A weak boundary lingering across the area triggered isolated severe thunderstorms during the afternoon hours.
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.
A weak boundary lingering across the area triggered isolated severe thunderstorms during the afternoon hours.
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 Jun 25, 9:45 AM EST, 2 hours 27 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 1045 AM EDT FRI JUN 25 2010 .DISCUSSION...FRONTAL BOUNDARY DRAPED ACROSS S PART OF MRX CWA THIS MORNING. SIGNIFICANT PRECIPTABLE WATER GRADIENT STRADDLES THE BOUNDARY WITH VALUES NEAR 2.00 SOUTH OF THE FRONT ... LOWERING TO NEAR 1.00 OVER SW VA TODAY. WEAK STEERING FROM THE WEST TODAY. GOOD DESTABILIZATION EXPECTED THIS AFTN. RAISED POPS ACROSS S PART OF MRX CWA BELIEVING CONVECTION WILL DEVELOP AND MARCH SLOWLY EAST INTO AND ACROSS S CUMBERLAND PLATEAU. SMOKYS SHOULD ALSO SEE DECENT DEVELOPMENT THIS AFTN. SON PREVIOUS DISCUSSION: SHORT TERM...(TODAY AND TONIGHT)...HIGHER DEW POINT TEMPS THIS MORNING WERE NOTED ACROSS SE TN AND SW NC...ALTHO EXACT LOCATION OF COLD FRONT IS UNCERTAIN. CONVECTIVE DEBRIS CLOUDS HAVE THINNED CONSIDERABLY OVERNIGHT...AND STILL EXPECT SOME PATCHY AREAS OF LOW CLOUDS AND DENSE FOG TO DEVELOP BY DAYBREAK. MOST CONVECTION YESTERDAY WAS CENTRAL VALLEY AND SMOKIES NORTHWARD...SO INCLUDED SOME EARLY MORNING FOG FOR THOSE AREAS. PREVIOUS FORECAST GRIDS GENERALLY LOOKED GOOD FOR TODAY...WITH NO POPS EXTREME NRN PARTS OF SW VA TO CHANCE ACROSS SE TN AND SW NC. I DID LOWER POPS SOME FOR EARLY TODAY...THEN AREAL QUALIFIER FOR THE AFTERNOON HOURS. AN ISOLATED STRONG TO SEVERE STORM POSSIBLE THIS AFTERNOON. SPOTTY WEAKENING CONVECTION THIS EVENING THEN CLEARING WITH AREAS OF FOG POSSIBLE. STAYED CLOSE TO PERSISTENCE FOR HIGHS OR MINUS A DEGREE OR TWO ACROSS NRN AREAS. LOWERED MIN TEMP GRID CLOSER TO A BLEND OF MOS. LONG TERM...(SATURDAY THROUGH THURSDAY)...WEAK BOUNDARY MOVES JUST SOUTH OF THE FORECAST AREA SATURDAY WITH DRIER AIR MASS AND WEAK HIGH PRESSURE BUILDING ACROSS THE FORECAST AREA. KEPT SMALL RAIN CHANCES MOUNTAINS AND SOUTHERN PLATEAU. BOUNDARY DISSIPATES BY SUNDAY WITH MOISTURE LIFTING BACK TO THE NORTH. AT THE SAME TIME A TROPICAL SYSTEM MAY DEVELOP IN THE GULF OF MEXICO. AS MOISTURE SPREADS NORTH RAIN CHANCES INCREASE FROM SOUTH TO NORTH. SUNDAY NIGHT SHOWERS AND THUNDERSTORMS WILL CONTINUE AS COLD FRONT APPROACHES FROM THE NORTH. THIS FRONT WILL SLOWLY MOVE THROUGH MONDAY INTO TUESDAY. HIGHEST POPS MONDAY AND MONDAY NIGHT. TUESDAY THROUGH THURSDAY EXPECT TEMPERATURES A FEW DEGREES COOLER AS MUCH DRIER AIR MASS SETTLES INTO THE SOUTHEAST. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 94 71 95 72 95 / 60 20 10 10 40 KNOXVILLE MCGHEE TYSON AIRPORT, TN 93 69 95 72 94 / 50 20 10 10 30 OAK RIDGE, TN 92 69 95 71 93 / 40 20 10 10 30 TRI CITIES AIRPORT, TN 91 64 92 65 93 / 20 10 10 10 20 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && TG/TD
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 505 AM EDT FRI JUN 25 2010 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-260915- 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- 505 AM EDT FRI JUN 25 2010 /405 AM CDT FRI JUN 25 2010/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. HOWEVER...A WEAKENING FRONTAL BOUNDARY MOVING INTO THE AREA WILL BE A FOCUS FOR A FEW SHOWERS AND THUNDERSTORMS. LOCALLY HEAVY RAINS IN EXCESS OF ONE INCH...AND WIND GUSTS TO 45 MPH COULD OCCUR WITH THE STRONGEST STORMS THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. TG
The Knoxville radar (KMRX), 120 km away, was scanning. The volume nearest the first event began at 17:12 UTC.
4 thunderstorm wind. Local standard time, as filed.
Law enforcement personnel reported 1 tree downed by thunderstorm winds in Marble.
Utility company personnel reported 1 tree and powerlines downed by thunderstorm winds in Hayesville.
The utility company personnel reported 1 tree and powerlines downed by thunderstorm winds in Tusquitee.
The utility company personnel reported 1 tree and powerlines downed by thunderstorm winds in Shooting Creek.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Carolina in 2010Every state in 2010This day in weather historyWarnings in North Carolina, June 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: 230703, 230705, 230708, 230709.