNE TN-
645 PM EDT MON JUL 7 2008

...THE SEVERE THUNDERSTORM WARNING FOR CLAIBORNE COUNTY IS
CANCELLED...

THE STORMS THAT PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LEVELS. THEREFORE...THE WARNING HAS BEEN CANCELLED.

LAT...LON 3652 8338 3641 8341 3636 8356 3637 8357
      3636 8359 3634 8362 3644 8377 3651 8366
      3653 8358 3657 8355
TIME...MOT...LOC 2243Z 309DEG 20KT 3638 8348

$$

DMG

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 7, 2:37 PM EDT, 3 hours 29 minutes earlier.

Area forecast discussion, Jul 7, 2:37 PM EDT, 3 hours 29 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
237 PM EDT MON JUL 7 2008

.SHORT TERM...(TONIGHT AND TUESDAY)...MODELS AND SREF NOW SHOW OHIO
VALLEY MCS REMAINING RELATIVELY INTACT THROUGH THIS AFTERNOON AND
POSSIBLY EFFECTING AT LEAST THE NORTHERN HALF OF THE FORECAST AREA
DURING THE FIRST PERIOD. AS SUCH...WILL GO WITH HIGH CHANCE POPS
ALONG THE NORTHERN TIER DECREASING TO SLIGHT CHANCE IN THE SOUTHERN
TIER. BOUNDARIES LEFT OVER FROM CONVECTIVE COMPLEX WILL LIKELY
PROVIDE FOCUS FOR SOME REDEVELOPMENT TOMORROW AFTERNOON. THUS
APPEARS HIGH CHANCE POPS PROJECTED BY MODEL GUIDANCE IS WARRANTED.
FOR TEMPS...FOLLOWED MAV GUIDANCE CLOSELY WITH THE EXCEPTION OF A
FEW TWEAKS TO BUMP UP MAX TEMPS IN SOME SPOTS.

.LONG TERM...(TUESDAY NIGHT THROUGH MONDAY)...
A SURFACE FRONT AND A MIDLEVEL SHORTWAVE TROUGH WILL MOVE OVER THE
OHIO VALLEY ON WEDNESDAY. 850 MB THETA-E RIDGE WILL BE OVER THE AREA
WEDNESDAY AFTERNOON...AND UPPER DIVERGENCE WILL ALSO BE INCREASING
AS THE 300 MB JET PUSHES EAST. WILL HAVE HIGH CHANCE POPS FOR
WEDNESDAY. THE GFS IS AGGRESSIVE IN PUSHING THE FRONT THROUGH THE
AREA AND BRINGING A DRIER AIR MASS INTO THE AREA FOR
THURSDAY...HOWEVER THIS IS LIKELY OVERDONE GIVEN THE STRENGTH OF THE
ATLANTIC RIDGE...AND THE NAM KEEPS THE FRONT WELL TO OUR NORTH...SO
WILL KEEP CHANCE POPS IN FOR THURSDAY.

THE REST OF THE FORECAST LOOKS LIKE A TYPICAL SUMMER TIME
PATTERN...WITH THE ATLANTIC RIDGE EXTENDING EAST ACROSS THE GULF
COAST...AND A ZONAL FLOW ALOFT. SMALL SHORTWAVES MAY PASS THROUGH
EACH DAY...BUT THESE FEATURES ARE TOO SMALL TO RESOLVE THIS FAR OUT.
WILL FOLLOW CLIMATOLOGY AND PERSISTENCE...AND HAVE DIRUNAL POPS EACH
DAY THROUGH TUESDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
CHATTANOOGA AIRPORT, TN             68  92  71  91  71 /  20  20  20  40  40
KNOXVILLE MCGHEE TYSON AIRPORT, TN  68  88  71  87  71 /  30  40  30  40  40
OAK RIDGE, TN                       68  88  70  87  70 /  30  40  30  50  40
TRI CITIES AIRPORT, TN              62  83  66  84  66 /  50  50  40  50  40

&&

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

LCM/DGS

Hazardous weather outlook, Jul 7, 6:07 AM EDT, 11 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
607 AM EDT MON JUL 7 2008

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-081015-
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-
607 AM EDT MON JUL 7 2008 /507 AM CDT MON JUL 7 2008/

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

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

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, 3:21 PM EDT, 2 hours 45 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
321 PM EDT MON JUL 7 2008

TNZ016-017-042-044-072000-
HAWKINS-NORTHWEST GREENE-SULLIVAN-WASHINGTON-
321 PM EDT MON JUL 7 2008

...A STRONG THUNDERSTORM WILL BE AFFECTING GREENE...HAWKINS...
SULLIVAN AND WASHINGTON COUNTIES...

AT 318 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR SURGOINSVILLE...MOVING EAST AT 29 MPH.

THIS STORM WILL BE NEAR...
  6 MILES SOUTH OF COLONIAL HEIGHTS BY 355 PM EDT.

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

IN ADDITION TO SMALL HAIL AND GUSTY WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES PRIMARY KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

DGS

Local storm report, Jul 7, 3:33 PM EDT, 2 hours 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
333 PM EDT MON JUL 07 2008

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

0835 PM     TSTM WND DMG     NE BRISTOL VA           36.61N 82.17W
07/06/2008                   CITY OF BRISTOL    VA   LAW ENFORCEMENT

            1 TREE DOWN NE OF BRISTOL. REPORTED BY DISPATCH.

0840 PM     TSTM WND DMG     NE BRISTOL VA           36.61N 82.17W
07/06/2008                   CITY OF BRISTOL    VA   LAW ENFORCEMENT

            1 TREE DOWN NE OF BRISTOL. REPORTED BY DISPATCH.

&&

SEP

Local storm report, Jul 7, 3:42 PM EDT, 2 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
342 PM EDT MON JUL 07 2008

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

1110 PM     TSTM WND DMG     HAYESVILLE              35.05N 83.82W
07/06/2008                   CLAY               NC   UTILITY COMPANY

            FEW TREES DOWN NEAR HAYESVILLE. REPORTED BY UTILITY
            COMPANY.

1225 AM     TSTM WND DMG     MURPHY                  35.09N 84.03W
07/07/2008                   CHEROKEE           NC   UTILITY COMPANY

            FEW TREES DOWN AROUND MURPHY. REPORTED BY UTILITY
            COMPANY.

1245 AM     TSTM WND DMG     NE COSBY                35.81N 83.25W
07/07/2008                   COCKE              TN   DEPT OF HIGHWAYS

            1 TREE DOWN NE OF COSBY. REPORTED BY HWY DEPT.

&&

SEP

Local storm report, Jul 7, 3:49 PM EDT, 2 hours 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
349 PM EDT MON JUL 07 2008

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

0340 PM     TSTM WND DMG     ROGERSVILLE             36.41N 83.01W
07/07/2008                   HAWKINS            TN   LAW ENFORCEMENT

            TREES DOWN IN ROGERSVILLE AND SURGOINSVILLE. REPORTED BY
            DISPATCHER.

&&

MEP

Special weather statement, Jul 7, 4:57 PM EDT, 1 hour 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
457 PM EDT MON JUL 7 2008

TNZ012>014-037-072200-
CAMPBELL-CLAIBORNE-SCOTT-UNION-
457 PM EDT MON JUL 7 2008

...STRONG THUNDERSTORMS WILL AFFECT CAMPBELL...CLAIBORNE...SCOTT AND
UNION COUNTIES THROUGH 6 PM...

AT 451 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
CLUSTER OF STRONG THUNDERSTORMS OVER THE NORTHERN CUMBERLAND
PLATEAU...MOVING SOUTHEAST AROUND 20 MPH.

WINDS UP TO AROUND 40 MPH...SMALL HAIL...AND LOCALLY HEAVY RAINFALL
WILL BE POSSIBLE WITH THESE STORMS.

IN ADDITION TO SMALL HAIL AND GUSTY WINDS...FREQUENT CLOUD TO GROUND
LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY
LIGHTNING IS ONE OF NATURES PRIMARY KILLERS. REMEMBER...IF YOU CAN
HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

DMG

Special weather statement, Jul 7, 6:00 PM EDT, 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
600 PM EDT MON JUL 7 2008

TNZ012>014-037-072300-
CAMPBELL-CLAIBORNE-SCOTT-UNION-
600 PM EDT MON JUL 7 2008

...STRONG THUNDERSTORMS WILL AFFECT CAMPBELL...CLAIBORNE...SCOTT AND
UNION COUNTIES THROUGH 7 PM...

AT 555 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
CLUSTER OF STRONG THUNDERSTORMS OVER THE NORTHERN CUMBERLAND
PLATEAU...MOVING SOUTHEAST AROUND 20 MPH.

WINDS UP TO AROUND 40 MPH...SMALL HAIL...AND LOCALLY HEAVY RAINFALL
WILL BE POSSIBLE WITH THESE STORMS.

IN ADDITION TO SMALL HAIL AND GUSTY WINDS...FREQUENT CLOUD TO GROUND
LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY
LIGHTNING IS ONE OF NATURES PRIMARY KILLERS. REMEMBER...IF YOU CAN
HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

DMG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 11:54 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Greene	66 min
Jul 7, 1:37 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Union	38 min
Jul 7, 1:45 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne	45 min
Jul 7, 3:24 PM EDT	Severe Thunderstorm Warning	MRX	Hawkins	36 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2008 Every severe thunderstorm warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.