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Thanks! Kinda figured with the images I've been seeing.
Enjoy this week. All of Eastern U.S and Canada should enjoy the Summer this week, this weekend and next week it changes especially more for Eastern Canada.
Sunday the Polar Vortex is there and it just rotates around. Greenland looks like it might finally warm up.
The 14-day forecast for here shows these highs in Celsius. Also seems like we'll be getting a bit of a break from the rain.
28
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23
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23
This is normally the hottest time of the year here, and the average high is about 28C, so we should be getting at least several days that are easily above 30C. This is usually when get our 35s, 37s, 38s as well. None of that is in the forecast.
I arrived back in Rochester to sunny skies with a temp of 76 and a dew of 66. The max was 83 after a min of 66. 0.71" of rain fell this morning bringing the monthly total to over 3", well above average. Yet again gonna be a wetter than normal month
This July seems extremely boring so far here. Every single high has been between 74 and 86. Zero heat, little variety, no interesting cool spells. The Canadian Rockies had better and more interesting weather.
I get your points; but that's an anomaly plot, on top of the mean ridge position. That could just mean the ridge / trough pattern is weaker than usual. Here's the Jan-Feb mean
I've never argued by just a current weather pattern. Obviously there are plenty of other influences doesn't change that the Rockies change the climate or mean ridge position.
not too much distance. Rossby waves work on a scale of 2000-3000 miles. Figure 6.7 shows the length of influence of the mountains on the planetary wave pattern:
Don't have time to go back & forth on this. Just remember 2 things The Top Down approach. AND we are talking about 250-400mb in the atmosphere! That's about 25-35k ft range. This is the upper level jet. We aren't talking about low or mid level Jet.
The Rockies have little impact of a pattern as the jet stream winds are well above the mountain peaks. Buckling the flow at the jet stream can be caused by any numerous energy pockets in the atmosphere....say a typhoon in the west pacific....or blocking over the arctic. But these high altitude blocking patterns in what we call the jet stream is not influenced by the rockies. In other words..LOOK ELSEWHERE for why a pattern is happening.
For surface and mid level, Yes, I agree they have some affect but the notion that its causing a ridge is very inaccurate and that's why when I show my maps I mention it. The maps I mostly post is the Jet at 300mb.
The Rockies protects areas west of it from getting as cold as often as the plains....but the Rockies themselves doesnt affect the high level jet stream patterns.
Gotta let go of the Rockies thing. I would also love for you to start getting into playing the Jet stream loops to see how patterns evolve. This would help you veer away from using a mountain chain as a reason for a mean or pattern.
Quote:
Originally Posted by nei
neat image of a year's temperatures, get to see the averages and the variation:
I love it!! Do the peaks indicate the anomaly? So like May was more above normal than April? No below normal months? How would a below normal month look with that chart? And is that per day? Trying to figure out the width of the shaded areas. Why is it peaking in the middle of the hills?
Quote:
Originally Posted by nei
hmm... it's not labelled well at all. I thought it was number of days at a given temperature. So peak would be the most frequent temperature of the month.
Apparently it grabbed the attention of others as well. Check out Gavin's tweet and the numerous replies to it which I will quote a few.
"I'd add the actual MERRA2 climatology to this graph to make it easier for the public to understand. As it is the x-axis is a bit confusing."
"We've discussed this before. Using the absolute temp is not commensurate with the accuracy of the anomalies even tho I know ppl want it."
"True, but is the seasonal cycle in MERRA2 that much more accurate than their climatology? Anoms with season cycle seems like an odd hybrid"
"Yes. The seasonal anomalies w.r.t. the annual cycle are well captured for the same reason the interannual ones are - I'll make a graph..."
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