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August 2019 General Discussions & Observations Thread


bluewave
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44 minutes ago, Cfa said:

Very close CTG strikes all around me, looking like flash grenades. My cue to go indoors.

Best storm of the year for me, though the bar for that title was on the ground. The microburst would’ve been #1 but I missed it.

Yea this was a nice surprise. Storm blew up as it came onshore. Didn’t see that coming

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Parts of the Middle Atlantic and southern New England areas experienced record warmth today. Highlights included: Baltimore: 99° (old record: 97°, 1914); Boston: 95° (old record: 92°, 1906, 1966, and 1983); Norfolk: 96° (tied record set in 1912 and tied in 1954); Richmond: 99° (old record: 98°, 1914 and 2002); Sterling, VA: 95° (tied record set in 2002); and, Washington, DC: 98° (tied record set in 2002).

Anchorage, which came off its warmest month on record, remains on track to record its warmest summer on record. At present, based on the sensitivity analysis, Anchorage will finish summer 2019 with a mean temperature near 62.0°. The summer record is 60.8°, which was set in 2016. There is also a chance that 2019 could set a new August record for highest mean temperature on record. If so, that would be the third consecutive monthly record set this year.

The ENSO Region 1+2 anomaly was -0.7°C and the Region 3.4 anomaly was +0.1°C for the week centered around August 14. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.42°C and the ENSO Region 3.4 anomaly has averaged +0.33°C. Neutral-warm ENSO conditions are in place in Region 3.4 with neutral-cool conditions in place in Region 1+2. There is considerable uncertainty about the ENSO evolution later this summer into the fall. Some of the guidance continues to show the development of neutral-cool ENSO conditions.

The SOI was +10.86 today.

Today, the preliminary Arctic Oscillation (AO) figure was --1.006. A general tendency for blocking could persist into the last week of August. By that time, the AO could move toward neutral to positive values. This evolution of blocking will promote a generally warm or perhaps very warm remainder of summer.

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 (the preliminary June 2019 average was -0.665): 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.

In addition, since 1950, there have been four prior cases when the AO averaged -0.500 or below in both June and July: 1957, 1958, 1993, and 2009. In three (75%) of those cases, August wound up warmer than normal. August 1993 was the warmest case. The mean anomaly from those cases suggests that the Middle Atlantic and southern New England areas could be approximately 0.5° to 1.5° above normal overall during August.

On August 18, the MJO was in Phase 1 at an amplitude of 1.128 (RMM). The August 17-adjusted amplitude was 0.751.

Finally, based on sensitivity analysis applied to the latest guidance, New York City has an implied 61% probability of having a warmer than normal August. In terms of receiving 50" or more precipitation, New York City's implied probabilities are 65% (1869-2018 historical period) and 77% (1971-2018 period).

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From the looks of the pattern and my model reading the heat is not done... after Thursday we’ll have some nice days but at least the potential is there for more heat at the end of August and beginning of September but this heat will not be accompanied by high humidity, it looks to be the dry heat effect instead which would be good news. Have a good night folks

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1 hour ago, bluewave said:

No big heat or humidity for a while after this week. The WAR and Bermuda high gets replaced by the high over SE Canada. So we get into a NE to E flow from the Canadian Maritimes. 

 

E49DD8FD-D114-41B1-A35B-FCF83ADBA8B1.thumb.png.4c35de084ab2ee390f9f1bda50287c03.png

There is heat coming again it won’t be as intense and as humid but look out late August early September some 90’s are possible

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1 hour ago, NYCweatherNOW said:

There is heat coming again it won’t be as intense and as humid but look out late August early September some 90’s are possible

Doesn’t look like anything too impressive at this time as the high will still be east of New England near the end of the month. Maybe a few warmer days before the next cold front and high moves in first week of September. But September is usually good for a few more 90 degree days. 

 

96BE3DE3-1FD3-43F8-AF7F-C4B7CD069E31.thumb.png.769542c29647e5325fa326c2c8571d7b.png

 

 

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49 minutes ago, bluewave said:

Doesn’t look like anything too impressive at this time as the high will still be east of New England near the end of the month. Maybe a few warmer days before the next cold front and high moves in first week of September. But September is usually good for a few more 90 degree days. 

 

96BE3DE3-1FD3-43F8-AF7F-C4B7CD069E31.thumb.png.769542c29647e5325fa326c2c8571d7b.png

 

 

The euro weeklies were crazy warm for September-will have to see if they were over-done....

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Pending on clouds on Thu 58/22) 850's again approach 19-22c so another chance for mid 90s with sunshine. We'll see if the warmer spots can grab 90 today even with the NE flow.

11AM Roundup

PHL: 86
ACY: 86
TEB: 85
New Bnswk: 85  
ISP: 84
JFK: 84
EWR: 84
NYC: 82
TTN: 82
LGA: 81
BLM: 81

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2 hours ago, NYCweatherNOW said:

There is heat coming again it won’t be as intense and as humid but look out late August early September some 90’s are possible

Far out there but do see some transient ridging possible with some warmer/heat transport on/around  Fri-Sun (labor day weekend)

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43 minutes ago, Brian5671 said:

The euro weeklies were crazy warm for September-will have to see if they were over-done....

It looks we’ll probably finish August with under 10 days reaching 90 degrees. The Septembers that followed this pattern since 2010 usually featured 0 to 3 days reaching 90 degrees at Newark. Missing count column has the number of September 90 degree days.

Time Series Summary for NEWARK LIBERTY INTL AP, NJ - Month of Aug
Click column heading to sort ascending, click again to sort descending.
Year
Number of Days Max Temperature >= 90 
Missing Count
2019 3  
2018 14 4
2017 2 3
2016 13 5
2015 13 5
2014 2 3
2013 3 1
2012 7 2
2011 4 0
2010 11 6

 

 

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56 minutes ago, Gravity Wave said:

You could've made an accurate long distance forecast for the past year by looking at the Euro Weeklies and predicting the exact opposite.

I agree-they were horrid last winter.   I certainly look at them based on past successes, but it's only one of many tools....

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52 minutes ago, Isotherm said:

For what it's worth - The Old Farmer's Almanac appears to be forecasting another non-winter in the Northeast for the second consecutive year.

image.thumb.png.8ea6b9b36f54ec2624f9d4b1bbf40645.png

looks like a fast PAC jet based on that map.  If that happens and we get no Atlantic blocking, it's a redux of last year essentially.

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3 hours ago, Brian5671 said:

looks like a fast PAC jet based on that map.  If that happens and we get no Atlantic blocking, it's a redux of last year essentially.

If the previous Fast PAC Jet recurs, I hope the North East, Mid Atlantic zones and the continental shelf waters are on the pill. as always ....

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