OBSERVED SNOW COVER
Monday morning, January 16, 2023


Little or no snow accumulation is expected in the Chicago area through the upcoming weekend. Beyond that period, forecast models are hinting at a potential for snow to accompany a trend toward more seasonable temperatures. This would favor climatology. Of nine winters since that of 1884-85 that produced 4.7” or less of snow through mid-January, average snowfall in the following February-March period was 14.7”. The current normal for the two-month period is 16.2”.
GFS MODEL: FORECAST SNOWFALL
Valid January 21-26

EUROPEAN MODEL: FORECAST SNOWFALL
Valid January 21-26

Above normal temps are expected to continue through the upcoming weekend, followed by a pattern shift that is forecast to evolve into one favoring sub-normal temps by late January.
EUROPEAN ENSEMBLE FORECAST MEAN TEMPERATURE DEPARTURE FROM NORMAL
Valid through January 21st

EUROPEAN ENSEMBLE FORECAST MEAN TEMPERATURE DEPARTURE FROM NORMAL
Valid January 26-31

NEXT STORM SYSTEM PRIMARILY ANOTHER RAIN PRODUCER
Area snow deficit to increase through mid January
Update on forecast for Wednesday to Thursday conditions

CHICAGO’S PRECIPITATION CHANCES
More active weather pattern in place: next weather system arrives Wednesday night into Thursday

NATION’S MID-SECTION BATHED IN UNSEASONABLY MILD AIR
Monday high temperatures

How much above normal?

FULL-DAY TEMP DEPARTURES FROM NORMAL
Milder than normal pattern persists another week before a shift to colder, more typical January weather

