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July 2025 Discussion-OBS - seasonable summer variability


wdrag
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18 minutes ago, bluewave said:

These smoke forecasts from the models vary quite a bit from run to run. So it’s much more of a trial and error process. Always have to check in the mornings to see how close to reality the HRRR and other models are doing.

The clouds are way more of a problem than any smoke, it shot up to 95 here 30 minutes ago but it's been mostly cloudy since then and temperatures have dropped, even on a land breeze day, the clouds screwed us out of 100 today.

Now I see why 100 degrees was much more common for the city and here between 1944-1966, it was much less cloudy and moist back then.

I will say this is a busted forecast because NO ONE expected it to be cloudy today in the afternoon.

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23 minutes ago, LibertyBell said:

The clouds are way more of a problem than any smoke, it shot up to 95 here 30 minutes ago but it's been mostly cloudy since then and temperatures have dropped, even on a land breeze day, the clouds screwed us out of 100 today.

Now I see why 100 degrees was much more common for the city and here between 1944-1966, it was much less cloudy and moist back then.

I will say this is a busted forecast because NO ONE expected it to be cloudy today in the afternoon.

None of the models had 100° today anyway. The heat was always expected to peak Tuesday into Wednesday.

Smoke only becomes an issue for temperatures when it’s thick enough. Even then the effect would only be a degree or two unless we have June 2023 levels which was historic due to the magnitude and closeness of the wildfires in Canada.

The current wildfires are further away in Canada so it hasn’t been as thick as 2023. But a few days ago the low level smoke was thick enough to drop the air quality.

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Today and Wednesday (30th) are the only two days of the year where four years share the record high for NYC. Today (97) is 1892, 1931, 1949 and 1999. For Wednesday 30th (98) the four years sharing the record are 1917, 1933, 1940 and 1988. In between on 29th, 1949 (99F) has sole possession. 

There are eight days during the year where the record high is shared by three years. Two of these fall on Aug 18 and 19 during the next notable relatively cool spell for record highs (97 is tops for Aug 15 to 25, the two three-way ties are both 94).

In between the two relatively cool intervals, July 31 to Aug 14 average record high is 99.8 F. Then again, from Aug 26 to Sep 3 the average returns to 100F, but most of those records are from two years, 1948 then 1953 (1929 had 99F on Sep 3). 

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5 hours ago, LibertyBell said:

I hope this is a sign of a new global pattern of reduced sea breezes.  Maybe as we all heat up, oceans and land alike, sea breezes will be much less common.

Well the ridge axis has been further west than recent years. Recent summers it has been east of New England with more onshore flow. So this is why places like JFK have seen more 100° days with the increased westerly flow. 

IMG_4227.gif.cefc93eb0eb8b9ee6e6e176c513157a4.gif

 

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44 minutes ago, bluewave said:

None of the models had 100° today anyway. The heat was always expected to peak Tuesday into Wednesday.

Smoke only becomes an issue for temperatures when it’s thick enough. Even then the effect would only be a degree or two unless we have June 2023 levels which was historic due to the magnitude and closeness of the wildfires in Canada.

The current wildfires are further away in Canada so it hasn’t been as thick as 2023. But a few days ago the low level smoke was thick enough to drop the air quality.

and when the smoke was very thick it dropped air temperatures by a few degrees..

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28 minutes ago, bluewave said:

Well the ridge axis has been further west than recent years. Recent summers it has been east of New England with more onshore flow. So this is why places like JFK have seen more 100° days with the increased westerly flow. 

IMG_4227.gif.cefc93eb0eb8b9ee6e6e176c513157a4.gif

 

yes hopefully it's a cycle that's resetting itself.

there are many global cycles, probably many more than we know about.

 

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40 minutes ago, Roger Smith said:

Today and Wednesday (30th) are the only two days of the year where four years share the record high for NYC. Today (97) is 1892, 1931, 1949 and 1999. For Wednesday 30th (98) the four years sharing the record are 1917, 1933, 1940 and 1988. In between on 29th, 1949 (99F) has sole possession. 

There are eight days during the year where the record high is shared by three years. Two of these fall on Aug 18 and 19 during the next notable relatively cool spell for record highs (97 is tops for Aug 15 to 25, the two three-way ties are both 94).

In between the two relatively cool intervals, July 31 to Aug 14 average record high is 99.8 F. Then again, from Aug 26 to Sep 3 the average returns to 100F, but most of those records are from two years, 1948 then 1953 (1929 had 99F on Sep 3). 

so much extreme heat in those years: 1944, 1948, 1949, 1953, 1955, 1966

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47 minutes ago, bluewave said:

None of the models had 100° today anyway. The heat was always expected to peak Tuesday into Wednesday.

Smoke only becomes an issue for temperatures when it’s thick enough. Even then the effect would only be a degree or two unless we have June 2023 levels which was historic due to the magnitude and closeness of the wildfires in Canada.

The current wildfires are further away in Canada so it hasn’t been as thick as 2023. But a few days ago the low level smoke was thick enough to drop the air quality.

Do you think EWR still has a shot at 100 today? It looks like everyone will fall a few degrees short.

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17 minutes ago, jm1220 said:

Up to 95. Doesn’t feel atrocious but still pretty damn hot. 

Yeah, 2nd warmest summer on record so far for Long Island with numerous top 10s since 2010.

Time Series Summary for JFK INTERNATIONAL AIRPORT, NY Warmest June 1st- July 27th
Click column heading to sort ascending, click again to sort descending.
1 2010-07-27 77.8 0
2 2025-07-27 75.9 0
3 2011-07-27 75.8 0
4 2024-07-27 75.6 0
5 2008-07-27 75.2 0
- 1948-07-27 75.2 46
6 2020-07-27 75.1 0
7 2016-07-27 75.0 0
- 2013-07-27 75.0 0
- 1994-07-27 75.0 0
8 1983-07-27 74.9 0
9 2012-07-27 74.7 0
- 1949-07-27 74.7 0
10 1999-07-27 74.6 0
- 1991-07-27 74.6 0
- 1952-07-27 74.6 0

 

Time Series Summary for ISLIP-LI MACARTHUR AP, NY Warmest June 1st-July 27th
Click column heading to sort ascending, click again to sort descending.
1 2010-07-27 75.0 0
- 1999-07-27 75.0 0
2 2025-07-27 74.9 0
3 2024-07-27 74.3 0
4 2013-07-27 74.1 0
- 1994-07-27 74.1 0
5 2020-07-27 73.8 0
6 2011-07-27 73.7 0
7 2008-07-27 73.6 0
8 2019-07-27 73.5 0
9 1966-07-27 73.0 0
10 2014-07-27 72.9 0
- 1991-07-27 72.9 0


 

 

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Don's pre-summer outlook of a statistically significantly warmer than normal summer looks like it will come to pass with June-July at KEWR top 6.  Very good statistical call barring a chilly August.

Waiting on a thread til tomorrow morning for two 100F days at KEWR,  (for me unexpected in lae June),  to be followed by a potential widespread 1-4" forum rainfall with iso 8"... EPS through 12z/28 cycle continues strong on this, though edging northward.  I also have to think there has to be a stripe of svr near the boundary Thursday?   Just too early for me to be sure the EPS is going to be mostly correct.  From what I can tell, WPC is so far,  accepting the EPS solution. 

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3 hours ago, winterwx21 said:

Euro now brings the 90s back early to mid next week. Looks like a break for a few days and then we go back to the heat. 

It's 94 with a dewpoint of 67 here right now. Doesn't feel terrible today. 

95 was my high with dews in upper 70s. Peak heat index was 108

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