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Moving Through December - Changing Patterns and Changing Diapers


ChrisM

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The argument that you can't get colder outbreaks because of the arctic doesn't make a lot of sense to me. Down here, there's a much better correlation to features like the Bering Sea Strait vortex or ridge and the affect it has with Canada and snowpack....which ultimately can cause an early end to winter.

that's not what he said, though.

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Right, I'm not saying it's false...but it's difficult to compare one year to a 30yr baseline that was pretty chilly up there on a decadal level.

It'll be interesting to look back in ten years to see how well anogs performed in terms of duration and establishment of cold in this period of time. Warmth has been so severe lately on this continent my thought is we hit a tipping point. It'll take us hitting another tipping point to trigger the swing back.

We are warming the soil at depths as some of the studies have shown in Alaska. My bet is the same is happening in the nearby waters. What effect that has time will tell.

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It'll be interesting to look back in ten years to see how well anogs performed in terms of duration and establishment of cold in this period of time. Warmth has been so severe lately on this continent my thought is we hit a tipping point. It'll take us hitting another tipping point to trigger the swing back.

We are warming the soil at depths as some of the studies have shown in Alaska. My bet is the same is happening in the nearby waters. What effect that has time will tell.

This country has taken the world torch award though. None of us can help it, if the AK vortex has remained there.

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He's saying that about the duration and strength of outbreaks not that they cannot occur

Poor wording on my part, but the point remains.

If people are busting on temp forecasts, it is because of the persistent low anomalies to our north and the -PDO like pattern and Nina style pattern. Dec correlations to -PNA and -PDO probably are not far off from what we are seeing.

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Poor wording on my part, but the point remains.

If people are busting on temp forecasts, it is because of the persistent low anomalies to our north and the -PDO like pattern and Nina style pattern. Dec correlations to -PNA and -PDO probably are not far off from what we are seeing.

If the cold air isn't as cold...it probably can't "ooze" as effectively into the plains and the northeast than in previous decades when the arctic was colder...given the same synoptic pattern, of course.

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Also, the northern plains have been very cold in the 2000s and have gotten blasted with cold. I don't see how the last two years defines a trend.

The last graph posted did not address the 2010-2011, just the overall decadal warming. I agree you can't make assumptions on the arctic from just the last two years, but as a whole, it is warmer, and I think it matters to forecasting on some level.

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This country has taken the world torch award though. None of us can help it, if the AK vortex has remained there.

Sarah Palin continues to screw the country.

We are definitely the hemispheric anomaly. I think there are some expecting old school prolonged outbreaks the early part of this winter post change. I think we just see periods of oscillating temps with storm threats which side we fall on who knows. Hopefully it's a gradual step down into real winter as we head into January.

I think the point on overall analogs though is semi-valid. The track record of even 2-4 week lead times the past 2 early winters has shown some decreasing skill in predicting the weather.

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someone had to take Analog96's place.

haha your response cracked me up

If you claim you've read and understood the information everyone has presented that shows the clear differences between last winter and this winter but insist on continuing with the weenie-like posts, then that person should heed my advice.

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The last graph posted did not address the 2010-2011, just the overall decadal warming. I agree you can't make assumptions on the arctic from just the last two years, but as a whole, it is warmer, and I think it matters to forecasting on some level.

There is some speculation that the AO is affected by the lack of ice, which would be most prevalent in the summer and perhaps spill into late Autumn. Obviously, any icemelt rapidly builds up after October. You could almost argue that warming up there can help cause a cold push further south with ridging in the polar regions. Obviously, a lot of all this talk is speculation. There is no doubt it has been warm there, but we are also in the -AO/NAO decadal cycle which will naturally torch that region. How much is man helping? I really don't know..probably somewhat.

On a side note, this country was very warm in the 30s and 40s. The dust bowl wasn't just a product of poor farming ways. -PDO and +AMO act to dry up the south. Expect more droughts down there. Luckily, the AMO is declining.

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The new pattern will dislodge the Arctic Air mid-month into southern Canada / northern US and setup a classic La Niña pattern with New England threats. I'm not buying the west-based blocking solutions showing up on the GEFS that keep coming and going.

Is this going to be Winter 2011-2012 all over again?

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There is some speculation that the AO is affected by the lack of ice, which would be most prevalent in the summer and perhaps spill into late Autumn. Obviously, any icemelt rapidly builds up after October. You could almost argue that warming up there can help cause a cold push further south with ridging in the polar regions. Obviously, a lot of all this talk is speculation. There is no doubt it has been warm there, but we are also in the -AO/NAO decadal cycle which will naturally torch that region. How much is man helping? I really don't know..probably somewhat.

On a side note, this country was very warm in the 30s and 40s. The dust bowl wasn't just a product of poor farming ways. -PDO and +AMO act to dry up the south. Expect more droughts down there. Luckily, the AMO is declining.

Great points.

All I was saying is to assume a result based on an analog that came from a very different overall climate period.... we'll have to see how valid that is as time goes forward.

What we haven't figured out yet is the tipping point to these events like the 30s droughts etc. I'm not sure I believe it's all chaos, at some point something changes enough to trigger a change that cascades.

This is clearly not last winter but that doesn't mean it cannot suck in different ways for a lot of people on the east coast. Time will tell I think the tipping point for this winter comes around 12/15 to 12/20.

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If you claim you've read and understood the information everyone has presented that shows the clear differences between last winter and this winter but insist on continuing with the weenie-like posts, then that person should heed my advice.

But there is a ripping Pacific jet?

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If you claim you've read and understood the information everyone has presented that shows the clear differences between last winter and this winter but insist on continuing with the weenie-like posts, then that person should heed my advice.

But there is a ripping Pacific jet?

And an east based NAO? I think you're just wishcasting.

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If you claim you've read and understood the information everyone has presented that shows the clear differences between last winter and this winter but insist on continuing with the weenie-like posts, then that person should heed my advice.

HM you will injoy the new web sight it has alot of good info about the stratosphere.
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