Alert archive / Tennessee / Frost Advisories in 2011

Frost Advisory 6, NWS Morristown, TN

October 2, 201113 counties in Tennessee; 7 counties in Virginia; Cherokee County, Clay County, North Carolina

NWS Morristown, TN issued this frost advisory at Oct 2, 2011, 3:04 PM EDT for 13 counties in Tennessee; 7 counties in Virginia; Cherokee County, Clay County, North Carolina. It took effect at Oct 3, 2011, 3:00 AM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Oct 2, 2011, 3:04 PM EDT (19:04 UTC)
In effect from: Oct 3, 2011, 3:00 AM EDT
Expired: Oct 3, 2011, 10:00 AM EDT
In force: 7 hr
Issued by: NWS Morristown, TN

All 22 counties

Cherokee County, NC, Clay County, NC, Blount County, TN, Carter County, TN, Cocke County, TN, Greene County, TN, Hancock County, TN, Hawkins County, TN, Johnson County, TN, Monroe County, TN, Polk 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), 42 km from the middle of the area, began a volume at 19:10 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, 7.1 hours before the alert went out and 329 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: 1090 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 63 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 frost 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 frost advisory went out at Oct 1, 7:25 PM EDT, 19 hours 39 minutes earlier.

Area forecast discussion, Oct 1, 7:25 PM EDT, 19 hours 39 minutes before

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Nearby

Frost Advisories in Tennessee, 2011 Frost Advisories in Virginia, 2011 Frost Advisories in North Carolina, 2011 Every frost advisory in 2011

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.