Alert archive / Tennessee / Freeze Warnings in 2017

Freeze Warning 7, NWS Morristown, TN

March 22, 20176 counties in Tennessee; 4 counties in Virginia

NWS Morristown, TN issued this freeze warning at Mar 22, 2017, 2:43 PM EDT for 6 counties in Tennessee; 4 counties in Virginia. It took effect at Mar 23, 2017, 12:00 AM EDT. It was in force for 10 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 22, 2017, 2:43 PM EDT (18:43 UTC)
In effect from: Mar 23, 2017, 12:00 AM EDT
Expired: Mar 23, 2017, 10:00 AM EDT
In force: 10 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, Lee County, VA, Scott County, VA, Washington County, VA

The radar

The Knoxville radar (KMRX), 82 km from the middle of the area, began a volume at 18:46 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.7 hours before the alert went out and 343 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: 899 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: -153 m²/s²
0-3 km storm-relative helicity: 1 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 22, 2:38 PM EDT, 5 minutes earlier.

Area forecast discussion, Mar 22, 2:38 PM EDT, 5 minutes before

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Hazardous weather outlook, Mar 22, 3:10 AM EDT, 11 hours 33 minutes before

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In the hours before

Local storm report, Mar 22, 10:49 AM EDT, 3 hours 54 minutes before

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Local storm report, Mar 22, 11:39 AM EDT, 3 hours 4 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
Mar 21, 8:08 PM EDT	Severe Thunderstorm Warning	MRX	Blount	52 min
Mar 21, 8:09 PM EDT	Areal Flood Advisory	MRX	Bradley, Hamilton, Meigs	3 hr
Mar 21, 8:20 PM EDT	Special Weather Statement	MRX	Knox, Sevier	40 min
Mar 21, 8:54 PM EDT	Special Weather Statement	MRX	Cocke, Hamblen, Jefferson, Sevier	66 min
Mar 21, 8:03 PM EDT	Special Weather Statement	MRX	Cherokee, Clay	57 min
Mar 21, 8:05 PM EDT	Severe Thunderstorm Warning	MRX	Cherokee, Clay	55 min

Nearby

Freeze Warnings in Tennessee, 2017 Freeze Warnings in Virginia, 2017 Every freeze warning in 2017

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.