Severe convection developed along a stationary frontal boundary in place across East Tennessee during the afternoon and evening hours. Development was aided by moderate to strong instability in the presence of a weak short wave trough migrating east across Northern Middle Tennessee.
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.
Severe convection developed along a stationary frontal boundary in place across East Tennessee during the afternoon and evening hours. Development was aided by moderate to strong instability in the presence of a weak short wave trough migrating east across Northern Middle Tennessee.
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 26, 8:18 AM CST, 3 hours 40 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 1018 AM EDT MON JUL 26 2010 .DISCUSSION...WEAK BOUNDARY LIES ACROSS THE SOUTHERN PART OF THE FORECAST AREA WITH INCREASED LOW LEVEL MOISTURE ACROSS THE FORECAST AREA THIS MORNING. TEMPERATURES ARE RISING A LITTLE SLOWER TODAY AND NOT SURE WE WILL REACH FORECAST HIGHS IN THE MID 90S EVEN AFTER WARM START. RUC AND OTHER SHORT RANGE MODELS SHOWING CONVECTION SHOULD BE DEVELOPING EARLIER TODAY WITH MOST UNSTABLE AREA IN THE SOUTHERN THIRD. PRECIPITABLE WATER VALUES ARE HIGHEST THERE TOO OVER TWO INCHES. A FEW STORMS COULD BE STRONG WITH HIGH WINDS AND LOCALLY HEAVY RAINS. WILL RAISE POPS ABOUT 10 PERCENT IN THE SOUTH AND ADJUST HIGHS DOWN A COUPLE DEGREES ALL AREAS. UPDATE OUT SOON. && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && TD
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 1056 AM EDT MON JUL 26 2010 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-271500- 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- 1056 AM EDT MON JUL 26 2010 /956 AM CDT MON JUL 26 2010/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT HOT AND HUMID CONDITIONS WILL CONTINUE TODAY...ALTHOUGH HIGH TEMPERATURES SHOULD BE A FEW DEGREES COOLER THAN YESTERDAY. HEAT INDEX VALUES WILL STILL REACH NEAR 100 DEGREES AT THE LOWER ELEVATIONS AND AS HIGH AS AROUND 105 IN THE CHATTANOOGA METROPOLITAN AREA. SCATTERED THUNDERSTORMS CAN BE ALSO BE EXPECTED AGAIN...AND A FEW OF THESE COULD BECOME SEVERE WITH THE MAIN THREAT BEING DAMAGING WINDS. LOCALLY HEAVY RAIN IS POSSIBLE WITH SLOW MOVEMENT OF THUNDERSTORMS AND MAY CAUSE LOCALIZED FLOODING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY SCATTERED TO ISOLATED THUNDERSTORMS CAN BE EXPECTED AT TIMES DURING THE PERIOD...AND A FEW OF THESE COULD BECOME SEVERE...WITH THE MAIN THREATS BEING DAMAGING WINDS AND LARGE HAIL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. TD
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
1059 AM EDT MON JUL 26 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0643 PM TSTM WND DMG 7 NNE DUCKTOWN 35.13N 84.34W
07/25/2010 POLK TN UTILITY COMPANY
SEVERAL TREES AND POWERLINES DOWN IN THE FARNER AND
TURTLETOWN AREAS. REPORTED BY TRI-STATE ELECTRIC.
0730 PM TSTM WND DMG 9 WNW MURPHY 35.14N 84.17W
07/25/2010 CHEROKEE NC UTILITY COMPANY
SEVERAL TREES AND POWERLINES DOWN AROUND THE HIWASSEE DAM
AREA. REPORTED BY BLUE RIDGE MOUNTAIN ELECTRIC.
&&
JORDAN/FERRELLSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 1218 PM EDT MON JUL 26 2010 NCZ060-061-TNZ012>017-035>040-042-044-046-067>071-073-081>087- 098>102-270000- CHEROKEE-CLAY-SCOTT TN-CAMPBELL-CLAIBORNE-HANCOCK-HAWKINS- SULLIVAN-MORGAN-ANDERSON-UNION-GRAINGER-HAMBLEN-NORTHWEST COCKE- NORTHWEST GREENE-WASHINGTON TN-NORTHWEST CARTER-ROANE-LOUDON-KNOX- JEFFERSON-NW BLOUNT-NORTH SEVIER-SEQUATCHIE-BLEDSOE-RHEA-MEIGS- MCMINN-NORTHWEST MONROE-SOUTHEAST MONROE-MARION-HAMILTON-BRADLEY- WEST POLK-EAST POLK- INCLUDING THE CITIES OF...MURPHY...HAYESVILLE...ONEIDA... LA FOLLETTE...TAZEWELL...SNEEDVILLE...ROGERSVILLE...KINGSPORT... BRISTOL...WARTBURG...CLINTON...OAK RIDGE...MAYNARDVILLE... RUTLEDGE...MORRISTOWN...NEWPORT...GREENEVILLE...JOHNSON CITY... ELIZABETHTON...KINGSTON...LENOIR CITY...KNOXVILLE...DANDRIDGE... MARYVILLE...SEVIERVILLE...DUNLAP...PIKEVILLE...DAYTON...DECATUR... ATHENS...MADISONVILLE...COKER CREEK...JASPER...CHATTANOOGA... CLEVELAND...BENTON...DUCKTOWN 1218 PM EDT MON JUL 26 2010 /1118 AM CDT MON JUL 26 2010/ ...HOT AND HUMID CONDITIONS WILL CONTINUE TODAY... HOT AND HUMID CONDITIONS WILL CONTINUE ACROSS THE REGION TODAY. CLOUD COVER HAD INCREASED SOMEWHAT THIS MORNING BUT HAS DECREASED AGAIN. HIGH TEMPERATURES IN THE LOWER TO MID 90S COMBINED WITH DEW POINTS IN THE LOWER TO MID 70S WILL CREATE HEAT INDEX VALUES FROM 100 TO 105 DEGREES THIS AFTERNOON ACROSS MUCH OF THE EAST TENNESSEE AND THE LOWER ELEVATIONS OF EXTREME SOUTHWEST NORTH CAROLINA. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO PROVIDE SOME RELIEF FROM THE HEAT LATER THIS AFTERNOON FOR SOME LOCATIONS. WHEN TEMPERATURES AND HUMIDITY COMBINE TO PRODUCE VERY HIGH HEAT INDICES...THIS HEAT CAN LEAD TO A VARIETY OF SERIOUS HEALTH PROBLEMS...SUCH AS SUNSTROKE...HEAT CRAMPS...AND HEAT EXHAUSTION WITH PROLONGED EXPOSURE OR PHYSICAL ACTIVITY. IF YOU MUST BE OUTSIDE DURING THE AFTERNOON HOURS...IT IS BEST TO TAKE FREQUENT BREAKS AND DRINK PLENTY OF WATER. IN ADDITION...WEAR LIGHT COLORED CLOTHES AND AVOID TOO MUCH SUN EXPOSURE. && FOR ADDITIONAL INFORMATION ON HEAT SAFETY TIPS...PLEASE VISIT THE NATIONAL WEATHER SERVICE'S MORRISTOWN WEBSITE AT WWW.WEATHER.GOV/MORRISTOWN/ OR WWW.SRH.NOAA.GOV/MRX/. TD
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 121 PM EDT MON JUL 26 2010 TNZ081>083-099-261800- BLEDSOE TN-HAMILTON TN-RHEA TN-SEQUATCHIE TN- 1221 PM CDT MON JUL 26 2010 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN HAMILTON...SEQUATCHIE... BLEDSOE AND RHEA COUNTIES UNTIL 100 PM CDT/200 PM EDT/... AT 1215 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7 MILES NORTHEAST OF DUNLAP...MOVING EAST AT 5 MPH. OTHER THUNDERSTORMS IN THE AREA MAY BECOME STRONG AS WELL. 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 AND FREQUENT DANGEROUS LIGHTNING. THIS STORM WILL BE NEAR... BRAYTON AROUND 100 PM CDT. TD
The Northeast Alabama radar (KHTX), 72 km away, was scanning. The volume nearest the first event began at 17:58 UTC.
10 thunderstorm wind. Local standard time, as filed.
Several trees were reported down along Old Highway 28 and West Valley Road.
A few trees were reported down near Rockwood.
Several trees were reported down in the vicinity of Sale Creek.
Four or five trees were reported down in the central portion of the county.
A few trees were reported down on Lead Mine Road.
One tree was reported down on Old Lee Highway and another had fallen on Garner Road.
One tree was reported down in Jasper.
One tree and several power lines were reported down in Cleveland causing power outages.
One tree was reported down on Highway 30.
A few trees were reported down in the Boogertown area near Oldham Creek Road.
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: 238568, 238562, 238558, 238559, 238557, 238561, 238563, 238556, 238565, 238566.