Convection over SW VA dropped a westward and southward moving outflow boundary that allowed produced convection which moved eastward. Some areas experienced training.
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.
Convection over SW VA dropped a westward and southward moving outflow boundary that allowed produced convection which moved eastward. Some areas experienced training.
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 Apr 17, 12:27 PM EST, 18 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 127 PM EDT WED APR 17 2013 .AVIATION...DIURNAL CONVECTION EXPECTED TO DEVELOP OVER THE AREA THIS AFTERNOON. SCT SHOWERS/THUNDERSTORMS SHOULD EFFECT THE AREA BETWEEN 18Z AND 00Z. BEST CHANCE OF THUNDERSTORM ACTIVITY WILL BE IN THE SOUTH NEAR CHA. THUNDERSTORM RISK LOWER AT TRI AND WILL NOT MENTIONED IN TAF THIS AFTERNOON. A SHORT WAVE APPROACHING THE AREA FROM THE NORTH LATE IN THE PERIOD WILL BRING IN A CLOUD DECK BUT ASSOCIATED CONVECTION SHOULD HOLD OFF UNTIL AFTER 18Z. && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && MJB
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 334 AM EDT WED APR 17 2013 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-180745- 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- 334 AM EDT WED APR 17 2013 /234 AM CDT WED APR 17 2013/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT... SCATTERED TO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WILL BE AROUND THE AREA TODAY. A FEW STORMS MAY BECOME RATHER STRONG EVEN EARLY THIS MORNING ACROSS NORTHEAST TENNESSEE WITH MORE DEVELOPMENT EXPECTED DURING THE PEAK HEATING OF THE AFTERNOON. AN ISOLATED STRONG TO MARGINALLY SEVERE STORM IS POSSIBLE...WITH DAMAGING WINDS AND HAIL UP TO 1 INCH DIAMETER THE POTENTIAL THREATS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... A COLD FRONT WILL BRING A LINE OF THUNDERSTORMS ACROSS THE AREA LATE THURSDAY NIGHT THROUGH FRIDAY MORNING. THERE IS A POTENTIAL FOR SOME SEVERE STORMS...WITH DAMAGING WIND GUSTS BEING THE MAIN THREAT. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS UNLIKELY AT THIS TIME.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 1158 AM EDT WED APR 17 2013 TNZ012-171645- SCOTT TN- 1158 AM EDT WED APR 17 2013 ...SIGNIFICANT WEATHER ADVISORY FOR SCOTT COUNTY UNTIL 1245 PM EDT... AT 1153 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 9 MILES WEST OF ONEIDA...MOVING EAST AT 15 MPH. SMALL HAIL AND WIND GUSTS IN EXCESS OF 40 MPH ARE POSSIBLE WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...ONEIDA... HUNTSVILLE...ELGIN...WINFIELD...SLICK ROCK AND KETCHEN. 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.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 1236 PM EDT WED APR 17 2013 TNZ035-171715- MORGAN TN- 1236 PM EDT WED APR 17 2013 ...SIGNIFICANT WEATHER ADVISORY FOR MORGAN COUNTY UNTIL 115 PM... AT 1231 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A CLUSTER OF STRONG THUNDERSTORMS ALONG THE MORGAN AND FENTRESS COUNTY LINE...WHICH WERE MOVING SOUTHEAST AT 15 MPH. SMALL HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE STORMS. 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. DMG
The Knoxville radar (KMRX), 121 km away, was scanning. The volume nearest the first event began at 17:46 UTC.
2 hail, 2 thunderstorm wind, 1 flash flood. Local standard time, as filed.
Emergency manager personnel reported thunderstorms produced golfball-size hail 5 miles south of Deer Lodge along with reports of roof damage.
CoCoRaHS reported thunderstorms produced half dollar size hail 10 miles west of Melvine |along with shredded leaves and damaged shingles.
Law enforcement personnel reported a couple of trees were downed by thunderstorm wind in Spring City.
Several roads closed or partially washed out. Portions of Big Springs Gap Rd...Beaver Hill Rd...and Upper East Valley Rd. One swift water rescue where a vehicle was washed off a bridge.
Emergency management personnel reported several trees were downed by thunderstorm wind in Pikeville and surrounding areas.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2013Every state in 2013This day in weather historyWarnings in Tennessee, April 2013
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: 439472, 439471, 439480, 436643, 439481.