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May 2011 NYC metro area obs./discussion


tmagan

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Clouded over to overcast toward mid-afternoon/evening. Perfect day falls short of sunset which won't be seen - a full deck of stratocu is not that gorgeous (even overheard some people at the park asking if it was going to rain) - the temperatures though have been comfortable... besides the east end which is experiencing the showers and temps in the 50's. So area-wide, not that great.

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Another wonderful spring day in Westchester, got out to play tennis with my dad and also did some garden work.

High of 70.9F after a low of 48.3F, mixture of sun and clouds which gave way to thick overcast by late afternoon/early evening. Cloudy now at 64/48....

I disagree that everyone is going to be stuck in the 60s Wednesday, we've got warmer 850s advecting towards the region so I think the warmer spots to the SW, which will be less influenced by cloud cover from the ULL, should see 70-75F readings:

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Another gorgeous day in Westchester.

FEW

67/44

Yeah man absolutely ideal stretch of weather. Went to the driving range yesterday and it was gorgeous.

Great sleeping too, have been in the 40s every night.

5/5: 65/42

5/6: 71/37

5/7: 71/49

5/8: 73/43

5/9: 70/46

Currently at the high for the day, 70.0F with dew points near 40. Just glorious.

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Speaking of dry, the following were obs. taken at Lamarr, Co. over the last 3 hours:

NCAR-RAP Real-Time Weather Data

Output produced by METARs form (09 May 2011 22:41 UTC)

found at http://www.rap.ucar.edu/weather/surface/

Conditions at: KLAA observed 09 May 2011 21:53 UTC Temperature: 33.3°C (92°F) Dewpoint: -27.2°C (-17°F) [RH = 1%] Pressure (altimeter): 29.40 inches Hg (995.7 mb)

[sea-level pressure: 990.3 mb] Winds: from the SSW (210 degrees) at 29 MPH (25 knots; 13.0 m/s)

gusting to 37 MPH (32 knots; 16.6 m/s) Visibility: 10 or more miles (16+ km) Ceiling: at least 12,000 feet AGL Clouds: sky clear below 12,000 feet AGL Present Weather: automated observation with no human augmentation;

there may or may not be significant weather present at this time KLAA 092153Z AUTO 21025G32KT 10SM CLR 33/M27 A2940 RMK AO2 PK WND 21032/2152 SLP903 T03331272

Conditions at: KLAA observed 09 May 2011 20:53 UTC Temperature: 33.9°C (93°F) Dewpoint: -26.1°C (-15°F) [RH = 1%] Pressure (altimeter): 29.43 inches Hg (996.7 mb)

[sea-level pressure: 991.2 mb] Winds: from the SSW (210 degrees) at 18 MPH (16 knots; 8.3 m/s)

gusting to 33 MPH (29 knots; 15.1 m/s) Visibility: 10 or more miles (16+ km) Ceiling: at least 12,000 feet AGL Clouds: sky clear below 12,000 feet AGL Present Weather: automated observation with no human augmentation;

there may or may not be significant weather present at this time KLAA 092053Z AUTO 21016G29KT 170V240 10SM CLR 34/M26 A2943 RMK AO2 PK WND 24029/2053 SLP912 T03391261 56031

Conditions at: KLAA observed 09 May 2011 19:53 UTC Temperature: 33.9°C (93°F) Dewpoint: -26.7°C (-16°F) [RH = 1%] Pressure (altimeter): 29.46 inches Hg (997.7 mb)

[sea-level pressure: 992.4 mb] Winds: from the SSW (210 degrees) at 15 MPH (13 knots; 6.8 m/s)

gusting to 30 MPH (26 knots; 13.5 m/s) Visibility: 10 or more miles (16+ km) Ceiling: at least 12,000 feet AGL Clouds: sky clear below 12,000 feet AGL Present Weather: automated observation with no human augmentation;

there may or may not be significant weather present at this time KLAA 091953Z AUTO 21013G26KT 10SM CLR 34/M27 A2946 RMK AO2 PK WND 22026/1951 SLP924 T03391267

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Beautiful day today. The low-level flow looks little more N-NNE tomorrow and Wednesday. So I think high temps will be between 65-75F range, from NE to SW, across the area.

Yes, I don't think we'll get too warm Tuesday or Wednesday because winds are N, even veering towards NE at times, so we don't have much downsloping to worry about. Thursday may be well into the 70s for most locations given that the WAA is becoming stronger with 10C 850s approaching the region.

Today was just a quintessential spring day, warm sunshine and extremely low humidity. It's just been an absolute joy to be alive lately, amidst a landscape full of fragrant lilacs, vivid white and pink dogwoods, and lush maple-beech forest. I'm seeing advances in my vegetable garden daily, arugula should be ready for a 2nd harvest by later next week, tomatoes have perked up fast, and beans have surfaced from beneath the soil of their containers. High of 68.9F downtown after a low of 51.7F....currently 61.6/41 in Southern Westchester with another deliciously crisp evening on the way. I've really enjoyed how refreshing the nights have been with the low humidity enhancing the diurnal range.

Tuesday, Wednesday, and Thursday all look to be around 70/45 here in Westchester, just perfection. We may even see a sunny day Friday as the GFS has been gradually slowing down the frontal passage, giving us some more time in the clear. Wonderful spring!

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Yes, I don't think we'll get too warm Tuesday or Wednesday because winds are N, even veering towards NE at times,

I'd agree for NELY winds, but I wouldn't use NLY winds to argue against warmth in the high sun months of May-August. I recall many more 90F or > days with due northerly winds than SLY or even SSWLY. Also, many of our intense heat days come with N winds, and RH values are almost always low.

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I'd agree for NELY winds, but I wouldn't use NLY winds to argue against warmth in the high sun months of May-August. I recall many more 90F or > days with due northerly winds than SLY or even SSWLY. Also, many of our intense heat days come with N winds, and RH values are almost always low.

It's hard to achieve too much warmth this week because the northerly flow at all levels of the atmosphere behind the Atlantic ULL is keeping 850mb temperatures around +5C until the front approaches, at which point it becomes milder. That's what I meant, and I think it's pretty clear that the north winds behind the storm are keeping the heat ridge over the Midwest out of the NYC metro area; if we started seeing SWlies with that big heat ridge, we'd probably be in the mid-upper 80s instead of low 70s. I could see inland areas of the region becoming surprisingly warm on Friday/Saturday if we stay out of the clouds and showers. Although south winds will undoubtedly bring a sea breeze to LI and Brooklyn/Staten Island, sites like EWR might get up to 75F or so...850s are close to 10C at that point.

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Yes, I don't think we'll get too warm Tuesday or Wednesday because winds are N, even veering towards NE at times, so we don't have much downsloping to worry about. Thursday may be well into the 70s for most locations given that the WAA is becoming stronger with 10C 850s approaching the region.

Today was just a quintessential spring day, warm sunshine and extremely low humidity. It's just been an absolute joy to be alive lately, amidst a landscape full of fragrant lilacs, vivid white and pink dogwoods, and lush maple-beech forest. I'm seeing advances in my vegetable garden daily, arugula should be ready for a 2nd harvest by later next week, tomatoes have perked up fast, and beans have surfaced from beneath the soil of their containers. High of 68.9F downtown after a low of 51.7F....currently 61.6/41 in Southern Westchester with another deliciously crisp evening on the way. I've really enjoyed how refreshing the nights have been with the low humidity enhancing the diurnal range.

Tuesday, Wednesday, and Thursday all look to be around 70/45 here in Westchester, just perfection. We may even see a sunny day Friday as the GFS has been gradually slowing down the frontal passage, giving us some more time in the clear. Wonderful spring!

We had northerly winds all day today and got up to 71 F in NYC, and it is still in the 60s. So, what?

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It's hard to achieve too much warmth this week because the northerly flow at all levels of the atmosphere behind the Atlantic ULL is keeping 850mb temperatures around +5C until the front approaches, at which point it becomes milder. That's what I meant, and I think it's pretty clear that the north winds behind the storm are keeping the heat ridge over the Midwest out of the NYC metro area; if we started seeing SWlies with that big heat ridge, we'd probably be in the mid-upper 80s instead of low 70s. I could see inland areas of the region becoming surprisingly warm on Friday/Saturday if we stay out of the clouds and showers. Although south winds will undoubtedly bring a sea breeze to LI and Brooklyn/Staten Island, sites like EWR might get up to 75F or so...850s are close to 10C at that point.

Yeah I figured that's what you meant. The northerly winds are not the reason for the cooler temps, it's the ULL which is preventing warmer 850s from moving in as you noted. If we had high 850mb temps with northerly winds under a heat ridge, that's a recipe for 90-95+ degree heat in the summer months.

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We had northerly winds all day today and got up to 71 F in NYC, and it is still in the 60s. So, what?

I meant that it wouldn't get ridiculously hot, and it didn't. 71F is only +3 for the high temperature, certainly not a torch. Manhattan is in the mid-upper 60s today, right around normal for mid-May. Northerly winds at all levels of the atmosphere are preventing warmer air from the ridge over the Southern Plains from being advected into NYC metro.

Just gorgeous here in Tarrytown, where I'm substitute teaching today...went out for a coffee an hour ago, was a delight to be outside. Can't wait to get home and work in the garden this afternoon. Currently 66.2/42 and clear.

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Does it get any better than this? I walked in the city and the air was so clear and crisp. The park looked great and there were tons of people out. I wish I can lock in this weather for the duration of the warm season the same way you can lock in oil prices for your home :)

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we will have a low cloud bank close to use tomorrow

f30.gif

the gfs is a spectral model, and cannot resolve elevation differences as well as the nam, which is a gridpoint model... hopefully, this means the nam is better resolving the effects of downsloping

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I meant that it wouldn't get ridiculously hot, and it didn't. 71F is only +3 for the high temperature, certainly not a torch. Manhattan is in the mid-upper 60s today, right around normal for mid-May. Northerly winds at all levels of the atmosphere are preventing warmer air from the ridge over the Southern Plains from being advected into NYC metro.

Just gorgeous here in Tarrytown, where I'm substitute teaching today...went out for a coffee an hour ago, was a delight to be outside. Can't wait to get home and work in the garden this afternoon. Currently 66.2/42 and clear.

I've sen it get very hot on northerly winds, but it's usually in the summer, when the heat overcomes the pattern and rises over the top of the high-- that's one of my favorite patterns as it means 0 chance of a sea breeze :)

This kind of pattern late in the summer would produce a much different result.

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Does it get any better than this? I walked in the city and the air was so clear and crisp. The park looked great and there were tons of people out. I wish I can lock in this weather for the duration of the warm season the same way you can lock in oil prices for your home :)

I want this pattern late in the summer, because heat will overwhelm the pattern and even northerly winds would produce a heat wave without a sea breeze :) even in September ;)

Very hot, very dry, crystal clear skies with no haze = perfect summer weather :)

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Quick drop in temperatures here on the South Shore with the sea breeze today.

BW what caused the wind to flip to the south? The northerly breeze was rather stiff today. Probably the large temp difference with the water? In the summer, with such a strong northerly wind, it would have been difficult to get it to flip.

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