Jump to content
  • Member Statistics

    17,600
    Total Members
    7,904
    Most Online
    ArlyDude
    Newest Member
    ArlyDude
    Joined

May 2021


bluewave
 Share

Recommended Posts

The next 8 days are averaging 68degs.(57/78), or about +5 0.

Less than 0.50" rain over the next 10 days.

Month to date is  57.9[-2.9].       Should be 61.7[0.0]Normal, by the 22nd.

55*(48%RH) here at 6am, m. clear.       61* by 9am.           63* by Noon.        65* at 1am.        66* by 3pm.        67* at 4pm-----cool sea breeze the culprit.         Reached 71* from 6pm to 7:30pm.        61* by Midnight.

Link to comment
Share on other sites

Morning thoughts...

Today will be partly to mostly sunny and warm. Temperatures will likely reach the middle 70s in most of the region. Likely high temperatures around the region include:

New York City (Central Park): 76°

Newark: 78°

Philadelphia: 75°

Tomorrow will be fair and continued warm. The potential exists for the last week of May to see above to much above normal temperatures. During the 1981-2010 period, New York City averaged 0.9 days on which the temperature reached 90° or above during May. During the 1991-2020 period, that figure rose slightly to 1.0 days. 

Link to comment
Share on other sites

Just to show that the GFS is not the only model shunning its daily Lithium intake, I present the GEM for your delight or fright:

The ENS for this does not even reach 80 for all 15 days of its run.        Back Door CF's could ruin any 80+++ anyway.       The last two days I have been screwed here with the sea breeze, but on Wed. I beat the City.

1620993600-yLBdyPQ4KEw.png

  • Like 1
  • Weenie 1
Link to comment
Share on other sites

Temperatures will likely top out in the 70s in much of the region through the weekend. A minor push of slightly cooler air is possible early next week before a potentially more impressive warmup unfolds.

As had been the case with April, the closing week of May could wind up warmer to much warmer than normal. In the four cases where the MJO reached Phase 1 at an amplitude of 2.000 or above in combination with a cool ENSO Region 3.4 anomaly during the May 1-10 period, as occurred this year, three wound up with warmer to much warmer than normal conditions. At New York City, the mean temperature during the closing 7 days of May was 72.7° during those three cases while it was 72.0° at Philadelphia. The 1991-2020 means were 67.9° and 69.7° respectively. Only May 25-31, 2013 (monthly ENSO Region 1+2 anomaly of -1.38°C) was cooler than normal. However, 90° heat arrived on May 29 in Philadelphia and May 30 in New York City during 2013.

The current PNA forecast provides a fresh hint of a noticeably warmer end to the month. The PNA is currently forecast by most ensemble members to fall to -1.000 or below during the second half of May. During the 1991-2020 period, the mean temperature was 65.2° in New York City and 67.0° in Philadelphia. When the PNA was -1.000 or below, the average temperature was 67.7° in New York City and 69.3° in Philadelphia.

Neutral ENSO conditions have now developed. The ENSO Region 1+2 anomaly was -0.7°C and the Region 3.4 anomaly was -0.4°C for the week centered around May 5. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.83°C and the ENSO Region 3.4 anomaly has averaged -0.42°C. Neutral ENSO conditions will likely prevail into at least mid-summer.

The SOI was +17.33 today.

The preliminary Arctic Oscillation (AO) figure was -0.526 today.

On May 12 the MJO was in Phase 2 at an amplitude of 0.886 (RMM). The May 11-adjusted amplitude was 1.011 (RMM).

In late April, the MJO moved through Phase 8 at an extreme amplitude (+3.000 or above). Only February 25, 1988 and March 18-19, 2015 had a higher amplitude at Phase 8. Both 1988 and 2015 went on to have an exceptionally warm July-August period. July-August 1988 had a mean temperature of 79.1°, which ranked 4th highest for that two-month period. July-August 2015 had a mean temperature of 78.9°, which ranked 5th highest for that two-month period. September 2015 was also the warmest September on record. The MJO's extreme passage through Phase 8 could provide the first hint of a hot summer.

Based on sensitivity analysis applied to the latest guidance, there is an implied 55% probability that New York City will have a cooler than normal May (1991-2020 normal). May will likely finish with a mean temperature near 62.5° (0.7° below normal).

 

  • Like 1
Link to comment
Share on other sites

4 hours ago, CIK62 said:

Just to show that the GFS is not the only model shunning its daily Lithium intake, I present the GEM for your delight or fright:

The ENS for this does not even reach 80 for all 15 days of its run.        Back Door CF's could ruin any 80+++ anyway.       The last two days I have been screwed here with the sea breeze, but on Wed. I beat the City.

1620993600-yLBdyPQ4KEw.png

As long as we have the deep trough NE of us over the Maritimes, I'd be suspicious of any real heat making it to NYC, or if it does it would be short lived since the backdoor will always be close by. That trough's been absurdly constant over that area this spring. 

  • Weenie 2
Link to comment
Share on other sites

On 5/13/2021 at 7:00 AM, bluewave said:

You can see how the more onshore flow since 2018 has allowed Harrison to pull ahead of Newark. During the previous years with less sea breeze activity, both stations were nearly equal in 90° days and summer maximum temperature. This reflects the record ridging near and east of New England last 3 summers producing more S to SSE flow. 

Time Series Summary for NEWARK LIBERTY INTL AP, NJ - Jan through Dec
Click column heading to sort ascending, click again to sort descending.
Year
Number of Days Max Temperature >= 90 + Max
Harrison 
2020 31     96 39     98
2019 27     99 39    101
2018 36     98 47     101
2017 22    99 23       98
2016 40    99 40     100
2015 35      98 32      99
2014 15      98 16      95
2013 25     101 25     102
2012 33     104 35      103
2011 31     108 31     107
2010 54    103* 50     106

* 2010 thermometer malfunction at Newark during hottest day of year leaving high 3° too cool

Newark reached 106 in 2010?  I thought they reached 108 in 2011?

Link to comment
Share on other sites

8 hours ago, LibertyBell said:

Newark reached 106 in 2010?  I thought they reached 108 in 2011?

That was the famous sensor calibration error when the temperature at Newark stopped recording. While the temperature was missing at Newark, Harrison reached 106°. But they went with the last reading at 12:38 at Newark of 103° before the outage.  Central Park made it to 103° just after 3pm with all the foliage blocking the sensor. So the actual high at Newark was probably around 106°.

Data for July 6 - HARRISON, NJ
Click column heading to sort ascending, click again to sort descending.
Date
Max Temperature 
Min Temperature 
Precipitation 
Snowfall 
Snow Depth 
2010-07-06 106 80 0.00 0.0 0
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
509 PM EDT TUE JUL 6 2010

...HIGH TEMPERATURE RECORDS FOR JULY 6TH BROKEN OR TIED AT ALL SIX 
WFO NEW YORK NY CLIMATE SITES.

               .....TEMPERATURE.....TIME (LDT).....PREVIOUS RECORD       
CENTRAL PARK NY........103............311 PM...........101 1999...
LA GUARDIA NY..........103............342 PM...........101 1999...
JFK ARPT NY............101...........1240 PM............99 1999...
ISLIP NY...............101............255 PM............99 1999...
BRIDGEPORT CT...........98...........1252 PM............98 1999...
NEWARK NJ..............103*..........1234 PM...........102 1999...

*NOTE: SENSOR CALIBRATION ERROR OCCURRED AT NEWARK NJ. OFFICIAL
       TEMPERATURE OF 103 WAS MEASURED BY FAA CONTRACT OBSERVER.
Link to comment
Share on other sites

It's Coming.       No Rain + Heat Stroke.     All models have a 90+ and all have just 0.10" on the next 10 days, not enough for 1 day even.

The next 8 days are averaging 72degs.(61/82), or +9.0.       These 'next 8 days' average went from 57 a week ago, to today's 72.

Month to date  is 58.4[-2.6].         Should be 63.4[+1.6] by the 23rd.

BDCF only salvation.

57*(48%RH) here at 6am, m. clear.        61* by 9am.     62* by Noon----There is that sea breeze again...........76* in the City now----I am being cheated.     63* at 1pm.........78* in the City now.        65* by 3pm.       67* by 4pm.       70* at 4:30pm.       71* at 5pm.       65* by 10pm.

Link to comment
Share on other sites

Morning thoughts...

Today will be partly to mostly sunny and warm. Temperatures will likely reach the middle 70s in most of the region. Likely high temperatures around the region include:

New York City (Central Park): 77°

Newark: 79°

Philadelphia: 77°

Tomorrow will be variably cloudy and still warm. As the PNA plunges to abnormally low levels for May, an impressive warmup could develop next week.

Link to comment
Share on other sites

5 hours ago, CIK62 said:

It's Coming.       No Rain + Heat Stroke.     All models have a 90+ and all have just 0.10" on the next 10 days, not enough for 1 day even.

The next 8 days are averaging 72degs.(61/82), or +9.0.       These 'next 8 days' average went from 57 a week ago, to today's 72.

Month to date  is 58.4[-2.6].         Should be 63.4[+1.6] by the 23rd.

BDCF only salvation.

57*(48%RH) here at 6am, m. clear.        61* by 9am.

Overnight, one saw about as big a swing in the guidance as one ever sees. The guidance has finally come into line with the strong PNA- that is now developing.

  • Like 1
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...