Wednesday, January 25, 2012

January 26th, 2012 Forecast

A storm system is moving on in from the southwest and will bring us some steady rains tomorrow night and early Friday.  However, the first fingers of the storm system will be working into the region later tonight as warmer air aloft works over a shallow "cool" layer of air at the surface.  This overrunning setup could spit out some snow, sleet, or light rain showers to the city's west after 2 or 3 AM.   Some of this might work into the city but the odds favor more the western suburbs and northwestern suburbs than the city itself.  Any showers that do develop will generally be light but precipitation type is tougher to pin down because temperatures will be marginal at both the surface and aloft...but the best chances for frozen will be northwest, with a better chance of  just "plain" rain southwest.

Thursday features those morning showers, perhaps a break for a time, with more showers spreading in during the midday and afternoon hours.  Those showers could become a steadier rain towards evening, which will yield a decent rain event for Thursday night into Friday that could bring upwards of an inch of rain.

Temperatures tonight drop to near freezing in the city, in the upper 20's or low 30's in the burbs around midnight before leveling off and perhaps even rising a notch or two before daybreak.  Thursday's highs will range from the low 40's northwest to the upper 40's southeast.   With rains around Thursday night, temperatures hold steady for the evening, then rise after Midnight into the 50's for the city and south, perhaps to around 50 northwest for Friday morning.