John Homenuk

Monday Overview: Warming trend throughout the week

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While the frost remains on car windshields and grassy surface this morning, there is some brighter and warmer news in the future. Temperatures by the middle part of this work week will warm quite dramatically, with high temperatures again approaching and exceeding 70 F in many locations. As we look ahead, however, the rest of Monday will remain quite cold and blustery.

Low temperatures on Monday morning bottomed out in the 20’s throughout much of the interior, with a hard freeze occurring in many locations. Even in New York City, low temperatures approached freezing — although we are still awaiting official numbers. Islip, NY unofficially broke their daily low temperature record when they reached a temperature of 30 F shortly before sunrise.

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John Homenuk

Surge of cold air, first interior freeze this weekend

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A winter-like weather pattern across the Continental United States will bring the coldest air of the season to much of the Northeast this weekend. Temperatures are expected to fall below freezing during the evening and early morning hours across parts of the interior on Sunday and Monday mornings, with the first frost and freeze of the season looking increasingly likely in those areas.

The surge of cold air is being enabled by a large upper level trough, which will amplify from Canada into the Northeast States this weekend. As is typical during the winter months, a large ridge over the West Coast of the United States will help cold air dive southward to its east, into the Eastern United States. Temperatures at the surface (where we are) are expected to fall 15 to 20 degrees below normal by Monday morning.

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John Homenuk

Transitional weather will continue this week

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A pleasant weekend, in the wake of a cold front which brought heavy rain and thunderstorms to the area on Friday, brought comfortable temperatures and lots of sun. This trend will continue through the early part of the week, on Columbus Day, with temperatures moderating quite a bit. Highs will reach into the 70’s once again as southerly winds return to the forecast.

These southerly winds will increase through Tuesday, as a mid level atmospheric disturbance begins to swing toward the area from the North Central Plains. Forecast models had previously suggested some chance that this disturbance could become entrenched in our area, bringing unsettled weather and rain chances this week. But it appears likely that the disturbance will instead remain progressive, with a cold front crossing the area on Tuesday afternoon.

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John Homenuk

Heavy rain, thunderstorms transition into crisp weekend

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Southwesterly winds have ushered in a warmer, more humid airmass this Friday morning. Temperatures are running in the mid 60’s throughout the area with low clouds and fog in the valleys and even some of the higher elevations of Northern NJ and Southeast NY. The southwesterly flow will continue to build into Friday afternoon, ahead of an approaching cold front. The warmer, more humid air will lead to increasing atmospheric instability by later this afternoon.

This instability, expanding from Southeast Pennsylvania into New York, will briefly align with favorable atmospheric shear parameters as a cold front approaches from the west this afternoon. In this area, a few strong to severe thunderstorms are likely moving from west to east through New Jersey, Southeast New York, Connecticut and potentially the NYC Metro Area.

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