Alert archive / Tennessee / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 79, NWS Morristown, TN

June 2, 2002Johnson County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 2, 2002, 4:01 PM EDT for Johnson County, Tennessee. It was in force for 29 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 2, 2002, 4:01 PM EDT (20:01 UTC)
Expired: Jun 2, 2002, 4:30 PM EDT
In force: 29 min
Issued by: NWS Morristown, TN
Area: Whole counties

County Johnson County, TN

The radar

The Knoxville radar (KMRX), 142 km from the middle of the area, began a volume at 20:02 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.

What was reported inside it

Time	Report	Where	Remark
Jun 2, 4:15 PM EDT	Thunderstorm Wind	Central Portion, TN

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 2, 2:15 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.0 hours before the alert went out and 180 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: 1151 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 1137 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 177 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

043 
WUUS54 KMRX 022001
SVRMRX
TNC091-022030-
/NEW.KMRX.SV.W.0107.022001-022030/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
401 PM EDT SUN JUN 2 2002

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

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

* UNTIL 430 PM EDT

* AT 357 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR SHADY VALLEY...OR 9 MILES NORTHWEST OF
  MOUNTAIN CITY...MOVING SOUTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MOUNTAIN CITY AROUND 415 PM EDT
  6 MILES NORTH OF TRADE AROUND 430 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.

STAY AWAY FROM WINDOWS. $$

LAT...LON 3668 8192 3653 8206 3620 8159 3639 8140

TG

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 Jun 2, 2:49 PM EDT, 1 hour 12 minutes earlier.

Area forecast discussion, Jun 2, 2:49 PM EDT, 1 hour 12 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
129 PM EDT SUN JUN 2 2002

FIRST SHORT-TERM...STATIONARY FRONT EXISTS ACROSS FROM SOUTHWEST
INDIANA TO EASTERN KENTUCKY WITH THETA-E RIDGE AXIS AND INSTABILITY
GRADIENT OVER KENTUCKY AND OVER NORTHEAST HALF OF FORECAST AREA.
SEVERE THUNDERSTORMS OVER EAST KENTUCKY IS EXPECTED TO BUILD SLOWLY
EAST AND SOUTH INTO SOUTHWEST VIRGINIA AND NORTHEAST TENNESSEE...
SPCS SEVERE THUNDERSTORM WATCH. WILL CALL FOR HIGH EVENING POPS
THERE. MODELS SHOW ACTIVITY DECREASING RAPIDLY BEFORE MIDNIGHT.

FRONT IS PROGGED TO LIFT NORTHEAST MONDAY WITH WARMING THICKNESS...
SO WILL CALL FOR RETURN OF MAINLY DRY CONDITIONS WITH HOT...HAZY
AND HUMID CONDTIONS. SOME ISOLATED TO WIDELY SCATTERED TERRAIN
DRIVEN CONVECTION POSSIBLE.

FOR TUESDAY...SURFACE RIDGE PULLS EAST ALLOWING DEEPER MOISTURE TO
RETURN. MODELS SHOW MORE DIURNAL CONVECTION WITH BEST CHANCES OVER
THE TERRAIN AND SOUTHERN FORECAST AREA.

IN THE EXTENDED...WENT ABOVE GUIDANCE TEMPS AND DRIER FOR THIS
WEEKEND...BUT LATER SHIFTS MAY NEED TO DROP POPS FOR FRIDAY AS WELL.
NEW AVN SUGGESTS A MORE PROGRESSIVE FRONT AND UPPER TROUGH WITH
FROPA LATE THURSDAY.

FCSTID =
CHA   69  95  70  91 /  10  10  10  40
TYS   68  92  69  90 /  20  10  10  30
TRI   64  88  64  89 /  40  30  20  30
OQT   68  92  69  90 /  20  10  10  30

.MRX...
NC...NONE.
TN...NONE.
VA...NONE.

DH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 2, 3:42 PM EDT	Severe Thunderstorm Warning	MRX	Hawkins, Sullivan	48 min
Jun 2, 4:28 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan	32 min
Jun 2, 4:57 PM EDT	Severe Thunderstorm Warning	MRX	Johnson	33 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.