Alert archive / Tennessee / Special Weather Statements in 2017

Special Weather Statement, NWS Morristown, TN

May 4, 2017Anderson County, Knox County, Loudon County, Tennessee

NWS Morristown, TN issued this special weather statement at May 4, 2017, 7:13 PM EDT for Anderson County, Knox County, Loudon County, Tennessee. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 4, 2017, 7:13 PM EDT (23:13 UTC)
Expired: May 4, 2017, 8:00 PM EDT
In force: 47 min
Issued by: NWS Morristown, TN

Counties Anderson County, TN, Knox County, TN, Loudon County, TN

The radar

The Knoxville radar (KMRX), 78 km from the middle of the area, began a volume at 23:17 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 12:00Z, 11.2 hours before the alert went out and 217 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: 818 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 4, 3:29 PM EDT, 3 hours 44 minutes earlier.

Area forecast discussion, May 4, 3:29 PM EDT, 3 hours 44 minutes before

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Hazardous weather outlook, May 4, 3:48 PM EDT, 3 hours 25 minutes before

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In the hours before

Local storm report, May 4, 2:36 PM EDT, 4 hours 37 minutes before

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Local storm report, May 4, 3:16 PM EDT, 3 hours 57 minutes before

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Local storm report, May 4, 4:18 PM EDT, 2 hours 55 minutes before

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Local storm report, May 4, 4:46 PM EDT, 2 hours 27 minutes before

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Local storm report, May 4, 6:47 PM EDT, 26 minutes before

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Special weather statement, May 4, 7:13 PM EDT, 0 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 4, 7:25 PM EDT	Special Weather Statement	MRX	Hamilton, Sequatchie	65 min

Nearby

Special Weather Statements in Tennessee, 2017 Every special weather statement 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.