Alert archive / Michigan / Winter Storm Warnings in 2008

Winter Storm Warning 12, NWS Grand Rapids, MI

December 23, 200813 counties in Michigan

NWS Grand Rapids, MI issued this winter storm warning at Dec 23, 2008, 11:36 AM EST for 13 counties in Michigan. It was in force for 35 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 23, 2008, 11:36 AM EST (16:36 UTC)
Expired: Dec 24, 2008, 10:33 PM EST
In force: 35 hr
Issued by: NWS Grand Rapids, MI

Counties Allegan County, MI, Clare County, MI, Isabella County, MI, Kent County, MI, Lake County, MI, Mason County, MI, Mecosta County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Osceola County, MI, Ottawa County, MI

The radar

The Grand Rapids radar (KGRR), 68 km from the middle of the area, began a volume at 16:34 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, 4.6 hours before the alert went out and 223 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: 480 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 215 m²/s²
0-3 km storm-relative helicity: 292 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 Grand Rapids, MI wrote its last area forecast discussion before this winter storm warning went out at Dec 23, 9:55 AM EST, 1 hour 41 minutes earlier.

Area forecast discussion, Dec 23, 9:55 AM EST, 1 hour 41 minutes before

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Hazardous weather outlook, Dec 23, 5:59 AM EST, 5 hours 37 minutes before

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In the hours before

Local storm report, Dec 23, 10:10 AM EST, 1 hour 26 minutes before

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Local storm report, Dec 23, 11:33 AM EST, 3 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 23, 3:36 AM EST	Winter Weather Advisory	GRR	Allegan, Barry, Calhoun, Clare, Clinton, Eaton and 17 more	43 hr
Dec 23, 10:11 AM EST	Gale Warning	GRR		8 hr
Dec 23, 6:24 PM EST	Small Craft Advisory	GRR		42 hr

Nearby

Winter Storm Warnings in Michigan, 2008 Every winter storm 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.