Alert archive / Tennessee / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 196, NWS Morristown, TN

July 9, 2008Bradley County, Hamilton County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 9, 2008, 4:19 PM EDT for Bradley County, Hamilton 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 counties it named.

The facts

Issued: Jul 9, 2008, 4:19 PM EDT (20:19 UTC)
Expired: Jul 9, 2008, 5:00 PM EDT
In force: 41 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Bradley County, TN, Hamilton County, TN

The radar

The Northeast Alabama radar (KHTX), 101 km from the middle of the area, began a volume at 20:21 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 12:00Z, 8.3 hours before the alert went out and 179 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: 1146 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 962 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

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 9, 3:11 PM EDT, 1 hour 8 minutes earlier.

Area forecast discussion, Jul 9, 3:11 PM EDT, 1 hour 8 minutes before

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Hazardous weather outlook, Jul 9, 5:34 AM EDT, 10 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
534 AM EDT WED JUL 9 2008

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-101000-
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-
534 AM EDT WED JUL 9 2008 /434 AM CDT WED JUL 9 2008/

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

.DAY ONE...TODAY AND TONIGHT

A WEAK COLD FRONT WILL APPROACH THE SOUTHERN APPALACHIAN REGION
TODAY. AS A RESULT...SCATTERED TO NUMEROUS THUNDERSTORMS WILL BE
POSSIBLE DURING THE AFTERNOON AND EVENING HOURS. SOME ISOLATED
STORMS COULD BECOME SEVERE...PRODUCING STRONG GUSTY WINDS...LARGE
HAIL...FREQUENT CLOUD TO GROUND LIGHTNING...AND LOCALLY HEAVY
RAINFALL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THE FRONT WILL WEAKEN OVER THE AREA THURSDAY...WITH SCATTERED
THUNDERSTORMS STILL POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME...DUE TO THE
ISOLATED NATURE OF THE EXPECTED SEVERE WEATHER.

TD

In the hours before

Local storm report, Jul 9, 3:06 PM EDT, 1 hour 13 minutes before

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Local storm report, Jul 9, 3:25 PM EDT, 54 minutes before

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Local storm report, Jul 9, 3:33 PM EDT, 46 minutes before

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Local storm report, Jul 9, 3:41 PM EDT, 38 minutes before

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Local storm report, Jul 9, 3:42 PM EDT, 37 minutes before

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Special weather statement, Jul 9, 4:17 PM EDT, 2 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 12:21 AM EDT	Areal Flood Advisory	MRX	Blount, Loudon, Monroe	87 min
Jul 9, 1:15 AM EDT	Areal Flood Advisory	MRX	Polk	2 hr
Jul 9, 12:55 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan	50 min
Jul 9, 1:45 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan	30 min
Jul 9, 1:48 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Loudon, Roane	57 min
Jul 9, 1:59 PM EDT	Severe Thunderstorm Warning	MRX	McMinn, Monroe	61 min
Jul 9, 2:04 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Greene, Sullivan, Unicoi, Washington	26 min
Jul 9, 2:18 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Johnson, Sullivan	27 min
Jul 9, 2:34 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Loudon, Monroe, Roane	56 min
Jul 9, 3:01 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Monroe	59 min
Jul 9, 3:42 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Sevier	33 min
Jul 9, 5:14 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton	31 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.