Alert archive / Tennessee / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 166, NWS Morristown, TN

July 30, 2000Hamilton County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 30, 2000, 5:24 PM EDT for Hamilton County, Tennessee. It was in force for 51 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: Jul 30, 2000, 5:24 PM EDT (21:24 UTC)
Expired: Jul 30, 2000, 6:15 PM EDT
In force: 51 min
Issued by: NWS Morristown, TN
Area: Whole counties

County Hamilton County, TN

What was reported inside it

Time	Report	Where	Remark
Jul 30, 5:50 PM EDT	Thunderstorm Wind	Chattanooga, 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 12:00Z, 9.4 hours before the alert went out and 167 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: 240 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 578 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 92 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 
WUUS54 KMRX 302126 COR
SVRMRX
TNC065-302215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
524 PM EDT SUN JUL 30 2000

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HAMILTON COUNTY IN EASTERN TENNESSEE

* UNTIL 615 PM EDT

* AT 524 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES SOUTHWEST OF CHATTANOOGA...OR NEAR
  CHATTANOOGA VALLEY...MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CHATTANOOGA AROUND 535 PM EDT
  EAST BRAINERD AROUND 550 PM EDT
  HARRISON AROUND 600 PM EDT

THE SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING...
  WINDS UP TO 60 MPH...WHICH COULD PUSH OVER SHALLOW ROOTED TREES AND
  BREAK LIMBS OFF OF TREES ABOUT THE SIZE OF YOUR WRIST.
  HAIL UP TO 1 INCH IN DIAMETER...OR THE SIZE OF QUARTERS.

AVOID USING THE TELEPHONE OR OTHER ELECTRICAL EQUIPMENT WHILE
LIGHTNING IS IN THE AREA.

$$

TG

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 30, 2:50 PM EDT, 2 hours 34 minutes earlier.

Area forecast discussion, Jul 30, 2:50 PM EDT, 2 hours 34 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
250 PM EDT SUN JUL 30 2000

DESPITE LINGERING CLOUDINESS CAPES WERE REACHING 1000 TO 2000 J/KG
MOST AREAS...AND ALREADY HAD 4 STORMS PULSE BRIEFLY TO SEVERE LEVELS.
SCATTERED COVERAGE ALREADY ACROSS ERN 2/3RDS OF FORECAST AREA...WITH
BEST UPPER LEVEL SUPPORT YET TO ARRIVE!

MESO-ETA SEEMS ONCE AGAIN TO HAVE GOOD HANDLE ON SITUATION.  WATER
VAPOR SATELLITE PICS INDICATE A SHORTWAVE/VORT LOBE LIFTING NE INTO
W TN...WITH LATEST MESO-ETA AND RUC MODELS MOVING THIS FEATURE EAST
INTO MIDDLE TN BY 31/03Z.  GOOD UPPER LEVEL DIVERGENCE OVER OUR
AREA FROM LATE EVENING ON...WHILE SOUTHERLY LOW LEVEL FLOW CONTS TO
PROVIDE MOISTURE CONVERGENCE...ESPECIALLY TO UPSLOPE REGIONS.
THUS...I WILL GO SLIGHTLY ABOVE MOS POPS ON THE ORDER OF 60-80%...
AND ALSO MENTION RAIN MAY BE HEAVY AT TIMES.  STORMS ARE MOVING A
BIT FASTER TODAY DUE TO STRONGER WINDS ALOFT.  MAY TOSS IN SOME
MENTION OF SEVERE...BUT WILL WATCH RADAR TRENDS.

LATER PERIODS...THREAT OF CONVECTION LOOKS HIGH INTO AT LEAST EARLY
MONDAY.  UPPER LEVEL TROF WEAKENS AND WE SEEM TO GET MUCH LESS
UPPER LEVEL SUPPORT FROM MON NIGHT INTO TUE.  BEST MOISTURE SHIFTS
A LITTLE EAST AND EXPECT BEST LOW LVL CONVERGENCE FOR 3RD/4TH PERIODS
IN MTN ZONES.  THUS...WENT A LITTLE HIGHER ON POPS FOR MTN ZONES.

OTHERWISE...CHA WAS COOLER THAN TRI TODAY DUE TO CLOUDINESS.
SLIGHTLY COOLER FAN MAXES MAY BE A BETTER CHOICE GIVEN CONSIDERABLE
CLOUDS...COMPROMISED FOR NOW.  MOS MINS QUITE CLOSE AND ACCEPTED.
PRELIMINARY TEMPS/POPS BELOW ARE FOR COORDINATION PURPOSES:

CHA TB 070/085 069/084 070 10854
TYS TB 069/084 068/084 068 10864
TRI TT 066/083 065/081 064 10664
OQT TB 068/084 068/084 068 10864

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

TG

In the hours before

Local storm report, Jul 30, 3:10 PM EDT, 2 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
310 PM EDT SUN JUL 30 2000

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

0120 PM    1 W VONORE                TN   WIND DAMAGE
07/30/00   MONROE                         REPORTED BY DISPATCH
                                          TREES DOWN ON POWER
                                          LINES.

0200 PM    2 NE ALCOA                TN   WIND DAMAGE
07/30/00   BLOUNT                         REPORTED BY ALCOA ELECTRIC
                                          TREES DOWN ON POWER
                                          LINES.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 8:02 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Knox	43 min
Jul 29, 8:49 PM EDT	Severe Thunderstorm Warning	MRX	Union	41 min
Jul 29, 9:12 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Jefferson	48 min
Jul 29, 9:20 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne	40 min
Jul 29, 9:21 PM EDT	Severe Thunderstorm Warning	MRX	Hamblen	39 min
Jul 29, 9:45 PM EDT	Severe Thunderstorm Warning	MRX	Hancock	45 min
Jul 30, 1:05 PM EDT	Severe Thunderstorm Warning	MRX	Monroe	25 min
Jul 30, 1:27 PM EDT	Severe Thunderstorm Warning	MRX	Sevier	33 min
Jul 30, 1:44 PM EDT	Severe Thunderstorm Warning	MRX	Blount	46 min
Jul 30, 1:46 PM EDT	Severe Thunderstorm Warning	MRX	Jefferson	29 min
Jul 30, 6:35 PM EDT	Severe Thunderstorm Warning	MRX	McMinn	40 min
Jul 30, 7:01 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Meigs, Rhea	29 min
Jul 30, 7:33 PM EDT	Severe Thunderstorm Warning	MRX	Rhea	22 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.