Alert archive / North Carolina / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 190, NWS Morristown, TN

June 21, 1997Cherokee County, North Carolina

NWS Morristown, TN issued this severe thunderstorm warning at Jun 21, 1997, 1:57 PM EDT for Cherokee County, North Carolina. It was in force for 63 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
Jun 21, 1997, 1:57 PM EDT (17:57 UTC)
Expired
Jun 21, 1997, 3:00 PM EDT
In force
63 min
Issued by
NWS Morristown, TN
Area
Whole counties

County Cherokee County, NC

The radar

The Knoxville radar (KMRX), 130 km from the middle of the area, began a volume at 17:57 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

TimeReportWhereRemark
Jun 21, 2:00 PM EDTHail 1.75Ranger, NC

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, 6.0 hours before the alert went out and 200 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 1997-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 76 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 1997-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
76 J/kg
Mixed-layer CIN
-222 J/kg
Mixed-layer LCL
704 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
14 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 21, 10:25 AM EDT, 3 hours 32 minutes earlier.

Area forecast discussion, Jun 21, 10:25 AM EDT, 3 hours 32 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
1015 AM EDT SAT JUN 21 1997

LINE OF THUNDERSHOWWERS MOVG ESE FROM MID TN TOWARD OUR CWA.  ALTHO
IT'S WEAKND SOME IN LAST COUPLE HRS...IT'S STILL HOLDING TOGETHER.
DIFFICULT TO SEE FORCING FOR THIS LINE...WHICH PERHAPS WAS INITIATED
BY OUTFLO BNDRY SET OFF BY DYING CONVECT THIS MORN IN AL.  PREV AFD
SUGGESTED LWR POPS FOR TN VLY...WUD BUMP THAT UP AT LST 10 PCT NOW...
GIVEN THAT THERE IS SOME MESOSCALE ORGANIZATION FOR CONVECT.
HWVR...A LITTLE LESS UNST IN EAST TN COMPARED TO MID STATE...SO XPCT
CONTINUED WEAKENING.

OTHRW...XPCT ANOTHER DAY LIKE YEST AS FAR AS CONVECT GOES.  SPENT A
LOT OF TIME LOOKING AT MOD SNDG.  IT SHOWS A LITTLE LESS DRY CONDS
ALFT...PROB A REFLECT OF UPR LOW (NOW IN NRN GA).  WBZ A LITTLE HIER
TOO.  ALSO...STRONGER SW FLOW IN LWR TROP SEEMS TO BE GIVING A LITTLE
FASTER MVMNT TO THE CONVECT TODAY.  SO...A LITTLE SMALLER
HAIL...DOWNBURST INTENSITY...AND RAINFALL AMTS SEEM TO BE IN THE
OFFING.  EMPHASIS IS ON "A LITTLE" HWVR.  WILL HAVE TO WATCH MESOSCALE
ORGAN OF APCHNG LINE TO SEE IF IT HANGS TOGETHER...IF IT DOES
INTENSITY OF CONVECT CUD BE GREATER THAN YEST.

UPR LO STILL HAS A zLITTLE COOL POCKET ASSOC...DESTABILIZING THE
ATMOS...AND WON'T GO ANYWHERE THRU TOMORO.

SMH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 1:31 PM EDTFlash Flood WarningMRXPolk59 min
Jun 21, 1:31 PM EDTSevere Thunderstorm WarningMRXPolk59 min
Jun 21, 2:08 PM EDTSevere Thunderstorm WarningMRXHamilton67 min
Jun 21, 2:33 PM EDTFlash Flood WarningMRXHamilton117 min
Jun 21, 2:39 PM EDTFlash Flood WarningMRXMorgan2 hr
Jun 21, 3:00 PM EDTFlash Flood WarningMRXBlount, Monroe2 hr
Jun 21, 3:00 PM EDTSevere Thunderstorm WarningMRXBlount, Monroe2 hr
Jun 21, 3:30 PM EDTFlash Flood WarningMRXSevier2 hr
Jun 21, 3:30 PM EDTSevere Thunderstorm WarningMRXSevier2 hr
Jun 21, 3:56 PM EDTSevere Thunderstorm WarningMRXMeigs49 min
Jun 21, 4:41 PM EDTSevere Thunderstorm WarningMRXCocke64 min
Jun 21, 5:14 PM EDTSevere Thunderstorm WarningMRXAnderson, Knox61 min
Jun 21, 5:31 PM EDTSevere Thunderstorm WarningMRXHamblen29 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 1997Every severe thunderstorm warning in 1997

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.