Alert archive / Michigan / Special Weather Statements in 2018

Special Weather Statement, NWS Marquette, MI

August 8, 2018Ontonagon County, Michigan

NWS Marquette, MI issued this special weather statement at Aug 8, 2018, 8:34 PM EDT for Ontonagon County, Michigan. It was in force for 41 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: Aug 8, 2018, 8:34 PM EDT (00:34 UTC)
Expired: Aug 8, 2018, 9:15 PM EDT
In force: 41 min
Issued by: NWS Marquette, MI

County Ontonagon County, MI

The radar

The Marquette radar (KMQT), 168 km from the middle of the area, began a volume at 00:37 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.6 hours before the alert went out and 281 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: 395 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1508 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

Everything else NWS Marquette, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 8, 8:15 PM EDT	Special Marine Warning	MQT		60 min
Aug 8, 8:50 PM EDT	Special Marine Warning	MQT		40 min
Aug 8, 9:10 PM EDT	Special Weather Statement	MQT	Houghton	50 min
Aug 8, 9:16 PM EDT	Special Weather Statement	MQT	Gogebic	59 min
Aug 8, 10:16 PM EDT	Special Weather Statement	MQT	Baraga, Marquette	59 min

Nearby

Special Weather Statements in Michigan, 2018 Every special weather statement in 2018

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.