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July 2013 Observations and Discussions


bluewave

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NYC with a temp of 66 at 2PM..18 below normal at this time of the day,(typically the hottest time of the year) thats more impressive then the 95 at 2 pm last week.

 

 

It is quite cool and we had similar day last year with such cool in a month of warmth. The monthly departures of between 4 and 5 are most impressive for July (hottest month) and 4 years in a row as well of some nextremely warm July's. 

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Looks like it could be our coolest july day since 2007 and first sub 70 day in at least 9 or 10 years (I went back to 2000 and found a bunch of 70 degree days at ewr but none below 70)

 I remember July 1964's hot and cool spells...If we had weather like that today it would make headlines...

7/1......99 degree max

7/2......91

7/3......93

7/9......63

7/13....67

7/17....90

7/18....92

7/19....91

7/24....69

7/29....91

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Today is very similar to 7-20-12 when we stayed in the 60's all day with the high right after midnight.

But last year was cooler during this time of day.

 

 

3:00 PM 61.0 °F 61.0 °F 100% 30.07 in 2.5 mi ENE 6.9 mph 18.4 mph 0.02 in Rain

Light Rain

 

http://www.wunderground.com/history/airport/KNYC/2012/7/20/DailyHistory.html?req_city=NA&req_state=NA&req_statename=NA

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Today is very similar to 7-20-12 when we stayed in the 60's all day with the high right after midnight.

But last year was cooler during this time of day.

 

 

3:00 PM 61.0 °F 61.0 °F 100% 30.07 in 2.5 mi ENE 6.9 mph 18.4 mph 0.02 in Rain

Light Rain

 

http://www.wunderground.com/history/airport/KNYC/2012/7/20/DailyHistory.html?req_city=NA&req_state=NA&req_statename=NA

at least up this way, we had a driving rainstorm that day temps stayed around 60 the whole day...up to 65 here today, warmest since midnight.

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you called for august to be the warmest month relative to average in your summer outlook

 

I think the second half of august into September could turn very warm. Generally the +SSTA signal in the NW Atlantic has its strongest correlation in the late aug-late sept period.

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The impressive thing about today was not only the coolness, but the lack of moisture, too. It's pretty rare to get a day in July with temps in the mid 60s with dews in the low 50s. Usually it takes a driving rainstorm with a hardcore onshore flow to keep the air this cool.

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Latest ECMWF ensembles for the first week of August have the mean trough in the Northeast. Recall a week ago when the GFS ensembles were insistent on the WAR resisting the trough in the Northeast. However, the GFS guidance has since trended toward the ECMWF ensembles which have always had the further east displaced WAR for the July 25th-August 5th period. What happens after the first week of August is up for debate, but given pattern persistence, lack of strong global signaling, and stable SSTA pattern in the Atlantic, it is very possible that the high humidity returns for later in August into September as I mentioned. Although there are subtle indications of the ridge retrogression by August 10th, I think that's probably rushing it too much as usually tends to be the case. We may see a situation where the pattern resets at 3-4 weeks intervals. We were cool late May-late June, hot/humid June 20-July 20, we'll probably be normal to below for the next 3 weeks at least, then August 20-Sept 20 could be very warm.

 

2s81q81.png

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Guest Pamela

0.26" of rain so far from the offshore storm, 5.89" so far on the month at the Mt. Sinai / Port Jeff NWS cooperative.  Rain currently falling / temp 61.2 F.

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Guest Pamela

0.26" of rain so far from the offshore storm, 5.89" so far on the month at the Mt. Sinai / Port Jeff NWS cooperative.  Rain currently falling / temp 61.2 F.

 

Up to 0.55" on the event and 6.18" on the month...headin' to work. 

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EWR, LGA, ISP, JFK and BDR all either tied or broke the daily record min max temps yesterday.

 

A similar pattern to other times this month when the min departure was warmer than the max. Just shows how

difficult it is to get record daily low temperatures around here. A -5 for a daily minimum isn't all that impressive.

TEMPERATURE (F) YESTERDAY  MAXIMUM         68    831 PM  97    1999  84    -16       85  MINIMUM         64   1111 PM  57    1953  69     -5       67  AVERAGE         66                        77    -11       76
TEMPERATURE (F) YESTERDAY  MAXIMUM         84    558 PM  98    1988  84      0       85  MINIMUM         76    925 AM  57    1898  69      7       71                                      1893  AVERAGE         80                        76      4       78
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Yesterday's high temperature in New York City was 68°. That was the first time since July 8, 2005 (66°) that the high temperature remained below 70° in NYC. It was also the first time since July 27, 2000 (68°) that the temperature remained below 70° during the July 20-31 period. Both July 26 and July 27 in 2000 had maximum temperatures below 70° on account of a storm that dumped 4.37" of rain.

 

In terms of records, yesterday's high was the second lowest maximum reading for the date. The record is 62°, which was set in 1871. That 62° reading is the second lowest maximum temperature on record for the month of July.

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Yesterday's high temperature in New York City was 68°. That was the first time since July 8, 2005 (66°) that the high temperature remained below 70° in NYC. It was also the first time since July 27, 2000 (68°) that the temperature remained below 70° during the July 20-31 period. Both July 26 and July 27 in 2000 had maximum temperatures below 70° on account of a storm that dumped 4.37" of rain.

 

In terms of records, yesterday's high was the second lowest maximum reading for the date. The record is 62°, which was set in 1871. That 62° reading is the second lowest maximum temperature on record for the month of July.

 

That's amazing that with all of the heat and very high dews that we managed to squeeze in such a cool day yesterday (even somewhat record breaking). It's sort of like an oasis in a desert.

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