Alert archive / Tennessee / Special Weather Statements in 2017

Special Weather Statement, NWS Nashville, TN

April 30, 2017Cumberland County, Fentress County, Tennessee

NWS Nashville, TN issued this special weather statement at Apr 30, 2017, 5:28 PM CDT for Cumberland County, Fentress County, Tennessee. It was in force for 62 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 30, 2017, 5:28 PM CDT (22:28 UTC)
Expired: Apr 30, 2017, 6:30 PM CDT
In force: 62 min
Issued by: NWS Nashville, TN

Counties Cumberland County, TN, Fentress County, TN

The radar

The Knoxville radar (KMRX), 142 km from the middle of the area, began a volume at 22:30 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, 10.5 hours before the alert went out and 146 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: 329 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 815 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 231 m²/s²
0-3 km storm-relative helicity: 284 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.0

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 30, 5:17 PM CDT, 11 minutes earlier.

Area forecast discussion, Apr 30, 5:17 PM CDT, 11 minutes before

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Hazardous weather outlook, Apr 30, 5:03 AM CDT, 12 hours 25 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
503 AM CDT Sun Apr 30 2017

TNZ005>011-023>034-056>066-075-077>080-093>095-011015-
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-
503 AM CDT Sun Apr 30 2017

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight
Widespread thunderstorms are expected to move across middle
Tennessee this afternoon and evening. Some storms may be strong to
severe...with damaging winds...hail...and a possible tornado...especially
west of interstate 65. Storms could also contain heavy
rainfall...especially across southern middle Tennessee with the
additional threat of isolated flash flooding.

In addition to thunderstorms, the front will bring strong gusty
winds. A wind advisory is valid for locations outside of the
plateau from 10 am until 10 pm. Winds gusts to 40 mph will be
possible.

.DAYS TWO THROUGH SEVEN...Monday through Saturday
No hazardous weather expected at this time.

.SPOTTER INFORMATION STATEMENT...
Spotter activation may be needed this afternoon and tonight.

Spotter Thunderstorm Reporting Criteria
Tornado
Funnel Cloud
Flooding
Hail >= 1/2 inch
Winds > 50 MPH (Measured)
Structural Damage
Trees or Power Lines Down

In the hours before

Local storm report, Apr 30, 4:35 PM CDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE NASHVILLE TN
435 PM CDT SUN APR 30 2017

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

0241 PM     TSTM WND DMG     1 WSW FRANKLIN          35.92N  86.86W
04/30/2017                   WILLIAMSON         TN   TWITTER

            TSPOTTER PHOTO SHOWED A LARGE TREE UPROOTED IN
            PINKERTON PARK

&&

CORRECTED EVENT TIME

EVENT NUMBER OHX1700508

SHAMBURGER

Special weather statement, Apr 30, 4:46 PM CDT, 42 minutes before

Special Weather Statement
National Weather Service Nashville TN
446 PM CDT SUN APR 30 2017

TNZ010-031>033-302215-
Putnam TN-Overton TN-Clay TN-Jackson TN-
446 PM CDT SUN APR 30 2017

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL OVERTON...JACKSON...
SOUTH CENTRAL CLAY AND WESTERN PUTNAM COUNTIES UNTIL 515 PM CDT...

At 446 PM CDT, Doppler radar was tracking a strong thunderstorm near
Baxter, or 11 miles west of Cookeville, moving northeast at 50 mph.

Winds in excess of 30 mph will be possible with this storm.

Locations impacted include...
Cookeville, Livingston, Gainesboro, Baxter and Whitleyville.

A tornado watch remains in effect until 700 PM CDT for Middle
Tennessee.

LAT...LON 3635 8531 3604 8567 3607 8569 3608 8571
      3617 8579 3618 8579 3617 8580 3620 8580
      3621 8581 3621 8579 3622 8578 3625 8579
      3653 8566
TIME...MOT...LOC 2146Z 214DEG 43KT 3617 8571

Whitehead

Special weather statement, Apr 30, 4:50 PM CDT, 38 minutes before

Special Weather Statement
National Weather Service Nashville TN
450 PM CDT SUN APR 30 2017

TNZ010-030-031-302230-
Clay TN-Jackson TN-Smith TN-
450 PM CDT SUN APR 30 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN SMITH...NORTHERN
JACKSON AND SOUTHWESTERN CLAY COUNTIES UNTIL 530 PM CDT...

At 450 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles west of Gainesboro, moving northeast at 35 mph.

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

Locations impacted include...
Gainesboro and Whitleyville.

A tornado watch remains in effect until 700 PM CDT for Middle
Tennessee.

LAT...LON 3644 8552 3627 8582 3636 8591 3642 8587
      3641 8583 3650 8581 3659 8575
TIME...MOT...LOC 2150Z 237DEG 30KT 3636 8581

Whitehead

Local storm report, Apr 30, 5:15 PM CDT, 13 minutes before

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Special weather statement, Apr 30, 5:26 PM CDT, 2 minutes before

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Special weather statement, Apr 30, 5:28 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 29, 7:26 PM CDT	Special Weather Statement	OHX	Putnam, White	34 min
Apr 29, 7:35 PM CDT	Special Weather Statement	OHX	DeKalb	25 min
Apr 29, 7:52 PM CDT	Special Weather Statement	OHX	Clay, Jackson, Overton	38 min
Apr 29, 7:56 PM CDT	Special Weather Statement	OHX	DeKalb, Jackson, Smith	49 min
Apr 29, 8:08 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Overton	21 min
Apr 30, 2:12 AM CDT	Wind Advisory	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Davidson and 23 more	19 hr
Apr 30, 1:29 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	31 min
Apr 30, 2:13 PM CDT	Severe Thunderstorm Warning	OHX	Maury	32 min
Apr 30, 2:18 PM CDT	Special Weather Statement	OHX	Williamson	27 min
Apr 30, 2:28 PM CDT	Special Weather Statement	OHX	Giles, Marshall	47 min
Apr 30, 2:28 PM CDT	Severe Thunderstorm Warning	OHX	Maury, Williamson	32 min
Apr 30, 2:39 PM CDT	Special Weather Statement	OHX	Davidson	51 min
Apr 30, 2:42 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Marshall, Maury	20 min
Apr 30, 2:48 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson	27 min
Apr 30, 3:01 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Marshall	29 min
Apr 30, 3:04 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Wilson	26 min
Apr 30, 3:14 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson, Wilson	31 min
Apr 30, 3:26 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Rutherford	34 min
Apr 30, 3:29 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Sumner, Trousdale	31 min
Apr 30, 3:43 PM CDT	Special Weather Statement	OHX	Wilson	32 min
Apr 30, 3:56 PM CDT	Special Weather Statement	OHX	Cannon, Coffee, DeKalb, Grundy, Warren	49 min
Apr 30, 4:11 PM CDT	Severe Thunderstorm Warning	OHX	Grundy	49 min
Apr 30, 4:28 PM CDT	Special Weather Statement	OHX	DeKalb, Putnam, Van Buren, Warren, White	62 min
Apr 30, 4:46 PM CDT	Special Weather Statement	OHX	Jackson	29 min
Apr 30, 4:50 PM CDT	Special Weather Statement	OHX	Jackson	40 min
Apr 30, 4:57 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Overton, Putnam	33 min
Apr 30, 5:07 PM CDT	Severe Thunderstorm Warning	OHX	Clay	23 min
Apr 30, 5:26 PM CDT	Special Weather Statement	OHX	Overton, Pickett	49 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.