Alert archive / Tennessee / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 113, NWS Morristown, TN

May 27, 1996Polk County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at May 27, 1996, 7:52 PM EDT for Polk County, Tennessee. It was in force for 68 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: May 27, 1996, 7:52 PM EDT (23:52 UTC)
Expired: May 27, 1996, 9:00 PM EDT
In force: 68 min
Issued by: NWS Morristown, TN
Area: Whole counties

County Polk County, TN

What was reported inside it

Time	Report	Where	Remark
May 27, 8:40 PM EDT	Thunderstorm Wind	Western Part, 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.9 hours before the alert went out and 195 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: 1170 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 582 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -35 m²/s²
0-3 km storm-relative helicity: -25 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.

000 
TTAA00 KMRX 272352
SVRMRX
TNC139-280100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KNOXVILLE TRI CITIES TN
752 PM EDT MON MAY 27 1996
 
THE NATIONAL WEATHER SERVICE IN KNOXVILLE TRI CITIES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  900 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST TENNESSEE
 
   ...POLK COUNTY
 
A LINE OF SEVERE THUNDERSTORMS WITH A HISTORY OF DAMAGING WINDS AND
HEAVY RAINS IS MOVING INTO WESTERN POLK COUNTY. WINDS IN EXCESS OF 55
MPH HAVE BEEN REPORTED WITH THIS LINE...AS WELL AS SMALL TORNADOES.
TAKE COVER IF OUTSIDE.
 
 
REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO AD0VANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

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 May 27, 2:17 PM EDT, 5 hours 35 minutes earlier.

Area forecast discussion, May 27, 2:17 PM EDT, 5 hours 35 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
215 PM EDT MON MAY 27 1996

OUTFLOW BNDRY CURRENTLY STRETCHING FROM SOMERSET KY TO AROUND BNA
AND THEN WWD TO AROUND MO BOOTHEEL.  SRN END HAS SLOWED DOWN
CONSIDERABLY BUT WL SPEED UP AS MORE CONVECTION RACES EWD ACROSS AR.
EXTREMELY UNSTABLE AIRMASS IS IN PLACE ACROSS EAST TN... SW VA AND SW
NC.  THUS NEEDLESS TO SAY WE WL CONTINUE THE THREAT FOR DMGG
WINDS/LARGE HAIL ACROSS MOST OF THE RGN TNT.  FLASH FLOODING THREAT WL
ALSO CONTINUE AS MOISTURE CONTENT AND POTENTIAL FOR REPEAT ACTIVITY WL
REMAIN HIGH TNT.  CURRENT CONFIGURATION LOOKS GOOD.  THUS LKLY POPS
FOR ALL ZONES TNT.  ACTIVITY WL TAPER OFF WELL AFT MIDNIGHT AS DRIER
AIR TRIES TO WORK IN FROM THE WEST.

ON TUE NVA ALONG WITH DRIER AIR WL KEEP STORMS ONLY SCTD AT BEST.
MAIN AREAS OF CONVECTION WL BE TO OUR NORTH ALONG THE QUASI-STNRY
FNTL BNDRY.  THE FNT WL BEGIN SINKING SWD ON WED AS PRESSURES RISE
ACROSS THE GRT LKS RGN.  THUS POPS WL BE INCREASING THROUGH THE DAY ON
WED.  TEMPS WL REMAIN SUMMER-LIKE THROUGH THE PD.  MB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 5:42 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Knox, Union	63 min
May 27, 5:42 PM EDT	Severe Thunderstorm Warning	MRX	Roane	63 min
May 27, 6:35 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Jefferson	55 min
May 27, 6:46 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton, Rhea	59 min
May 27, 7:02 PM EDT	Severe Thunderstorm Warning	MRX	Cumberland	58 min
May 27, 7:02 PM EDT	Severe Thunderstorm Warning	MRX	Meigs	58 min
May 27, 7:08 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Knox, Loudon, Roane	67 min
May 27, 7:15 PM EDT	Severe Thunderstorm Warning	MRX	McMinn	60 min
May 27, 7:22 PM EDT	Tornado Warning	MRX	Meigs	53 min
May 27, 7:30 PM EDT	Tornado Warning	MRX	Bradley	45 min
May 27, 7:34 PM EDT	Severe Thunderstorm Warning	MRX	Monroe	56 min
May 27, 7:39 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	66 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 1996 Every severe thunderstorm warning in 1996

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.