Alert archive / Virginia / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 247, NWS Morristown, TN

July 22, 2008Russell County, Scott County, Washington County, Virginia

NWS Morristown, TN issued this severe thunderstorm warning at Jul 22, 2008, 7:53 PM EDT for Russell County, Scott County, Washington County, Virginia. It was in force for 52 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: Jul 22, 2008, 7:53 PM EDT (23:53 UTC)
Expired: Jul 22, 2008, 8:45 PM EDT
In force: 52 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Russell County, VA, Scott County, VA, Washington County, VA

The radar

The Knoxville radar (KMRX), 126 km from the middle of the area, began a volume at 23:55 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 22, 3:20 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.9 hours before the alert went out and 222 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: 613 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 1837 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 7 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 Jul 22, 7:45 PM EDT, 8 minutes earlier.

Area forecast discussion, Jul 22, 7:45 PM EDT, 8 minutes before

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Hazardous weather outlook, Jul 22, 9:30 AM EDT, 10 hours 23 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
930 AM EDT TUE JUL 22 2008

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-231000-
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-
930 AM EDT (830 AM CDT) TUE JUL 22 2008

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

.DAY ONE...TODAY AND TONIGHT

A COMPLEX OF THUNDERSTORMS OVER THE OHIO RIVER VALLEY WILL MOVE
SOUTHEAST INTO THE SOUTHERN APPALACHIAN REGION THIS AFTERNOON AND
EVENING. SOME OF THESE STORMS WILL LIKELY BE SEVERE...PRODUCING
DAMAGING WINDS...LARGE HAIL...FREQUENT CLOUD TO GROUND LIGHTNING AND
LOCALLY HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY

A WEAK COLD FRONT WILL MOVE INTO THE REGION ON WEDNESDAY...WITH
SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPING AGAIN. SOME OF THESE
STORMS COULD POSSIBLY BE SEVERE...PRODUCING DAMAGING WINDS...LARGE
HAIL...FREQUENT CLOUD TO GROUND LIGHTNING AND LOCALLY HEAVY
RAINFALL.

ANOTHER COLD FRONT WILL SLOWLY APPROACH THE REGION BY THE END OF THE
WEEK...WITH ISOLATED SEVERE THUNDERSTORMS POSSIBLE EACH DAY FROM
FRIDAY THROUGH SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING...AND AGAIN
ON WEDNESDAY.

In the hours before

Local storm report, Jul 22, 6:30 PM EDT, 1 hour 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
630 PM EDT TUE JUL 22 2008

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

0615 PM     TSTM WND DMG     GATLINBURG              35.72N 83.49W
07/22/2008                   SEVIER             TN   LAW ENFORCEMENT

            TREES AND POWER LINES DOWN IN GATLINBURG.

&&

SEP

Local storm report, Jul 22, 6:37 PM EDT, 1 hour 16 minutes before

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Special weather statement, Jul 22, 6:37 PM EDT, 1 hour 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
637 PM EDT TUE JUL 22 2008

TNZ071>074-222330-
BLOUNT SMOKY MOUNTAINS-NORTH SEVIER-NW BLOUNT-SEVIER SMOKY MOUNTAINS-
637 PM EDT TUE JUL 22 2008

...STRONG THUNDERSTORMS WILL BE AFFECT BLOUNT AND SEVIER COUNTIES
THROUGH 730 PM...

AT 634 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
CLUSTER OF STRONG THUNDERSTORM OVER WEARS VALLEY...MOVING NORTHEAST
AT 25 MPH.

WINDS UP TO 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM THIS
EVENING.

DMG

Local storm report, Jul 22, 6:57 PM EDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
657 PM EDT TUE JUL 22 2008

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

0652 PM     HAIL             JOHNSON CITY            36.33N 82.37W
07/22/2008  E0.75 INCH       WASHINGTON         TN   AMATEUR RADIO

            PENNY HAIL IN JOHNSON CITY.

&&

SEP

Special weather statement, Jul 22, 7:01 PM EDT, 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
701 PM EDT TUE JUL 22 2008

NCZ061-222345-
CLAY-
701 PM EDT TUE JUL 22 2008

...A STRONG THUNDERSTORM WILL BE AFFECTING CLAY COUNTY...

AT 700 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 5 MILES EAST OF HAYESVILLE...MOVING EAST AT 15
MPH.

SMALL HAIL...AND WINDS AROUND 40 MPH ARE EXPECTED WITH THIS STORM.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1100 PM EDT
TONIGHT FOR THE LOCAL AREA.

GM

Local storm report, Jul 22, 7:38 PM EDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
738 PM EDT TUE JUL 22 2008

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

0730 PM     TSTM WND DMG     3 NE BYBEE              36.07N 83.14W
07/22/2008                   COCKE              TN   LAW ENFORCEMENT

            TREES DOWN ACROSS THE NORTHEASTERN PORTION OF THE COUNTY.

&&

SEP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 1:57 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Sequatchie	48 min
Jul 22, 2:35 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Meigs, Rhea	55 min
Jul 22, 3:20 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton, Marion	55 min
Jul 22, 3:23 PM EDT	Areal Flood Advisory	MRX	Bledsoe, Hamilton, Rhea, Sequatchie	3 hr
Jul 22, 3:35 PM EDT	Severe Thunderstorm Warning	MRX	Meigs, Rhea, Roane	55 min
Jul 22, 3:46 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Scott	59 min
Jul 22, 3:52 PM EDT	Severe Thunderstorm Warning	MRX	Morgan	53 min
Jul 22, 3:58 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Meigs, Rhea, Sequatchie	62 min
Jul 22, 4:10 PM EDT	Severe Thunderstorm Warning	MRX	Roane	35 min
Jul 22, 4:19 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton	56 min
Jul 22, 4:39 PM EDT	Severe Thunderstorm Warning	MRX	Polk	66 min
Jul 22, 4:43 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Claiborne, Morgan, Scott, Union	62 min
Jul 22, 4:53 PM EDT	Areal Flood Advisory	MRX	Polk	112 min
Jul 22, 5:07 PM EDT	Severe Thunderstorm Warning	MRX	Morgan, Scott	53 min
Jul 22, 5:11 PM EDT	Severe Thunderstorm Warning	MRX	Morgan, Scott	49 min
Jul 22, 5:23 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Sevier	37 min
Jul 22, 5:32 PM EDT	Severe Thunderstorm Warning	MRX	Monroe, Polk	58 min
Jul 22, 5:59 PM EDT	Severe Thunderstorm Warning	MRX	Sevier	31 min
Jul 22, 6:08 PM EDT	Areal Flood Advisory	MRX	Sevier	112 min
Jul 22, 6:46 PM EDT	Areal Flood Advisory	MRX	Polk	59 min
Jul 22, 6:48 PM EDT	Severe Thunderstorm Warning	MRX	Washington	42 min
Jul 22, 7:16 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Greene	59 min
Jul 22, 7:24 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan	66 min
Jul 22, 7:30 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Hawkins	60 min
Jul 22, 6:14 PM EDT	Severe Thunderstorm Warning	MRX	Cherokee, Clay	46 min
Jul 22, 6:22 PM EDT	Areal Flood Advisory	MRX	Cherokee, Clay	3 hr

Nearby

Severe Thunderstorm Warnings in Virginia, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.