Alert archive / Tennessee / High Wind Watches in 2009

High Wind Watch 1, NWS Morristown, TN

February 10, 200916 counties in Tennessee; Wise County, City of Norton, Virginia; Cherokee County, Clay County, North Carolina

NWS Morristown, TN issued this high wind watch at Feb 10, 2009, 10:45 AM CST for 16 counties in Tennessee; Wise County, City of Norton, Virginia; Cherokee County, Clay County, North Carolina. It took effect at Feb 11, 2009, 2:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 10, 2009, 10:45 AM CST (16:45 UTC)
In effect from: Feb 11, 2009, 2:00 AM CST
Expired: Feb 10, 2009, 1:56 PM CST
In force
Issued by: NWS Morristown, TN

Counties Cherokee County, NC, Clay County, NC, Bledsoe County, TN, Blount County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Greene 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, Unicoi County, TN, City of Norton, VA, Wise County, VA

The radar

The Knoxville radar (KMRX), 40 km from the middle of the area, began a volume at 16:51 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, 4.8 hours before the alert went out and 258 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: 1584 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 377 m²/s²
0-3 km storm-relative helicity: 356 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 high wind 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 high wind watch went out at Feb 10, 10:30 AM CST, 15 minutes earlier.

Area forecast discussion, Feb 10, 10:30 AM CST, 15 minutes before

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Hazardous weather outlook, Feb 10, 4:00 AM CST, 6 hours 45 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 10, 1:56 PM CST	High Wind Warning	MRX	Bledsoe, Blount, Campbell, Carter, Claiborne, Cocke and 10 more	36 hr
Feb 10, 1:56 PM CST	Wind Advisory	MRX	Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more	45 hr

Nearby

High Wind Watches in Tennessee, 2009 High Wind Watches in Virginia, 2009 High Wind Watches in North Carolina, 2009 Every high wind watch in 2009

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.