Alert archive / Tennessee / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 12, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at May 8, 2004, 5:18 PM EDT for Unicoi County, Tennessee. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 8, 2004, 5:18 PM EDT (21:18 UTC)
- Expired
- May 8, 2004, 6:00 PM EDT
- In force
- 42 min
- Issued by
- NWS Morristown, TN
- Area
- Counties, with a storm outline in the text
County Unicoi County, TN
The radar
The Knoxville radar (KMRX), 87 km from the middle of the area, began a volume at 21:18 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.3 hours before the alert went out and 228 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 32 J/kg
- Mixed-layer CIN
- -462 J/kg
- Mixed-layer LCL
- 1254 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -66 m²/s²
- 0-3 km storm-relative helicity
- -49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KMRX 082118 SVRMRX TNC171-082200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MORRISTOWN TN 518 PM EDT SAT MAY 8 2004 THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... UNICOI COUNTY IN EAST TENNESSEE * UNTIL 600 PM EDT * AT 513 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR ERNESTVILLE...OR 7 MILES SOUTH OF ERWIN. THE STORM WAS NEARLY STATIONARY. * THE SEVERE THUNDERSTORM WILL BE NEAR... BANNER HILL AROUND 600 PM EDT THE SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING... WINDS UP TO 60 MPH...WHICH COULD PUSH OVER SHALLOW ROOTED TREES AND BREAK TREE LIMBS ABOUT THE SIZE OF YOUR WRIST. HAIL UP TO 1 INCH IN DIAMETER...OR THE SIZE OF QUARTERS. VERY HEAVY RAINFALL WHICH MAY CAUSE LOCALIZED FLOODING. FREQUENT AND DEADLY CLOUD-TO-GROUND LIGHTNING. SEEK A STURDY SHELTER IMMEDIATELY LAT...LON 3606 8259 3592 8255 3608 8220 3620 8226 $$ DH
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at May 8, 3:18 PM EDT, 2 hours earlier.
Area forecast discussion, May 8, 3:18 PM EDT, 2 hours before
.SHORT TERM (TONIGHT THROUGH MONDAY NIGHT)...WIND SHIFT AND DP BOUNDARY WILL CONTINUE ALONG OR JUST EAST OF NC/TN STATE LINE THROUGH SUNDAY. THIS WILL ALLOW FOR SOME LOW LEVEL MOISTURE CONVERGENCE THAT WILL BE ENHANCED BY AFTN OROGRAPHIC LIFT SO ISOLD AFTN/EVE TSTMS REMAIN POSSIBLE. OTHERWISE TEMPS REMAIN ABOVE NORMAL FAVORING COOLER NGM MINS AND COOLER MAV MAXS. RIDGE ALOFT WEAKENS SOME AS WEAK UPR TROUGH DRIFTS NE REMAINING ON WEST SIDE OF MS RVR THROUGH MON. THIS WILL INCREASE CLOUDS SOME AS LAYER MOISTENS IN SW FLOW. TRIGGERS LACKING MONDAY SO LOW CONFIDENCE IN SLGT CHC POPS FOR CUMBERLAND PLATEAU AND MNTS. .LONG TERM (TUESDAY THROUGH SATURDAY)...GFS CONTINUING TO ADVERTISE WEAK SHORTWAVES ROTATING THROUGH THE REGION INTO THURSDAY...ALONG WITH DECENT INSTABILITY. MOISTURE HAS INCREASED A BIT FROM EARLIER RUNS...BUT STILL THINKING IT WILL BE DIURNAL ACTIVITY AND WILL KEEP ONLY SLIGHT CHANCE POPS INTO THURSDAY. WELL DEFINED COLD FRONT STILL APPROACHING ON LATE FRIDAY...BRINGING DEEPER MOISTURE WITH IT. WILL KEEP 30 POPS ON LATE FRIDAY...AND FRIDAY NIGHT. FRONT PASSES CWA ON SATURDAY...BEST CHANCES WILL BE SATURDAY MORNING...BUT STILL SOME ISOLATED ACTIVITY IN THE AFTERNOON AS THE UPPER TROUGH PASSES. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA, TN 61 88 61 85 / 0 0 10 10 KNOXVILLE, TN 62 87 61 84 / 10 0 10 10 BRISTOL, TN 56 85 55 84 / 10 0 10 10 OAK RIDGE, TN 60 86 60 83 / 10 0 10 10 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && SON/GH
Hazardous weather outlook, May 8, 4:55 AM EDT, 12 hours 23 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 455 AM EDT SAT MAY 8 2004 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-005- 006-008-090900- ANDERSON-BLEDSOE-BLOUNT SMOKY MTN-BRADLEY-CAMPBELL-CHEROKEE- CLAIBORNE-CLAY-COCKE SMOKY MTN-EAST POLK-GRAINGER-HAMBLEN-HAMILTON- HANCOCK-HAWKINS-JEFFERSON-JOHNSON-KNOX-LEE-LOUDON-MARION-MCMINN- MEIGS-MORGAN-NORTH SEVIER-NORTHWEST CARTER-NORTHWEST COCKE- NORTHWEST GREENE-NORTHWEST MONROE-NW BLOUNT-RHEA-ROANE-RUSSELL- SCOTT TN-SCOTT VA-SEQUATCHIE-SEVIER SMOKY MTN-SOUTHEAST CARTER- SOUTHEAST GREENE-SOUTHEAST MONROE-SULLIVAN-UNICOI-UNION- WASHINGTON TN-WASHINGTON VA-WEST POLK-WISE- 455 AM EDT (355 AM CDT) SAT MAY 8 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST TENNESSEE...SOUTHWESTERN VIRGINIA AND EXTREME SOUTHWESTERN NORTH CAROLINA. .DAY ONE (TODAY AND TONIGHT)... HIGH PRESSURE WILL PERSIST ACROSS THE REGION AND PROVIDE WARM TEMPERATURES...AND MAINLY DRY WEATHER. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN (SUNDAY THROUGH FRIDAY)... THE AREA OF HIGH PRESSURE WILL WEAKEN ALONG WITH A SLIGHT INCREASE IN MOISTURE...LEADING TO AT LEAST A SLIGHT CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS. THE BEST CHANCES FOR SIGNIFICANT RAINS MAY OCCUR ON THURSDAY NIGHT INTO FRIDAY. HOWEVER...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. PLEASE STAY TUNED TO NOAA WEATHER RADIO OR VISIT OUR WEBSITE AT WWW.SRH.NOAA.GOV/MRX. TG
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 6:09 PM EDT | Severe Thunderstorm Warning | MRX | Carter | 51 min |
| May 8, 6:26 PM EDT | Severe Thunderstorm Warning | MRX | Johnson | 49 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2004Every severe thunderstorm warning in 2004
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.