Alert archive / Tennessee / Special Weather Statements in 2016

Special Weather Statement, NWS Nashville, TN

August 1, 2016Houston County, Tennessee

NWS Nashville, TN issued this special weather statement at Aug 1, 2016, 4:11 PM CDT for Houston County, Tennessee. It was in force for 49 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: Aug 1, 2016, 4:11 PM CDT (21:11 UTC)
Expired: Aug 1, 2016, 5:00 PM CDT
In force: 49 min
Issued by: NWS Nashville, TN

County Houston County, TN

The radar

The Ft Campbell radar (KHPX), 60 km from the middle of the area, began a volume at 21:11 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, 9.2 hours before the alert went out and 100 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: 1021 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 803 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 32 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 Aug 1, 2:50 PM CDT, 1 hour 21 minutes earlier.

Area forecast discussion, Aug 1, 2:50 PM CDT, 1 hour 21 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
250 PM CDT MON AUG 1 2016

.SHORT TERM...

It's another typically hot and muggy summer afternoon across the
Mid State, with temperatures ranging from the middle 80s to the
lower 90s. Most thunderstorms, as of 2 pm, were confined to the
northwest and northern Cumberland Plateau.

A shortwave will drop across the area tonight and keep at least a
small chance for thunderstorms running for Middle Tennessee. The
best chance will be across the north, where the atmospheric
moisture will be deepest.

Not much to say about the remainder of the short-term forecast,
through Friday, as we remain in a seasonably muggy and warm air
mass. Expect scattered mainly afternoon and evening thunderstorms
each day.

Upper level high pressure builds in from the lower and middle
Mississippi Valley by Thursday, with daytime highs creeping up a
degree or two each day. By Thursday afternoon, maximum heat index
values will be pushing to between 100 an 103 degrees in areas
west of the Cumberland Plateau.

.LONG TERM...

A shortwave sweeps from the upper Midwest into New England from
Thursday night into Saturday. This pushes a cold front southward
into the Ohio River Valley on Friday, which then pivots into a
northwest-to-southeast alignment along the eastern edge of the
upper level high.

By Sunday, a quasi-stationary front sets up from central Illinois
down to north-central Georgia, keeping Middle Tennessee in a warm
and muggy air mass. Since we'll end up south and west of the
frontal boundary, it doesn't look like any drier air will work
its way into our neck of the woods. As a result, we keep a chance
for thunderstorms running each day during the extended period,
from Friday through next Monday.

&&

.AVIATION...
18Z TAF DISCUSSION.

BNA/CKV/CSV...Convection is already beginning to fire across
Middle Tennessee. Earlier line of storms coming out of MO & IL
continues to build southward, so the best chance for storms this
afternoon will be north of I-40. Have staggered the TEMPO groups
for our 3 terminals for this west-to-east progression of storms
during the afternoon. Perhaps some light fog after 06Z at
CKV/CSV.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      73  92  74  93  75 /  30  30  10  30  20
Clarksville    73  90  73  91  74 /  30  40  10  30  20
Crossville     67  85  68  87  69 /  40  30  10  20  20
Columbia       73  90  72  93  73 /  30  40  10  30  20
Lawrenceburg   73  90  72  92  73 /  30  40  10  30  20
Waverly        73  90  73  92  74 /  30  50  10  30  10

&&

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

&&

DISCUSSION......19
AVIATION........01/Boyd

Hazardous weather outlook, Aug 1, 6:30 AM CDT, 9 hours 41 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
630 AM CDT MON AUG 1 2016

TNZ005>011-023>034-056>066-075-077>080-093>095-021130-
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-
630 AM CDT MON AUG 1 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF MIDDLE
TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

HURLEY

In the hours before

Special weather statement, Aug 1, 4:11 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
411 PM CDT MON AUG 1 2016

TNZ006-023>025-012200-
MONTGOMERY TN-DICKSON TN-HOUSTON TN-HUMPHREYS TN-
411 PM CDT MON AUG 1 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN DICKSON...HOUSTON...
SOUTHWESTERN MONTGOMERY AND NORTHEASTERN HUMPHREYS COUNTIES UNTIL 500
PM CDT...

AT 410 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
TENNESSEE RIDGE...OR NEAR ERIN...MOVING EAST AT 20 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
WAVERLY...ERIN...MCEWEN...TENNESSEE RIDGE...VANLEER...
CUMBERLAND CITY AND SLAYDEN.

LAT...LON 3633 8782 3633 8780 3634 8776 3636 8773
      3637 8772 3637 8759 3638 8759 3638 8737
      3601 8752 3617 8788
TIME...MOT...LOC 2110Z 286DEG 16KT 3624 8777

BARNWELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 4:38 PM CDT	Special Weather Statement	OHX	Dickson, Humphreys	52 min
Aug 1, 4:49 PM CDT	Special Weather Statement	OHX	Cheatham	41 min
Aug 1, 4:56 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	49 min
Aug 1, 4:58 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Montgomery	21 min
Aug 1, 5:09 PM CDT	Special Weather Statement	OHX	Cheatham, Dickson	51 min
Aug 1, 5:30 PM CDT	Severe Thunderstorm Warning	OHX	Hickman	30 min
Aug 1, 5:49 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Williamson	26 min
Aug 1, 5:51 PM CDT	Special Weather Statement	OHX	Hickman, Lewis, Perry	39 min
Aug 1, 5:54 PM CDT	Special Weather Statement	OHX	Cheatham, Davidson	51 min
Aug 1, 5:58 PM CDT	Special Weather Statement	OHX	Williamson	47 min
Aug 1, 6:11 PM CDT	Special Weather Statement	OHX	Robertson	49 min
Aug 1, 6:24 PM CDT	Special Weather Statement	OHX	Marshall, Maury	51 min
Aug 1, 6:30 PM CDT	Special Weather Statement	OHX	Rutherford, Williamson	45 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.