Aug 28, 2012: Brief Cool To Brief Heat

Forecast Highlights:

– Cooler temperatures return for tonight-Thurs morning
– Surge of heat briefly comes in on Fri, possibly Sat
– Uncertainty with Isaac’s remnants for longer range


Tuesday, August 28 Observations:

Scattered showers affected the area after midnight with a line of heavier showers and thunderstorms coming through early in the morning hours associated with a cold front moving through. Clearing skies were observed later in the day behind the cold front with highs reaching the low to mid 80s inland and the mid to upper 80s across the rest of the area. The highest temperature was 89 degrees in Newark.

Tonight – Wed Night: Briefly Chilly

A high pressure will move into the region from the NW, resulting in mainly clear cloud cover and a cooler air mass with 850mb temperatures down to at least 10C, which will allow for cooler temperatures tonight through early Thursday. Lows tonight will drop into the mid 50s to lower 60s for most places north/west of NYC, with low 50s inland and low-mid 60s in NYC. Mainly sunny skies are expected for Wednesday with highs in the upper 70s to low 80s.

The coolest temperatures are expected for Wednesday night, with a similar set up expected again. Temperatures will quickly drop overnight with clear skies, with widespread lows in the low to mid 50s expected away from NYC. The immediate north/west suburbs will see lows in the upper 50s, with low 60s expected in NYC. The coldest temperatures will be in the interior areas, where lows are expected to drop into the upper 40s, perhaps a bit lower.

Thursday – Beyond: Briefly Hot, Then Cooler

A brief surge of heat will move into the region late on Thursday into Friday, resulting in a quick and significant warm up. Highs on Thursday are expected to reach the mid to upper 80s across most of the area, a bit cooler in Long Island/S CT, with highs on Friday reaching the upper 80s to lower 90s from NYC and further north/west and the mid 80s to lower 90s in Long Island/S CT.

The cold front now appears to move through faster than originally expected, which will likely push the heat south for Saturday and into the early week while delaying Isaac’s remnants a bit. Cloud cover may increase towards Sunday and/or early next week as Isaac’s remnants likely move into the region, although the exact timing and location remain uncertain. Stay tuned for more information regarding Isaac’s remnants and how they affect the region.

4 thoughts on “Aug 28, 2012: Brief Cool To Brief Heat

    • NYC Weather Reply

      There is on average at least some severe weather in September, although severe weather is usually less frequent than it is during the summer months. Thunderstorms will take place this month, but there is a lower probability of widespread severe weather outbreaks.

  1. Anonymous Reply

    But last year in 2010 and 2011, there was some severe weather in september 2010 and also in 2011

    • NYC Weather Reply

      The frequency of severe weather noticeably decreases in September compared to June-August; 2010 was more active than usual, and 2011 only had a single minor severe storm event. It is impossible to predict exactly how many, if any severe weather outbreaks will take place this month, but climatology favors few, and usually more isolated rather than widespread as in region-wide.

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