Alert archive / Michigan / Winter Storm Warnings in 2013

Winter Storm Warning 1, NWS Grand Rapids, MI

February 6, 201319 counties in Michigan

NWS Grand Rapids, MI issued this winter storm warning at Feb 6, 2013, 3:09 PM EST for 19 counties in Michigan. It took effect at Feb 7, 2013, 12:00 PM EST. It was in force for 20 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: Feb 6, 2013, 3:09 PM EST (20:09 UTC)
In effect from: Feb 7, 2013, 12:00 PM EST
Expired: Feb 8, 2013, 7:32 AM EST
In force: 20 hr
Issued by: NWS Grand Rapids, MI

Counties Allegan County, MI, Barry County, MI, Clare County, MI, Clinton County, MI, Eaton County, MI, Gratiot County, MI, Ingham County, MI, Ionia 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), 46 km from the middle of the area, began a volume at 20:12 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, 8.2 hours before the alert went out and 254 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: 1036 m above ground
0-6 km bulk shear: 87 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 203 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 Feb 6, 12:50 PM EST, 2 hours 19 minutes earlier.

Area forecast discussion, Feb 6, 12:50 PM EST, 2 hours 19 minutes before

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Hazardous weather outlook, Feb 6, 1:24 PM EST, 1 hour 45 minutes before

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In the hours before

Local storm report, Feb 6, 10:55 AM EST, 4 hours 14 minutes before

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Local storm report, Feb 6, 10:56 AM EST, 4 hours 13 minutes before

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Local storm report, Feb 6, 10:58 AM EST, 4 hours 11 minutes before

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Local storm report, Feb 6, 11:00 AM EST, 4 hours 9 minutes before

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Local storm report, Feb 6, 11:01 AM EST, 4 hours 8 minutes before

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Local storm report, Feb 6, 11:02 AM EST, 4 hours 7 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
Feb 6, 2:54 AM EST	Winter Storm Watch	GRR	Allegan, Barry, Clare, Clinton, Eaton, Gratiot and 13 more	12 hr
Feb 6, 11:32 AM EST	Winter Weather Advisory	GRR	Calhoun, Jackson, Kalamazoo, Van Buren	44 hr
Feb 6, 3:34 PM EST	Small Craft Advisory	GRR		52 hr

Nearby

Winter Storm Warnings in Michigan, 2013 Every winter storm warning in 2013

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.