Alert archive / Tennessee / Special Weather Statements in 2016

Special Weather Statement, NWS Nashville, TN

April 6, 2016Davidson County, Maury County, Williamson County, Tennessee

NWS Nashville, TN issued this special weather statement at Apr 6, 2016, 4:37 PM CDT for Davidson County, Maury County, Williamson County, Tennessee. It was in force for 38 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: Apr 6, 2016, 4:37 PM CDT (21:37 UTC)
Expired: Apr 6, 2016, 5:15 PM CDT
In force: 38 min
Issued by: NWS Nashville, TN

Counties Davidson County, TN, Maury County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 37 km from the middle of the area, began a volume at 21:37 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.6 hours before the alert went out and 26 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2589 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 372 m²/s²
0-3 km storm-relative helicity: 431 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 6, 3:14 PM CDT, 1 hour 23 minutes earlier.

Area forecast discussion, Apr 6, 3:14 PM CDT, 1 hour 23 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
314 PM CDT WED APR 6 2016

.DISCUSSION...

FRONTAL BOUNDARY CURRENTLY POSITIONED ACROSS EASTERN AR. JUST IN
ADVANCE OF THIS FEATURE...WE SEE THE BETTER INSTABILITY AXIS AND THE
SHOWER AND TSTM ACTIVITY ROUGHLY ALONG THE MS RIVER. FURTHER
EAST...A SERIES OF PRE FRONTAL TROUGHS ARE HELPING TO INITIATE
SOME SHOWER ACTIVITY OVER THE MID STATE AND JUST TO THE WEST. THE
INSTABILITY AXIS TO OUR WEST WILL TRANSLATE EASTWARD AS THE FRONT
APPROACHES. HOWEVER...MODELS IN AGREEMENT WITH WEAKENING THE
INSTABILITY FROM 18Z TO 00Z. THUS...SEVERE WEATHER IS NOT LOOKING
LIKELY. ADDITIONALLY...MID LEVEL CAPES LOOK RATHER FLAT AND SO
EVEN SMALL HAIL POTENTIAL LOOKS MINIMAL.

OTW...WE HAVE THE WIND ADVISORY GOING UNTIL 7 PM THIS EVENING. WILL
GO AHEAD AND LET THAT RIDE BUT WE SHOULD SEE THE GRADIENT RELAX
OVERNIGHT.

AS FOR PRECIP AMOUNTS...COULD SEE GREATER TOTALS OF UP TO 1/2 INCH
ACROSS OUR PLATEAU WITH LESSER AMOUNTS WEST. THE REASON FOR THIS IS
BECAUSE THE BOUNDARY IS EXPECTED TO STRENGTHEN WITH TIME AS THE SFC
LOW OVER MICHIGAN STRENGTHENS AS IT MOVES EAST. 850 MB DIRECTIONAL
CONVERGENCE WILL AMP UP WITH TIME. POPS TONIGHT WILL INCLUDE LIKELY
TO CATEGORICAL VALUES. THE WIDESPREAD PRECIP SHOULD END ACROSS OUR
PLATEAU AROUND MIDNIGHT.

GOING FORWARD...UPPER TROUGH WILL DIG ACROSS THE U.S. OVER THE NEXT
SEVERAL DAYS. BACKSIDE UPPER TROUGH ENERGY WILL KEEP A CHANCE OF
MOSTLY LIGHT SHOWERS GOING FOR OUR AREA THROUGH FRIDAY. A CANADIAN
FRONT WILL PUSH THROUGH FRIDAY NIGHT AND KEEP OUR TEMPS BELOW
NORMAL. FREEZING TEMPS WILL BE POSSIBLE FRI NIGHT AND SAT NIGHT AS
WELL. STILL A LITTLE TO SOON FOR ANY FREEZE WATCH INCLUSION...BUT
ONE MAY BE ISSUED IN THE NEXT DAY OR TWO.

NEXT WEEK WILL FEATURE A WARMING TREND FOR THE EARLY PART OF THE
WEEK ALONG WITH A GOOD CHANCE OF SHOWERS AND THUNDERSTORMS ON
TUESDAY.

&&

.AVIATION...
18Z TAF DISCUSSION.

VFR FLIGHT CATEGORIES ARE EXPECTED FOR MOST OF THIS TAF CYCLE.
THERE WILL BE A COUPLE OF HOURS LATE THIS AFTERNOON/EARLY THIS
EVENING WHERE ALL 3 TERMINALS WILL EXPERIENCE SOME IFR TO MVFR
CONDITIONS AS A LINE OF SHOWERS/TS MOVES THROUGH THE MID-STATE BUT
FLIGHT CATEGORIES SHOULD REBOUND QUICKLY.

IT WILL CONTINUE TO BE VERY BREEZY WITH SOUTHERLY GUSTS OF 30-35
KTS THROUGH THE REMAINDER OF THE AFTERNOON AND INTO THE EARLY
EVENING HOURS DUE TO A TIGHTENED PRESSURE GRADIENT. WINDS WILL
RELAX A LITTLE OVERNIGHT BUT PICK UP AGAIN THURSDAY WITH GUSTS OF
20-25 KTS OUT OF THE WEST.

&&

.PRELIMINARY POINT TEMPS/POPS...
NASHVILLE      44  64  42  61  34 /  60  20  30  20   0
CLARKSVILLE    43  63  39  59  31 /  50  30  30  20   0
CROSSVILLE     42  56  37  53  30 /  80  30  40  30  10
COLUMBIA       43  64  42  60  34 /  60  20  20  10   0
LAWRENCEBURG   43  66  42  61  34 /  60  20  20  10   0
WAVERLY        43  64  41  60  33 /  50  20  20   0   0

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY UNTIL 7 PM CDT THIS EVENING FOR BEDFORD-CANNON-
CHEATHAM-CLAY-COFFEE-CUMBERLAND-DAVIDSON-DE KALB-DICKSON-
FENTRESS-GILES-GRUNDY-HICKMAN-HOUSTON-HUMPHREYS-JACKSON-LAWRENCE-
LEWIS-MACON-MARSHALL-MAURY-MONTGOMERY-OVERTON-PERRY-PICKETT-
PUTNAM-ROBERTSON-RUTHERFORD-SMITH-STEWART-SUMNER-TROUSDALE-VAN
BUREN-WARREN-WAYNE-WHITE-WILLIAMSON-WILSON.

&&

SHORT TERM/AVIATION........UNGER
LONG TERM..................21

Hazardous weather outlook, Apr 6, 11:05 AM CDT, 5 hours 32 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
1105 AM CDT WED APR 6 2016

TNZ005>011-023>034-056>066-075-077>080-093>095-071615-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-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-
1105 AM CDT WED APR 6 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF MIDDLE
TENNESSEE.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON
INTO THE EARLY EVENING HOURS ACROSS ALL OF MIDDLE TENNESSEE. THE
MAIN THREATS WILL BE DAMAGING STRAIGHT LINE WINDS AND SMALL HAIL.

A WIND ADVISORY IS IN EFFECT FOR ALL OF MIDDLE TENNESSEE TODAY.
STRONG SOUTH WINDS OF 15 TO 30 MPH WITH GUSTS AS HIGH AS 45 MPH
ARE EXPECTED THIS AFTERNOON AND EVENING. A FEW TREES LIMBS MAY BE
BLOWN DOWN AND ISOLATED POWER OUTAGES COULD OCCUR.

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

A LIGHT FREEZE IS POSSIBLE IN THE UPPER CUMBERLAND FRIDAY NIGHT...
AND A LIGHT FREEZE ALONG WITH WIDESPREAD FROST IS POSSIBLE ACROSS
MOST OF MIDDLE TENNESSEE SATURDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

27

In the hours before

Special weather statement, Apr 6, 4:37 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
437 PM CDT WED APR 6 2016

TNZ026-027-059-060-062-062215-
DAVIDSON TN-WILLIAMSON TN-RUTHERFORD TN-CHEATHAM TN-MAURY TN-
437 PM CDT WED APR 6 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN RUTHERFORD...
WILLIAMSON...MAURY...DAVIDSON AND SOUTHEASTERN CHEATHAM COUNTIES
UNTIL 515 PM CDT...

AT 436 PM CDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG
A LINE EXTENDING FROM 7 MILES SOUTHEAST OF BURNS TO MOUNT PLEASANT.
MOVEMENT WAS NORTHEAST AT 55 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THESE STORMS
AND LARGE TREE LIMBS MAY SUCCUMB TO THESE WINDS.

LOCATIONS IMPACTED INCLUDE...
MURFREESBORO...FRANKLIN...COLUMBIA...ASHLAND CITY...NASHVILLE...MADISON...
HENDERSONVILLE...SMYRNA...BRENTWOOD...LA VERGNE...SPRING HILL...MOUNT
JULIET...GOODLETTSVILLE...NOLENSVILLE...FOREST HILLS...MOUNT PLEASANT...
OAK HILL...BELLE MEADE...KINGSTON SPRINGS AND LAKEWOOD.

LAT...LON 3634 8672 3629 8664 3625 8664 3624 8659
      3611 8653 3611 8654 3595 8630 3570 8674
      3569 8680 3570 8681 3565 8682 3543 8720
      3543 8724 3572 8726 3573 8723 3597 8721
      3609 8717 3637 8685 3636 8679 3641 8675
TIME...MOT...LOC 2136Z 225DEG 65KT 3598 8721 3553 8718

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 8:15 PM CDT	Wind Advisory	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 32 more	23 hr
Apr 6, 5:04 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Trousdale, Wilson	41 min
Apr 6, 5:12 PM CDT	Special Weather Statement	OHX	Marshall, Rutherford, Sumner, Trousdale, Wilson	33 min
Apr 6, 5:37 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Smith, Sumner, Trousdale, Wilson	38 min
Apr 6, 5:42 PM CDT	Special Weather Statement	OHX	Cannon, DeKalb, Smith, Wilson	33 min
Apr 6, 6:10 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Overton, Smith	50 min
Apr 6, 6:11 PM CDT	Special Weather Statement	OHX	DeKalb, Putnam	34 min
Apr 6, 6:42 PM CDT	Special Weather Statement	OHX	Putnam, White	48 min
Apr 6, 6:50 PM CDT	Special Weather Statement	OHX	Fentress, Overton, Pickett	40 min

Nearby

Special Weather Statements in Tennessee, 2016 Every special weather statement in 2016

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.