Alert archive / Tennessee / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 14, NWS Morristown, TN

May 8, 2004Johnson County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at May 8, 2004, 6:26 PM EDT for Johnson County, Tennessee. It was in force for 49 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, 6:26 PM EDT (22:26 UTC)
Expired: May 8, 2004, 7:15 PM EDT
In force: 49 min
Issued by: NWS Morristown, TN
Area: Counties, with a storm outline in the text

County Johnson County, TN

The radar

The Roanoke radar (KFCX), 140 km from the middle of the area, began a volume at 22:29 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, 10.4 hours before the alert went out and 172 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

140 
WUUS54 KMRX 082226
SVRMRX
TNC091-082315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
627 PM EDT SAT MAY 8 2004

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JOHNSON COUNTY IN EAST TENNESSEE

* UNTIL 715 PM EDT

* AT 622 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES SOUTH OF LAUREL BLOOMERY...OR 4 MILES
  NORTHEAST OF MOUNTAIN CITY...MOVING NORTHEAST AT 5 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL NORTHEASTERN JOHNSON COUNTY AT 640 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 3653 8190 3639 8176 3655 8145 3674 8164

$$

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, 3 hours 8 minutes earlier.

Area forecast discussion, May 8, 3:18 PM EDT, 3 hours 8 minutes 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, 13 hours 31 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

In the hours before

Local storm report, May 8, 5:48 PM EDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
548 PM EDT SAT MAY 08 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0540 PM     HAIL             1 S BANNER HILL         36.11N 82.41W
05/08/2004  0.75 INCH        UNICOI             TN   LAW ENFORCEMENT

            DIME SIZE HAIL NEAR BANNER HILL. REPORTED BY SHERIFFS
            OFFICE.

&&

MEP

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 8, 5:18 PM EDT	Severe Thunderstorm Warning	MRX	Unicoi	42 min
May 8, 6:09 PM EDT	Severe Thunderstorm Warning	MRX	Carter	51 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2004 Every 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.