Alert archive / Tennessee / Special Weather Statements in 2017

Special Weather Statement, NWS Morristown, TN

February 8, 2017Campbell County, Morgan County, Scott County, Tennessee

NWS Morristown, TN issued this special weather statement at Feb 8, 2017, 7:49 PM EST for Campbell County, Morgan County, Scott County, Tennessee. It was in force for 41 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: Feb 8, 2017, 7:49 PM EST (00:49 UTC)
Expired: Feb 8, 2017, 8:30 PM EST
In force: 41 min
Issued by: NWS Morristown, TN

Counties Campbell County, TN, Morgan County, TN, Scott County, TN

The radar

The Knoxville radar (KMRX), 114 km from the middle of the area, began a volume at 00:53 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 00:00Z, 0.8 hours before the alert went out and 176 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: 3 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 466 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.6

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 Morristown, TN wrote its last area forecast discussion before this special weather statement went out at Feb 8, 6:24 PM EST, 1 hour 25 minutes earlier.

Area forecast discussion, Feb 8, 6:24 PM EST, 1 hour 25 minutes before

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Hazardous weather outlook, Feb 8, 2:39 PM EST, 5 hours 10 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
239 PM EST Wed Feb 8 2017

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-091945-
Cherokee-Clay-Scott TN-Campbell-Claiborne-Hancock-Hawkins-
Sullivan-Johnson-Morgan-Anderson-Union-Grainger-Hamblen-
Northwest Cocke-Cocke Smoky Mountains-Northwest Greene-
Southeast Greene-Washington TN-Unicoi-Northwest Carter-
Southeast Carter-Roane-Loudon-Knox-Jefferson-NW Blount-
Blount Smoky Mountains-North Sevier-Sevier Smoky Mountains-
Sequatchie-Bledsoe-Rhea-Meigs-McMinn-Northwest Monroe-
Southeast Monroe-Marion-Hamilton-Bradley-West Polk-East Polk-Lee-
Wise-Scott-Russell-Washington-
239 PM EST Wed Feb 8 2017 /139 PM CST Wed Feb 8 2017/

This Hazardous Weather Outlook is for portions of Southwest North
Carolina...East Tennessee and Southwest Virginia.

.DAY ONE...This Afternoon and Tonight

A cold front will swing through the area tonight. Scattered
strong to severe thunderstorms will be possible ahead of the front
this evening. Some of these storms may be strong to severe, with
large hail and damaging winds being the primary threat. A brief,
isolated tornado cannot be ruled out.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Much colder air will push in behind the front, with snow showers
expected over the higher elevations later Wednesday night into
Thursday. Some light snow accumulations will be possible in these
higher elevation areas.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon or evening.

In the hours before

Special weather statement, Feb 8, 5:23 PM EST, 2 hours 26 minutes before

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Local storm report, Feb 8, 5:52 PM EST, 1 hour 57 minutes before

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Special weather statement, Feb 8, 5:52 PM EST, 1 hour 57 minutes before

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Local storm report, Feb 8, 6:08 PM EST, 1 hour 41 minutes before

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Special weather statement, Feb 8, 6:14 PM EST, 1 hour 35 minutes before

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Special weather statement, Feb 8, 6:49 PM EST, 1 hour before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 8, 7:11 PM EST	Special Weather Statement	MRX	Hancock, Hawkins	49 min
Feb 8, 7:38 PM EST	Special Weather Statement	MRX	Campbell	52 min
Feb 8, 7:52 PM EST	Special Weather Statement	MRX	Sullivan	38 min
Feb 8, 7:57 PM EST	Special Weather Statement	MRX	Bledsoe, Hamilton, Marion, Meigs, Rhea, Sequatchie	63 min
Feb 8, 8:16 PM EST	Special Weather Statement	MRX	Union	44 min
Feb 8, 8:36 PM EST	Special Weather Statement	MRX	Johnson	39 min
Feb 8, 8:41 PM EST	Special Weather Statement	MRX	Grainger, Hamblen	49 min
Feb 8, 8:43 PM EST	Special Weather Statement	MRX	Johnson, Sullivan	47 min
Feb 8, 8:55 PM EST	Special Weather Statement	MRX	Bradley, Hamilton, McMinn, Polk	50 min
Feb 8, 9:02 PM EST	Special Weather Statement	MRX	Grainger, Union	43 min
Feb 8, 9:33 PM EST	Special Weather Statement	MRX	Blount, Greene, Hamblen, Hawkins, Jefferson, Knox and 4 more	42 min
Feb 9, 3:30 PM EST	Wind Advisory	MRX	Blount, Cocke, Sevier	40 hr
Feb 8, 9:06 PM EST	Special Weather Statement	MRX	Scott, City of Bristol	39 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.