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February 2019 General Discussion and Observation Thread


Stormlover74

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1 hour ago, LongBeachSurfFreak said:

Watching Dc get snow again today is pretty ruff. Luckily we at least had that squall. 

It’s not a common occurrence for DC to get to double digit seasonal snowfall by January 31st ahead of NYC. I could only find 4 other years since 1950.

Seasonal snowfall by January 31st

2019....DCA......12.9......NYC.....7.5

2000..................14.5..................9.5

1990..................12.7...................7.9

1963..................18.3.........,.........9.8

1957...................10.3..................9.8

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23 minutes ago, bluewave said:

It’s not a common occurrence for DC to get to double digit seasonal snowfall by January 31st ahead of NYC. I could only find 4 other years since 1950.

Seasonal snowfall by January 31st

2019....DCA......12.9......NYC.....7.5

2000..................14.5..................9.5

1990..................12.7...................7.9

1963..................18.3.........,.........9.8

1957...................10.3..................9.8

How many of those years also had Boston at 2”? :lmao: 

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26 minutes ago, LongBeachSurfFreak said:

The NY harbor buoy (13 miles offshore) water temp is down to 38. This will help coastal locations with mixing issues when the cold air comes back. So this cold blast wasn’t a total waste.

won't matter when there's a cutter to Detroit and it's 55 here...:lol:

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At least NYC was able to go above 2012 for days with a high below 32. Today was number 6 on the season so far. 

NYC days with a high below 32 during the 2010’s

25......2014

21......2015

19......2018....2011

15......2010

10......2016

9........2017....2013

6........2019.....so far

4........2012

 

 

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2 minutes ago, Snow88 said:

Pattern gets better by the 10th on the gefs. We need the epo to work out because the pna looks terrible.

As the days go by the frustration mounts. We just can't catch a break this winter. When one connector improves, another one goes to crap. All I ask for is just one MECS event then call it a winter.

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4 minutes ago, NutleyBlizzard said:

As the days go by the frustration mounts. We just can't catch a break this winter. When one connector improves, another one goes to crap. All I ask for is just one MECS event then call it a winter.

People 90 minutes west of us are out of school snow days already. It's snowed everywhere but Philly to Boston. 

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7 minutes ago, NutleyBlizzard said:

As the days go by the frustration mounts. We just can't catch a break this winter. When one connector improves, another one goes to crap. All I ask for is just one MECS event then call it a winter.

Someone here tell me what all the phases need to be in, so I can go do something else with my time if they are unfavorable...

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A weak system brought accumulating snow to parts of the Middle

Atlantic region today. Snowfall amounts included: Atlantic City: 0.3"; Baltimore: 0.8"; Philadelphia: 0.3"; Washington, DC: 0.8"; and, Wilmington, DE: 0.8".

The SOI was +6.96 today. Should the MJO move into Phase 7 and remain there for a time at a high amplitude, the SOI should go negative. At a low amplitude, the historical tendency has been almost evenly split.

The Arctic Oscillation (AO) was -3.537. That was the lowest figure since November 26, 2018 when the AO was -3.629. The preliminary average for meteorological winter is -0.315.

On January 30, the MJO moved into Phase 7 at an amplitude of 1.720 (RMM). That amplitude had increased from the January 29-adjusted figure of 1.457.

In coming days, there is significant uncertainty about the MJO's progression. Such uncertainty is greater than usual, even as ensemble forecasts of the MJO typically have low skill beyond 120 hours.

Some of the guidance takes it into Phase 8. Other guidance takes it toward or into a low amplitude, even temporarily back to Phase 6. The Canadian ensembles take it all the way back to Phase 5. Such an outcome would likely result in a generally warm February in the East. However, the Canadian ensembles are an outlier.

Given both historic data and the other guidance, the Canadian ensembles should be discounted. Nevertheless, the risks of a turn toward Phase 6 or a drop to low amplitude prior to any move to Phase 8 is somewhat more likely than a straight progression at high amplitude into Phase 8.

Phase 7 at low amplitude favors a positive AO. As a result, the AO will likely rise from today's seasonal low to date. There remains some possibility of a short period where the AO reaches slightly positive values.

As a result, temperatures a pronounced warmup from the recent cold is on tap. However, that warmup still appears to be temporary. Colder air should follow by the end of that week.

There remains a possibility that a predominantly colder than normal regime could then lock in for at least a 2-3 week period, especially as the EPO is expected to go negative and blocking could redevelop.

In sum, the base case remains the idea of a short-term warmup, with colder air returning by the end of next week. Afterward, the redevelopment or restrengthening of blocking could lead to a multi-week period of readings that would generally wind up below normal in the eastern third of the U.S.

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Just now, weatherpruf said:

Someone here tell me what all the phases need to be in, so I can go do something else with my time if they are unfavorable...

someone hasn't been paying attention in class - that's all the professors here have been discussing all semester:grad:

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3 minutes ago, donsutherland1 said:

A weak system brought accumulating snow to parts of the Middle

Atlantic region today. Snowfall amounts included: Atlantic City: 0.3"; Baltimore: 0.8"; Philadelphia: 0.3"; Washington, DC: 0.8"; and, Wilmington, DE: 0.8".

The SOI was +6.96 today. Should the MJO move into Phase 7 and remain there for a time at a high amplitude, the SOI should go negative. At a low amplitude, the historical tendency has been almost evenly split.

The Arctic Oscillation (AO) was -3.537. That was the lowest figure since November 26, 2018 when the AO was -3.629. The preliminary average for meteorological winter is -0.315.

On January 30, the MJO moved into Phase 7 at an amplitude of 1.720 (RMM). That amplitude had increased from the January 29-adjusted figure of 1.457.

In coming days, there is significant uncertainty about the MJO's progression. Such uncertainty is greater than usual, even as ensemble forecasts of the MJO typically have low skill beyond 120 hours.

Some of the guidance takes it into Phase 8. Other guidance takes it toward or into a low amplitude, even temporarily back to Phase 6. The Canadian ensembles take it all the way back to Phase 5. Such an outcome would likely result in a generally warm February in the East. However, the Canadian ensembles are an outlier.

Given both historic data and the other guidance, the Canadian ensembles should be discounted. Nevertheless, the risks of a turn toward Phase 6 or a drop to low amplitude prior to any move to Phase 8 is somewhat more likely than a straight progression at high amplitude into Phase 8.

Phase 7 at low amplitude favors a positive AO. As a result, the AO will likely rise from today's seasonal low to date. There remains some possibility of a short period where the AO reaches slightly positive values.

As a result, temperatures a pronounced warmup from the recent cold is on tap. However, that warmup still appears to be temporary. Colder air should follow by the end of that week.

There remains a possibility that a predominantly colder than normal regime could then lock in for at least a 2-3 week period, especially as the EPO is expected to go negative and blocking could redevelop.

In sum, the base case remains the idea of a short-term warmup, with colder air returning by the end of next week. Afterward, the redevelopment or restrengthening of blocking could lead to a multi-week period of readings that would generally wind up below normal in the eastern third of the U.S.

and no mention anymore of snowstorms...…….

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Next week looks interesting. We’ll get some rain but it looks to cut so much and it looks like there won’t be Gulf of Mexico out of that so we’ll get some showers and probably get colder with plenty of chances for frozen precipitation after that. As of Thursday looks colder with mostly frozen precipitation according to the GfS para

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