Chicago NWS
UPDATE...
Issued at 1127 AM CST Thu Nov 21 2024
Just a note on forecast expectations into this afternoon.
Recent reports indicate up to 3" of snow in Lake and Cook
Counties, with moderate to heavy snow continuing to fall,
including 1/4 mile visibility at KMDW as of this writing. Also
seeing less than 1/4 mile visibilty at KGYY and KIGQ. A look
well upstream shows primarily snow hanging on up until central
Wisconsin, where the transition to light rain and drizzle has
taken place from a combination of warming temps and decreasing
cloud ice.
The overall trend is a slower rise in temps over the next
couple hours and correspondingly the ptype transition taking a
bit longer as well. Warming cloud tops punching south from
southeast Wisconsin will steadily diminish snowfall rates into
the Chicago metro, and then bring the anticipated changeover to
light rain and drizzle in the 2-3pm timeframe. While snow will
hang on a bit longer than earlier forecasts, little (up to a
couple tenths) to no additional accumulation is expected after
noon for most of the Chicago metro. Thus, not currently seeing
any reason to change the advisory end time of 1pm.