For Tonight: An area of low pressure is expected to move off of the Mid-Atlantic coast tonight as a trough of low pressure extends northward from this low pressure center. That low pressure trough is expected to be the focus for rain to both develop later tonight and also be the focal point of where the heaviest rainfall amounts will occur once we get into Friday, Friday night and Saturday.
Rain looks to overspread areas that are near and south of the Mass Pike after midnight tonight. This rain should overspread the remaining parts of Western and Central Mass by about sunrise Friday morning.
Low temperatures will be near 50 Degrees. Winds will be Northeast at 5 to 10 mph.
Friday & Friday Night: While rain is expected across a majority of the area during Friday and Friday night, the intensity of the rain will vary greatly depending on where you’re located in relation to that low pressure trough. It appears that the low pressure trough looks to set itself up from parts of New Jersey northward into southeastern New York and western Connecticut. This is where a big time dumping of rain is expected with amounts of 4 to 8 inches are expected
Across our area, Western parts of Mass and especially the lower Pioneer Valley looks to be the spot to really watch for heavy rainfall amounts and the threat for flooding. Further east across Central Mass, while it’s expected to rain throughout Friday and Friday night, the amounts of rain looks to be much more manageable.
So, rain is expected throughout all of Friday and all of Friday night across the entire area. Periods of moderate to heavy rain looks likely across the Berkshires as well as across the lower Pioneer Valley of Western Mass throughout all of Friday and much of Friday night and this heavy rain is likely to lead to flood issues of roads, highways, underpasses and areas of poor drainage.
Rainfall amounts from Friday through Friday night are anticipated to range from one quarter to one half of an inch across the I-495 corridor as well as across the far northern Worcester Hills to one half of an inch to one inch of rainfall from the upper Pioneer Valley southeastward to the Worcester Metro, as well as the I-190 and I-395 corridors to 1 to 2 inches of rainfall across the central Pioneer Valley, the western Worcester Hills and the I-84 corridor to 2 to 3 inches of rainfall with locally higher amounts expected across the southern Berkshires and the lower Pioneer Valley of Western Mass. A forecast rainfall map for the upcoming storm has been attached to this post.
High temperatures Friday will be between 60 and 65 Degrees. Low temperatures Friday night will be between 50 and 55 Degrees. Winds on Friday and Friday night will be Northeast at 5 to 10 mph.
This Weekend: Rain is expected to continue throughout Saturday morning across the entire area, although the intensity of the rain looks to be generally light. This rain looks to then to come to an end during Saturday afternoon. High temperatures Saturday will be between 60 and 65 Degrees. Lots of sunshine is expected throughout the day on Sunday with high temperatures near 75 Degrees.
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