Alert archive / Tennessee / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 112, NWS Morristown, TN

July 1, 2002Hamilton County, Sequatchie County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 1, 2002, 3:15 PM EDT for Hamilton County, Sequatchie County, Tennessee. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 1, 2002, 3:15 PM EDT (19:15 UTC)
Expired: Jul 1, 2002, 4:00 PM EDT
In force: 45 min
Issued by: NWS Morristown, TN
Area: Whole counties

Counties Hamilton County, TN, Sequatchie County, TN

The radar

The Northeast Alabama radar (KHTX), 82 km from the middle of the area, began a volume at 19:19 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.3 hours before the alert went out and 152 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: 2120 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 913 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 23 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.

988 
WUUS54 KMRX 011915
SVRMRX
TNC065-153-012000-
/NEW.KMRX.SV.W.0151.011915-012000/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
315 PM EDT MON JUL 1 2002

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HAMILTON COUNTY IN EAST TENNESSEE
  SEQUATCHIE COUNTY IN EAST TENNESSEE

* UNTIL 400 PM EDT(300 PM CDT)

* AT 314 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES NORTHWEST OF SODDY-DAISY...OR 9 MILES
  SOUTHEAST OF DUNLAP...MOVING SOUTH AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SODDY-DAISY AROUND 330 PM EDT
  MIDDLE VALLEY AROUND 350 PM EDT
  7 MILES WEST OF HARRISON AROUND 400 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.

$$

LAT...LON 3530 8551 3499 8498 3530 8507 3542 8517

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 1, 9:50 AM EDT, 5 hours 25 minutes earlier.

Area forecast discussion, Jul 1, 9:50 AM EDT, 5 hours 25 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
950 AM EDT MON JUL 1 2002

UPDATED TO REMOVE PATCHY MORNING FOG WORDING. REMAINDER OF FCST ON
TRACK WITH VORT DROPPING S AROUND UPR RIDGE. CURRENTLY AFFECTING SE
OH W VA AND SHOULD IMPINGE ON SW VA ZONE AROUND 18Z AND LATER.
ELSEWHERE...BELIEVE HIGHER POPS IN TERRAIN WARRANTED DUE TO
PERSISTANCE OF WX PATTERN AND PAST COUPLE DAYS NEARLY IDENTICAL
DEVELOPMENT OF TSRA ALONG TN/NC BORDER AND ACROSS CUMBERLAND
PLATEAU. TEMP FCST ON TRACK WITH MAXES IN LWR 90S IN THE GREAT
VALLEY.

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 9:09 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton	36 min
Jul 1, 3:08 PM EDT	Severe Thunderstorm Warning	MRX	Marion	22 min
Jul 1, 3:31 PM EDT	Severe Thunderstorm Warning	MRX	Marion	29 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.