Alert archive / Tennessee / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 57, NWS Morristown, TN

May 24, 2020Cocke County, Jefferson County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at May 24, 2020, 2:59 PM EDT for Cocke County, Jefferson County, Tennessee. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 24, 2020, 2:59 PM EDT (18:59 UTC)
Expired: May 24, 2020, 3:30 PM EDT
In force: 31 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cocke County, TN, Jefferson County, TN

The radar

The Knoxville radar (KMRX), 23 km from the middle of the area, began a volume at 19:01 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, 7.0 hours before the alert went out and 304 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: 37 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 1370 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 31 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 severe thunderstorm 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 severe thunderstorm warning went out at May 24, 1:24 PM EDT, 1 hour 35 minutes earlier.

Area forecast discussion, May 24, 1:24 PM EDT, 1 hour 35 minutes before

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Hazardous weather outlook, May 24, 3:02 AM EDT, 11 hours 57 minutes before

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In the hours before

Special weather statement, May 24, 1:55 PM EDT, 1 hour 4 minutes before

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Special weather statement, May 24, 2:30 PM EDT, 29 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
May 24, 12:02 AM EDT	Special Weather Statement	MRX	Marion	28 min
May 24, 1:55 PM EDT	Special Weather Statement	MRX	Campbell	35 min
May 24, 2:30 PM EDT	Special Weather Statement	MRX	Sevier	30 min
May 24, 4:50 PM EDT	Special Weather Statement	MRX	Hamblen	25 min
May 24, 7:28 PM EDT	Special Weather Statement	MRX	Union	32 min
May 24, 3:23 PM EDT	Special Weather Statement	MRX	City of Norton	37 min
May 24, 4:22 PM EDT	Areal Flood Advisory	MRX	Russell, Scott, Wise, City of Norton	3 hr
May 24, 6:40 PM EDT	Areal Flood Advisory	MRX	Lee	4 hr
May 24, 3:15 PM EDT	Special Weather Statement	MRX	Clay	30 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2020 Every severe thunderstorm warning 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.