Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 128, NWS Morristown, TN

June 10, 2009Monroe County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 10, 2009, 9:20 PM EDT for Monroe County, Tennessee. It was in force for 25 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
Jun 10, 2009, 9:20 PM EDT (01:20 UTC)
Expired
Jun 10, 2009, 9:45 PM EDT
In force
25 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon

County Monroe County, TN

The radar

The Knoxville radar (KMRX), 111 km from the middle of the area, began a volume at 01:21 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, 1.3 hours before the alert went out and 225 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 2009-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2108 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 2009-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 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
2108 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1123 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.8

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 Jun 10, 8:15 PM EDT, 1 hour 5 minutes earlier.

Area forecast discussion, Jun 10, 8:15 PM EDT, 1 hour 5 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
815 PM EDT WED JUN 10 2009

.AVIATION...PATHCES OF RAIN SHOWERS WITH EMBEDDED THUNDERSTORMS IN
CENTRAL TO NORTHEAST TENNESSEE, ALL MOVING FAIRLY RAPIDLY SOUTHEAST.
SHOULD BE OUT OF AREA BY ABOUT 03Z. CLOUDS WILL BE PATCHY AFTER THAT
WITH THICKEST COVERAGE IN THE NORTHEAST NEAR TRI. THIS WILL INHIBIT
FOG DEVLOPMENT TO SOME DEGREE. TYS MAY GET A LITTLE BETTER CHANCE
FOR FOG, BUT ANOTHER ROUND OF CLOUDS IS MOVING TOWARD AREA FROM
BLOWOFF FROM CENTRAL U.S. STORMS.

THURSDAY LOOKS TO BE MORE ACTIVE AS A FRONT APPROACHES FROM
NORTHWEST AND SOME SUN KICKS IN BEFORE. BIGGEST THREATS WILL BE
HEAVY RAIN AND WIND. EXPECT VARIABLE CIGS AND VSBYS OVERNIGHT WITH
BEST CONDITIONS AT CHA.
&&

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

&&

BB
Hazardous weather outlook, Jun 10, 4:14 AM EDT, 17 hours 6 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
414 AM EDT WED JUN 10 2009

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-110815-
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-
414 AM EDT WED JUN 10 2009 /314 AM CDT WED JUN 10 2009/

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

.DAY ONE...TODAY AND TONIGHT

ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP...MAINLY THIS
AFTERNOON AND LINGER THROUGHOUT THE EVENING AND OVERNIGHT. A FEW
STRONG TO SEVERE STORMS WILL BE POSSIBLE...ESPECIALLY THIS
AFTERNOON AND EVENING. THE MAIN THREATS WILL BE DAMAGING WINDS OF
50 MPH OR MORE AND HAIL OF PENNY SIZE OR LARGER. BRIEF LOCALLY
HEAVY RAINS COULD OCCUR WITH THE STRONGEST STORMS...WITH FREQUENT
DEADLY LIGHTNING STRIKES IN AND NEAR ALL STORMS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

 A WEAK COLD FRONT MOVING SLOWLY SOUTH INTO THE REGION IS EXPECTED
TO INCREASE THE COVERAGE OF THUNDERSTORMS THURSDAY AND THURSDAY
NIGHT. SCATTERED STRONG TO SEVERE STORMS WILL BE POSSIBLE...WITH
THE MAIN THREATS DAMAGING DOWN BURSTS WINDS OF 50 MPH OR HIGHER...
AND LARGE HAIL.

OTHERWISE...ISOLATED STRONG TO SEVERE THUNDERSTORMS WILL BE
POSSIBLE JUST ABOUT EACH AFTERNOON AND EVENING...FROM FRIDAY INTO
EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED...MAINLY TODAY AND THURSDAY.

TG

In the hours before

Special weather statement, Jun 10, 7:34 PM EDT, 1 hour 46 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
734 PM EDT WED JUN 10 2009

TNZ012-013-035-036-067-110015-
ANDERSON-CAMPBELL-MORGAN-ROANE-SCOTT-
734 PM EDT WED JUN 10 2009

...A STRONG THUNDERSTORM WILL BE AFFECTING ANDERSON...EXTREME
SOUTHWESTERN CAMPBELL...EASTERN MORGAN...NORTHERN ROANE AND EXTREME
SOUTHERN SCOTT COUNTIES...

AT 729 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 12 MILES NORTH OF OLIVER SPRINGS...MOVING
SOUTHEAST AT 20 MPH.

LOCATIONS IN THE PATH OF THE STORM INCLUDE...OLIVER SPRINGS AND
CLINTON.

SMALL HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM.
SEEK SHELTER DURING THE HEIGHT OF THE STORM.

GM
Special weather statement, Jun 10, 7:44 PM EDT, 1 hour 36 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
744 PM EDT WED JUN 10 2009

TNZ069-071-073-074-110030-
KNOX-NORTH SEVIER-NW BLOUNT-SEVIER SMOKY MOUNTAINS-
744 PM EDT WED JUN 10 2009

...A STRONG THUNDERSTORM WILL BE AFFECTING BLOUNT...EASTERN KNOX AND
SEVIER COUNTIES...

AT 738 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 11 MILES EAST OF KNOXVILLE...MOVING SOUTHEAST AT
20 MPH.

LOCATIONS IN THE PATH OF THE STORM INCLUDE...
  KNOXVILLE...SEVIERVILLE...PIGEON FORGE... AND GATLINBURG.

SMALL HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM.
WEAK TREES CAN BE KNOCKED DOWN BY GUSTY OUTFLOW WINDS FROM STRONG
STORMS.  SEEK SHELTER DURING THE HEIGHT OF THE STORM.

GM
Local storm report, Jun 10, 8:27 PM EDT, 53 minutes before
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Local storm report, Jun 10, 8:40 PM EDT, 40 minutes before
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Local storm report, Jun 10, 8:53 PM EDT, 27 minutes before
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Local storm report, Jun 10, 9:05 PM EDT, 15 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 8:07 PM EDTSevere Thunderstorm WarningMRXLoudon, Morgan, Roane38 min
Jun 10, 8:19 PM EDTTornado WarningMRXLoudon, Morgan, Roane26 min
Jun 10, 8:42 PM EDTSevere Thunderstorm WarningMRXBlount, Loudon, Monroe48 min
Jun 10, 8:48 PM EDTSevere Thunderstorm WarningMRXLoudon, Roane27 min
Jun 11, 11:56 AM EDTSevere Thunderstorm WarningMRXBledsoe, Sequatchie64 min
Jun 11, 12:27 PM EDTSevere Thunderstorm WarningMRXHamilton, Marion48 min
Jun 11, 12:40 PM EDTSevere Thunderstorm WarningMRXMeigs, Rhea50 min
Jun 11, 12:44 PM EDTSevere Thunderstorm WarningMRXMorgan, Roane61 min
Jun 11, 12:50 PM EDTSevere Thunderstorm WarningMRXScott55 min
Jun 11, 12:54 PM EDTSevere Thunderstorm WarningMRXBradley, McMinn, Monroe, Polk51 min
Jun 11, 1:12 PM EDTSevere Thunderstorm WarningMRXAnderson, Campbell63 min
Jun 11, 1:18 PM EDTSevere Thunderstorm WarningMRXBlount, Loudon, McMinn, Meigs, Monroe57 min
Jun 11, 1:28 PM EDTSevere Thunderstorm WarningMRXBlount, Knox62 min
Jun 11, 1:44 PM EDTSevere Thunderstorm WarningMRXBlount, Monroe, Polk46 min
Jun 11, 1:52 PM EDTSevere Thunderstorm WarningMRXClaiborne, Grainger, Union53 min
Jun 11, 2:11 PM EDTSevere Thunderstorm WarningMRXHamblen, Jefferson, Sevier64 min
Jun 11, 2:14 PM EDTSevere Thunderstorm WarningMRXBlount, Sevier61 min
Jun 11, 2:45 PM EDTSevere Thunderstorm WarningMRXClaiborne, Grainger, Hancock30 min
Jun 11, 2:57 PM EDTSevere Thunderstorm WarningMRXCocke, Greene, Hawkins63 min
Jun 11, 3:04 PM EDTSevere Thunderstorm WarningMRXCocke, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more26 min
Jun 11, 3:31 PM EDTSevere Thunderstorm WarningMRXUnicoi49 min
Jun 11, 3:36 PM EDTSevere Thunderstorm WarningMRXSullivan, Washington54 min
Jun 11, 4:11 PM EDTSevere Thunderstorm WarningMRXCarter34 min
Jun 11, 4:29 PM EDTSevere Thunderstorm WarningMRXJohnson, Sullivan46 min
Jun 11, 3:50 PM EDTSevere Thunderstorm WarningMRXScott55 min
Jun 11, 4:21 PM EDTSevere Thunderstorm WarningMRXWise, City of Norton39 min
Jun 11, 2:38 PM EDTSevere Thunderstorm WarningMRXCherokee, Clay41 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2009Every severe thunderstorm warning in 2009

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.