In a reversal of the balmy temperatures that southwestern Connecticut experienced this past winter and early spring, the National Weather Service today has issued an overnight "freeze watch."

While daytime temperatures will rise into the upper-50s under sunny skies, the readings overnight will plunge to the freezing mark of 32 degrees -- and, in some areas, perhaps lower. The NWS freeze watch is in effect from 3 to 8 a.m. tomorrow.

Later tomorrow, however, also will be sunny and the daytime temperature will again rise to the upper-50s, with a north wind between 9 and 16 mph. Nighttime will be mostly clear and the temperature will fall to the low-30s.

Saturday will be mostly sunny, with a high temperature in the mid-50s. Skies on Saturday night will be partly cloudy, with a low around 40 degrees.

The outlook for Easter Sunday, according to the weather service, will be sunny and temperatures in the upper-50s.