Alert archive / Tennessee / High Wind Watches in 2020

High Wind Watch 4, NWS Morristown, TN

April 10, 20208 counties in Tennessee

NWS Morristown, TN issued this high wind watch at Apr 10, 2020, 3:32 PM EDT for 8 counties in Tennessee. It took effect at Apr 12, 2020, 11:00 AM EDT. It was in force for .

The area

The counties it named.

The facts

Issued: Apr 10, 2020, 3:32 PM EDT (19:32 UTC)
In effect from: Apr 12, 2020, 11:00 AM EDT
Expired: Apr 11, 2020, 3:05 PM EDT
In force
Issued by: NWS Morristown, TN

Counties Blount County, TN, Carter County, TN, Cocke County, TN, Greene County, TN, Johnson County, TN, Monroe County, TN, Sevier County, TN, Unicoi County, TN

The radar

The Knoxville radar (KMRX), 41 km from the middle of the area, began a volume at 19:34 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, 7.5 hours before the alert went out and 280 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: 1628 m above ground
0-6 km bulk shear: 121 kt
0-1 km storm-relative helicity: -158 m²/s²
0-3 km storm-relative helicity: -68 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 high wind 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 high wind watch went out at Apr 10, 1:38 PM EDT, 1 hour 54 minutes earlier.

Area forecast discussion, Apr 10, 1:38 PM EDT, 1 hour 54 minutes before

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Hazardous weather outlook, Apr 10, 3:24 PM EDT, 8 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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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 10, 3:35 AM EDT	Freeze Warning	MRX	Anderson, Bledsoe, Campbell, Carter, Claiborne, Grainger and 10 more	30 hr
Apr 10, 3:32 PM EDT	Frost Advisory	MRX	Blount, Bradley, Cocke, Hamilton, Jefferson, Knox and 9 more	18 hr

Nearby

High Wind Watches in Tennessee, 2020 Every high wind watch in 2020

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.