There is going to be a major temperature change over the next 24 hours as a strong cold front sweeps out the warm air from the last few days and replaces it with a much colder air mass. As that transitions occurs, rain and wind are moving through. In fact, scattered showers began developing overnight, blocking out the lunar eclipse for southern New England stargazers. Those scattered showers are continuing to pop-up this morning and into this afternoon ahead of the main area of soaking rain. Heavier rain is expected to move in by late afternoon and evening and then continue into the night.
Here’s what to expect:
RAIN: 1-2″ with isolated higher totals.
Our area is now under a flood watch until Wednesday morning. We are mostly concerned with street and poor drainage flooding for this evening, but our swollen rivers and streams will need to be watched for possible flooding if higher rainfall totals occur.
WIND: Southerly winds 20-30mph with gusts up to 50mph.
A Wind advisory is in effect from noon until midnight, when most of the stronger gusts are expected. Smaller branches and tree limbs could fall leading to isolated power outages. Minor coastal flooding is possible during this evening’s high tide (around 8:30-9pm) due to the strong southerly winds pushing water to the shoreline.
TEMPERATURES: Near 65 this afternoon and then tumbling to near 33 by dawn Wednesday.
Mild air ahead of a strong cold front will keep temperatures above average for one last day. Even this evening starts mild, with temperatures in the 50s as late as 10pm before rapidly dropping into the 30s once the cold front moves through. We’ll have to watch northwestern suburbs, where temperatures may fall below freezing for a few hours, with some icy spots possible on untreated surfaces.