NYC Weekend Weather – Jun 13, 2019

A cold front that pushed through overnight leaves us with some cool, crisp air to start the weekend. The first half of the weekend will be characterized by plenty of sun before a slow moving frontal system approaches later in the weekend. This will bring back chances for showers and thunderstorms going into next week when it appears an active weather pattern could take root.

Rest of today – mostly sunny with high temperatures in the mid-70s. A post-frontal trough may touch off a few isolated storms later in the afternoon. Overnight lows in the low-60s.

Weather Prediction Center surface forecast for 8AM Saturday, showing high pressure off the coast of NC

Saturday – mostly sunny with highs in the low-80s. High pressure takes hold off the Southeast US coast, with clockwise return flow bringing some warmer air this way. Overnight lows in the low-60s.

Sunday – with a frontal boundary approaching from the northwest, clouds increase and chances for showers and thunderstorms do also. High temperatures should still be mild in the low-80s. As the Overnight lows in the mid-60s with rain chances continuing.

NAM output of 1000-500 mb thickness, surface pressure and precipitation for 8PM Sunday.

Monday – the frontal boundary that approaches from the northwest weakens and stalls out. This is partly due to flow at the upper levels flattening out/becoming somewhat parallel to the front’s orientation, and partly due to the high pressure that by this time will become anchored over Bermuda. Multiple waves of low pressure are forecast to move along this stalled front bringing another day that holds chances for showers and thunderstorms. Prolonged southwest/westerly flow ahead of the cold front which really slows down should allow temperatures to reach the mid-80s despite more cloud cover and precipitation. Overnight lows in the upper-60s with yet more rain possible.

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