Forecast discussion: Temperatures were below normal this morning, and in eastern Massachusetts, it looked more like winter than spring. If you happened to be out around 5 this morning in Boston, you probably noticed we were receiving light snow. For this evening, the cloudy skies will dissipate, and clear skies will return. However, expect another night of colder than normal temperatures.
As we head into Saturday, high pressure over northern Ohio will finally give us a day of bright sunshine, with the colder air aloft moving out to sea. Temperatures will reach the middle 50’s for high temperatures, although we will keep a cold northwest breeze. A few clouds tomorrow night will help give us a slight ”blanket”, keeping temperatures warmer, as the radiation does not go back into the atmosphere.
We will see mostly sunny skies on Sunday morning, but high and mid-level clouds will begin to take over the skies later in the afternoon. This is due to a weak low pressure system hanging near Maine. This low will help trigger some isolated showers Sunday night into early Monday morning. But, the showers will return, as the sun allows the atmosphere to heat up, and create some instability. We will see isolated to scattered showers into Tuesday afternoon, as the low moves out into the Atlantic.
As we head into the end of April, my eyes will be watching the models closely in the Southeast U.S. A low pressure system hanging over Florida will create some showers and periods of rain. However, the computer models are very unsure if the low will stay to our south, or if it will move far enough north for us to be hit with the precipitation shield. At this time, the American model brings us showers for Wednesday night into Friday. But, the precipitation comes more from a low pressure system to our north, and not the southeast low. The European model pushes that low out to sea, keeping us dry through the forecast period.
Right now, based on seeing yesterday’s model run, the American model was drier, keeping the low further south. This agrees more with the European model’s forecast for today. For now, I am going to keep us dry, but my confidence in the forecast after Tuesday is quite low.
72 hour forecast:
Tonight: Clear skies after 11 p.m. and cold with a low of 36.
Saturday: Mostly sunny and breezy with a high of 57. Winds will come from the west-northwest at 12-15 mph.
Saturday night: Partly cloudy with a low of 40. Winds will come from the north-northwest at 5-8 mph.
Sunday: Mostly sunny with increasing clouds by the late afternoon a high of 54.
Sunday night: Mostly cloudy with a widely isolated shower by 8 p.m. and ending by 3 a.m. We will see a low of 43.
Monday: Mostly sunny until mid-morning, with increasing clouds and isolated showers by 8 a.m. We will see a high of 54.
Monday night: Isolated to scattered showers with a low of 45.
Tuesday: Scattered showers end by 2 p.m. but remaining mostly cloudy. Highs 55-58, lows 42-45.
Wednesday: Partly sunny. Highs 60-63, lows 45-48.
Thursday: Mostly sunny. Highs 60-63, lows 44-47.
Friday: Partly sunny. Highs 56-59, lows 43-46.