Alert archive / Michigan / Winter Storm Warnings in 2024

Winter Storm Warning 4, NWS Grand Rapids, MI

December 10, 20246 counties in Michigan

NWS Grand Rapids, MI issued this winter storm warning at Dec 10, 2024, 3:29 PM EST for 6 counties in Michigan. It took effect at Dec 10, 2024, 10:00 PM EST. It was in force for 41 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 10, 2024, 3:29 PM EST (20:29 UTC)
In effect from
Dec 10, 2024, 10:00 PM EST
Expired
Dec 12, 2024, 3:14 PM EST
In force
41 hr
Issued by
NWS Grand Rapids, MI

Counties Allegan County, MI, Lake County, MI, Mason County, MI, Muskegon County, MI, Oceana County, MI, Ottawa County, MI

The radar

The Grand Rapids radar (KGRR), 74 km from the middle of the area, began a volume at 20:28 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

Alpena, MI (KAPX), launched 12:00Z, 8.5 hours before the alert went out and 351 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, Alpena, MI at 12:00Z on 2024-12-10Temperature 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, Alpena, MI at 12:00Z on 2024-12-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -76 square meters per square second.1939587897117136Sfc1 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
846 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
-76 m²/s²
0-3 km storm-relative helicity
89 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 10, 3:29 PM ESTWinter Weather AdvisoryGRRBarry, Calhoun, Clinton, Eaton, Ingham, Ionia and 6 more48 hr
Dec 10, 3:31 PM ESTGale WarningGRR42 hr
Dec 10, 3:31 PM ESTHeavy Freezing Spray WarningGRR48 hr

Nearby

Winter Storm Warnings in Michigan, 2024Every winter storm warning in 2024

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.