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June 2019 General Discussions & Observations Thread


Rtd208
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Daily and, in cases, monthly record heat stretched from the Middle East to Europe today. On account of several remarkable outbreaks of heat, the global temperature anomaly of +0.98°C for 2019 ranks 3rd highest on record for the January-May period. Nine of the ten and 17 of the 20 warmest January-May periods occurred 2000 and afterward. All occurred 1990 or later.

Nevertheless, the northern Middle Atlantic and southern New England areas have yet to experience excessive heat. However, that region could see its warmest readings so far this summer during the next several days.

The ENSO Region 1+2 anomaly was +0.3°C and the Region 3.4 anomaly was +0.5°C for the week centered around June 19. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.02°C and the ENSO Region 3.4 anomaly has averaged +0.77°C. Neutral-warm ENSO conditions could develop later this month and then continue into at least the first half of July.

The SOI was -3.87 today.

Today, the preliminary Arctic Oscillation (AO) figure was -1.569.

Blocking is consistent with warmth on the East Coast during the middle and latter part of summer. Hence, should blocking generally persist, the prospects of a warm or perhaps very warm second half of summer could increase.

With respect to the current month, there were 13 cases where the AO averaged -0.75 or below during the first half of June. The mean temperature for the second half of June usually fell within 1° of normal in the northern Middle Atlantic region (73.6° is normal in New York City). According to the latest guidance, the June 16-30 temperature could finish near 74.6°. During the closing week of June, parts of the Northeast could see their warmest temperatures so far this summer.

In addition, since 1950, there was only a single year that saw the AO average -1.000 or below in May and -0.500 or below in June (as appears likely in 2019): 1993. 1993 featured much above normal readings in the East during the late summer (August 15-September 15 period) and predominantly cooler than normal readings across the western third of the nation during much of the summer.

On June 24, the MJO was in Phase 7 at an amplitude of 0.696 (RMM). The June 23-adjusted amplitude was 0.708.

Since 1974 when MJO data was reported, years in which the MJO was in Phase 5 at an amplitude of 1.500 or above for at least two days, as was the case this year, were typically warmer than normal and drier than normal during the first 10 days of July. 1975 and 1985 were somewhat cooler than normal and very wet during the July 1-10 period. Some of the extended guidance is continuing to suggest a warmer and drier outcome with the warmest anomalies likely during the second half of that period.

Since 1994, there have been 6 cases where the SOI fell to -35.00 or below during the June 16-30 period as occurred on June 21-22. Following such SOI outcomes, the July 1-15 temperature averaged approximately 3.5° above the June 16-30 figure in New York City. Based on the modeled June 16-30 outcome, that would imply that the first half of July would be among the top third warmest first halves of the month on record. In addition, 4/6 (67%) of those cases were followed by an El Niño winter (one was followed by a La Niña winter and one was followed by a neutral ENSO winter).

The implied probability of a warmer than normal June in and around New York City has increased to 57%. In addition, the probability that New York City will receive 50" or more precipitation is currently 72%.

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Last 5 days of June are averaging 80degs., or 6degs. AN.

Month to date is  -0.7[70.1].      June should end near  +0.4[71.7].

74.3* here at 6am.  75.7* at 7am.   78.9* at 10am(slower rise than I expected) 80.2* at 11am.

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While there is only about 5 degrees F to play with in July between the mean and the all time record of 81.4*, the first halve of July looks to be +2.5 to +4.0, if clouds and rain do not interfere, while no BDCF's kick in.

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26 minutes ago, CIK62 said:

While there is only about 5 degrees F to play with in July between the mean and the all time record of 81.4*, the first halve of July looks to be +2.5 to +4.0, if clouds and rain do not interfere, while no BDCF's kick in.

+4 would be a massive inferno for July, like 2013 (first 3 weeks)

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Pretty impressive for NYC to have 10 months with over 5.00” of precipitation since February 2018.

 

2018 2.18 5.83 5.17 5.78 3.53 3.11 7.45 8.59 6.19 3.59 7.62 6.51 65.55
2019 3.58 3.14 3.87 4.55 6.82 5.32 M M M M M M 27.28
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29 minutes ago, bluewave said:

Pretty impressive for NYC to have 10 months with over 5.00” of precipitation since February 2018.

 

2018 2.18 5.83 5.17 5.78 3.53 3.11 7.45 8.59 6.19 3.59 7.62 6.51 65.55
2019 3.58 3.14 3.87 4.55 6.82 5.32 M M M M M M 27.28

11 such days here also....Precipitation amounts of 69.50" in 2018 and 31.87" so far this year.

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18 minutes ago, doncat said:

11 such days here also....Precipitation amounts of 69.50" in 2018 and 31.87" so far this year.

2018 set the record for the most days with measurable rainfall in NYC. 2019 is currently in 3rd place for Jan-Jun.

Time Series Summary for NY CITY CENTRAL PARK, NY - Jan through Dec
Click column heading to sort ascending, click again to sort descending.
Rank
Year
Number of Days Precipitation >= .01 
Missing Count
1 2018 158 0
2 1996 152 0
3 1972 145 0
4 2003 142 0
5 2008 141 0
- 1950 141 0

 

Time Series Summary for NY CITY CENTRAL PARK, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Ending Date
Number of Days Precipitation >= .01 Jan 1 to Jun 30
Missing Count
1 1950-06-30 84 0
2 1972-06-30 81 0
3 2019-06-30 79 5

 

 

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3 minutes ago, LongBeachSurfFreak said:

Agreed. Soil moisture is way too high upstream. You need hot/dry air masses to advect from the SW.  

Soil moisture doesn't seem to be holding us back today. Forecast was 84, and its currently 88

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