Alert archive / Michigan / Lake Effect Snow Warnings in 2012

Lake Effect Snow Warning 2, NWS Marquette, MI

January 18, 20126 counties in Michigan

NWS Marquette, MI issued this lake effect snow warning at Jan 18, 2012, 4:22 PM EST for 6 counties in Michigan. It took effect at Jan 18, 2012, 10:00 PM EST. It was in force for 27 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 18, 2012, 4:22 PM EST (21:22 UTC)
In effect from: Jan 18, 2012, 10:00 PM EST
Expired: Jan 20, 2012, 1:00 AM EST
In force: 27 hr
Issued by: NWS Marquette, MI

Counties Alger County, MI, Houghton County, MI, Keweenaw County, MI, Luce County, MI, Ontonagon County, MI, Schoolcraft County, MI

The radar

The Marquette radar (KMQT), 18 km from the middle of the area, began a volume at 21:27 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, 9.4 hours before the alert went out and 248 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: 934 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 66 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 lake effect snow 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 lake effect snow warning went out at Jan 18, 1:14 PM EST, 3 hours 8 minutes earlier.

Area forecast discussion, Jan 18, 1:14 PM EST, 3 hours 8 minutes before

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Hazardous weather outlook, Jan 18, 6:05 AM EST, 10 hours 17 minutes before

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In the hours before

Local storm report, Jan 18, 10:22 AM EST, 6 hours before

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Local storm report, Jan 18, 11:06 AM EST, 5 hours 16 minutes before

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Local storm report, Jan 18, 11:20 AM EST, 5 hours 2 minutes before

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Local storm report, Jan 18, 11:32 AM EST, 4 hours 50 minutes before

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Local storm report, Jan 18, 1:39 PM EST, 2 hours 43 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 17, 11:06 PM EST	Gale Warning	MQT		44 hr
Jan 17, 11:06 PM EST	Heavy Freezing Spray Warning	MQT		56 hr
Jan 18, 4:18 AM EST	Small Craft Advisory	MQT		21 hr
Jan 18, 5:01 AM EST	Winter Storm Watch	MQT	Alger, Gogebic, Houghton, Keweenaw, Luce, Ontonagon and 1 more	11 hr
Jan 18, 7:07 AM EST	Small Craft Advisory	MQT		22 hr
Jan 18, 11:30 AM EST	Lake Effect Snow Advisory	MQT	Gogebic, Houghton, Luce	29 hr

Nearby

Lake Effect Snow Warnings in Michigan, 2012 Every lake effect snow warning in 2012

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.