Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 332, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Dec 8, 2009, 5:34 PM CST for Marion County, Sequatchie County, Tennessee. It was in force for 13 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
- Dec 8, 2009, 5:34 PM CST (23:34 UTC)
- Expired
- Dec 8, 2009, 5:47 PM CST
- In force
- 13 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
Counties Marion County, TN, Sequatchie County, TN
The radar
The Northeast Alabama radar (KHTX), 63 km from the middle of the area, began a volume at 23:38 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, 11.6 hours before the alert went out and 138 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 536 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 225 m²/s²
- 0-3 km storm-relative helicity
- 303 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Dec 8, 5:20 PM CST, 14 minutes earlier.
Area forecast discussion, Dec 8, 5:20 PM CST, 14 minutes before
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</html>Hazardous weather outlook, Dec 8, 1:39 PM CST, 3 hours 55 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE MORRISTOWN TN 239 PM EST TUE DEC 8 2009 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-091945- 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- 239 PM EST TUE DEC 8 2009 /139 PM CST TUE DEC 8 2009/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...THIS AFTERNOON AND TONIGHT A STRONG LOW PRESSURE WILL DEVELOP ACROSS THE SOUTHERN PLAINS THEN MOVE NORTHEAST TO THE WESTERN GREAT LAKES TUESDAY THROUGH WEDNESDAY. THE TIGHTENING PRESSURE GRADIENT AROUND THIS LOW PRESSURE WILL INCREASE THE SOUTHERLY WINDS ALOFT ACROSS THE TENNESSEE VALLEY AND SOUTHERN APPALACHIANS. VERY STRONG AND GUSTY SOUTHERLY WINDS ARE POSSIBLE ACROSS THE HIGHER ELEVATIONS AND FOOTHILLS OF THE FAR EASTERN TENNESSEE MOUNTAINS...SOUTHWEST VIRGINIA...AND EXTREME SOUTHWEST NORTH CAROLINA. WIDESPREAD WIND DAMAGE APPEARS LIKELY. SEE MEMNPWMRX FOR MORE DETAILS. A LINE OF SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS EAST TENNESSEE... SOUTHWEST VIRGINIA...AND SOUTHWEST NORTH CAROLINA LATE TONIGHT AND EARLY WEDNESDAY MORNING. DUE TO THE VERY STRONG WINDS ALOFT...THESE STORMS MAY PRODUCE DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY VERY WINDY CONDITIONS WILL CONTINUE THROUGH THE DAY ON WEDNESDAY WITH SOUTHWEST WINDS BETWEEN 25 AND 40 MPH WITH GUSTS UP TO 60 MPH ACROSS THE HIGHER ELEVATIONS. FROZEN PRECIPITATION IS POSSIBLE ON FRIDAY NIGHT AND POSSIBLY SATURDAY...MOST LIKELY FALLING AS SNOW OR SLEET. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE NEEDED TODAY THROUGH WEDNESDAY FOR WIND DAMAGE REPORTS. DH
In the hours before
Special weather statement, Dec 8, 2:34 PM CST, 3 hours before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 334 PM EST TUE DEC 8 2009 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-090600- 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- INCLUDING THE CITIES OF...MURPHY...HAYESVILLE...ONEIDA... LA FOLLETTE...TAZEWELL...SNEEDVILLE...ROGERSVILLE...KINGSPORT... BRISTOL...MOUNTAIN CITY...WARTBURG...CLINTON...OAK RIDGE... MAYNARDVILLE...RUTLEDGE...MORRISTOWN...NEWPORT...COSBY... GREENEVILLE...CEDAR CREEK...JOHNSON CITY...ERWIN...ELIZABETHTON... ROAN MOUNTAIN...KINGSTON...LENOIR CITY...KNOXVILLE...DANDRIDGE... MARYVILLE...CADES COVE...SEVIERVILLE...GATLINBURG...DUNLAP... PIKEVILLE...DAYTON...DECATUR...ATHENS...MADISONVILLE... COKER CREEK...JASPER...CHATTANOOGA...CLEVELAND...BENTON... DUCKTOWN...JONESVILLE...WISE...NORTON...GATE CITY...LEBANON... ABINGDON 334 PM EST TUE DEC 8 2009 /234 PM CST TUE DEC 8 2009/ ...A LINE OF STRONG TO SEVERE SHOWERS AND THUNDERSTORMS EXPECTED OVERNIGHT... A POWERFUL STORM SYSTEM ACROSS THE PLAIN STATES WILL PULL A COLD FRONT EAST THROUGH THE TENNESSEE VALLEY AND SOUTHERN APPALACHIANS OVERNIGHT. THE TIGHT PRESSURE GRADIENTS AROUND THIS SYSTEM HAS PRODUCED STRONG SOUTHERLY WINDS ALOFT. THE SOUTHERLY WINDS WILL PULL MOISTURE AND INSTABILITY BACK INTO THE TENNESSEE VALLEY. THE COLD FRONT WILL PRODUCE A LINE OF SHOWERS AND THUNDERSTORMS ACROSS EAST TENNESSEE...SOUTHWEST VIRGINIA...AND SOUTHWEST NORTH CAROLINA OVERNIGHT AND EARLY WEDNESDAY MORNING. DUE TO THE STRONG WINDS ALOFT...THESE THUNDERSTORMS MAY PRODUCE DAMAGING STRAIGHT LINE WINDS IN EXCESS OF 60 MPH. DAMAGE TO TREES AND POWER LINES ARE POSSIBLE. PLEASE STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR UPDATES. DH
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 8, 2:57 AM CST | High Wind Warning | MRX | Blount, Carter, Cocke, Greene, Johnson, McMinn and 6 more | 39 hr |
| Dec 8, 2:57 AM CST | Wind Advisory | MRX | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 25 more | 39 hr |
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.