Sept 15, 2013: Chilly Start To Week

Forecast Highlights:

temp39A high pressure remains placed near the region today, with chilly temperatures observed this morning. The chilly pattern will continue through the middle of the week, with frost possible inland. A warming trend will take place for the late week with temperatures rebounding back to average along with another risk of storms towards next weekend. (Image credit: PSU e-Wall)




Today – Tuesday Night: Chilly Pattern Continues; 30s Inland

The high pressure that provided the region with chilly temperatures yesterday and last night has since moved offshore, with a southwest flow today bringing slightly warmer temperatures aloft but with a lack of significant warming in the surface, with highs still struggling to pass the low 70s. A trough currently over the Great Lakes will swing into the region for Monday and Tuesday, with the cold front moving through the area on Monday morning; temperatures overnight will not be nearly as cold as tonight as clouds spread into the area, with a few hour period of light rain showers expected for most of the area on Monday morning before 8-11 AM. The afternoon and evening hours are expected to be mostly to possibly partly cloudy with a continued risk of isolated showers, especially north and NW of NYC.

A stronger cool air mass will enter the region for Monday night into Tuesday, with clearing skies and lows overnight falling into the upper 30s-low 40s inland, mid to possibly upper 40s in the north/west suburbs of NYC and southern CT, upper 40s to low 50s in Long Island, and low 50s in NYC. Sunny skies are expected for Tuesday with highs only rising into the low-mid 60s inland and the mid to upper 60s for the rest of the area, with overnight lows falling into the mid to upper 30s inland, low to mid 40s in north/west suburbs of NYC and interior Long Island, and the upper 40s to low 50s in NYC and the immediate coast. There is a possibility that Central Park falls below 50 degrees; the last time this happened in September was in 2009. The possibility is there for areas of frost towards NW NJ and interior SE NY, and this has been accordingly mentioned in the Weather Hazards and 7-Day Forecast pages.


Wednesday – Next Weekend: Warming Up, Then Storms Possible

As the high pressure slides east of the area, mostly sunny skies will continue through Wednesday and Thursday as temperatures gradually warm, reaching the upper 60s-low 70s on Wednesday and the mid-upper 70s on Thursday. Friday is expected to be the warmest day, with partly sunny skies and highs possibly reaching 80 degrees in northeast NJ. The next cold front is expected to affect the region towards Saturday and/or Sunday with scattered showers and thunderstorms possible with the frontal passage, followed by a return to near-below average temperatures for early next week. More information will be posted on the weekend outlook over the next few days.


<< Sept 12 | Sept 13 | Sept 14 | Sept 15 >>

Friday, September 13 Observations:

9.13.13Behind the frontal passage on Thursday, cooler temperatures returned into the area with partly to mostly cloudy skies, and isolated afternoon thunderstorms, especially towards Westchester county and parts of southern CT. Highs continued the gradual cooling trend, peaking in the low to mid 70s inland and the mid to upper 70s for the rest of the area. The highest temperature was 80 degrees in JFK airport, and the coolest high temperature was 73 degrees in Sussex, NJ and Morristown, NJ.


Saturday, September 14 Observations:


The strong trough on Friday spread into the area on Saturday, with the coolest day so far this fall observed just after one of the hottest days of the year; widespread highs in the 60s were observed, only 3 days after most of the area surged into the 90s with 97 degrees in Teterboro and heat index values in the 100s. More cloud cover than forecast was observed with mostly cloudy skies, which kept high temperatures slightly cooler than forecast, peaking in the low to mid 60s inland and the mid to upper 60s for the rest of the area. The highest temperature was 71 degrees in New London, CT, and the coolest high temperature was 61 degrees in Sussex, NJ.

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