Isolated to widely scattered convection developed during the evening in moderately unstable atmosphere across the Tennessee Valley of East Tennessee. Severe convection remained limited across the region.
Every event with a place to put it. Tap one for its entry below.
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.
The episode as NWS MRX wrote it up.
Isolated to widely scattered convection developed during the evening in moderately unstable atmosphere across the Tennessee Valley of East Tennessee. Severe convection remained limited across the region.
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 Jul 19, 2:25 PM EST, 3 hours 55 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 325 PM EDT MON JUL 19 2010 .SHORT TERM (TONIGHT THROUGH WEDNESDAY NIGHT)...SUBSIDENCE BEHIND MCS WHICH MOVED THROUGH THE SOUTHERN APPALACHIAN REGION EARLIER IN THE DAY IS EFFECTIVELY SUPPRESSING CONVECTIVE PRECIP SO ADJUSTED POPS BACK TO SLIGHT CHANCE EVENING HOURS. NEXT CONVECTIVE SYSTEM IN THE MCS WAVE TRAIN EVIDENT IN SATELLITE AND RADAR IMAGERY OVER THE MIDWEST. 1000-500 MB THICKNESS PATTERN AND WEST NORTHWESTERLY MEAN FLOW SHOULD BRING THIS SYSTEM TOWARD THE FORECAST AREA LATER TONIGHT. NOT CONVINCED THAT IT WILL HOLD TOGETHER SUFFICIENTLY FOR WIDESPREAD HIGHER POPS SO USED SLIGHT AND LOW CHANCE POPS FOR THE POSSIBILITY. MODELS HAVE A TRAILING MESOSCALE CONVECTIVE SYSTEM MOVE ACROSS THE FORECAST AREA ON TUESDAY. STAYED WITH A SLIGHT THROUGH MEDIUM CHANCE PROBABILITY FOR CONVECTION WITH EMPHASIS IN THE HIGHER TERRAIN. SOME UNCERTAINTY IN THE FORECAST FOR WEDNESDAY AS MODELS INDICATE UPPER RIDGE BEGINNING TO STRENGTHEN ACROSS THE SOUTHEASTERN U.S. BUT TRY TO INCREASE POPS TO SOME DEGREE WITH ADDITIONAL MCS ACTIVITY IN THE NEVER ENDING WEST NORTHWEST FLOW ALOFT. TRIED TO HAVE A LITTLE HIGHER CHANCE FOR CONVECTION ACROSS SOUTHWEST VIRGINIA AND NORTHEAST TENNESSEE CLOSER TO THE NORTHWARD ADVANCING MCS WAVE TRAIN. STAYED FAIRLY CLOSE TO MOS MAX/MIN TEMP GUIDANCE. HOWEVER...ADJUSTED MAXES A DEGREE OR TWO BELOW MOS BLEND FOR TUESDAY. .LONG TERM (THURSDAY THROUGH MONDAY)...A RIDGE OF HIGH PRESSURE WILL BE POSITIONED OVER THE SOUTHERN U.S. DURING THE FIRST HALF OF THE EXTENDED. THE RESULT WILL BE LIMITED CONVECTION...MAINLY DURING THE AFTERNOON HOURS WITH BEST CHANCE OVER HIGHER TERRAIN. A WEAKENING FRONTAL BOUNDARY WILL SLIDE INTO THE AREA SATURDAY NIGHT/SUNDAY. THERE SHOULD BE SUFFICIENT LOW LEVEL MOISTURE BUT LIFT WILL BE QUITE WEAK AND WILL KEEP POPS LOW ON SUNDAY. A SHORT WAVE TRACKS THROUGH THE REGION ON MONDAY FOR CONTINUED SLIGHT CHANCE POPS. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 73 92 74 94 73 / 20 20 10 20 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 72 90 72 92 73 / 20 20 10 20 10 OAK RIDGE, TN 72 89 72 92 73 / 20 20 10 20 10 TRI CITIES AIRPORT, TN 69 89 68 90 69 / 20 20 10 30 20 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && 99/MJB
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 500 AM EDT MON JUL 19 2010 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-201000- 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- 500 AM EDT (400 AM CDT) MON JUL 19 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST TENNESSEE...SOUTHWEST VIRGINIA AND EXTREME SOUTHWEST NORTH CAROLINA. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP ACROSS THE SOUTHERN APPALACHIAN REGION TODAY...WITH A FEW ISOLATED STORMS POSSIBLY BECOMING STRONG TO SEVERE DURING THE AFTERNOON AND EVENING HOURS. THE MAIN THREATS WILL BE THE POSSIBILITY OF DAMAGING WINDS... OCCASIONAL CLOUD TO GROUND LIGHTNING...AND LOCALLY HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP EACH DAY THROUGH WEDNESDAY...WITH A FEW ISOLATED STORMS POSSIBLY BECOMING STRONG TO SEVERE. THE MAIN THREATS WILL BE THE POSSIBILITY OF DAMAGING WINDS...OCCASIONAL CLOUD TO GROUND LIGHTNING...AND LOCALLY HEAVY RAINFALL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED DUE TO THE ISOLATED NATURE OF THE EXPECTED SEVERE THREAT. DMG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 422 PM EDT MON JUL 19 2010 TNZ035-036-067-192100- ANDERSON TN-MORGAN TN-ROANE TN- 422 PM EDT MON JUL 19 2010 ...SIGNIFICANT WEATHER ADVISORY FOR MORGAN...EXTREME WESTERN ANDERSON AND ROANE COUNTIES UNTIL 500 PM EDT... AT 418 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR WARTBURG...MOVING EAST AT 5 MPH. HAIL UP TO THE SIZE OF DIMES OR PENNIES AND WIND GUSTS UP TO 40 MPH ARE POSSIBLE WITH THIS STORM...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...OAKDALE...PETROS AND ROSEDALE. THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TD
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 520 PM EDT MON JUL 19 2010 TNZ035-067-192200- MORGAN TN-ROANE TN- 520 PM EDT MON JUL 19 2010 ...SIGNIFICANT WEATHER ADVISORY FOR MORGAN AND ROANE COUNTIES UNTIL 600 PM EDT... AT 513 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 6 MILES SOUTHEAST OF WARTBURG. THIS STORM WAS DRIFTING TO THE EAST AT LESS THAN 10 MPH. HAIL UP TO THE SIZE OF DIMES OR PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...HARRIMAN...DEARMOND AND PETROS. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. STAY AWAY FROM LARGE TREES...AS THESE WINDS COULD TAKE DOWN WEAKER TREES.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 601 PM EDT MON JUL 19 2010 TNZ035-067-192245- MORGAN TN-ROANE TN- 601 PM EDT MON JUL 19 2010 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN MORGAN AND ROANE COUNTIES UNTIL 645 PM EDT... AT 555 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR OAKDALE...OR AROUND 6 MILES NORTH OF KINGSTON...MOVING TO THE SOUTH OR SOUTHEAST AT 5 MPH. HAIL UP TO THE SIZE OF DIMES OR PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...ROCKWOOD... KINGSTON...HARRIMAN AND BRADBURY. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. GM
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 615 PM EDT MON JUL 19 2010 TNZ012-013-035-192300- CAMPBELL TN-MORGAN TN-SCOTT TN- 615 PM EDT MON JUL 19 2010 ...SIGNIFICANT WEATHER ADVISORY FOR SCOTT...CAMPBELL AND MORGAN COUNTIES UNTIL 700 PM EDT... AT 607 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A CLUSTER OF STRONG THUNDERSTORMS COVERING MUCH OF NORTHEASTERN MORGAN COUNTY...EXTENDING INTO MUCH OF CENTRAL AND EASTERN SCOTT COUNTY. THE CLUSTER OF STORMS WAS MOVING TO THE MOVING NORTHEAST AT ABOUT 15 MPH. SMALL HAIL AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...SLICK ROCK... KETCHEN...SMOKEY JUNCTION...NORMA...ELK VALLEY...ROYAL BLUE AND JELLICO. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. GM
The Knoxville radar (KMRX), 106 km away, was scanning. The volume nearest the first event began at 23:17 UTC.
2 thunderstorm wind, 1 flash flood. Local standard time, as filed.
A slow moving thunderstorm produced widespread flash flooding in the area. A bridge was also damaged by the flash flooding in Oakdale.
High wind flipped a boat dock at the Arrowhead Marina onto an adjacent boat dock.|Twenty five boats were damaged during the event and a HAZMAT team arrived at the scene to contain gasoline and oil leaks from the damaged boats.
Several trees were downed in Athens and northwest of Interstate 75 in the Pond Hill Community.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2010Every state in 2010This day in weather historyWarnings in Tennessee, July 2010
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: 262517, 238307, 238312.