Flooding is a threat today across southwestern Connecticut in the wake of runoff from heavy rains yesterday and early this morning, the National Weather Service warns.

The rain, combined with the melting snowpack, has swollen some of the state's major rivers north of the region, but the impact may be felt as they or their tributaries flow through the area.

There is patchy fog throughout the region early this morning, and the chance of light precipitation is possible until midday, the NWS says. The clouds should clear later with a high temperature in the low-40s. There will be a north wind between 18 and 23 mph.

Tonight should be clear, with a low temperature about 23.

Tomorrow will be sunny, with a high near 41 degrees. The nighttime low will be around 28.

Wednesday is also expected to be sunny, with a high near 40.

By Wednesday night, the is a chance of rain and snow, mainly after 9 p.m. It will be cloudy, with a low around 33.