Alert archive / Tennessee / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 146, NWS Morristown, TN

July 28, 2000Johnson County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 28, 2000, 5:46 PM EDT for Johnson County, Tennessee. It was in force for 44 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: Jul 28, 2000, 5:46 PM EDT (21:46 UTC)
Expired: Jul 28, 2000, 6:30 PM EDT
In force: 44 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 21:48 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
Jul 28, 6:10 PM EDT	Hail 1.75	Mountain City, 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 nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.8 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: 249 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 1228 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: -11 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.

528 
WUUS54 KMRX 282147
SVRMRX
TNC091-163-VAC520-282230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
546 PM EDT FRI JUL 28 2000

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JOHNSON COUNTY IN EASTERN TENNESSEE
  SULLIVAN COUNTY IN EASTERN TENNESSEE
  CITY OF BRISTOL IN SOUTHWEST VIRGINIA

* UNTIL 630 PM EDT

* AT 543 PM EDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM 5 MILES
  SOUTHEAST OF SOUTH HOLSTON DAM...OR 12 MILES SOUTHEAST OF BRISTOL
  TN...MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  10 MILES NORTHWEST OF NEVA AROUND 555 PM EDT
  SHADY VALLEY AROUND 600 PM EDT
  HARR AROUND 605 PM EDT
  9 MILES NORTHWEST OF MOUNTAIN CITY AROUND 610 PM EDT
  7 MILES WEST OF LAUREL BLOOMERY AROUND 615 PM EDT

THE SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING...
  WINDS UP TO 60 MPH...WHICH COULD PUSH OVER SHALLOW ROOTED TREES AND
  BREAK LIMBS OFF OF TREES ABOUT THE SIZE OF YOUR WRIST.
  DAMAGING HAIL UP TO 1 3/4 INCH IN DIAMETER...OR THE SIZE OF
  GOLFBALLS.
  VERY HEAVY RAINFALL WHICH MAY CAUSE LOCALIZED FLOODING.

AVOID USING THE TELEPHONE OR OTHER ELECTRICAL EQUIPMENT WHILE
LIGHTNING IS IN THE AREA.

$$

LAT...LON 3661 8167 3660 8260 3653 8260 3648 8263
          3646 8269 3643 8260 3644 8242 3640 8228
          3643 8213 3650 8197 3638 8203 3628 8194
          3635 8176

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 Jul 28, 3:08 PM EDT, 2 hours 38 minutes earlier.

Area forecast discussion, Jul 28, 3:08 PM EDT, 2 hours 38 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
308 PM EDT FRI JUL 28 2000

UPPER LOW OVER GREAT LAKES SHARPENS AND BECOMES MORE SOUTHWEST-
NORTHEAST ORIENTED THIS WEEKEND...STRETCHING FROM THE GREAT LAKES
INTO THE SOUTHERN MISSISSIPPI VALLEY. THIS IN TURN HELPS DEEPEN THE
SOUTHWEST FLOW OF GULF MOISTURE AHEAD OF IT OVER THE TENNESSEE
VALLEY AND SOUTHERN APPALACHIANS. AT THE SURFACE...A COUPLE OF WEAK
FRONTS/TROFS SWING AROUND THE BASE OF THE UPPER TROF AND WASH OUT
AS THEY APPROACH THE SOUTHERN APPALACHIANS AND BECOME ALIGNED UNDER
UPPER FLOW. MUGGY AIRMASS AND FRONTS/TROUGHS AS WELL AS OUTFLOW
BOUNDARIES WILL BE MAIN TRIGGERS FOR SHOWERS AND THUNDERTORMS
THROUGH THE WEEKEND.

TEMPS A FAN/FWC BLEND.

CHA   68  92  68  88 /  40  40  20  40
TYS   67  88  67  86 /  50  40  20  40
TRI   63  85  63  83 /  50  40  20  40
OQT   67  88  67  86 /  50  40  20  40

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

AUSTIN

In the hours before

Local storm report, Jul 28, 4:24 PM EDT, 1 hour 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
424 PM EDT FRI JUL 28 2000

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ...COUNTY LOCATION....

0350 PM                              TN   0.75 INCH HAIL
07/28/00   GRAINGER                       REPORTED BY SPOTTER

0140 PM    SOUTH OF ONEIDA           TN   0.75 INCH HAIL
07/28/00   SCOTT                          REPORTED BY PUBLIC

0320 PM    POWELL VALLEY             TN   1.00 INCH HAIL
07/28/00   CLAIBORNE                      REPORTED BY DISPATCH

0205 PM    SPRING CITY               TN   WIND DAMAGE
07/28/00   RHEA                           TREES DOWN
					  REPORTED BY DISPATCH
                                          NORTH OF SPRING CITY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 1:30 PM EDT	Severe Thunderstorm Warning	MRX	Scott	30 min
Jul 28, 3:13 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne	47 min
Jul 28, 3:25 PM EDT	Severe Thunderstorm Warning	MRX	Grainger	35 min
Jul 28, 3:59 PM EDT	Severe Thunderstorm Warning	MRX	Monroe	31 min
Jul 28, 4:24 PM EDT	Severe Thunderstorm Warning	MRX	Greene	36 min
Jul 28, 4:28 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton	32 min
Jul 28, 5:00 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Sullivan, Washington	45 min
Jul 28, 5:19 PM EDT	Severe Thunderstorm Warning	MRX	Carter	41 min
Jul 28, 5:19 PM EDT	Severe Thunderstorm Warning	MRX	Marion, Sequatchie	26 min
Jul 28, 5:40 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Sevier	35 min
Jul 28, 5:46 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan	44 min
Jul 28, 6:14 PM EDT	Severe Thunderstorm Warning	MRX	Sevier	46 min
Jul 28, 7:30 PM EDT	Severe Thunderstorm Warning	MRX	Meigs, Rhea	30 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2000 Every severe thunderstorm warning in 2000

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.