Alert archive / Tennessee / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 250, NWS Nashville, TN

June 15, 20116 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jun 15, 2011, 2:10 PM CDT for 6 counties in Tennessee. It was in force for 65 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 15, 2011, 2:10 PM CDT (19:10 UTC)
Expired: Jun 15, 2011, 3:15 PM CDT
In force: 65 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Cannon County, TN, Cumberland County, TN, DeKalb County, TN, Van Buren County, TN, Warren County, TN, White County, TN

The radar

The Northeast Alabama radar (KHTX), 133 km from the middle of the area, began a volume at 19:12 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
Jun 15, 2:16 PM CDT	HAIL 1	6 W Crossville, TN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 6 minutes after it went out.

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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.2 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: 227 J/kg
Mixed-layer CIN: -377 J/kg
Mixed-layer LCL: 1521 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

504 
WUUS54 KOHX 151910
SVROHX
TNC015-035-041-175-177-185-152015-
/O.NEW.KOHX.SV.W.0250.110615T1910Z-110615T2015Z/

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

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN WARREN COUNTY IN MIDDLE TENNESSEE...
  EAST CENTRAL CANNON COUNTY IN MIDDLE TENNESSEE...
  WHITE COUNTY IN MIDDLE TENNESSEE...
  SOUTHERN DEKALB COUNTY IN MIDDLE TENNESSEE...
  CUMBERLAND COUNTY IN MIDDLE TENNESSEE...
  NORTHERN VAN BUREN COUNTY IN MIDDLE TENNESSEE...

* UNTIL 315 PM CDT

* AT 207 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SEVERAL
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORMS WILL MOVE EASTWARD 
  ACROSS THE WARNED AREA AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MCMINNVILLE...
  SPARTA...
  CROSSVILLE...

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 3582 8476 3583 8480 3577 8491 3575 8502
      3577 8504 3577 8522 3576 8525 3572 8526
      3569 8530 3564 8594 3592 8596 3604 8476
      3598 8470 3592 8467
TIME...MOT...LOC 1908Z 260DEG 32KT 3581 8587

$$

FORECASTER:BOYD

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, 11:12 AM CDT, 2 hours 58 minutes earlier.

Area forecast discussion, Jun 15, 11:12 AM CDT, 2 hours 58 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1112 AM CDT WED JUN 15 2011

.UPDATE...
ML/UL RIDGING ACROSS THE AREA THIS MORNING MOVING EAST AS WEAK
TROUGH AXIS PUSHES IN BEHIND. WARM FRONT CURRENTLY SHOWING UP
JUST SOUTHWEST ALSO EXPECTED TO MOVE ACROSS THE AREA AS WELL.
INCREASING INSTABILITY AND DEEPER MOISTURE ASSOCIATED COMBINING TO
KEEP CONVECTION GOING...AND THAT WILL CONTINUE INTO THE EARLY
EVENING. SOME OF THESE STORMS ALSO EXPECTED TO BECOME STRONG TO
SEVERE. CURRENT FORECAST TRENDS IN LINE SO WILL NEED ONLY TO MAKE
A FEW MINOR ADJUSTMENTS AT THIS TIME.

&&

.PREV DISCUSSION... /ISSUED 634 AM CDT WED JUN 15 2011/

UPDATE...FOR 12Z TAFS.

AVIATION...
COMBINATION OF H5 S/W TROF DROPPING SE OVR THE AREA AND INCREASE
IN DEWPTS/TEMPS EXPECTED TO GET AREA OF RW/TRW STARTED AROUND NOON.
WL TEMPO MVFR COND W/TSRA 18Z-22Z KBNA AND 20Z-24Z KCSV. MVFR FG
KCSV LATE TNGT.

PREV DISCUSSION... /ISSUED 314 AM CDT WED JUN 15 2011/

DISCUSSION...UPPER TROUGH OVER THE PLAINS IS EXPECTED TO ROTATE EWD
THROUGH THE OH/TN VALLEY TODAY. LOCAL WRF MODEL SHOWS SIGNIFICANT
INCREASES IN INSTABILITY...B+...PRECIPITABLE WATER. IT ALSO SHOWS
A 500MB JET DEVELOPING OVER THE AREA BY 18Z AND MOVING EWD ACROSS
THE MIDSTATE THIS AFTERNOON. THUS IT APPEARS THAT ALL OF THE
INGREDIENTS ARE COMING TOGETHER FOR A FEW SVR STORMS...MAINLY THIS
AFTERNOON. SPC HAS OUTLOOKED A SLIGHT RISK SVR FOR TODAY WITH
DAMAGING WIND AND HAIL THE PRIMARY THREAT. CONVECTION TAPERS OFF
THIS EVENING AS DRIER AIR MOVES INTO THE AREA.

NO COOLING AT THE SFC UNFORTUNATELY AS HIGH TEMPS BUMP UP AGAINST
THE 90 MARK TOMORROW. UPPER RIDGE BUILDS BACK OVER THE AREA BY
SAT. AS THIS UPPER RIDGE BUILDS IN OVER THE SERN STATES THE NEXT
UPPER TROUGH MOVES INTO THE PLAINS BY MON WITH A WELL DEFINED SFC
LOW SETTING UP OVER THE PLAINS BY FRI. THE ASSOCIATED WARM FRONT
EXTENDS FROM THE KANSAS LOW SEWD ACROSS THE DEEP SOUTH ON FRI AM.
THE WARM FRONT MOVES NWD TO AN IOWA TO WEST VIRGINIA LINE BY MON
AM. THIS FEATURE WILL ALSO HELP TO KICK OFF CONVECTION OVER THE
AREA DURING THE FRI-SUN PERIOD.

SIGNIFICANT AMOUNTS OF DRY AIR AT ALL LEVELS GET PUMPED NEWD OUT
OF THE LOWER PLAINS BEHIND THE WARM FRONT SUCH THAT CHANCES OF
CONVECTION SEEMED TOO LOW TO MENTION ON MON AND TUE.

THE UPPER TROUGH OVER THE PLAINS FINALLY MOVES EWD ENOUGH TO SPARK
CONVECTION FOR TUE NGT AND WED.

&&

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

07

Hazardous weather outlook, Jun 15, 5:27 AM CDT, 8 hours 43 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, 12:36 PM CDT, 1 hour 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1236 PM CDT WED JUN 15 2011

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

1212 PM     HAIL             MOUNT JULIET            36.21N 86.52W
06/15/2011  E0.25 INCH       WILSON             TN   PUBLIC

&&

TBOUCHER

Local storm report, Jun 15, 12:44 PM CDT, 1 hour 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1244 PM CDT WED JUN 15 2011

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

1221 PM     HAIL             NASHVILLE               36.17N 86.78W
06/15/2011  E0.50 INCH       DAVIDSON           TN   PUBLIC

&&

TBOUCHER

Local storm report, Jun 15, 12:52 PM CDT, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1252 PM CDT WED JUN 15 2011

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

1227 PM     HAIL             LA VERGNE               36.00N 86.57W
06/15/2011  E0.25 INCH       RUTHERFORD         TN   PUBLIC

&&

TBOUCHER

Local storm report, Jun 15, 1:02 PM CDT, 1 hour 8 minutes before

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

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

1251 PM     HAIL             LEBANON                 36.21N 86.32W
06/15/2011  E0.50 INCH       WILSON             TN   EMERGENCY MNGR

            DIME SIZED HAIL AT HWY 109 AND I-40.

&&

TBOUCHER

Local storm report, Jun 15, 1:25 PM CDT, 45 minutes before

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

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

0115 PM     TSTM WND GST     8 SE NASHVILLE          36.09N 86.68W
06/15/2011  E60 MPH          DAVIDSON           TN   TRAINED SPOTTER

            SPOTTER BELIEVED WINDS CAUSED BY WET MICROBURST.

&&

BBOYD

Local storm report, Jun 15, 2:01 PM CDT, 9 minutes before

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

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

0155 PM     HAIL             2 S DOVER               36.45N 87.84W
06/15/2011  E1.00 INCH       STEWART            TN   FIRE DEPT/RESCUE

            HAIL WAS OBSERVED ON LICK CREEK ROAD

&&

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, 2:27 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, 5:23 PM CDT	Severe Thunderstorm Warning	OHX	Williamson	37 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.