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May 2019 General Discussions & Observations Thread


Rtd208
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Just now, 495weatherguy said:

Not wasting time or energy.   We have had many back door fronts which have really ruined spring.  The little league season has been challenging—cancellations galore. Sun has been in short supply on LI.  

I have 200 tomato plants waiting to go in the ground, getting all rootbound and leggy in their cold frame. For years now I've been successfully planting outdoors the first few days of May. I don't see it happening now until at least Thursday, maybe later. Would have started everything three weeks later if I knew then what I know now.

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2 minutes ago, Juliancolton said:

I have 200 tomato plants waiting to go in the ground, getting all rootbound and leggy in their cold frame. For years now I've been successfully planting outdoors the first few days of May. I don't see it happening now until at least Thursday, maybe later. Would have started everything three weeks later if I knew then what I know now.

A Challenging spring for all.  Usually by now it’s shorts and t shirts on the weekend, instead it’s sweatpants and sweatshirts.  It’s 45 degrees, raining and a real feel of 38.  Not fun

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13 minutes ago, 495weatherguy said:

A Challenging spring for all.  Usually by now it’s shorts and t shirts on the weekend, instead it’s sweatpants and sweatshirts.  It’s 45 degrees, raining and a real feel of 38.  Not fun

South Shore sections of Long Island haven’t made it much past 70 degrees yet. This is the 2nd coldest spring maximum temperature 3/1-5/12 in modern times. Matches the recent pattern of muted high temperatures from rain,clouds, and cool easterly backdoor flow.

Time Series Summary for ISLIP-LI MACARTHUR AP, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Ending Date
Highest Max Temperature Mar 1 to May 12
Missing Count
1 1984-05-12 69 0
- 1978-05-12 69 0
2 2019-05-12 71 1
- 1995-05-12 71 0
3 1988-05-12 72 0
- 1975-05-12 72 1
- 1966-05-12 72 0
4 1989-05-12 73 0
- 1968-05-12 73 0
5 1992-05-12 75 0
- 1969-05-12 75 0
12 1997-05-12 76 0
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1 hour ago, 495weatherguy said:

A Challenging spring for all.  Usually by now it’s shorts and t shirts on the weekend, instead it’s sweatpants and sweatshirts.  It’s 45 degrees, raining and a real feel of 38.  Not fun

We've had much colder springs than this though, but it's the mix of really raw days that make a difference.

Maybe the warm guidance is right for next weekend, and if so, we'll quickly forget days like today. Once this pattern breaks down I think we roast into the 90s. 

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7 minutes ago, SnoSki14 said:

We've had much colder springs than this though, but it's the mix of really raw days that make a difference.

Maybe the warm guidance is right for next weekend, and if so, we'll quickly forget days like today. Once this pattern breaks down I think we roast into the 90s. 

From your mouth to gods ears regarding the warmth

I don’t necessarily agree with much colder springs.  Long Island has been cold, clammy and cloudy

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2 hours ago, 495weatherguy said:

The weather on Long Island is vastly different from yours.  We have had many more days of clouds and rain than up by you

What are you talking about? 22 out of 30 days in April it rained and I've only had one complete 24 hour period this month without some precip. Everything is soggy and moldy, trees are flopping over on hillsides because it's so wet, the overflow dams on the Croton River system haven't stopped running yet this month and only for a couple of hours here and there in April. I've been emptying the dehumidifier in my basement 2 or 3 times a day for the last 6 weeks and the bugs are HUGE already. You haven't been any more wet than we have here.

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8 minutes ago, gravitylover said:

What are you talking about? 22 out of 30 days in April it rained and I've only had one complete 24 hour period this month without some precip. Everything is soggy and moldy, trees are flopping over on hillsides because it's so wet, the overflow dams on the Croton River system haven't stopped running yet this month and only for a couple of hours here and there in April. I've been emptying the dehumidifier in my basement 2 or 3 times a day for the last 6 weeks and the bugs are HUGE already. You haven't been any more wet than we have here.

I’m not trying to argue with you nor do I refute what you say.  However, we get a cold easterly fetch off of the cold ocean in setups like the past 6 weeks.  Raw is the best word to describe our spring.  Yesterday was great; I couldn’t tell you the last time we had 3 or 4 sunny, precipitation free days in a row.  

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Today, Central Park recorded a temperature of 45°. That's the coldest reading this late in the season since May 13, 2017 when the temperature fell to 45°. Outside New York City and into New England, even colder readings were reported. Low temperatures from select sites included: Danbury: 41°; Hartford: 40°; Pittsfield, MA: 38°; Poughkeepsie: 42°; White Plains: 43°; and, Worcester: 36°. Parts of New England even saw some snowfall reported.

Today's rainstorm set a new daily precipitation record at Allentown where 1.47" was recorded. The old record was 1.43", which was set in 1974.

With today's rainfall, New York City's total rainfall for 2019 is 18.10" (0.97" above normal). Based on the 1971-2018 period, there is an implied 56% probability that New York City will receive 50.00" or more precipitation this year.

Another storm could bring a general 0.50" to 1.00" rain to the region tomorrow and tomorrow night.

The ENSO Region 1+2 anomaly was 0.3°C and the Region 3.4 anomaly was +0.9°C for the week centered around May 1. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +0.07°C and the ENSO Region 3.4 anomaly has averaged +0.90°C. Conditions consistent with El Niño appear likely to persist through May in Region 3.4.

The SOI was -21.74 today.

Today's preliminary value of the Arctic Oscillation (AO) was -1.608. Periods when the AO has been at or below -1.500 during the first 10 days of May have typically coincided with readings that are 1.0°-2.5° below normal during the May 11-20 period. The average temperature during the May 11-20, 1981-2010 period was 62.3°. Previously, the modeled figure was as low as 57.3°, which was below what is typical during such patterns and implied a sharper rebound in temperatures toward the end of the period than shown on the guidance. The guidance has now moved in that direction with its showing temperatures reaching the upper 70s as far north as the northern Mid-Atlantic region.

Overall, the sensitivity analysis applied to the latest guidance suggests that the probability of a warmer than normal May has risen to 46%.

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6 hours ago, 495weatherguy said:

From your mouth to gods ears regarding the warmth

I don’t necessarily agree with much colder springs.  Long Island has been cold, clammy and cloudy

Near normal temperatures though, April was AN. May could end up AN if the warmer guidance is correct.

But that doesn't mean much if it's cloudy/rainy for a large chunk of the time. Max temps have been BN too.

Fingers crossed we don't see a repeat of this pattern Memorial day weekend. I could see how things turn very warm for a few days only to revert back to this colder, easterly flow pattern.

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13 hours ago, 495weatherguy said:

A Challenging spring for all.  Usually by now it’s shorts and t shirts on the weekend, instead it’s sweatpants and sweatshirts.  It’s 45 degrees, raining and a real feel of 38.  Not fun

..both digital weather stations have me @ 43* under cloudy miserable conditions.

another rainy day on tap for today..if this crap doesn't stop i may have to quote

george costanza..." I'm freaking out Jerry"...

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2 minutes ago, tim said:

..both digital weather stations have me @ 43* under cloudy miserable conditions.

another rainy day on tap for today..if this crap doesn't stop i may have to quote

george costanza..." I'm freaking out Jerry"...

We just aren’t used to cool temperatures during the warm season this decade. A whopping 80%+ of all May-Sep months this decade have been warmer than average. 

https://mobile.twitter.com/Climatologist49/status/1126293596909367301

2F9A14A7-4EAC-446E-9C47-4BC2E4AD0A0D.jpeg.8bfaebd590be5dcec7f51bd855965e2d.jpeg

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35 minutes ago, bluewave said:

We just aren’t used to cool temperatures during the warm season this decade. A whopping 80%+ of all May-Sep months this decade have been warmer than average. 

https://mobile.twitter.com/Climatologist49/status/1126293596909367301

2F9A14A7-4EAC-446E-9C47-4BC2E4AD0A0D.jpeg.8bfaebd590be5dcec7f51bd855965e2d.jpeg

Ok, it’s early and the caffeine hasn’t kicked in yet but isn’t there a typo in the graphic?  Is it 40 months or 100 months?

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15 minutes ago, IrishRob17 said:

Ok, it’s early and the caffeine hasn’t kicked in yet but isn’t there a typo in the graphic?  Is it 40 months or 100 months?

That is the 40 month warm season subset from the larger 100 month group in his original post.

https://mobile.twitter.com/Climatologist49/status/1126228312353722368

We have now been using 1981-2010 as the climate normal period for 100 months. This map shows the count of those 100 months with above normal temperatures in the Contiguous U.S. using station data.

Great question. Here's the subset of just the warm-season months (May-Sep) using the same color palette.

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NYC doesn't get many days that stay below 50 degrees after May 10th. Only happened 7 times. May 12th, 2010 was the last time.

Time Series Summary for NY CITY CENTRAL PARK, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Ending Date
Lowest Max Temperature May 11 to May 31
Missing Count
1 1967-05-31 46 0
2 1961-05-31 47 0
- 1882-05-31 47 0
3 2010-05-31 48 0
- 1950-05-31 48 0
4 1924-05-31 49 0
- 1914-05-31 49 0

 

2010-05-12 48 44 46.0 -15.2
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