Alert archive / Michigan / Winter Storm Warnings in 2018

Winter Storm Warning 4, NWS Marquette, MI

January 21, 201812 counties in Michigan

NWS Marquette, MI issued this winter storm warning at Jan 21, 2018, 3:35 PM EST for 12 counties in Michigan. It took effect at Jan 22, 2018, 7:00 AM EST. It was in force for 18 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: Jan 21, 2018, 3:35 PM EST (20:35 UTC)
In effect from: Jan 22, 2018, 7:00 AM EST
Expired: Jan 23, 2018, 1:25 AM EST
In force: 18 hr
Issued by: NWS Marquette, MI

Counties Alger County, MI, Baraga County, MI, Delta County, MI, Dickinson County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Luce County, MI, Marquette County, MI, Menominee County, MI, Ontonagon County, MI, Schoolcraft County, MI

The radar

The Marquette radar (KMQT), 26 km from the middle of the area, began a volume at 20:34 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.6 hours before the alert went out and 208 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: 1327 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 145 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 winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Marquette, MI wrote its last area forecast discussion before this winter storm warning went out at Jan 21, 12:48 PM EST, 2 hours 47 minutes earlier.

Area forecast discussion, Jan 21, 12:48 PM EST, 2 hours 47 minutes before

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Hazardous weather outlook, Jan 21, 6:05 AM EST, 9 hours 30 minutes before

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In the hours before

Special weather statement, Jan 21, 11:08 AM EST, 4 hours 27 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 3:35 PM EST	Winter Weather Advisory	MQT	Houghton, Keweenaw	34 hr
Jan 21, 3:39 PM EST	Gale Warning	MQT		45 hr
Jan 21, 3:39 PM EST	Heavy Freezing Spray Warning	MQT		50 hr

Nearby

Winter Storm Warnings in Michigan, 2018 Every winter storm warning 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.