Alert archive / Tennessee / Special Weather Statements in 2017

Special Weather Statement, NWS Nashville, TN

April 17, 2017Dickson County, Tennessee

NWS Nashville, TN issued this special weather statement at Apr 17, 2017, 3:49 PM CDT for Dickson County, Tennessee. It was in force for 26 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 17, 2017, 3:49 PM CDT (20:49 UTC)
Expired: Apr 17, 2017, 4:15 PM CDT
In force: 26 min
Issued by: NWS Nashville, TN

County Dickson County, TN

The radar

The Nashville radar (KOHX), 63 km from the middle of the area, began a volume at 20:52 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, 8.8 hours before the alert went out and 54 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: 110 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 867 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 87 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 17, 9:40 AM CDT, 6 hours 9 minutes earlier.

Area forecast discussion, Apr 17, 9:40 AM CDT, 6 hours 9 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
940 AM CDT Mon Apr 17 2017

.UPDATE...
FOR MORNING DISCUSSION.

&&

.DISCUSSION...

Latest surface observations show a weak front/outflow boundary
has settled along a line from just south of Paris to south of
Dickson to between Smyrna and Murfreesboro to south of
Crossville. Radar imagery shows scattered showers and an
occasional thunderstorm continue to develop along and south of
this boundary this morning, with a loosely organized MCS along the
Mississippi River slowly moving towards our area. As atmosphere
heats up later this morning into the afternoon with daytime
heating, anticipate additional pulse to multicell type convection
will develop mainly along and south of the boundary, along with
activity spreading in from west TN - all of which is in line with
latest HRRR model runs. 12Z OHX sounding shows atmosphere is
moist and modestly unstable with weak deep layer shear and poor
lapse rates. Therefore not anticipating severe storms today due to
the relatively low instability and weak shear, but could see some
locally heavy rainfall in southern zones. Forecast has all of
this well covered and only made minor tweaks to grids/zones.

&&

.AVIATION...
12Z TAF DISCUSSION.

BNA/CKV/CSV...Surface boundary is situated across Middle Tennessee
this morning, with VLIFR conditions having developed at CKV.
Cluster of showers continues to move east across the mid state,
and is now affecting mainly the Cumberland Plateau and areas to
the immediate west this hour. Once these showers pass, look for
the remainder of the morning to remain dry most areas. HRRR shows
isolated showers popping up by 18Z, with a more organized line of
cells moving into Middle Tennessee from the west around 20Z.
Timing gets a bit sketchier as we head into evening, but expect
showers and maybe a few thunderstorms to linger past 00Z.

&&

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

&&

DISCUSSION......Shamburger
AVIATION........08

Hazardous weather outlook, Apr 17, 5:13 AM CDT, 10 hours 36 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
513 AM CDT Mon Apr 17 2017

TNZ005>011-023>034-056>066-075-077>080-093>095-181015-
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-
513 AM CDT Mon Apr 17 2017

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight

A few strong storms are possible, mainly during the afternoon.
Small hail and gusty winds are the main concerns.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

08

In the hours before

Special weather statement, Apr 17, 12:48 PM CDT, 3 hours 1 minute before

Special Weather Statement
National Weather Service Nashville TN
1248 PM CDT MON APR 17 2017

TNZ065-066-080-171815-
Cumberland TN-Van Buren TN-White TN-
1248 PM CDT MON APR 17 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CUMBERLAND...
NORTHERN VAN BUREN AND SOUTHEASTERN WHITE COUNTIES UNTIL 115 PM
CDT...

At 1248 PM CDT, Doppler radar was tracking a strong thunderstorm near
Spencer, moving east at 20 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Spencer, Virgin Falls State Natural Area, Indian Rock Lake and Fall
Creek Falls State Park.

LAT...LON 3577 8515 3576 8526 3572 8527 3567 8531
      3573 8555 3590 8548 3590 8509
TIME...MOT...LOC 1748Z 274DEG 18KT 3581 8541

Shamburger

Special weather statement, Apr 17, 1:11 PM CDT, 2 hours 38 minutes before

Special Weather Statement
National Weather Service Nashville TN
111 PM CDT MON APR 17 2017

TNZ025-171845-
Dickson TN-
111 PM CDT MON APR 17 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DICKSON COUNTY UNTIL
145 PM CDT...

At 111 PM CDT, Doppler radar was tracking a strong thunderstorm near
Tennessee City, moving east at 10 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Dickson, Burns and Charlotte.

LAT...LON 3600 8753 3617 8755 3618 8726 3597 8727
TIME...MOT...LOC 1811Z 279DEG 7KT 3608 8749

Shamburger

Special weather statement, Apr 17, 1:56 PM CDT, 1 hour 53 minutes before

Special Weather Statement
National Weather Service Nashville TN
156 PM CDT MON APR 17 2017

TNZ064-171930-
De Kalb TN-
156 PM CDT MON APR 17 2017

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL DE KALB COUNTY UNTIL
230 PM CDT...

At 156 PM CDT, Doppler radar was tracking a strong thunderstorm over
Smithville, moving east at 5 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Smithville.

LAT...LON 3602 8566 3601 8565 3601 8564 3597 8566
      3592 8566 3590 8565 3592 8588 3603 8587
TIME...MOT...LOC 1856Z 278DEG 5KT 3597 8579

Shamburger

Special weather statement, Apr 17, 2:21 PM CDT, 1 hour 28 minutes before

Special Weather Statement
National Weather Service Nashville TN
221 PM CDT MON APR 17 2017

TNZ032-064-171945-
Putnam TN-De Kalb TN-
221 PM CDT MON APR 17 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DE KALB AND
SOUTHWESTERN PUTNAM COUNTIES UNTIL 245 PM CDT...

At 221 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Smithville, or over Center Hill Lake, moving east at
20 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Smithville, Baxter, Center Hill Lake and Edgar Evans State Park.

LAT...LON 3614 8560 3590 8569 3602 8592 3610 8589
      3609 8587 3611 8585 3612 8585 3612 8584
      3613 8584 3612 8583 3613 8581 3616 8580
TIME...MOT...LOC 1921Z 285DEG 16KT 3607 8581

Shamburger

Special weather statement, Apr 17, 3:24 PM CDT, 25 minutes before

Special Weather Statement
National Weather Service Nashville TN
324 PM CDT MON APR 17 2017

TNZ057-172100-
Hickman TN-
324 PM CDT MON APR 17 2017

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN HICKMAN COUNTY UNTIL 400
PM CDT...

At 323 PM CDT, Doppler radar was tracking a strong thunderstorm near
Centerville, moving east at 10 mph. Another strong thunderstorm was
located near Bon Aqua, moving east at 10 mph.

Half inch hail and winds in excess of 40 mph will be possible with
these storms

Locations impacted include...
Centerville, Primm Springs, Lyles and Nunnelly.

LAT...LON 3594 8747 3596 8721 3573 8723 3572 8727
      3570 8730 3566 8733 3566 8747
TIME...MOT...LOC 2023Z 268DEG 9KT 3579 8737

Shamburger

Special weather statement, Apr 17, 3:49 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Nashville TN
349 PM CDT MON APR 17 2017

TNZ025-026-057-059-172115-
Hickman TN-Williamson TN-Dickson TN-Cheatham TN-
349 PM CDT MON APR 17 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN DICKSON...
NORTHWESTERN WILLIAMSON...SOUTH CENTRAL CHEATHAM AND NORTHEASTERN
HICKMAN COUNTIES UNTIL 415 PM CDT...

At 348 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Burns, or 11 miles southeast of Dickson, moving
east at 10 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Dickson, Kingston Springs, Pegram, Burns, Fairview and Bon Aqua.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3588 8706 3589 8732 3603 8734 3611 8705
TIME...MOT...LOC 2048Z 249DEG 9KT 3598 8721

Shamburger

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 17, 12:38 PM CDT	Special Weather Statement	OHX	Rutherford	37 min
Apr 17, 12:48 PM CDT	Special Weather Statement	OHX	Van Buren	27 min
Apr 17, 1:11 PM CDT	Special Weather Statement	OHX	Dickson	34 min
Apr 17, 1:56 PM CDT	Special Weather Statement	OHX	DeKalb	34 min
Apr 17, 2:21 PM CDT	Special Weather Statement	OHX	DeKalb	24 min
Apr 17, 3:24 PM CDT	Special Weather Statement	OHX	Hickman	36 min
Apr 17, 3:58 PM CDT	Areal Flood Advisory	OHX	Hickman	2 hr
Apr 17, 4:34 PM CDT	Flash Flood Warning	OHX	Dickson, Hickman, Williamson	116 min
Apr 17, 5:27 PM CDT	Special Weather Statement	OHX	Cumberland	18 min
Apr 17, 6:01 PM CDT	Flash Flood Warning	OHX	Williamson	89 min
Apr 17, 6:21 PM CDT	Areal Flood Advisory	OHX	Rutherford	54 min
Apr 17, 6:29 PM CDT	Special Weather Statement	OHX	Cannon	31 min

Nearby

Special Weather Statements in Tennessee, 2017 Every special weather statement in 2017

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.