An upper level trough triggered isolated severe thunderstorms over southeast Tennessee during the afternoon hours. Storm reports were for damaging thunderstorm winds.
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.
An upper level trough triggered isolated severe thunderstorms over southeast Tennessee during the afternoon hours. Storm reports were for damaging thunderstorm winds.
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 21, 2:10 PM EST, 1 hour 25 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 310 PM EDT SAT JUN 21 2008 .SHORT TERM (TONIGHT THROUGH MONDAY NIGHT)...AIRMASS REMAINED STABLE FOR MOST OF THE DAY. GOOD SUNSHINE HAS LED TO LATE DAY DESTABILIZATION. CONVECTIVE DEVELOP SHOULD COMMENCE ACROSS THE AREA LATE THIS AFTN. FRONTAL BOUNDARY SETS UP SE OF AREA WITH WEAK SURFACE HIGH PRESSURE NOSING IN FROM THE NORTH. UPPER TROUGH BECOMES ESTABLISHED JUST WEST OF AREA THEN DRIFTS INTO SOUTHERN APPALACHIANS BY MONDAY NIGHT. BEST PCPN CHC AFTER THIS EVENING WILL BE MONDAY AFTN. TEMPS NEAR NORMAL. .LONG TERM (TUESDAY THROUGH SATURDAY)...HIGH PRESSURE BUILDS INTO THE AREA ON TUESDAY BRINGING DRY WEATHER FOR TUESDAY AND TUESDAY NIGHT. A SERIES OF SHORTWAVES TRACK THROUGH THE REGION FOR THE REMAINDER OF THE PERIOD. DEEP MOISTURE IS LIMITED...BUT SOME INSTABILITY IS ALSO EXPECTED EACH DAY...SO WILL KEEP SLIGHT CHANCE POPS FOR WEDNESDAY THROUGH SATURDAY. STAYED NEAR MEX/HPC GUIDANCE FOR TEMPERATURES. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 64 87 62 86 59 / 20 10 10 20 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 61 84 61 83 59 / 20 10 10 30 10 OAK RIDGE, TN 60 84 60 83 58 / 20 10 20 30 10 TRI CITIES AIRPORT, TN 60 82 56 81 55 / 40 20 20 30 10 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && SON/GH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 447 AM EDT SAT JUN 21 2008 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-220900- 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- 447 AM EDT SAT JUN 21 2008 /347 AM CDT SAT JUN 21 2008/ 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. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED...BUT NO SEVERE STORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. TG
The Northeast Alabama radar (KHTX), 71 km away, was scanning. The volume nearest the first event began at 20:32 UTC.
2 thunderstorm wind. Local standard time, as filed.
Fire department reported a tree downed by thunderstorm winds on Signal Mountain.
Power company reported several powerlines downed by thunderstorm winds near Harrison.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2008Every state in 2008This day in weather historyWarnings in Tennessee, June 2008
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: 111465, 111468.