Alert archive / Michigan / Lake Effect Snow Warnings in 2008

Lake Effect Snow Warning 13, NWS Marquette, MI

December 18, 2008Keweenaw County, Michigan

NWS Marquette, MI issued this lake effect snow warning at Dec 18, 2008, 8:56 AM EST for Keweenaw County, Michigan. It was in force for 9 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: Dec 18, 2008, 8:56 AM EST (13:56 UTC)
Expired: Dec 18, 2008, 6:00 PM EST
In force: 9 hr
Issued by: NWS Marquette, MI

County Keweenaw County, MI

The radar

The Marquette radar (KMQT), 98 km from the middle of the area, began a volume at 14:08 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

Minneapolis, MN (KMPX), launched 12:00Z, 1.9 hours before the alert went out and 496 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: 638 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 154 m²/s²
0-3 km storm-relative helicity: 173 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 Dec 17, 6:22 PM EST, 14 hours 34 minutes earlier.

Area forecast discussion, Dec 17, 6:22 PM EST, 14 hours 34 minutes before

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Hazardous weather outlook, Dec 17, 11:14 AM EST, 21 hours 42 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 18, 5:09 AM EST	Gale Warning	MQT		34 hr
Dec 18, 5:09 AM EST	Heavy Freezing Spray Warning	MQT		32 hr
Dec 18, 4:07 PM EST	Lake Effect Snow Advisory	MQT	Baraga, Houghton, Keweenaw, Marquette	33 hr

Nearby

Lake Effect Snow Warnings in Michigan, 2008 Every lake effect snow warning in 2008

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.