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Death of DroughtStein Discussion


Bostonseminole
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3.66" in my Stratus rain gauge, 3.95" in my Davis VP2. I've noticed my Davis tends to over report rain during heavy events, but is very close to the Stratus for the lighter events. Is this normal?

Anyway, drought cancel here. Rivers and streams are flowing vigorously again. Not that there was much of a drought to begin with here...

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2 hours ago, OSUmetstud said:

Do you guys have any idea on snow climo on Hwy 201 in Maine. I'm assuming it's pretty decent, 100"+?

 

 

Probably 80-85 at Skowhegan - they usually get a bit less than my 90 - and Jackman runs 105-110.  The hills around there must do significantly better; our timber harvests at Holeb, 10 miles west from Jackman, and Sandy Bay, 20 miles north at the frontier, always have much deeper snow than in town.

Edit:  Saw 100k+ outages in Maine. Includes our place, so the gennie we put in last April gets its 1st workout.

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24 minutes ago, wxmanmitch said:

3.66" in my Stratus rain gauge, 3.95" in my Davis VP2. I've noticed my Davis tends to over report rain during heavy events, but is very close to the Stratus for the lighter events. Is this normal?

Anyway, drought cancel here. Rivers and streams are flowing vigorously again. Not that there was much of a drought to begin with here...

I feel like that's much more normal than the other way around... the electronic tippers seem more prone to being on the high side though Dryslot in the last post proved not always.

It makes sense though in big rain events if you consider it as a percentage of error, right?  In lighter events you may only notice a very slight difference, but as you magnify the rainfall the difference between the two will grow.  @dendrite is the expert on these things but if that's say an 8-9% error, in a lighter rain event that's only the difference of 0.50" vs. 0.54", which may not be as noticeable? 

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4 minutes ago, powderfreak said:

I feel like that's much more normal than the other way around... the electronic tippers seem more prone to being on the high side though Dryslot in the last post proved not always.

It makes sense though in big rain events if you consider it as a percentage of error, right?  In lighter events you may only notice a very slight difference, but as you magnify the rainfall the difference between the two will grow.  @dendrite is the expert on these things but if that's say an 8-9% error, in a lighter rain event that's only the difference of 0.50" vs. 0.54", which may not be as noticeable? 

To me, I notice the heavier events create a larger scale difference then the lt/mod ones, And i believe that was my statement earlier today that i found the two to be much closer, 1 to 2 cents off rather then a larger scale as with heavier precip rates, I've had to tweak the calibration on the tipper to find a happy medium, But my stratus always will take precedence on the totals in the end.

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I have an issue with windy rain events. My Davis had 0.28” while my other gauge had .40. The other day when it was calm, there was like .01” difference. I also think trees are an issue when it is windy. My Davis is apparently close enough to feel the effects. I’m in a windy spot so it is what it is. I’ll definitely get a stratus. 

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33 minutes ago, powderfreak said:

I feel like that's much more normal than the other way around... the electronic tippers seem more prone to being on the high side though Dryslot in the last post proved not always.

It makes sense though in big rain events if you consider it as a percentage of error, right?  In lighter events you may only notice a very slight difference, but as you magnify the rainfall the difference between the two will grow.  @dendrite is the expert on these things but if that's say an 8-9% error, in a lighter rain event that's only the difference of 0.50" vs. 0.54", which may not be as noticeable? 

The percentage of error is definitely more significant the heavier the rain gets, not necessarily the more rain that falls for the event in question. The worst errors seem to occur during thunderstorms. Prior to calibrating my Davis tipper, it was over reporting by an average of 25-30%. It's pretty much spot on for the light rain events, so for instance if my Stratus gets 0.14" my Davis is usually 0.14", unless it all fell in < 5 minutes or something. 

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10 minutes ago, wxmanmitch said:

The percentage of error is definitely more significant the heavier the rain gets, not necessarily the more rain that falls for the event in question. The worst errors seem to occur during thunderstorms. Prior to calibrating my Davis tipper, it was over reporting by an average of 25-30%. It's pretty much spot on for the light rain events, so for instance if my Stratus gets 0.14" my Davis is usually 0.14", unless it all fell in < 5 minutes or something. 

Your scenario is pretty much the same as mine.

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17 minutes ago, wxmanmitch said:

The percentage of error is definitely more significant the heavier the rain gets, not necessarily the more rain that falls for the event in question. The worst errors seem to occur during thunderstorms. Prior to calibrating my Davis tipper, it was over reporting by an average of 25-30%. It's pretty much spot on for the light rain events, so for instance if my Stratus gets 0.14" my Davis is usually 0.14", unless it all fell in < 5 minutes or something. 

Gotcha.  It’s not about an even percent error it’s basically when it rains hard it records high.

Sometimes I do notice that on the PWS network I guess... night before you see all these totals that seem higher but then CoCoRAHS comes out in the morning and it’s generally lower than the vibe you get from the Wunderground maps/networks.

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1 hour ago, powderfreak said:

I feel like that's much more normal than the other way around... the electronic tippers seem more prone to being on the high side though Dryslot in the last post proved not always.

It makes sense though in big rain events if you consider it as a percentage of error, right?  In lighter events you may only notice a very slight difference, but as you magnify the rainfall the difference between the two will grow.  @dendrite is the expert on these things but if that's say an 8-9% error, in a lighter rain event that's only the difference of 0.50" vs. 0.54", which may not be as noticeable? 

Usually the tippers underreport because of splash out from the tipping mechanism. This is mostly during heavy rates with rapid tips. Of course the tipper can be calibrated by turning the set screws. Unscrewing them raises them creating more frequent tips. Screwing them in is obviously the opposite. 
 

The Stratus is only a 4” diameter opening as well. The standard NWS gauge is pricey, but is 8” diameter. All of these gauges are susceptible to errors due to wind turbulence over the gauge although the newer Davis hourglass design minimizes that. 
 

An option for the Davis crowd is to replace the Davis gauge with a Rainwise 8” electronic gauge. I’d have to look up how, but I know there is one that’s compatible. 

Novalynx has a couple of manual 8” gauges...

https://www.scaledinstruments.com/shop/nova-lynx/rain-gauges-2/nova-lynx-260-2510-standard-rain-and-snow-gauge/
 

https://novalynx.com/store/pc/260-2520-Forestry-Rain-Gauge-8p237.htm

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2 hours ago, wxmanmitch said:

3.66" in my Stratus rain gauge, 3.95" in my Davis VP2. I've noticed my Davis tends to over report rain during heavy events, but is very close to the Stratus for the lighter events. Is this normal?

Anyway, drought cancel here. Rivers and streams are flowing vigorously again. Not that there was much of a drought to begin with here...

 

1 hour ago, powderfreak said:

Just got home to an additional 0.14”, I think it was all from one final burst of showers late morning.  Storm total 2.85”.

Send those flows down the Connecticut River, down here it's as low as I've ever seen it.  People are driving their vehicles out on the exposed riverbed across from the casino.  There are rocks and sand bars in the river I haven't seen before, I won't go out in the boat with it this low.

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1 minute ago, TauntonBlizzard2013 said:

All in good fun... appreciate your thoughts... hopefully Monday pans out.... all kidding aside... we could use some more rain

We joke, but I definitely try to give my best thoughts. I’m a little nervous about Monday, but gut says we should get some rain. 

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2 hours ago, Brewbeer said:

 

Send those flows down the Connecticut River, down here it's as low as I've ever seen it.  People are driving their vehicles out on the exposed riverbed across from the casino.  There are rocks and sand bars in the river I haven't seen before, I won't go out in the boat with it this low.

Riverfront Park or on the West Side ?

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14 hours ago, Brewbeer said:

 

Send those flows down the Connecticut River, down here it's as low as I've ever seen it.  People are driving their vehicles out on the exposed riverbed across from the casino.  There are rocks and sand bars in the river I haven't seen before, I won't go out in the boat with it this low.

I've seen people drive out in years past but definitely  is low.. 

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16 minutes ago, PhineasC said:

The Randolph CoCoRaHS observer recorded 2.10" for the storm. I recorded 3.10" in my PWS.

I'm going to assume his readings are more correct, because I can't see there being a full inch difference in rainfall between our two locations. 

Although I see he didn't record any rain after 0930. We had several large showers come through after that. No way they all missed his location. Se it seems his numbers are not totally complete.

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4 minutes ago, PhineasC said:

Although I see he didn't record any rain after 0930. We had several large showers come through after that. No way they all missed his location. Se it seems his numbers are not totally complete.

Maybe there were wind issues? I think you need some more examples to see if there indeed is a weird discrepancy. 

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24 minutes ago, PhineasC said:

Although I see he didn't record any rain after 0930. We had several large showers come through after that. No way they all missed his location. Se it seems his numbers are not totally complete.

You need to get the stratus gauge I think and more events to test.  I’d have a hard time with that guy not being complete as his notes even mention when a moose farts behind his house between 4:15pm and 4:17pm.  I’ve never seen a Cocorahs with that much daily description every single day lol.  At 10:46pm on 9/27 there were 5,670,545 stars in the sky.

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