Alert archive / Tennessee / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 202, NWS Nashville, TN

June 25, 2000Grundy County, Warren County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jun 25, 2000, 5:50 PM CDT for Grundy County, Warren County, Tennessee. It was in force for 25 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 25, 2000, 5:50 PM CDT (22:50 UTC)
Expired: Jun 25, 2000, 6:15 PM CDT
In force: 25 min
Issued by: NWS Nashville, TN
Area: Whole counties

Counties Grundy County, TN, Warren County, TN

What was reported inside it

Time	Report	Where	Remark
Jun 25, 6:10 PM CDT	Thunderstorm Wind 50 E	Viola, TN	Local law enforcement reported large tree limbs down on State Route 108.

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, 10.8 hours before the alert went out and 101 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: 1077 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1339 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 20 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 KOHX 252251
SVRBNA
TNC061-177-252315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
550 PM CDT SUN JUN 25 2000

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN GRUNDY COUNTY IN TENNESSEE
  WARREN COUNTY IN TENNESSEE
  THIS INCLUDES THE CITY OF MCMINNVILLE

* UNTIL 615 PM CDT

* AT 543 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES SOUTHWEST OF MCMINNVILLE...MOVING
  SOUTHEAST AT 10 MPH.

DAMAGING WINDS AND HAIL WITH TORRENTIAL RAINFALL ARE EXPECTED WITH
THIS STORM. TAKE COVER IN A STURDY STRUCTURE UNTIL THE STORM PASSES.
.

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 Nashville, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 25, 2:55 PM CDT, 2 hours 55 minutes earlier.

Area forecast discussion, Jun 25, 2:55 PM CDT, 2 hours 55 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
255 PM CDT SUN JUN 25 2000

FORECAST QUANDARIES...PCPN CHANCES...TEMPS.

CURRENT ASOS/AWOS OBSERVATIONS...RADAR MOSAICS...REGIONAL SATELLITE
IMAGERY...AND MSAS/SURFACE ANALYSES SHOWING SURFACE TROUGH
OVER NORTHERN CWA WITH WIDELY SCATTERED CONVECTION INITIATING ALONG
IT. DEWPOINT DEPRESSIONS ARE AVERAGING 15 TO 20 DEGREES WITH SURFACE
WIND FIELDS MAINLY SWLY. REGION EXPERIENCING PARTLY CLOUDY SKY
CONDITIONS DUE TO WEAK SURFACE RIDGING AT THIS TIME...BUT WITH
SURFACE LI/S APPROACHING -5 AND K INDICES IN THE LOW 30S...ATMOSPHERE
INSTABILITY DEVELOPING. PCPN WATER VALUES IN THE 1.5 INCH RANGE ALSO.
RUC/UPPER AIR CHART DEPICTIONS SHOWING UPPER LEVEL TROUGHING SUPPORT
WITH VORT MAX CENTERED IN S IN. MOISTURE DEPTH EXTENDING INTO
THE MID LEVELS...ESPECIALLY NORTHERN PORTIONS...WITH DEVELOPING
WESTERLY FLOW ALOFT.

NGM/S 12Z SUN REGIONAL MODEL RUNS INITIALIZATION MOST ACCURATE...
WITH ETA/AVN SLIGHTLY LESS AMPLIFIED BUT ALSO "IN THE BALL PARK".
AVN HAS BEEN MOST CONSISTENT WITH POPS OVER THE LAST FEW MODEL RUNS.
NGM SOLUTION SEEMS TO BE COMING "MORE IN LINE" WITH AVN SOLUTION ON
POPS. AS A RESULT...WILL LEAN TOWARD A COMPROMISE NGM/AVN SOLUTION
THROUGH 00Z WED.

LOOK FOR SURFACE TROUGH TO MOVE EAST OF REGION THIS AFTERNOON WITH
SOUTHERLY FLOW CONTINUING UNDER WEAK RIDGING INFLUENCES TONIGHT.
MID LEVELS DRY AIR ADVECTION SHOULD DEVELOP WITH UPPER LEVEL FLOW
BECOMING MORE ZONAL. HOWEVER...PREVALENT LOW LEVEL MOISTURE SHOULD
SUPPORT PARTLY CLOUDY SKY CONDITIONS TONIGHT. WILL CONTINUE
MENTIONING OF ISOLATED MAINLY EVENING THUNDERSTORMS TONIGHT.
OF PARTICULAR NOTE...LOW PRESSURE SYSTEM DEVELOPMENT  ACROSS
UPPER MICHIGAN WITH TRAILING COLD FRONT INTO THE THE TX PANHANDLE
REGION BY 12Z MON.

SURFACE LOW PRESSURE SYSTEM WILL MOVE INTO WESTERN TN BY 00Z TUE
WITH WEAK RIDGING AND SWLY FLOW TO CONTINUE INFLUENCING REGIONAL
WEATHER. VARIABLE CLOUDINESS AND SCATTERED POPS THROUGH 00Z TUE
SHOULD PREVAIL. AS THE FRONT MOVES INTO W CWA BY 12Z TUE...ALONG
WITH SHORTWAVE PASSAGES...LOOK FOR SKIES TO BECOME CLOUDY MONDAY
NIGHT WITH THE BEST CHANCE FOR SCATTERED CONVECTION AFTER 06Z TUE
TO 18Z TUE. MODEL INSTABILITY PARAMETERS SUPPORT CONVECTIVE
DEVELOPMENT...BUT ATMOSPHERE SHOULD NOT DESTABILIZE ENOUGH
TO SUPPORT SVR CONVECTION. SKIES WITH REMAIN MOSTLY CLOUDY ON
TUESDAY WITH GRADUAL DECREASE IN CLOUDINESS DURING THE AFTERNOON
WEST. EVEN WITH FRONTAL PASSAGE...CAN NOT RULE OUT SCATTERED
CONVECTION AGAIN DURING THE DAY ON TUESDAY WITH NW FLOW...PER
MODEL SOUNDINGS.

EXTENDED...CHANCE OF SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH
12Z FRI...WITH DECREASING CLOUDINESS REGION WIDE ON FRIDAY AS
UPPER LEVEL TROUGH MOVES EAST OF REGION.

TEMPS...WITH LOWS TEMPS AT BNA THIS MORNING IN THE UPPER 70S
UNDER SWLY FLOW...AND THIS FLOW EXPECTED TO CONTINUE THROUGH
12Z TUE...WILL RAISE AVN/NGM LOWS A FEW DEGREES...ESPECIALLY
MONDAY NIGHT WITH INCREASED CLOUD COVER. NGM MOS HAS VERIFIED
WELL WITH HIGH TEMPERATURE VALUES AS OF LATE...AND WILL LEAN
TOWARD ACCORDINGLY.

PRELIMINARY NUMBERS FOR COORDINATION PURPOSES ONLY...

BNA 07z3/093/075/088 1344
CSV 067/088/069/082 1334

.BNA...NONE.
14
JBW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 4:05 PM CDT	Severe Thunderstorm Warning	OHX	Rutherford	25 min
Jun 25, 5:57 PM CDT	Severe Thunderstorm Warning	OHX	Coffee	33 min
Jun 25, 6:27 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Franklin	33 min
Jun 25, 6:49 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Coffee, Franklin, Moore	26 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.