DAYS 1-5 (APRIL 21-25)<\/p>\n\n\n\n
The changeability of New England’s spring weather can be showcased in many ways. Yesterday in speaking with a friend on social media, I noted that one such example of the upcoming swings will be that some locations that reached or exceeded 70 yesterday may see a snow shower Thursday evening with wind chill in the 20s, only to be back near 70 again Saturday. When the first bubblings of the coming summer’s heat start to build in the South, and winter’s lingering cold and snow cover try to hang on in Canada, they often meet somewhere between, and our region is definitely somewhere in between. We live in a meteorological battleground, and while this can be seen numerous times throughout the year, it’s often most vividly displayed in the springtime. And here we are now. This next showcase of variability will be started as a frontal boundary, the one that entered from the west as a cold front that promptly came to a halt over the region and slid back to the north as a warm front, becomes the atmospheric running board for a low pressure wave today. This low will track just northwest of the WHW forecast area, across northern New England. On our side of the boundary resides mild air, for now, and the low pressure areas and the contrast across the front from our mild side to a much colder air mass on the other side, will result in a more widespread ribbon of showery rainfall that will be preceded by isolated rain showers. Once the main shower area gets here it may have a thunderstorm or two embedded in it, but mainly this will just be a gusty rain shower episode later today into this evening. The snow that has been falling across much of the Midwest behind the front is going to head across northern New England, giving the mountains a bit of snow for a little more spring skiing, and while that area will miss our area, the cold air behind the front will not miss. We’ll see a significant temperature tumble from today’s mild readings to air that feels more like February or March on Thursday, which is ironically Earth Day. Not a great day for an Earth Day picnic – sorry! Blustery, chilly, sun to start then lots of clouds. Some of those clouds may even produce a rain or snow shower, favoring the hilly terrain west and north of Boston, by later Thursday. The gusty wind will be the result of the air pressure difference between departing low pressure in eastern Canada and a high pressure area sliding southeastward from the Ohio Valley to the Middle Atlantic States. This high will move across the Middle Atlantic and offshore during Friday and Saturday. During that time we will see the wind relax and shift to the west Friday and southwest Saturday, resulting in a warming trend with dry weather. Another low pressure area will be trekking eastward in a now zonal (west to east) flow pattern, and it’s destined to bring our next shot at much needed rainfall for the second half of the upcoming weekend. More details on this system as we get a little bit closer to the event…<\/p>\n\n\n\n
TODAY: Partly sunny through early afternoon with isolated rain showers. Mostly cloudy mid through late afternoon with widespread rain showers and possibly a thunderstorm arriving from west to east. Highs 55-62 South Coast, 63-70 elsewhere. Wind S increasing to 10-20 MPH, gusts to 30 MPH.<\/p>\n\n\n\n
TONIGHT: Cloudy with numerous rain showers evening. Clearing west to east overnight. Lows 32-39. Wind shifting to NW 15-25 MPH, gusts 30-40 MPH.<\/p>\n\n\n\n
THURSDAY: Sunny start, then lots of clouds. A rain or snow shower possible mainly hills north and west of Boston by mid to late afternoon. Highs 43-50. Wind NW 15-25 MPH, gusts 30-40 MPH.<\/p>\n\n\n\n
THURSDAY NIGHT: Variably cloudy. Slight chance of a rain or snow shower early. Lows 31-38. Wind W 10-20 MPH and gusty.<\/p>\n\n\n\n
FRIDAY: Partly sunny. Highs 50-57. Wind W 10-20 MPH, gusts up to 30 MPH.<\/p>\n\n\n\n
FRIDAY NIGHT: Mostly clear. Lows 40-47. Wind SW 5-15 MPH.<\/p>\n\n\n\n
SATURDAY: Sun and high clouds. Highs 65-72, cooler South Coast. Wind SW 5-15 MPH.<\/p>\n\n\n\n
SATURDAY NIGHT: Clouding up. Lows 47-54. Wind S to SE 5-15 MPH.<\/p>\n\n\n\n
SUNDAY: Cloudy. Rain likely. Highs 50-57. Wind E 10-20 MPH and gusty.<\/p>\n\n\n\n
DAYS 6-10 (APRIL 26-30)<\/p>\n\n\n\n
Zonal (west to east) flow pattern starts to transition to blocking again… Drier\/breezy\/cool April 26 as low pressure departs and high pressure builds toward the region from the west. High pressure may sit over the area for several days thereafter ending April with a dry stretch, temperatures trending milder but coolest along the coast much of the time.<\/p>\n\n\n\n
DAYS 11-15 (MAY 1-5)<\/p>\n\n\n\n
Favoring continued blocking with the region staying mostly dry with near seasonable temperatures, but it won’t take much to completely change this outlook, so it’s low confidence.<\/p>\n","protected":false},"excerpt":{"rendered":"
DAYS 1-5 (APRIL 21-25) The changeability of New England’s spring weather can be showcased in many ways. Yesterday in speaking with a friend on social media, I noted that one such example of the upcoming swings will be that some locations that reached or exceeded 70 yesterday may see a snow shower Thursday evening with … Continue reading Wednesday April 21 2021 Forecast (7:13AM)<\/span>