Alert archive / Michigan / Snow Advisories in 2005

Snow Advisory 3, NWS Grand Rapids, MI

December 8, 20059 counties in Michigan

NWS Grand Rapids, MI issued this snow advisory at Dec 8, 2005, 12:01 PM EST for 9 counties in Michigan. It took effect at Dec 8, 2005, 4:00 PM EST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued
Dec 8, 2005, 12:01 PM EST (17:01 UTC)
In effect from
Dec 8, 2005, 4:00 PM EST
Expired
Dec 9, 2005, 3:53 AM EST
In force
12 hr
Issued by
NWS Grand Rapids, MI

Counties Allegan County, MI, Barry County, MI, Clinton County, MI, Gratiot County, MI, Ionia County, MI, Kent County, MI, Montcalm County, MI, Muskegon County, MI, Ottawa County, MI

The radar

The Grand Rapids radar (KGRR), 16 km from the middle of the area, began a volume at 17:05 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, 5.0 hours before the alert went out and 273 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-pSkew-T log-p diagram, Green Bay/Straub, WI at 12:00Z on 2005-12-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 12:00Z on 2005-12-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1009 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
30 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

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 8, 3:46 AM ESTWinter Storm WatchGRRCalhoun, Eaton, Ingham, Jackson, Kalamazoo8 hr
Dec 8, 12:01 PM ESTHeavy Snow WarningGRRAllegan, Barry, Calhoun, Eaton, Ingham, Jackson and 2 more16 hr

Nearby

Snow Advisories in Michigan, 2005Every snow advisory in 2005

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.