Alert archive / Tennessee / Freeze Watches in 2012

Freeze Watch 2, NWS Morristown, TN

April 10, 201233 counties in Tennessee; 7 counties in Virginia; Cherokee County, Clay County, North Carolina

NWS Morristown, TN issued this freeze watch at Apr 10, 2012, 8:49 PM EDT for 33 counties in Tennessee; 7 counties in Virginia; Cherokee County, Clay County, North Carolina. It took effect at Apr 12, 2012, 2:00 AM EDT. It was in force for .

The area

The counties it named.

The facts

Issued: Apr 10, 2012, 8:49 PM EDT (00:49 UTC)
In effect from: Apr 12, 2012, 2:00 AM EDT
Expired: Apr 11, 2012, 3:01 PM EDT
In force
Issued by: NWS Morristown, TN

All 42 counties

Cherokee County, NC, Clay County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane 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), 27 km from the middle of the area, began a volume at 00:52 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, 0.8 hours before the alert went out and 265 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: 3222 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 103 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 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 freeze watch went out at Apr 10, 7:28 PM EDT, 1 hour 21 minutes earlier.

Area forecast discussion, Apr 10, 7:28 PM EDT, 1 hour 21 minutes before

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Hazardous weather outlook, Apr 10, 5:00 AM EDT, 15 hours 49 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
Apr 11, 3:01 PM EDT	Frost Advisory	MRX	Bradley, Hamilton, McMinn, Meigs, Rhea	18 hr
Apr 11, 3:01 PM EDT	Freeze Warning	MRX	Anderson, Bledsoe, Blount, Campbell, Carter, Claiborne and 22 more	18 hr

Nearby

Freeze Watches in Tennessee, 2012 Freeze Watches in Virginia, 2012 Freeze Watches in North Carolina, 2012 Every freeze watch in 2012

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.