Alert archive / Tennessee / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 87, NWS Morristown, TN

June 26, 2001Greene County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 26, 2001, 12:42 PM EDT for Greene County, Tennessee. It was in force for 48 min. 3 reports 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 26, 2001, 12:42 PM EDT (16:42 UTC)
Expired: Jun 26, 2001, 1:30 PM EDT
In force: 48 min
Issued by: NWS Morristown, TN
Area: Whole counties

County Greene County, TN

The radar

The Knoxville radar (KMRX), 50 km from the middle of the area, began a volume at 16:42 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 26, 12:45 PM EDT	Thunderstorm Wind	Caney Branch, TN	Trees down on Poplar Springs Road.
Jun 26, 1:00 PM EDT	Hail 1	Mohawk, TN
Jun 26, 1:05 PM EDT	Thunderstorm Wind	Mohawk, 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, 4.7 hours before the alert went out and 265 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: 757 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 646 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMRX 261642
SVRMRX
TNC059-261730-
/NEW.KMRX.SV.W.0167.261642-261730/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
1242 PM EDT TUE JUN 26 2001

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

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

* UNTIL 130 PM EDT

* AT 1242 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTH OF CEDAR CREEK...OR 7 MILES
  SOUTHWEST OF GREENEVILLE...MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  7 MILES SOUTHEAST OF MOSHEIM AROUND 1250 PM EDT
  GREENEVILLE AROUND 100 PM EDT
  TUSCULUM AROUND 110 PM EDT
  CHUCKY AROUND 120 PM EDT

THE SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING...
  WINDS UP TO 70 MPH...WHICH COULD PUSH OVER SHALLOW ROOTED TREES...
  AND DAMAGE CHIMNEYS AND TV ANTENNAS.
  DAMAGING HAIL UP TO 1 3/4 INCH IN DIAMETER...OR THE SIZE OF
  GOLFBALLS.
  VERY HEAVY RAINFALL WHICH MAY CAUSE LOCALIZED FLOODING.
  FREQUENT AND DEADLY CLOUD-TO-GROUND LIGHTNING.

SEEK A STURDY SHELTER IMMEDIATELY

$$

LAT...LON 3609 8307 3596 8291 3619 8265 3641 8270

RBP

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 26, 10:29 AM EDT, 2 hours 13 minutes earlier.

Area forecast discussion, Jun 26, 10:29 AM EDT, 2 hours 13 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
1029 AM EDT TUE JUN 26 2001

WILL UPDATE TO TAKE OUT MORNING FOG...NO OTHER CHANGES PLANNED.
SATELLITE SHOWING COLD CORE UPPER LOW SPINNING OVER TN/KY BORDER
WHICH IS PRETTY WELL TIMED BY 06Z MESOETA.  UPPER LOW PROGGED TO
CONTINUE MOVING WEST.  SOME THUNDERSTORMS ALREADY FIRING IN NC...WITH
A FEW SHOWERS EXTENDING INTO OUR MOUNTAINS AND NORTHEAST ZONES.
EXPECT SIMILAR SCATTERED COVERAGE AS YESTERDAY...WILL KEEP 50 POPS IN
THE MOUNTAINS AND 40 POPS FOR THE VALLEY AND PLATEAU.  BUT...WE HAVE
MORE CLOUDS THAT YESTERDAY WHICH SHOULD HOLD DOWN TEMPERATURES A BIT
AND KEEP CONVECTION FROM GETTING OUT OF HAND.  STILL EXPECT ISOLATED
STRONG TO SEVERE PULSE STORMS THIS AFTERNOON AND EARLY EVENING WITH
DECENT INSTABILITY AND VORTICITY MAXES PROVIDING LIFT...BUT PROBABLY
LESS THAN YESTERDAY.  TEMPERATURES LOOK ON TRACK.

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

GH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 12:16 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	29 min
Jun 26, 1:01 PM EDT	Severe Thunderstorm Warning	MRX	Hawkins	44 min
Jun 26, 4:28 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton	47 min
Jun 26, 5:12 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton	33 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2001 Every severe thunderstorm warning in 2001

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.