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October 2019 General Discussions & Observations Thread


Rtd208
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43 minutes ago, Juliancolton said:

I always forget that ToT is a real thing folks do. Been at least 20 years since I've had anyone come around.

It flourishes still in NYC, hordes of kids shepherding adults in silly costumes.

Fortunately nobody has to walk far from one apartment block to the next.

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47 minutes ago, etudiant said:

It flourishes still in NYC, hordes of kids shepherding adults in silly costumes.

Fortunately nobody has to walk far from one apartment block to the next.

same here in the burbs.    Hundreds of kids here.    There was some talk of moving it to the last Sat or Sun of Oct-too many people rushing home from work during the week, driving fast etc but it never got off the ground.   

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Pretty cool ride into the city seeing the tallest towers in Long Island city in the clouds. Ceiling is super low at somewhere around 700’. This is something you used to just see in Manhattan.

The pattern of extremes continues. Amazing how fast we flipped that mini drought. I have a feeling this corresponds to this winter with feast  or famine periods. Lots of winter is over calls or it’s never going to snow expected.-

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52 minutes ago, LongBeachSurfFreak said:

Pretty cool ride into the city seeing the tallest towers in Long Island city in the clouds. Ceiling is super low at somewhere around 700’. This is something you used to just see in Manhattan.

The pattern of extremes continues. Amazing how fast we flipped that mini drought. I have a feeling this corresponds to this winter with feast  or famine periods. Lots of winter is over calls or it’s never going to snow expected.-

Whats causing ceiling to be so low?  The east wind?

It's partly sunny down here (literally down in this case lol.)

There was a plane crash in our area.....

This reminds me of early summer and we're waiting for the sun to "burn" through lol.  It almost is.

 

 

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27 minutes ago, LibertyBell said:

Whats causing ceiling to be so low?  The east wind?

It's partly sunny down here (literally down in this case lol.)

There was a plane crash in our area.....

This reminds me of early summer and we're waiting for the sun to "burn" through lol.  It almost is.

 

 

Yeah destroyed a house. Nobody home but whoever was on the Cessna couldn't have survived 

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2 minutes ago, LongBeachSurfFreak said:

Yeah I would think 35-45mph. Which is plenty strong to knock down a ton of leaves. Mix that with heavy rain and it’s a street flooding situation

good thing the squall line comes through after Halloween evening....that would not be fun to be hit by that!

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6 hours ago, LibertyBell said:

I saw that the area is seeing a string of record low maximums- some have highs in the single digits?  Thats crazy for late October, even out there!

 

I think the all time record low temp for the lower 48 in October was set at Peter Sinks, Utah yesterday (-35!!!), breaking the record from 1917. It might get broken again tomorrow morning too.

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Generally warmer than normal conditions will persist through the end of the month.

A strong cold front will likely move across the region late Thursday night or Friday, possibly with a strong squall line. Ahead of and following the frontal passage, conditions warranting a wind advisory will be likely.

This initial push of cooler air will likely yield to milder conditions after a few days. An even stronger push of cold air could occur during the second week of November.

After mid-month, a prolonged period of above and occasionally much above normal temperatures could develop. Uncertainty about the second half of November has increased in recent days. Nevertheless, the base case remains a warmer than normal November.

Meanwhile, Utqiagvik (formerly Barrow) remains on track for its second warmest October on record (estimated mean temperature near 28.3° vs. the normal mean of 17.2°) and the warmest September-October period on record with an estimated mean temperature near 34.5° (existing record: 32.3°, 2016). On account of Arctic amplification, a warmer than normal November is very likely. Sensitivity analysis suggests a greater than 80% likelihood of a warmer than normal November.

The ENSO Region 1+2 anomaly was -1.3°C and the Region 3.4 anomaly was +0.6°C for the week centered around October 23. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.82°C and the ENSO Region 3.4 anomaly has averaged +0.43°C. A neutral ENSO is currently the base case for Winter 2019-20.

Since 1981, approximately one out of every seven December cases involved a neutral ENSO. In general, a neutral ENSO in which Region 1+2 had a cold anomaly and Region 3.4 had a warm anomaly (as has been the case in the 6 week moving average) saw a warmer than normal December. Such neutral ENSO cases accounted for about 27% of all neutral ENSO December cases during the 1981-2018 period. This data does not consider blocking, as it is too soon to be confident about that factor in December. However, the greatest warmth coincided with a negative PDO while the coldest outcome coincided with a strongly positive PDO (+1.00 or above for December). Therefore, the first part of winter could start off milder than normal in the Middle Atlantic and southern New England regions.

The SOI was -11.09 today.

Today, the preliminary Arctic Oscillation (AO) figure was -1.864.

Since 1950, there have been five prior cases when the AO averaged -0.500 or below in both July and August: 1950, 1958, 1960, 1968, and 2015. The average temperature for September through November in New York City was 58.9° (59.6° adjusted). All cases featured a warmer than normal fall. There remains a potential for autumn 2019 to rank among the 30 warmest cases on record. For New York City, that would translate into a September-November mean temperature of at least 58.8°.

On October 28, the MJO was in Phase 4 at an amplitude of 0.822 (RMM). The October 27-adjusted amplitude was 0.900.

In the two prior cases when the MJO moved into Phase 1 in late September or early October and then remained in Phase 1 for 12 or more consecutive days as occurred this year, the average decline in the 14-day average temperature for the 2-3 weeks that followed the MJO's moving out of Phase 1 was gradual. The current long-duration Phase 1 episode suggests that the second half of October could be warmer than normal. For New York City, an October mean temperature of 58.5°-59.5° (1.6° to 2.6° above normal) would be implied by those earlier long-duration Phase 1 cases. Based on the sensitivity analysis, the estimated October mean temperature is currently near 59.9°.

Since 1974, there were 3 cases that saw the MJO in Phase 2 at an amplitude of 1.500 or above for at least 3 days during the October 15-25 period, as occurred this year: 1990, 2011, and 2015. All three cases featured a warmer than normal November in New York City and readings that were 3° or more above normal during the second half of November.

Based on sensitivity analysis applied to the latest guidance, the implied probability of New York City having a warmer than normal October is currently near 100%.

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