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Heat Wave - June 20-23


CoastalWx

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I completely agree on relative to averages. I've never questioned that.

I think I'm too close to those crests (down and then back up) for any downsloping. That doesn't kick in until you're heading into G'field. As far as cooling goes, I don't radiate for sh*t. I'm always one of the warmest overnight spots not only in the region, but I think for a lot of SNE. lol

Anyway--let's get back to more general discussion rather than the idiosyncracies of the Pit. But, visitors are welcome. I still invite Chris to take away some wood. :)

The heat rolls down the Mohawk Trail right into downtown Greenfield and Deerfield but it's not neaerly as bad as the wider valley from Northampton to Springfield which will absolutely bake this week.

Although I'm only a few miles from G'field ctr the summer temp differential can often be as much as 5 degrees due to elevation gain and dense forest.

I'll come get some wood but I can't fit much in the Subaru. lol

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Some good battles today. Bravo.

Haha its a refreshing argument we haven't had in a couple weeks...but we'll do it again during the next heat wave when Pete claims a 20F lapse rate ;)

It's apples and oranges like you said...I think of it like comparing snowfall totals measured once every 24 hours at 12z (say CoOps) vs. ones measured every 6 hours all winter long.

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Some good battles today. Bravo.

All I'll add is that although the home stations may be close to accurately measuring everyones forested microclimates they may not be properly sited to make comparisons to the airport stations. It's like comparing apples to oranges if someone in the jungle in C MA at 700ft claims their max summer temps are colder on average than ORH.

I think that's the key. You're measuring your own microclimate so it is hard to compare at a moment in time to an airport station. You can, however, compare to other home stations, imo because the siting will be similar. Long term though, you should be able to compare averages and normals if you keep a long enough record so departures would be more clear.

That being said...looks like its going to be hot at many places Wednesday & Thursday!

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Yes. This.

I could put a dew point sensor right above the lawn that I just watered and on a summer day you'll get a nasty looking dew point. While the dew point may actually be 80 degrees at that location you can't compare it to an ASOS reading at an airport. It's a totally different comparison. Using your own readings to compare against previous events at your own station is fine but that's about the most you can do. At least the airports with where they're sited and the requirements for siting an ASOS allow us to make useful comparisons between them. There's no way I could compare Kevin's weenie thermometer to mine and to BDL's. Apples and oranges.

So where is yours situated? It had better not be within 50 feet of any grass or trees or the Thermonazi will get you
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I think that's the key. You're measuring your own microclimate so it is hard to compare at a moment in time to an airport station. You can, however, compare to other home stations, imo because the siting will be similar. Long term though, you should be able to compare averages and normals if you keep a long enough record so departures would be more clear.

That being said...looks like its going to be hot at many places Wednesday & Thursday!

And that's true, but imo it gives you more of the skin type conditions, rather than the true boundary layer conditions in the lower couple of hundred feet or so, among the local forested areas argument that we have been saying.

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So it can't be over grass, under trees, over pavement, or water. That leaves what, putting it over the kids' sandbox?

I thought the guidace used to be over natural vegetation and if you couldn't do that it had to be so many feet from the surface.

Mine is in a CRS or Stevenson screen surrounded by grass but i have a hill to my west shades me from about 3 or 4pm on so I never get as high as some other areas.

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So what about the winter when there is no vegetation? Why the difference then? Maybe in the winter I should place it on top of my snow bank out by the street

Might as well put it on top of the transmitter on Mt Baldy because it reads the temp at 1500' anyways.

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I would honestly love to sit down discuss/learn as much as possible about our east coast seabreeze stuff.

Well, the model wind depictions are hinting at it, that's all. I'm not making a crazy assumption or anything. Winds aloft look light and with such strong heating..it is possible. Might be very localized and weak, however.

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Some good battles today. Bravo.

All I'll add is that although the home stations may be close to accurately measuring everyones forested microclimates they may not be properly sited to make comparisons to the airport stations. It's like comparing apples to oranges if someone in the jungle in C MA at 700ft claims their max summer temps are colder on average than ORH.

I'll echo the others - nicely put. A local example: The COOP observations in Farmington run about 2F higher than mine, despite being the same elev and only 6 miles away. However, that setup is standard, over a maintained lawn about 30' from Rt 4 (two paved lanes) and 40-50' from the nearest trees. My thermometer is on the shady side of a house surrounded by trees. Thus the 2F discrepancy is due to transpirational cooling when the leaves are green. In winter I'm colder, in the mornings anyway, because of my flat-at-hill-bottom frost pocket, while the COOP is on slight sidehill. In any wider scale comparison of temps, I'd recommend giving lots more weight to the COOP numbers than to mine.

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I'll echo the others - nicely put. A local example: The COOP observations in Farmington run about 2F higher than mine, despite being the same elev and only 6 miles away. However, that setup is standard, over a maintained lawn about 30' from Rt 4 (two paved lanes) and 40-50' from the nearest trees. My thermometer is on the shady side of a house surrounded by trees. Thus the 2F discrepancy is due to transpirational cooling when the leaves are green. In winter I'm colder, in the mornings anyway, because of my flat-at-hill-bottom frost pocket, while the COOP is on slight sidehill. In any wider scale comparison of temps, I'd recommend giving lots more weight to the COOP numbers than to mine.

I agree...nice discussions today. They have been missed!

Speaking of coops, I wonder why more of them don't have real-time reporting sensors in their shelters?

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