Alert archive / Tennessee / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 78, NWS Morristown, TN

June 25, 2001Knox County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 25, 2001, 1:48 PM EDT for Knox County, Tennessee. It was in force for 27 min. 2 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 25, 2001, 1:48 PM EDT (17:48 UTC)
Expired: Jun 25, 2001, 2:15 PM EDT
In force: 27 min
Issued by: NWS Morristown, TN
Area: Whole counties

County Knox County, TN

The radar

The Knoxville radar (KMRX), 52 km from the middle of the area, began a volume at 18:09 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 25, 2:03 PM EDT	Thunderstorm Wind	Knoxville, TN
Jun 25, 2:05 PM EDT	Thunderstorm Wind	Knoxville, 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

Nashville Metro, TN (KBNA), launched 12:00Z, 5.8 hours before the alert went out and 240 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: 29 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 1283 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 67 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.

431 
WUUS54 KMRX 251749
SVRMRX
TNC093-251815-
/NEW.KMRX.SV.W.0157.251748-251815/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
148 PM EDT MON JUN 25 2001

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

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

* UNTIL 215 PM EDT

* AT 145 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR LAKE FOREST...OR 8 MILES SOUTHEAST OF
  KNOXVILLE...MOVING SOUTHWEST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  7 MILES SOUTHEAST OF BEARDEN AROUND 205 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.
  HAIL UP TO 1 INCH IN DIAMETER...OR THE SIZE OF QUARTERS.
  VERY HEAVY RAINFALL WHICH MAY CAUSE LOCALIZED FLOODING.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A STRONG BUILDING.

$$

LAT...LON 3589 8379 3602 8382 3587 8423 3581 8415
          3587 8402 3585 8385

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 25, 10:40 AM EDT, 3 hours 8 minutes earlier.

Area forecast discussion, Jun 25, 10:40 AM EDT, 3 hours 8 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
419 AM EDT MON JUN 25 2001

UPPER LOW JUST TO OUR EAST.  VORTICITY MAXES TRIGGERING SHOWERS IN
NE ZONES AND CHEROKEE AND CLAY.  CLOUDS WILL CONTINUE PUSHING INTO
CWA THIS AFTERNOON AS UPPER LOW SHIFT WEST....WILL GO WITH INCREASING
CLOUDS WHERE ITS NOT MOSTLY CLOUDY ALREADY.  WITH CLOUDS...WILL
UPDATE TO LOWER TEMPERATURES A BIT IN THE CENTRAL AND NORTH.  POPS
LOOK GOOD. WITH THE COLD UPPER LOW OVER THE AREA...COULD SEE ISOLATED
SEVERE STORMS THIS AFTERNOON AND EVENING...BUT THINK MOISTURE TOO
LIMITED FOR WIDESPREAD ACTIVITY.

.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 25, 2:26 PM EDT	Severe Thunderstorm Warning	MRX	Blount	64 min
Jun 25, 2:38 PM EDT	Severe Thunderstorm Warning	MRX	Polk	52 min
Jun 25, 3:14 PM EDT	Severe Thunderstorm Warning	MRX	Greene	61 min
Jun 25, 6:06 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan	39 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.