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1/19 AM Zones Update: Unsettled pattern will continue

High pressure has built into the region this morning, and will set the table for fair weather during the remainder of the day today. Temperatures throughout the northeast are expected to remain above average, by several degrees, despite the presence of this high pressure. You can thank a modified Pacific airmass for that!

An active, unsettled pattern still looks likely to continue. The first in a series of disturbances will arrive on Friday evening. While the disturbance will be weak and relatively progressive, it does have a weak surface low pressure area and enough lift and moisture for precipitation. A few bands of showers are likely to spread north from the Mid Atlantic into the Northeast on Friday.

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All Zones AM Update: Cold morning, warmth on the way

Impressively cold air settled in to the area this morning with temperatures falling below zero in many locations. This occurred at the typically favorable radiational cooling locations such as the Pine Barrens and Central/Eastern Long Island. Westhampton Beach dropped to -9F shortly after sunset, which is extremely impressive even for this time of year! Most other areas saw single digit lows, with temperatures predictably remaining warmer in the city and other urban locations.

Temperatures will remain quite cold today with an arctic high pressure still hanging on to control of the weather pattern. Blustery winds will have calmed down this morning and afternoon, and the day is expected to be pleasant overall. Plenty of sunshine will dominate the skies early with no precipitation impacts anticipated — with a gradual trend towards more cloud cover as the day goes on. The biggest threat may be black ice which could have formed on some area roadways.

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PM All Zone Update: Rain continues, heavy at times Tuesday

An approaching storm system will bring continued drizzle and showers through tonight — with periods of steady rainfall expected on Tuesday. The disturbance affecting our area tonight is quite weak, but moisture in the atmosphere’s low levels is creating drizzle and showers. These will continue on and off for the next few hours — but accumulation is expected to be light.

Temperatures will continue warming through the morning hours as southerly winds continue. This southerly flow will be drawing more moisture into the area ahead of the stronger storm system approaching on Tuesday. An area of steady to heavy rain is expected to move through the Mid Atlantic and Northeast from the late morning to early afternoon hours, producing rainfall totals between 0.35″ and 0.50″ during its passage.

 

Simulated radar imagery valid 1:00pm on Tuesday.

Simulated radar imagery valid 1:00pm on Tuesday.

These periods of steady rain are likely to continue during the afternoon, with the heaviest rain spreading north into the northern zones of Southeast NY and Connecticut during the mid afternoon hours. As a low pressure area shifts north of the area during the day, clearing will occur from southwest to northeast through the area.

Improving weather conditions are expected after sunset, as west-northwesterly winds begin ushering in a drier and colder airmass. Breezy conditions may develop by late afternoon as the frontal boundary moves past the area. Cold air will surge into the area by Wednesday with arctic air pushing south from Canada.