Alert archive / Virginia / Freeze Warnings in 2011

Freeze Warning 1, NWS Morristown, TN

March 28, 20116 counties in Tennessee; 7 counties in Virginia

NWS Morristown, TN issued this freeze warning at Mar 28, 2011, 3:17 PM EDT for 6 counties in Tennessee; 7 counties in Virginia. It took effect at Mar 29, 2011, 2:00 AM EDT. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 28, 2011, 3:17 PM EDT (19:17 UTC)
In effect from: Mar 29, 2011, 2:00 AM EDT
Expired: Mar 29, 2011, 9:00 AM EDT
In force: 7 hr
Issued by: NWS Morristown, TN

Counties Carter County, TN, Greene County, TN, Hancock County, TN, Hawkins County, TN, Sullivan 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), 90 km from the middle of the area, began a volume at 19:21 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, 7.3 hours before the alert went out and 244 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: 530 m above ground
0-6 km bulk shear: 92 kt
0-1 km storm-relative helicity: 163 m²/s²
0-3 km storm-relative helicity: 375 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 freeze warning 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 freeze warning went out at Mar 27, 3:17 PM EDT, 24 hours earlier.

Area forecast discussion, Mar 27, 3:17 PM EDT, 24 hours 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
Mar 28, 3:17 PM EDT	Frost Advisory	MRX	Anderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 19 more	18 hr

Nearby

Freeze Warnings in Virginia, 2011 Freeze Warnings in Tennessee, 2011 Every freeze warning 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.