A boundary lingered across east Tennessee triggering isolated thunderstorms. A few of the storms downed a few trees and produced flash flooding.
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 boundary lingered across east Tennessee triggering isolated thunderstorms. A few of the storms downed a few trees and produced flash flooding.
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 2, 2:28 PM EST, 1 hour 52 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 328 PM EDT MON APR 2 2012 .SHORT TERM...(TONIGHT AND TUESDAY)... UPPER LEVEL RIDGE OVER AREA WILL ERODE OVER THE NEXT COUPLE OF DAYS...BUT ENOUGH PERSISTS ON TUESDAY FOR ANOTHER WARM AND HUMID DAY. EXCEPTION WILL BE THE COOLER AND DRY AIR NUDGING IN FROM THE NORTHEAST INTO SW VA. BUT THE SHORT TERM FEATURES ARE FAIRLY UNIMPRESSIVE COMPARED TO THE EXTENDED FORECAST. SCATTERED CONVECTION HAS DEVELOPED OVER THE VALLEY IN AND AROUND MORRISTOWN AS WELL AS NEAR TRICITIES...COULD SEE ADDITIONAL DEVELOPMENT THROUGH EARLY EVENING. SCATTERED CONVECTION AGAIN ON TUESDAY. .LONG TERM (TUESDAY NIGHT THROUGH MONDAY)... A SHORTWAVE TROUGH IN THE NW FLOW WILL BE PASSING OVER THE OHIO VALLEY AND CENTRAL APPALACHIANS ON WEDNESDAY. NAM AND GFS ARE IN GOOD AGREEMENT IN THIS TIME FRAME. PRECIP CHANCES BEGIN RISING TUESDAY NIGHT...PEAKING WEDNESDAY AFTERNOON WITH DIURNAL ENHANCEMENT FROM DAYTIME HEATING. WHILE A FRONT IS EXPECTED TO REMAIN NORTH OF THE AREA...THERE MAY BE SOME ENHANCED CONVERGENCE ACROSS NORTHERN AREAS IN THE AFTERNOON AS IT DRIFTS SOUTH. WILL HAVE LIKELY POPS WEDNESDAY AFTERNOON IN THE NORTH WITH CHANCE POPS SOUTH. A WEAK SHORTWAVE RIDGE ALOFT CROSSES THE AREA WEDNESDAY NIGHT BEFORE A MORE SIGNIFICANT SYSTEM APPROACHES FOR THURSDAY. THE MODELS BEGIN TO DIVERGE SOMEWHAT ON THE TRACK OF THIS SYSTEM...WITH THE GFS SHOWING A SLOWER NW-SE TRACK AND THE NAM SHOWING A FASTER DUE EAST TRACK FROM THE OZARKS ACROSS TN. FAVORABLE JET POSITIONING AND FALLING 500MB HEIGHTS BY BOTH MODELS SUGGEST LIKELY POPS ARE WARRANTED FOR THURSDAY. THE FRONT THAT WAS TO OUR NORTH BEGINS TO PUSH SOUTHWARD INTO THE AREA LATE THURSDAY. WITH THE FRONT IN OUR VICINITY...CHANCE POPS CONTINUE THURSDAY NIGHT...TAPERING OFF THROUGH FRIDAY AS THE UPPER LOW EXITS. COOLER TEMPS CAN BE EXPECTED UNDER DENSE CLOUD COVER FRIDAY...IN THE 60S TO LOWER 70S. A LARGE RIDGE WILL BE CROSSING THE AREA THROUGH THE WEEKEND...GIVING SUNNY SKIES AND A GRADUAL WARMING TREND. THE GFS SHOWS A COLD FRONT PASSAGE ON SUNDAY WITH A BROAD UPPER TROUGH OVER THE EASTERN CONUS...AND THE ECMWF SHOWING A GENERALLY SIMILAR PATTERN BUT A SLOWER FRONT. GFS ENSEMBLE MEMBERS SEEM TO ALL BE SLOWER THAN THE OPERATIONAL GFS AND FAVOR THE ECMWF. THUS WILL LEAN TOWARD THE SLOWER SOLUTION AND HAVE A SLIGHT CHANCE POP MONDAY. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 62 85 60 81 60 / 20 40 30 50 50 KNOXVILLE MCGHEE TYSON AIRPORT, TN 61 82 58 78 57 / 40 30 30 50 50 OAK RIDGE, TN 60 84 58 78 57 / 40 30 30 60 50 TRI CITIES AIRPORT, TN 49 77 54 75 51 / 30 20 30 60 50 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && GC/DGS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 458 AM EDT MON APR 2 2012 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-030900- 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- 458 AM EDT MON APR 2 2012 /358 AM CDT MON APR 2 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT... SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG A FRONTAL BOUNDARY ACROSS NORTHEAST TENNESSEE TODAY. SOME OF THESE STORMS MAY BECOME SEVERE...WITH DAMAGING WINDS AND LARGE HAIL THE PRIMARY THREATS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY... FRONTAL BOUNDARIES WILL LINGER AROUND THE SOUTHERN APPALACHIAN REGION THROUGHOUT MOST OF THE WEEK...WITH SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED TO DEVELOP EACH DAY...ESPECIALLY DURING THE AFTERNOON AND EVENING HOURS. A FEW STORMS MAY BECOME STRONG TO SEVERE EACH DAY...BRINGING THE POSSIBILITY OF DAMAGING WINDS...LARGE HAIL...LOCALLY HEAVY RAINFALL...AND CLOUD TO GROUND LIGHTNING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED ANY AFTERNOON OR EVENING THIS WEEK.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 321 PM EDT MON APR 2 2012 TNZ070-073-074-022000- JEFFERSON TN-NORTH SEVIER TN-SEVIER SMOKY MOUNTAINS TN- 321 PM EDT MON APR 2 2012 ...SIGNIFICANT WEATHER ADVISORY FOR SEVIER AND JEFFERSON COUNTIES UNTIL 400 PM EDT... AT 316 PM EDT...THE PUBLIC REPORTED A STRONG THUNDERSTORM WITH DIME SIZED HAIL NEAR DANDRIDGE...MOVING SOUTH AT 20 MPH. HAIL UP TO THE SIZE OF DIMES OR PENNIES IS EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...DANDRIDGE... SEVIERVILLE...PIEDMONT...CHESTNUT HILL...BIRD CROSSING AND HARRISBURG. 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. DGS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 349 PM EDT MON APR 2 2012 TNZ044-045-022030- UNICOI TN-WASHINGTON TN- 349 PM EDT MON APR 2 2012 ...SIGNIFICANT WEATHER ADVISORY FOR WASHINGTON AND UNICOI COUNTIES UNTIL 430 PM EDT... AT 346 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 8 MILES WEST OF GRAY...OR 11 MILES SOUTH OF KINGSPORT...MOVING SOUTH AT 25 MPH. SMALL HAIL IS EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...ERWIN...BANNER HILL...LEESBURG AND EMBREEVILLE. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. DGS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 405 PM EDT MON APR 2 2012 TNZ073-074-022100- NORTH SEVIER TN-SEVIER SMOKY MOUNTAINS TN- 405 PM EDT MON APR 2 2012 ...SIGNIFICANT WEATHER ADVISORY FOR SEVIER COUNTY UNTIL 500 PM... AT 404 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR SEVIERVILLE...WHICH WAS MOVING SOUTH AT 25 MPH. SMALL HAIL AND GUSTY WINDS ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. IN ADDITION TO SMALL HAIL AND GUSTY WINDS...OCCASIONAL 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
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 458 PM EDT MON APR 2 2012 TNZ069-071>074-022200- BLOUNT SMOKY MOUNTAINS TN-KNOX TN-NORTH SEVIER TN-NW BLOUNT TN-SEVIER SMOKY MOUNTAINS TN- 458 PM EDT MON APR 2 2012 ...SIGNIFICANT WEATHER ADVISORY FOR BLOUNT...SEVIER AND KNOX COUNTIES UNTIL 600 PM... AT 455 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A CLUSTER OF STRONG THUNDERSTORMS NEAR KNOXVILLE AND MARYVILLE...WHICH WERE MOVING SOUTH AT 5 MPH. SMALL HAIL AND GUSTY WINDS ARE EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN. IN ADDITION TO SMALL HAIL...OCCASIONAL 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), 54 km away, was scanning. The volume nearest the first event began at 21:16 UTC.
1 thunderstorm wind, 1 flash flood. Local standard time, as filed.
Broadcast media personnel reported thunderstorm wind downed a few trees near downtown.
Flooding reported which resulted in some road closures and submerged cars near downtown.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2012Every state in 2012This day in weather historyWarnings in Tennessee, April 2012
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: 371673, 373988.