Thunderstorm Wind, Anderson
- When
- August 4, 6:45 PM EST
- Where
- Anderson County, 3 mi N of Clinton
- Measured
- 60 kt (69 mph) estimated gust
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 36.167, -84.133
Damaging Wind in Tennessee, August 4, 2003
Several trees reported down by 911 dispatch.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
What happened
The episode as NWS MRX wrote it up.
Several trees reported down by 911 dispatch.
What forecasters said that day
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 Aug 4, 6:40 PM EST, 5 minutes earlier.
Area forecast discussion, Aug 4, 6:40 PM EST, 5 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 740 PM EDT MON AUG 04 2003 THE FOLLOWING ARE ALL THE FORECAST DISCUSSIONS FROM THE PAST 24 HOURS...WITH THE MOST RECENT ON TOP. THIS PROVIDES A HISTORY OF THE DEVELOPMENT OF THE CURRENT FORECAST. ********************************************************************* EVENING FORECAST DISCUSSION UPDATE 740 PM EDT MON AUG 04 2003 UPDATE ISSUED TO ADD SEVERE THUNDERSTORM WATCH 838 TO FORECAST. EXPECT CLUSTER OVER KNOX AND ANDERSON COUNTIES TO PERSIST AND MOVE EAST...POSSIBLY PRODUCING ADDITIONAL SEVERE WEATHER AS IT MOVES ALONG. ADDITIONAL STORM MOVING NORTHEAST ACROSS NORTHEAST TN MAY ALSO POSE ADDITIONAL SEVERE WEATHER THREAT THROUGH 9 PM OR SO. NO OTHER CHANGES TO FORECAST AT THIS TIME. WILL BEGIN TO REMOVE COUNTIES ON WESTERN EDGE OF WATCH AS OF 9 PM IF CONDITIONS WARRANT. .MRX... NC...NONE. TN...NONE. VA...NONE. SP ********************************************************************* AFTERNOON FORECAST DISCUSSION 330 PM EDT MON AUG 04 2003 TONIGHT AND TUESDAY...CHALLENGING FORECAST EVEN WITH RECENT PATTERNS OF HEAVY RAIN AND CONVECTION. DRY SLOT IN WATER VAPOR APPROACHING AREA FROM WEST, BUT ITS A REAL NARROW DRY SLOT. ALL IT REALLY DOES IS MAKE ONE THINK THAT DRYING ALOFT WILL ADD TO OUR ALREADY UNSTABLE CONDITIONS AND CREATE THE CHANCE FOR BORDERLINE SEVERE THUNDERSTORMS ON TOP OF HEAVY RAIN SHOWERS. AMPLE SUNSHINE IN VALLEY IS PRODUCING CLOUDS AND THIS PROCESS WILL CONTINUE. EXPECT SCATTERED THUNDERSTORMS ACROSS MOST OF AREA TONIGHT AS PIECES OF MID TO UPPER VORTS SKIP ACROSS REGION. LOWER LAYERS ARE ALREADY FILLED WITH SFC OUTFLOW BOUNDARIES AND HIGH DEWPOINT AIR. THUS WE HAVE MOISTURE, INSTABILITY, AND NOW WE NEED A TRIGGER, WHICH LOOKS LIKE LITTLE VORTS OVER MIDDLE TN. THE VORTS DO LOOK LITTLE THEREFORE EXPECT MORE HEAVY RAIN PRODUCERS THAN DAMAGING WINDS OR LARGE HAIL. KEEPING LOWS INTACT WITH PREVIOUS PACKAGE EXCEPT IN NE PART OF FORECAST AREA, WHERE I INCREASED THEM A DEGREE OR TWO. AVN MORE WET THAN MESO ETA TOMORROW, AND WILL GO WITH A COMP ON POPS LEANING MORE TOWARD AVN. LOOKS LIKE WEAK SFC TROF FROM OH VALLEY LOW DRAGS ACROSS AREA BETWEEN ABOUT 06Z AND 18Z WHICH KEEPS A CHANCE TSTMS IN FOR TUESDAY. SEE NO REASON TO CHANGE HIGHS FOR TUESDAY. IN THE EXTENDED...UPPER LOW CONTINUES TO BRING CHANCE POPS WEDNESDAY AND THURSDAY. A LITTLE DRIER RH INDICATED...WILL ONLY KEEP CHANCE POPS FOR THE MOUNTAINS ON FRI-SUN AND 20 POPS ELSEWHERE. ALSO THINK BEST CHANCES WILL BE DIURNAL. WILL ADD SLIGHT CHANCE POPS FOR MONDAY...BUT MOISTURE LIMITED. CHA 69 87 69 87 / 50 50 50 50 TYS 67 86 67 85 / 50 40 50 40 TRI 64 83 63 83 / 50 40 40 30 OQT 66 85 67 85 / 50 40 50 40 BB/GH ********************************************************************* EARLY MORNING FORECAST DISCUSSION 945 AM EDT MON AUG 4 2003 NO UPDATE FOR FOLLOWING REASONS: VERY RECENT SPATE OF CONVECTION HAS LEFT NUMEROUS INTERSECTING OUTFLOW BOUNDARIES ON GROUND. SEEMINGLY BENIGN SKY CONDITIONS BETWEEN CLOUDY AREAS IS ALLOWING JUST TONS OF INSOLATION IN WHICH WILL RAISE TEMPS TO CONVECTIVE LEVELS THIS AFTERNOON. MESO ETA SOUNDINGS INDICATE FORECAST CAPES FROM AROUND 1500 IN NORTHEAST PARTS TO AROUND 3000 ALONG GA LINE. COMBINED WITH TOPOGRAPHICALLY INDUCED CONVECTIVE INITIATION, BELIEVE THAT CURRENT PACKAGE WITH HIGH CHANCE TO LIKELY POPS WILL OUT. PLACES WITH HIGH CHANCE (50%) SEEM A LITTLE UNDERDONE WITH FLOOD WATCH IN PLACE, BUT...AS THE LATEST FLOOD STATEMENT (MEMFLSMRX) SAYS, IT MAY NOT RAIN IN EVERY SPOT, BUT WHERE IT DOES RAIN, IT WILL RAIN HARD. KEEPING FLOOD WATCH IN EFFECT BECAUSE OF NUMEROUS REPORTS OF STANDING WATER, BANKFULL CREEKS, AND FILLED SINKHOLES. ANY ADDITIONAL RAIN WILL CAUSE IMMEDIATE FLOODING IN THOSE PLACES. KEEPING ANY EYE OUT FOR BORDERLINE SEVERE TSTMS THIS AFTERNOON, TOO. BB
Hazardous weather outlook, Aug 4, 3:50 AM EST, 14 hours 55 minutes before
NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-005- 006-008-042200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 450 AM EDT MON AUG 4 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWESTERN VIRGINIA...EAST TENNESSEE AND SOUTHWESTERN NORTH CAROLINA. .DAY ONE (TODAY AND TONIGHT)... THE AIRMASS ACROSS THE TENNESSEE VALLEY AND SOUTHERN APPALACHIANS WILL REMAIN MOIST AND UNSTABLE. DAYTIME HEATING WILL COMBINE WITH OCCASIONAL UPPER LEVEL DISTURBANCES TO CAUSE SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS AT TIMES. HAZARDOUS WEATHER IS POSSIBLE AT THIS TIME...AS A FEW STORMS MAY REACH STRONG TO SEVERE LEVELS. THE MAIN THREATS WILL BE DAMAGING STRAIGHT LINE WINDS UP TO 50 MPH...AND POSSIBLY HAIL OF DIME SIZE OR SLIGHTLY LARGER. HOWEVER...THE GREATEST HAZARD WILL BE LOCALLY HEAVY RAINS OF 2 TO 3 INCHES WHICH MAY CAUSE FLASH FLOODING. FOR ADDITIONAL DETAILS ON THE FLOOD THREAT...SEE THE FLOOD WATCH STATEMENT ISSUED EARLIER TODAY. .DAYS TWO THROUGH SEVEN (TUESDAY THROUGH SUNDAY)... THE LOW PRESSURE SYSTEM TO OUR NORTH OVER THE GREAT LAKES REGION WILL KEEP THE CHANCES OF SHOWERS AND THUNDERSTORMS HIGH INTO TUESDAY. THIS AREA OF LOW PRESSURE WILL MOVE EAST OF THE REGION BY TUESDAY NIGHT...AND ALLOW RAIN CHANCES TO DECREASE TO MORE TYPICAL SUMMER VALUES FOR MID WEEK. HAZARDOUS WEATHER WILL BE POSSIBLE AGAIN ON TUESDAY...WITH THE MAIN THREATS BEING LOCALIZED FLOODING...DAMAGING WINDS AND POSSIBLY LARGE HAIL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED IN A FEW AREAS TODAY THROUGH TUESDAY...AND PERSONS LIVING IN FLOOD PRONE AREAS SHOULD REMAIN ALERT FOR POSSIBLE FLOOD OR FLASH FLOOD WARNINGS. STAY TUNED OR VISIT OUR WEBSITE AT WWW.SRH.NOAA.GOV/MRX. TG
In the hours before
Local storm report, Aug 4, 5:09 PM EST, 1 hour 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
609 PM EDT MON AUG 04 2003
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0540 PM TN WIND DAMAGE
08/04/03 HAMILTON A FEW TREES DOWN OFF
COOLEY ROAD. REPORTED BY
HAMILTON COUNTY 911.
0600 PM TN 0.75 IN HAIL
08/04/03 CAMPBELL DIME SIZE HAIL ON I-75.
REPORTED BY THP.
0545 PM COSBY TN 1.00 IN HAIL
08/04/03 COCKE QUARTER SIZE HAIL IN
COSBY. 1.10 INCHES OF
RAIN IN LESS THAN 1 HOUR.
REPORTED BY LOCAL
SPOTTER.Local storm report, Aug 4, 5:44 PM EST, 1 hour 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
644 PM EDT MON AUG 04 2003
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0633 PM TN WIND DAMAGE
08/04/03 RHEA TREES DOWN IN WESTERN
PORTION OF COUNTY.
REPORTED BY RHEA
SHERIFFS OFFICE.
0635 PM TEN MILE TN 0.75 IN HAIL
08/04/03 MEIGS 3/4 INCH HAIL IN THE TEN
MILE AREA. REPORTED BY
MEIGS COUNTY 911.Local storm report, Aug 4, 6:42 PM EST, 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
742 PM EDT MON AUG 04 2003
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0630 PM TN WIND DAMAGE
08/04/03 COCKE TREES DOWN ON HARTFORD
ROAD AND IN COSBY.
REPORTED BY COCKE
SHERIFFS OFFICE.
0700 PM CLINTON TN 1.00 IN HAIL
08/04/03 ANDERSON 1 INCH HAIL IN THE
CLINTON AREA. REPORTED
BY AN OFF DUTY NWS
EMPLOYEE.
0730 PM TN WIND DAMAGE
08/04/03 KNOX NUMEROUS TREES DOWN
ACROSS THE NORTHWEST
PORTION OF THE COUNTY.
REPORTED BY KNOX COUNTY
911.The radar
The Knoxville radar (KMRX), 66 km away, was scanning. The volume nearest the first event began at 23:45 UTC.
Event by event
1 thunderstorm wind. Local standard time, as filed.
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flooding and Lightning Strikes in Ohio, August 4, 2003
- Flash Flood and Hail in Tennessee, August 4 to 5, 2003
- Flash Flood and Hail in Kentucky, August 4, 2003
- Flash Flood and Flood in Ohio, August 4, 2003
- Tornado and Hail in Virginia, August 4 to 5, 2003
- Flash Flooding in New York, August 4, 2003
- Flash Flood in Kentucky, August 4, 2003
- Damaging Wind and Lightning Strike in South Carolina, August 4, 2003
- Flash Flood and Damaging Winds in Mississippi, August 4, 2003
- Flood in Ohio, August 4, 2003
- Flood in Ohio, August 4, 2003
- Damaging Winds in Texas, August 4, 2003
More
Every storm in Tennessee in 2003Every state in 2003This day in weather historyWarnings in Tennessee, August 2003
Sources
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: 5378287.