Alert archive / Michigan / Winter Storm Warnings in 2009

Winter Storm Warning 8, NWS Grand Rapids, MI

December 7, 2009Muskegon County, Oceana County, Michigan

NWS Grand Rapids, MI issued this winter storm warning at Dec 7, 2009, 10:30 AM EST for Muskegon County, Oceana County, Michigan. It was in force for 5 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 7, 2009, 10:30 AM EST (15:30 UTC)
Expired: Dec 7, 2009, 3:00 PM EST
In force: 5 hr
Issued by: NWS Grand Rapids, MI

Counties Muskegon County, MI, Oceana County, MI

The radar

The Grand Rapids radar (KGRR), 85 km from the middle of the area, began a volume at 15:34 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, 3.5 hours before the alert went out and 186 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: 728 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 132 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 7, 6:35 AM EST, 3 hours 55 minutes earlier.

Area forecast discussion, Dec 7, 6:35 AM EST, 3 hours 55 minutes before

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Hazardous weather outlook, Dec 7, 6:12 AM EST, 4 hours 18 minutes before

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In the hours before

Local storm report, Dec 7, 10:17 AM EST, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1017 AM EST MON DEC 07 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1016 AM     SNOW             4 NW MONTAGUE           43.46N 86.42W
12/07/2009  M5.0 INCH        MUSKEGON           MI   CO-OP OBSERVER

            SNOWFALL FROM 7 AM TO 10 AM TODAY.

&&

MKALEMBK

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 6, 9:43 PM EST	Gale Watch	GRR		31 hr
Dec 7, 4:00 AM EST	Winter Storm Watch	GRR	Allegan, Barry, Clare, Clinton, Eaton, Gratiot and 15 more	49 hr
Dec 7, 3:47 PM EST	Winter Storm Warning	GRR	Allegan, Clare, Gratiot, Ionia, Isabella, Kent and 9 more	37 hr

Nearby

Winter Storm Warnings in Michigan, 2009 Every winter storm warning in 2009

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.