Alert archive / Tennessee / Wind Chill Watches in 2015

Wind Chill Watch 2, NWS Morristown, TN

February 17, 201525 counties in Tennessee; 7 counties in Virginia; Cherokee County, Clay County, North Carolina

NWS Morristown, TN issued this wind chill watch at Feb 17, 2015, 3:27 PM EST for 25 counties in Tennessee; 7 counties in Virginia; Cherokee County, Clay County, North Carolina. It took effect at Feb 18, 2015, 7:00 PM EST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 17, 2015, 3:27 PM EST (20:27 UTC)
In effect from: Feb 18, 2015, 7:00 PM EST
Expired: Feb 18, 2015, 4:02 PM EST
In force
Issued by: NWS Morristown, TN

All 34 counties

Cherokee County, NC, Clay County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Marion County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington County, TN, City of Bristol, VA, City of Norton, VA, Lee County, VA, Russell County, VA, Scott County, VA, Washington County, VA, Wise County, VA

The radar

The Knoxville radar (KMRX), 2 km from the middle of the area, began a volume at 20:24 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.5 hours before the alert went out and 316 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: 610 m above ground
0-6 km bulk shear: 113 kt
0-1 km storm-relative helicity: -248 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind chill watch 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 wind chill watch went out at Feb 17, 12:36 PM EST, 2 hours 51 minutes earlier.

Area forecast discussion, Feb 17, 12:36 PM EST, 2 hours 51 minutes before

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Hazardous weather outlook, Feb 17, 4:36 AM EST, 10 hours 51 minutes before

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In the hours before

Local storm report, Feb 17, 10:26 AM EST, 5 hours 1 minute before

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Special weather statement, Feb 17, 10:37 AM EST, 4 hours 50 minutes before

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Local storm report, Feb 17, 10:40 AM EST, 4 hours 47 minutes before

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Local storm report, Feb 17, 10:45 AM EST, 4 hours 42 minutes before

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Local storm report, Feb 17, 10:48 AM EST, 4 hours 39 minutes before

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Local storm report, Feb 17, 1:17 PM EST, 2 hours 10 minutes 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 17, 3:27 PM EST	Winter Weather Advisory	MRX	Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more	39 hr

Nearby

Wind Chill Watches in Tennessee, 2015 Wind Chill Watches in Virginia, 2015 Wind Chill Watches in North Carolina, 2015 Every wind chill watch in 2015

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.