Alert archive / Tennessee / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 271, NWS Nashville, TN

June 15, 2011Williamson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jun 15, 2011, 5:23 PM CDT for Williamson County, Tennessee. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 15, 2011, 5:23 PM CDT (22:23 UTC)
Expired: Jun 15, 2011, 6:00 PM CDT
In force: 37 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

County Williamson County, TN

The radar

The Nashville radar (KOHX), 69 km from the middle of the area, began a volume at 22:25 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 15, 11:52 AM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 10.4 hours before the alert went out and 277 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: 2133 J/kg
Mixed-layer CIN: -194 J/kg
Mixed-layer LCL: 1365 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 206 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.

458 
WUUS54 KOHX 152223
SVROHX
TNC187-152300-
/O.NEW.KOHX.SV.W.0271.110615T2223Z-110615T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
523 PM CDT WED JUN 15 2011

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME WEST CENTRAL WILLIAMSON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 600 PM CDT

* AT 523 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH. THE STORM WAS NEAR FAIRVIEW...MOVING SOUTHEAST AT 35
  MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE IMPACT MAINLY RURAL AREAS OF
  THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2. DO NOT
STAY OUTDOORS IF YOU ARE IN THE PATH OF SEVERE THUNDERSTORMS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM WEDNESDAY
EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3590 8711 3585 8719 3586 8721 3587 8721
      3589 8721 3590 8720
TIME...MOT...LOC 2223Z 295DEG 32KT 3591 8722

$$

FORECASTER: 31

1 follow-up statement

798 
WWUS54 KOHX 152252
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
552 PM CDT WED JUN 15 2011

TNC187-152302-
/O.EXP.KOHX.SV.W.0271.000000T0000Z-110615T2300Z/
WILLIAMSON TN-
552 PM CDT WED JUN 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME WEST CENTRAL
WILLIAMSON COUNTY WILL EXPIRE AT 600 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 3590 8711 3585 8719 3586 8721 3587 8721
      3589 8721 3590 8720
TIME...MOT...LOC 2252Z 295DEG 32KT 3580 8693

$$
31

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 15, 3:48 PM CDT, 1 hour 35 minutes earlier.

Area forecast discussion, Jun 15, 3:48 PM CDT, 1 hour 35 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
348 PM CDT WED JUN 15 2011

.DISCUSSION...
WATER VAPOR IMAGERY SHOWING WEAK UL TROUGH WORKING INTO THE REGION.
AT THE SFC/LLS...WARM FRONT CONTINUES TO MOVE ACROSS THE MID-STATE...
WHICH IS NOW JUST EAST OF BNA. GOOD INSTABILITY AND DECENT LL/ML
FLOW MIXED IN FUELING ONGOING THUNDERSTORM DEVELOPMENT. OVERALL...
STORMS PRODUCING AT OR BELOW 1 INCH HAIL...WITH WIND GUSTS BELOW
50KT.

WEAK ML/UL TROUGH AND TRAILING COLD FRONT EXPECTED TO PUSH ACROSS
LATER TONIGHT...WHICH WILL KEEP STRONG TO POSSIBLY ISOLATED SEVERE
STORMS GOING WELL INTO THE EVENING AS GOOD INSTABILITY REMAINS
AHEAD OF THESE FEATURES. LARGE HAIL LOOKS TO CONTINUE TO BE THE MAIN
THREAT NORTH BUT THINGS HAVE WARMED BIGTIME ACROSS THE SOUTH...BREAKING
INVERSION. WIND DAMAGE BECOMING INCREASINGLY POSSIBLE.

ML/UL TROUGH AXIS WILL MOVE BY ON THURSDAY SETTING UP ANOTHER NORTHWEST
FLOW REGIME ALOFT. AIRMASS WILL DRY SOME THURSDAY BUT CONVECTION DEVELOPING
UPSTREAM THURSDAY NIGHT MAY AGAIN RIDE DOWN OVER THE CWA EARLY FRIDAY...
BUT THEN BUILDING RIDGE WILL CUT INTO CONVECTION THROUGHOUT THE DAY.
THUS STORMS LIKELY TO BE ISO-SCT AT BEST.

ML/UL RIDGE AXIS GENERALLY HOLDS ACROSS THE MS RIVER THRU THE WEEKEND
WHICH WILL LIMIT CONVECTION AND BRING ANOTHER HEAT WAVE TO THE AREA.
ANY CONVECTION WILL BE VERY ISO AND TEMPS LIKELY TO CLIMB AS HIGH AS
THE MID-UPR 90S. THESE TYPES OF CONDITIONS WILL CONTINUE INTO THE FIRST
PART OF NEXT WEEK.

BY WEDNESDAY...A BETTER CHANCE FOR PCPN AND SLIGHTLY COOLER TEMPS ARE
ON TAP AS A ML/UL TROUGH APPROACHES.

&&

.PRELIMINARY POINT TEMPS/POPS...
NASHVILLE      66  91  69  92 /  30  05  20  30
CLARKSVILLE    65  90  69  91 /  10  05  20  30
CROSSVILLE     62  84  64  84 /  60  10  20  30
COLUMBIA       67  92  69  93 /  30  05  20  20
LAWRENCEBURG   67  92  69  93 /  50  05  20  20
WAVERLY        65  91  69  93 /  20  05  20  20

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

07

Hazardous weather outlook, Jun 15, 5:27 AM CDT, 11 hours 56 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
527 AM CDT WED JUN 15 2011

TNZ005>011-022>034-056>066-075-077>080-093>095-161030-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-BENTON-
HOUSTON-HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE-
SMITH-JACKSON-PUTNAM-OVERTON-FENTRESS-PERRY-HICKMAN-LEWIS-
WILLIAMSON-MAURY-MARSHALL-RUTHERFORD-CANNON-DE KALB-WHITE-
CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE-
GILES-
527 AM CDT WED JUN 15 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT...

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS MIDDLE
TENNESSEE TODAY.

MOISTURE WILL INCREASE ALONG A FRONTAL SYSTEM TODAY. AN ORGANIZED
AREA OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO DEVELOP IN MIDDLE
TENNESSEE THIS AFTERNOON. SOME STORMS COULD BECOME SEVERE WITH
DAMAGING WINDS...LARGE HAIL POSSIBLE AND FREQUENT LIGHTNING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

A WARM FRONT WILL MOVE NORTH ACROSS THE REGION FRIDAY. WARM AND
UNSTABLE CONDITIONS COULD GENERATE ISOLATED SEVERE THUNDERSTORMS
ON FRIDAY.

.SPOTTER CALL TO ACTION STATEMENT...

REPORTS FROM TRAINED WEATHER SPOTTERS MAY BE NEEDED.

SPOTTER THUNDERSTORM REPORTING CRITERIA...
TORNADO
FUNNEL CLOUD
FLOODING
HAIL >= 1/2 INCH
WINDS > 50 MPH (MEASURED)
STRUCTURAL DAMAGE
TREES OR POWER LINES DOWN

04

In the hours before

Local storm report, Jun 15, 3:50 PM CDT, 1 hour 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
350 PM CDT WED JUN 15 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0315 PM     HAIL             4 S NASHVILLE           36.11N 86.78W
06/15/2011  M2.50 INCH       DAVIDSON           TN   TRAINED SPOTTER

            OBSERVED AT CRIEVE HALL IN NASHVILLE

&&

STEIGERWALDT

Local storm report, Jun 15, 4:37 PM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
437 PM CDT WED JUN 15 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0350 PM     TSTM WND DMG     7 NNW MURFREESBORO      35.95N 86.44W
06/15/2011                   RUTHERFORD         TN   LAW ENFORCEMENT

            TREES DOWN ACROSS MUCH OF NORTHWESTERN RUTHERFORD COUNTY.

&&

21

Local storm report, Jun 15, 4:43 PM CDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
443 PM CDT WED JUN 15 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0425 PM     HAIL             8 WSW COALMONT          35.29N 85.84W
06/15/2011  E1.00 INCH       GRUNDY             TN   TRAINED SPOTTER

            OBSERVED AT PELHAM

&&

STEIGERWALDT

Local storm report, Jun 15, 5:11 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
511 PM CDT WED JUN 15 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0505 PM     HAIL             NASHVILLE               36.17N 86.78W
06/15/2011  M2.00 INCH       DAVIDSON           TN   PUBLIC

            2 INCH HAIL AT MCCABE GOLF COURSE IN DOWNTOWN NASHVILLE.

&&

21

Local storm report, Jun 15, 5:15 PM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
515 PM CDT WED JUN 15 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0450 PM     HAIL             6 SW DICKSON            36.02N 87.45W
06/15/2011  E1.00 INCH       DICKSON            TN   TRAINED SPOTTER

0455 PM     HAIL             5 NE COLUMBIA           35.67N 86.99W
06/15/2011  E1.00 INCH       MAURY              TN   TRAINED SPOTTER

0502 PM     HAIL             4 SW DICKSON            36.04N 87.43W
06/15/2011  E1.00 INCH       DICKSON            TN   PUBLIC

0308 PM     TSTM WND DMG     ASHLAND CITY            36.28N 87.06W
06/15/2011                   CHEATHAM           TN   LAW ENFORCEMENT

            TREES DOWN ACROSS THE COUNTY.

&&

21

Local storm report, Jun 15, 5:20 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
520 PM CDT WED JUN 15 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0458 PM     HAIL             6 WSW NASHVILLE         36.14N 86.88W
06/15/2011  E1.00 INCH       DAVIDSON           TN   PUBLIC

            OBSERVED NEAR CHARLOTTE PIKE AND ANNEX DRIVE

&&

STEIGERWALDT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 10:03 AM CDT	Severe Thunderstorm Warning	OHX	Fentress, Jackson, Overton, Pickett, Putnam	57 min
Jun 15, 11:02 AM CDT	Severe Thunderstorm Warning	OHX	Jackson, Putnam, Smith	28 min
Jun 15, 11:06 AM CDT	Severe Thunderstorm Warning	OHX	Grundy	24 min
Jun 15, 11:42 AM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Putnam	63 min
Jun 15, 11:54 AM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	15 min
Jun 15, 11:59 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Sumner, Trousdale, Williamson, Wilson	61 min
Jun 15, 1:11 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, DeKalb, Rutherford, Smith, Williamson, Wilson	49 min
Jun 15, 1:58 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Davidson, DeKalb, Rutherford, Williamson, Wilson	62 min
Jun 15, 2:10 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Cumberland, DeKalb, Van Buren, Warren, White	65 min
Jun 15, 2:27 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Houston, Montgomery, Robertson, Stewart	33 min
Jun 15, 2:32 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Maury	28 min
Jun 15, 2:57 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Houston, Montgomery, Robertson	63 min
Jun 15, 3:02 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury	28 min
Jun 15, 3:06 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Sumner, Williamson, Wilson	54 min
Jun 15, 3:21 PM CDT	Severe Thunderstorm Warning	OHX	Grundy	19 min
Jun 15, 3:27 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Wilson	63 min
Jun 15, 3:48 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Lewis, Maury, Perry, Wayne	27 min
Jun 15, 3:59 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Maury, Williamson	16 min
Jun 15, 4:13 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	32 min
Jun 15, 4:16 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Maury	29 min
Jun 15, 4:24 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	36 min
Jun 15, 4:32 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Grundy	28 min
Jun 15, 4:44 PM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Van Buren, Warren, White	31 min
Jun 15, 4:46 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	29 min
Jun 15, 4:48 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lewis, Maury	13 min
Jun 15, 4:55 PM CDT	Severe Thunderstorm Warning	OHX	Davidson	35 min
Jun 15, 4:57 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Williamson	48 min
Jun 15, 4:59 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Grundy	31 min
Jun 15, 5:11 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury, Williamson	34 min
Jun 15, 5:26 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson	14 min
Jun 15, 5:43 PM CDT	Severe Thunderstorm Warning	OHX	Humphreys	32 min
Jun 15, 5:47 PM CDT	Flash Flood Warning	OHX	Dickson, Hickman, Humphreys, Williamson	3 hr
Jun 15, 5:50 PM CDT	Flash Flood Warning	OHX	Grundy	3 hr
Jun 15, 6:09 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	19 min
Jun 15, 6:46 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	18 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.