Alert archive / Tennessee / Snow Advisories in 2008

Snow Advisory 3, NWS Morristown, TN

February 26, 200818 counties in Tennessee; 7 counties in Virginia

NWS Morristown, TN issued this snow advisory at Feb 26, 2008, 3:10 AM CST for 18 counties in Tennessee; 7 counties in Virginia. It took effect at Feb 26, 2008, 3:30 PM CST. It was in force for 29 hr.

The area

The counties it named.

The facts

Issued: Feb 26, 2008, 3:10 AM CST (09:10 UTC)
In effect from: Feb 26, 2008, 3:30 PM CST
Expired: Feb 27, 2008, 8:46 PM CST
In force: 29 hr
Issued by: NWS Morristown, TN

All 25 counties

Bledsoe County, TN, Blount County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Greene County, TN, Hancock County, TN, Hawkins County, TN, Johnson County, TN, Marion County, TN, Morgan County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Sullivan County, TN, Unicoi 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), 20 km from the middle of the area, began a volume at 09:12 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, 9.2 hours before the alert went out and 301 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: 1738 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 288 m²/s²
0-3 km storm-relative helicity: 277 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 snow advisory 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 snow advisory went out at Feb 25, 8:00 PM CST, 7 hours 10 minutes earlier.

Area forecast discussion, Feb 25, 8:00 PM CST, 7 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 26, 3:10 AM CST	Heavy Snow Warning	MRX	Blount, Carter, Cocke, Greene, Johnson, Sevier and 1 more	35 hr

Nearby

Snow Advisories in Tennessee, 2008 Snow Advisories in Virginia, 2008 Every snow advisory in 2008

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.