Thunderstorm Wind, Marion
- When
- September 27, 9:50 AM CST
- Where
- Marion County, 1.7 mi W of Sequatchie
- Measured
- 50 kt (58 mph) estimated gust
- Reported by
- Law Enforcement
- Coordinates
- 35.120, -85.630
Two trees were reported down on Highway 150.
Damaging Winds in Tennessee, September 27, 2010
A large cut off upper level low positioned over Northern Mississippi finally began to open and shift northeast toward the Southern Appalachian Mountains while surface low pressure moved north across Southeast Tennessee. The atmospheric environment was characterized by weak to moderate instability in the vicinity of the upper low with only marginal shear.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 2
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS MRX wrote it up.
A large cut off upper level low positioned over Northern Mississippi finally began to open and shift northeast toward the Southern Appalachian Mountains while surface low pressure moved north across Southeast Tennessee. The atmospheric environment was characterized by weak to moderate instability in the vicinity of the upper low with only marginal shear. Isolated severe convection developed across Southeast Tennessee.
What forecasters said that day
The local office's own words before the first event, 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 the first event at Sep 27, 7:40 AM CST, 2 hours 10 minutes earlier.
Area forecast discussion, Sep 27, 7:40 AM CST, 2 hours 10 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 940 AM EDT MON SEP 27 2010 .DISCUSSION...AN UPPER TROUGH OVER THE OHIO-TENNESSEE VALLEYS WILL KEEP THE FORECAST AREA UNDER FAVORABLE SYNOPTIC LIFT TODAY. ASSOCIATED 90-100KT UPPER JET WILL PRODUCE DIVERENCE ALOFT OVER THE REGION AS WELL AS STRONG Q-VECTOR FORCING (LARGE SCALE ASCENT). THE COLD AIR ALOFT ASSOCIATED WITH UPPER TROUGH WILL HELP DESTABILIE THE AIRMASS FOR TODAY PRODUCING SCATTERED THUNDERSTORMS. AN AREA OF CONVECTION IS ALREADY MOVING NORTHEAST ACROSS NORTHERN ALABAMA. LATEST MODELS SHOW CAPES OVER 500 J/KG THIS AFTERNOON. WILL NEED TO WATCH THE POTENTIAL OF HAIL WITH THE STRONGER STORMS DUE TO THE LOW FREEZING LEVELS. LOCALIZED HEAVY RAINFALL IS ALSO ANTICIPATED. CURRENT FORECAST LOOKS GOOD. WILL UPDATE HWO FOR THE POTENTIAL OF HAIL TODAY. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 72 56 76 52 79 / 80 30 20 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 71 55 75 51 77 / 90 60 30 10 10 OAK RIDGE, TN 71 56 74 49 77 / 80 60 30 10 10 TRI CITIES AIRPORT, TN 69 52 71 48 74 / 100 80 40 20 10 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && DH
Hazardous weather outlook, Sep 27, 7:47 AM CST, 2 hours 3 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE MORRISTOWN TN 947 AM EDT MON SEP 27 2010 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-281400- 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- 947 AM EDT MON SEP 27 2010 /847 AM CDT MON SEP 27 2010/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT ...SMALL HAIL AND LOCALLY HEAVY RAINFALL POSSIBLE TODAY... A STRONG UPPER-LEVEL LOW WILL MOVE ACROSS THE SOUTHERN APPALACHIAN REGION TODAY...CREATING OCCASIONAL SHOWERS AND SCATTERED THUNDERSTORMS WITH THE POSSIBILITY OF LOCALLY HEAVY RAINFALL IN A FEW AREAS. DUE TO THE COLD AIR ALOFT...THE STRONGER STORMS MAY PRODUCE HAIL UP TO ONE-HALF INCH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED.
In the hours before
Special weather statement, Sep 27, 7:38 AM CST, 2 hours 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 938 AM EDT MON SEP 27 2010 TNZ098-271445- MARION TN- 838 AM CDT MON SEP 27 2010 ...SIGNIFICANT WEATHER ADVISORY FOR MARION COUNTY UNTIL 945 AM CDT... AT 830 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 10 MILES WEST OF BRIDGEPORT...MOVING NORTHEAST AT 15 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...JASPER...SOUTH PITTSBURG...MONTEAGLE...WHITWELL...ORME...HALETOWN (GUILD)...MARTIN SPRINGS...POWELLS CROSSROADS AND GRIFFITH CREEK. 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 ASSOCIATED WITH THUNDERSTORMS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. LOCALLY HEAVY RAINS...IN EXCESS OF ONE INCH PER HOUR...MAY OCCUR WITH THESE THUNDERSTORMS. MOTORISTS SHOULD BE ALERT FOR PONDING OF WATER ON ROADWAYS...AND POSSIBLE MINOR FLOODING OF LOW LYING AREAS. DO NOT DRIVE THROUGH WATERS OF UNKNOWN DEPTH. TURN AROUND! DON'T DROWN! DH
Special weather statement, Sep 27, 8:38 AM CST, 1 hour 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 1038 AM EDT MON SEP 27 2010 TNZ081-098-099-271545- HAMILTON TN-MARION TN-SEQUATCHIE TN- 938 AM CDT MON SEP 27 2010 ...SIGNIFICANT WEATHER ADVISORY FOR MARION...HAMILTON AND SEQUATCHIE COUNTIES UNTIL 1045 AM CDT/1145 AM EDT/... AT 936 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR SOUTH PITTSBURG...OR 7 MILES WEST OF JASPER...MOVING NORTHEAST AT 10 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...JASPER...MONTEAGLE... WHITWELL...HALETOWN (GUILD)...MARTIN SPRINGS...GRIFFITH CREEK... POWELLS CROSSROADS...CARTWRIGHT AND LONE OAK. SUSTAINED WINDS OR GUSTS UP TO 40 TO 50 MPH...HAIL OF PEA TO LESS THAN QUARTER SIZE...AND FREQUENT CLOUD TO GROUND LIGHTNING WILL BE POSSIBLE WITH THESE THUNDERSTORMS. ANY FURTHER STRENGTHENING OF THESE STORMS MAY REQUIRE ISSUANCE OF A WARNING. 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 ASSOCIATED WITH THUNDERSTORMS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. DH
The radar
The Northeast Alabama radar (KHTX), 46 km away, was scanning. The volume nearest the first event began at 15:47 UTC.
Event by event
2 thunderstorm wind. Local standard time, as filed.
Thunderstorm Wind, Polk
- When
- September 27, 2:42 PM EST
- Where
- Polk County, 2.37 mi ESE of Grassy Creek
- Measured
- 50 kt (58 mph) estimated gust
- Reported by
- Law Enforcement
- Coordinates
- 34.990, -84.440
A few trees were reported down on Grassy Creek Road four miles southwest of Ducktown.
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornado and Flash Flooding in North Carolina, September 27 to 30, 2010
- Flash Flooding and Flood in North Carolina, September 27, 2010
- Tornado and Hail in North Carolina, September 27, 2010
- Tornado and Hail in Georgia, September 27, 2010
- Dense Fog in Virginia, September 27, 2010
- Tornado in Virginia, September 27, 2010
- Tornado in Pennsylvania, September 27, 2010
- Tornado in Pennsylvania, September 27, 2010
- Hail and Damaging Winds in South Carolina, September 27, 2010
- Marine Thunderstorm Winds in South Atlantic Coastal Waters, September 27, 2010
- Flooding in Nebraska, September 27 to 30, 2010
- Flooding in Minnesota, September 27 to 30, 2010
More
Every storm in Tennessee in 2010Every state in 2010This day in weather historyWarnings in Tennessee, September 2010
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 256309, 256311.