Alert archive / Tennessee / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 124, NWS Morristown, TN

July 14, 2000Hamblen County, Jefferson County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 14, 2000, 10:56 PM EDT for Hamblen County, Jefferson County, Tennessee. It was in force for 49 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: Jul 14, 2000, 10:56 PM EDT (02:56 UTC)
Expired: Jul 14, 2000, 11:45 PM EDT
In force: 49 min
Issued by: NWS Morristown, TN
Area: Whole counties

Counties Hamblen County, TN, Jefferson County, TN

The radar

The Knoxville radar (KMRX), 6 km from the middle of the area, began a volume at 02:57 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

Time	Report	Where	Remark
Jul 14, 11:15 PM EDT	Thunderstorm Wind	Countywide, TN
Jul 14, 11:20 PM EDT	Hail 0.75	White Pine, 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 00:00Z, 2.9 hours before the alert went out and 291 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: 3001 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1555 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 9.1

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 Jul 14, 9:40 PM EDT, 1 hour 16 minutes earlier.

Area forecast discussion, Jul 14, 9:40 PM EDT, 1 hour 16 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
940 PM EDT FRI JUL 14 2000

RATHER BUSY HERE...HAVE BEEN WATCHING JKL/S BACK SINCE THEY HAVE
RADAR PROBLEMS.  JUST SENT OUT QUICK UPDATE TO RAISE POPS IN THE
NORTH. THATS ALL FOR NOW.

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

LDW

In the hours before

Local storm report, Jul 14, 9:45 PM EDT, 1 hour 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
945 PM EDT FRI JUL 14 2000

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ...COUNTY LOCATION....

0925 PM    BIG STONE GAP             VA   0.75 INCH HAIL
07/15/00   WISE                           REPORTED BY AMATEUR RADIO
                                          DIME SIZE HAIL REPORTED
                                          BY HAM RADIO
                                          OPERATOR/SPOTTER IN BIG
                                          STONE GAP AT 925 PM EDT.

0925 PM    BIG STONE GAP                  60 MPH TSTM GUST
07/15/00   WISE                           REPORTED BY AMATEUR RADIO
                                          HAM RADIO OPERATOR
                                          REPORTED MEASURED WIND
    	                                      GUSTS TO 60 MPH IN BIG
                                          STONE GAP AT 925 PM.

Local storm report, Jul 14, 10:05 PM EDT, 51 minutes before

WWUS54 KMRX 150151
LSRMRX

PRELIMINARY LOCAL STORM REPORT...COR
NATIONAL WEATHER SERVICE MORRISTOWN TN
1005 PM EDT FRI JUL 14 2000

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ...COUNTY LOCATION....

0925 PM    BIG STONE GAP             VA   0.75 INCH HAIL
07/15/00   WISE                           REPORTED BY AMATEUR RADIO
                                          DIME SIZE HAIL REPORTED
                                          BY HAM RADIO
                                          OPERATOR/SPOTTER IN BIG
                                          STONE GAP AT 925 PM EDT.

0925 PM    BIG STONE GAP             VA   60 MPH TSTM GUST
07/15/00   WISE                           REPORTED BY AMATEUR RADIO
                                          HAM RADIO OPERATOR
                                          REPORTED MEASURED WIND
                                          GUSTS TO 60 MPH IN BIG
                                          STONE GAP AT 925 PM.

GRC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 9:51 PM EDT	Severe Thunderstorm Warning	MRX	Hawkins	39 min
Jul 14, 10:02 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan	43 min
Jul 14, 10:26 PM EDT	Severe Thunderstorm Warning	MRX	Grainger	34 min
Jul 14, 10:31 PM EDT	Severe Thunderstorm Warning	MRX	Greene	44 min
Jul 14, 10:52 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	38 min
Jul 14, 10:59 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Unicoi, Washington	61 min
Jul 14, 11:27 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	33 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2000 Every severe thunderstorm warning in 2000

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.