Radar returns are actually now probably the most impressive they have been for the whole les event so far. Updated discussion from NWS GRR.
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FXUS63 KGRR 242040
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
340 PM EST Sat Dec 24 2022
LATEST UPDATE...
Discussion/Marine
.DISCUSSION... (This evening through next Saturday)
Issued at 340 PM EST Sat Dec 24 2022
Radar is showing more of a laminar and larger scale look to the snowbands farther inland close to US-131 compared to a more chaotic smaller cell appearance closer to the lakeshore. Inland penetration is also far greater. This suggests the development of a standing (or perhaps slowly downstream propagating) gravity wave. The genesis of this wave could be related to recent changes in our convective boundary layer (CBL) depth (currently around 6000 ft, per the GRR 88D, compared to twice that this morning), and slightly weaker CBL mean flow (now 30 kt or less). Remarkably, we are now also detecting bands as far north as the US-10 region including Osceola and Clare Counties. Increased depth is to be expected in conjunction with the increased band width and spacing.
This will make dangerous travel conditions even worse into this evening due to very drastic changes in winds and visibility compared to what most have experienced earlier today. Indeed, we are seeing this at the office with periodic drops to near zero visibility and elevated winds beneath these bands.
We will see how this plays out in the next few hours. One thing that's been discussed in replacing the blizzard warning with an advisory at 7 PM that would go until 7 PM Christmas day, likely for just the western two tiers of counties closest to the lakeshore. Stay tuned for that.