Alert archive / Tennessee / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 283, NWS Nashville, TN

August 5, 2000Grundy County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Aug 5, 2000, 3:50 PM CDT for Grundy 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: Aug 5, 2000, 3:50 PM CDT (20:50 UTC)
Expired: Aug 5, 2000, 4:15 PM CDT
In force: 25 min
Issued by: NWS Nashville, TN
Area: Whole counties

County Grundy County, TN

The radar

The Northeast Alabama radar (KHTX), 61 km from the middle of the area, began a volume at 20:51 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
Aug 5, 4:00 PM CDT	Thunderstorm Wind 50 E	Countywide, TN	Sheriff's office reported a few trees down around the county.

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, 8.8 hours before the alert went out and 114 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: 1418 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 804 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KOHX 052051
SVRBNA
TNC061-052115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
350 PM CDT SAT AUG 5 2000

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GRUNDY COUNTY IN TENNESSEE

* UNTIL 415 PM CDT

* AT 342 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS 16 MILES WEST OF GRUETLI-LAAGER...OR ABOUT 10
  MILES EAST OF MANCHESTER...MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GRUETLI-LAAGER AT 415 PM CDT

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

$$

JLM

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 Aug 5, 2:15 PM CDT, 1 hour 35 minutes earlier.

Area forecast discussion, Aug 5, 2:15 PM CDT, 1 hour 35 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
215 PM CDT SAT AUG 5 2000

LATEST SURFACE CHART SHOWING WARM FRONTAL BOUNDARY FROM SOUTHERN
ILLINOIS DOWN INTO SOUTH CENTRAL KENTUCKY TO JUST NORTH OF CELINA.
POSITION BASED LARGELY ON SURFACE BASED LI'S OFF MSAS. DOPPLER
SHOWING A FEW STORMS WORKING SOUTHEASTWARD THROUGH THE NASHVILLE
AREA PRESENTLY.

MODELS WORK SHORT WAVE ACROSS MID STATE THIS EVENING WITH GOOD NVA
PUNCHING IN BY 06Z. AIR MASS OVER MIDDLE TENNESSEE BEGINS TO DRY FROM
THE WEST AFTER 06Z TONIGHT BUT INCREASES AGAIN AFTER 12Z MON.
INITIAL DRYING IN RESPONSE TO SUBSIDENCE UNDERNEATH UPPER RIDGE AS
IT WORKS EASTWARD LATER TONIGHT AND SHORT WAVE PULLS EAST.

WILL GO BASICALLY WITH SCATTERED SHOWERS AND THUNDERSTORMS IN MIDDLE
TENNESSEE TONIGHT WITH 30 POP ACROSS THE NORTH/40 POP NORTHEAST
MIDDLE AND ON THE PLATEAU WITH A 20 POP ACROSS THE SOUTH. WITH DRIER
AIR WORKING IN FOR SUNDAY WILL GO WITH ISOLATED AFTERNOON AND EVENING
THUNDERSTORMS.

12Z 08/05/00

                      BNA
STABILITY
VIL OF THE DAY        55
500 MB TEMP:         -7.9
400 MB TEMP:         -19.5

SHOWALTER-INDEX       00
TROPOPAUSE (MB)       112

JJ GEORGES K-INDEX    24

MILLERS TOTAL TOTALS  47
     VERTICAL TOTALS  24
        CROSS TOTALS  23

          700MB TEMP  5.8
          700MB WIND  335/23

MEAN WIND (DEGS/KTS)
SURFACE TO  5000 FT   250/07
5000 FT TO 10000 FT   315/19

PRELIMINARY NUMBERS:
NASHVILLE  73 93 73 92  3113
CROSSVILLE 67 86 68 86  4223

THANKS TO LOUISVILLE FOR COORDINATION.

.BNA...NONE.
BOYD
01

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 11:40 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Montgomery	35 min
Aug 5, 12:55 PM CDT	Severe Thunderstorm Warning	OHX	Rutherford, Williamson	35 min
Aug 5, 2:18 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Sumner, Trousdale	27 min
Aug 5, 2:45 PM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Wilson	30 min
Aug 5, 3:22 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Grundy, Warren	23 min
Aug 5, 5:29 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland	41 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.