Alert archive / North Carolina / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 302, NWS Morristown, TN

November 30, 1997Cherokee County, North Carolina

NWS Morristown, TN issued this severe thunderstorm warning at Nov 30, 1997, 6:33 PM EST for Cherokee County, North Carolina. 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: Nov 30, 1997, 6:33 PM EST (23:33 UTC)
Expired: Nov 30, 1997, 7:00 PM EST
In force: 27 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 23:36 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
Nov 30, 6:50 PM EST	Hail 1.25	Andrews, NC
Nov 30, 6:50 PM EST	Hail 1.25	Andrews, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Nov 30, 2:30 PM EST	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.6 hours before the alert went out and 255 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: 194 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 496 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Nov 30, 1:57 PM EST, 4 hours 36 minutes earlier.

Area forecast discussion, Nov 30, 1:57 PM EST, 4 hours 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
200 PM EST SUN NOV 30 1997

AFTER COORD WITH SPC...DECIDED A WATCH IS IN ORDER LATE THIS AFTN/EVE
FOR A GOOD CHUNK OF EAST TN.  AS STATED EARLIER IN THE ATO THE MAIN
THREAT WL BE LARGE HAIL DUE TO THE LOW WBZ HEIGHTS AND VERY COLD AIR
ALOFT.

THE UPR LOW WL CONTINUE TO TRACK JUST SOUTH OF EAST TNT REACHING NE
AL/NW GA BY 00Z AND THE SC COAST BY 12Z MON.  THUS RAPID CHANGES ARE
ANTICIPATED TNT AND EARLY MON.  AFTER THIS EVE'S CONVECTION THE CHC
FOR MORE STRATIFORM RAIN WL INCREASE LATE TNT AS THE MID/UPR LVL
DEFORMATION ZONE MOVES ACROSS THE CWA AND EXITS BY THE MORNING.
ANOTHER THIRD AREA OF PCPN IS CURRENTLY PIVOTING THROUGH CNTRL EAST TN
AND HEADING TWDS NE TN AND SW VA.  THIS IS IN ASSCTN WITH THE OCCLD
FNT.  INSTEAD OF GETTING TOO FANCY WITH THE TIMING OF THESE THREE
SEPARATE AREAS OF PCPN I WOULD JUST GO WITH LKLY POPS FOR ALL ZONES
TNT.

RAPID CLEARING EXCEPT ACROSS SW VA AND EXTREME NE TN WL TAKE PLACE ON
MON AS THE MAIN COLD FNT BLASTS THROUGH.  WINDS WL BE QUITE BREEZY
BEHIND THE FNT.  WOULD CONTINUE TO MENTION THIS IN ALL THE ZONES.
TRANQUIL AND DRY WX WL BE THE RULE FOR THE REMAINDER OF THE FTCST PD.

OVERALL I PREFER THE FAN NOS THROUGHOUT.

MB

In the hours before

Local storm report, Nov 30, 5:06 PM EST, 1 hour 27 minutes before

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Local storm report, Nov 30, 5:46 PM EST, 47 minutes before

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Local storm report, Nov 30, 6:13 PM EST, 20 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 30, 4:05 PM EST	Severe Thunderstorm Warning	MRX	Washington	25 min
Nov 30, 4:20 PM EST	Severe Thunderstorm Warning	MRX	Hamilton	25 min
Nov 30, 4:37 PM EST	Severe Thunderstorm Warning	MRX	Carter	38 min
Nov 30, 4:41 PM EST	Severe Thunderstorm Warning	MRX	Rhea	49 min
Nov 30, 4:45 PM EST	Severe Thunderstorm Warning	MRX	Cumberland	60 min
Nov 30, 5:29 PM EST	Severe Thunderstorm Warning	MRX	Rhea	46 min
Nov 30, 5:38 PM EST	Severe Thunderstorm Warning	MRX	Roane	52 min
Nov 30, 4:55 PM EST	Severe Thunderstorm Warning	MRX	Cherokee	35 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 1997 Every 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.