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Humidity: 93%
Wind: 7 mph
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The risk for wintry precipitation is lower for Thursday but several days of cool, overcast and raw weather look to be in store for late week into the first weekend in April.
1 Key Message 1
Breezy and unseasonably mild Monday away from the south coast.
2 Key Message 2
Period of above normal temperatures Tuesday and Wednesday, with a chance for low to mid 70s highs on Wednesday. Nighttime lows Tuesday night could be significantly above normal. Cold front moves in Wednesday afternoon and night bringing showers and a low chance for a rumble or two of thunder.
3 Key Message 3
Overcast, cool and raw weather Thursday through Saturday on northeast winds. Intermittent rain showers possible but better chance for rain on Friday as frontal boundary shifts southward.
KEY MESSAGE 1... Breezy and unseasonably mild Monday away from the south coast.
High pres moves offshore tonight and Monday with SW flow continuing. This will result in a milder night tonight and an unseasonably mild day Mon in the interior valleys. 925 mb temps increase to 8-10°C (14°F) so temps should reach the mid-upper 60s across CT valley and interior NE MA with mid 50s along the south coast. Dry weather expected through Mon although there will be enough mid-high clouds around to limit sunshine at times but overall a partly sunny day expected. It will also be rather breezy, especially near the coast as a 40-60 kt low level jet develops. The jet is above a low level inversion which will prevent these stronger winds from mixing down but soundings show a shallow mixed layer supportive of 25-35 mph gusts.
A backdoor front will push south from northern New Eng and may get into NE MA by Tue morning. Continued SW flow and advection of higher dewpoint air into SNE will result in areas of stratus developing and can't rule out patchy drizzle overnight along with a few showers as higher PWATs move in. Cloud cover and SW flow will keep low temps in the 40s to near 50 in the CT valley.
KEY MESSAGE 2... Period of above normal temperatures Tuesday and Wednesday, with a chance for low to mid 70s highs on Wednesday. Nighttime lows Tuesday night could be significantly above normal. Cold front moves in Wednesday afternoon and night bringing showers and a low chance for a rumble or two of thunder.
Challenging temperature forecast for Tuesday as a backdoor cold front tries to slip southward out of NH/ME into northern MA, while increasingly milder southerly flow builds into CT and western MA. Considerable cloudiness in all areas though, but nebulous forcing (better to our north and west), a modest increase in PWATs with drier air aloft probably favors very light rain or drizzle. Daytime max temps could struggle to get into the low 50s Tuesday in NE/eastern MA, but the further south and west one goes, better chance at highs in the 60s.
The warmer air aloft advecting in eventually wins out though, as southerly winds and continued overcast allow for a mild and increasingly moist Tue night. Highs for the day in NE MA could occur closer to midnight, but elsewhere, temps may not fall very far and/or rise some with values in the mid 50s. Potential exists for one of the milder nights we've seen in a while, and there's a chance sites like Hartford, Springfield and surrounding towns stay above 60 degrees for lows.
Coming out of a likely very mild and breezy Tuesday night, Wednesday still looks to be a quite mild day away from the south coast as 850 mb temps warm to +10 to +12°C (54°F) and 925 temps sit around 14 to +17°C (63°F). Potential exists for highs in the mid 70s in some of the usually warmer spots (CT Merrimack Valleys) with upper 60s/low 70s elsewhere away from the south coast where highs will be kept cooler in the 50s/lower 60s given SW winds off the water. How warm we ultimately get will depend on the still-unclear timing of a cold front that will be shifting southeastward. Front also brings a better chance for at least showers, but with a low chance for a rumble or two of thunder based on narrow CAPE profiles with surface-based CAPEs around 500 J/kg. Front should have made it into the southern waters by overnight, with temps on the downswing into the upper 30s to mid 40s as the front moves south.
KEY MESSAGE 3... Overcast, cool and raw weather Thursday through Saturday on northeast winds. Intermittent rain showers possible but better chance for rain on Friday as frontal boundary shifts southward.
The late-week/early weekend period is the cooler, overcast and raw portion of the forecast. Increasing NE winds as shallow near-surface colder air filters southward, but temps aloft remain quite warm under SWly 850-500 mb flow with 925 mb temps around +2 to +8°C (46°F). Although the threat for wintry precipitation looks minimal now, this pattern will maintain low clouds with intermittent showers and likely lead to a pretty raw day on Thurs. NBM temps in the mid 40s to low 50s are almost certainly too optimistic following its typical diurnal temperature curve, and that's very probably not appropriate given overcast and persistent NE winds. Plenty of room to go lower on temps in future updates but potential exists for widespread upper 30s to mid 40s with NE winds Thurs around 10-15 mph. Temps probably not going very far either Thurs night or Fri with highs in the mid 40s, with a better shot at widespread rain Fri as a cool front moves in from NY.
We again repeat the same weather pattern Sat as the same one from Thurs, with shallow cool air on NE winds and persistent low clouds under a continued mild profile of air aloft.
High pres moves offshore tonight and Monday with SW flow continuing. This will result in a milder night tonight and an unseasonably mild day Mon in the interior valleys. 925 mb temps increase to 8-10°C (14°F) so temps should reach the mid-upper 60s across CT valley and interior NE MA with mid 50s along the south coast. Dry weather expected through Mon although there will be enough mid-high clouds around to limit sunshine at times but overall a partly sunny day expected. It will also be rather breezy, especially near the coast as a 40-60 kt low level jet develops. The jet is above a low level inversion which will prevent these stronger winds from mixing down but soundings show a shallow mixed layer supportive of 25-35 mph gusts.
A backdoor front will push south from northern New Eng and may get into NE MA by Tue morning. Continued SW flow and advection of higher dewpoint air into SNE will result in areas of stratus developing and can't rule out patchy drizzle overnight along with a few showers as higher PWATs move in. Cloud cover and SW flow will keep low temps in the 40s to near 50 in the CT valley.
KEY MESSAGE 2... Period of above normal temperatures Tuesday and Wednesday, with a chance for low to mid 70s highs on Wednesday. Nighttime lows Tuesday night could be significantly above normal. Cold front moves in Wednesday afternoon and night bringing showers and a low chance for a rumble or two of thunder.
Challenging temperature forecast for Tuesday as a backdoor cold front tries to slip southward out of NH/ME into northern MA, while increasingly milder southerly flow builds into CT and western MA. Considerable cloudiness in all areas though, but nebulous forcing (better to our north and west), a modest increase in PWATs with drier air aloft probably favors very light rain or drizzle. Daytime max temps could struggle to get into the low 50s Tuesday in NE/eastern MA, but the further south and west one goes, better chance at highs in the 60s.
The warmer air aloft advecting in eventually wins out though, as southerly winds and continued overcast allow for a mild and increasingly moist Tue night. Highs for the day in NE MA could occur closer to midnight, but elsewhere, temps may not fall very far and/or rise some with values in the mid 50s. Potential exists for one of the milder nights we've seen in a while, and there's a chance sites like Hartford, Springfield and surrounding towns stay above 60 degrees for lows.
Coming out of a likely very mild and breezy Tuesday night, Wednesday still looks to be a quite mild day away from the south coast as 850 mb temps warm to +10 to +12°C (54°F) and 925 temps sit around 14 to +17°C (63°F). Potential exists for highs in the mid 70s in some of the usually warmer spots (CT Merrimack Valleys) with upper 60s/low 70s elsewhere away from the south coast where highs will be kept cooler in the 50s/lower 60s given SW winds off the water. How warm we ultimately get will depend on the still-unclear timing of a cold front that will be shifting southeastward. Front also brings a better chance for at least showers, but with a low chance for a rumble or two of thunder based on narrow CAPE profiles with surface-based CAPEs around 500 J/kg. Front should have made it into the southern waters by overnight, with temps on the downswing into the upper 30s to mid 40s as the front moves south.
KEY MESSAGE 3... Overcast, cool and raw weather Thursday through Saturday on northeast winds. Intermittent rain showers possible but better chance for rain on Friday as frontal boundary shifts southward.
The late-week/early weekend period is the cooler, overcast and raw portion of the forecast. Increasing NE winds as shallow near-surface colder air filters southward, but temps aloft remain quite warm under SWly 850-500 mb flow with 925 mb temps around +2 to +8°C (46°F). Although the threat for wintry precipitation looks minimal now, this pattern will maintain low clouds with intermittent showers and likely lead to a pretty raw day on Thurs. NBM temps in the mid 40s to low 50s are almost certainly too optimistic following its typical diurnal temperature curve, and that's very probably not appropriate given overcast and persistent NE winds. Plenty of room to go lower on temps in future updates but potential exists for widespread upper 30s to mid 40s with NE winds Thurs around 10-15 mph. Temps probably not going very far either Thurs night or Fri with highs in the mid 40s, with a better shot at widespread rain Fri as a cool front moves in from NY.
We again repeat the same weather pattern Sat as the same one from Thurs, with shallow cool air on NE winds and persistent low clouds under a continued mild profile of air aloft.
CT: None
MA: None
RI: None
MARINE: Small Craft Advisory until 8 PM EDT Monday for ANZ230-236. Small Craft Advisory until 11 PM EDT Monday for ANZ231-250-251. Small Craft Advisory until 2 AM EDT Tuesday for ANZ232>234. Small Craft Advisory until 8 AM EDT Tuesday for ANZ235-237-254>256.
MA: None
RI: None
MARINE: Small Craft Advisory until 8 PM EDT Monday for ANZ230-236. Small Craft Advisory until 11 PM EDT Monday for ANZ231-250-251. Small Craft Advisory until 2 AM EDT Tuesday for ANZ232>234. Small Craft Advisory until 8 AM EDT Tuesday for ANZ235-237-254>256.
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