Vue forecast

[arrowspace90]

 

I know some clever person was here who delved deeply into the secret algorithm used by Davis to show the little forecast icon on the Vue screen.

Well, today here in North Central Texas, the corrected barometer is reading a "low" 29.74 inches.  However, the humidity is only 30%.
The icon shows rain falling from a cloud. 

But in fact, the sun is shining brightly, and there is no rain in the "real" forecast.  Does that algorithm consider anything except the barometric pressure?

I hope not too much of the money a customer spends on a Vue goes into the forecast algorithm.
It's fantastic at reporting the current conditions it is able to measure.  As a forecaster, I don't pay much attention to it.

[C5250]

It's believed to be a variant of the Sager algorithm.

Can't say I ever really look at it, as there are not enough inputs for a truly reliable forecast. It's probably better than the forecasts seen on some barometers, but probably still best considered a novelty.

[xykotik]

It's much less accurate than the NWS or even WU around here (Puget Sound region, Washington State, USA) but it doesn't account for specific trends in unique geographic regions.  For that reason, I don't remember the last time I even looked at the "forecast" icon on my Vue console.  It may be more accurate in the San Francisco Bay, California USA area, where Davis HQ resides.

YMMV.

[VaJim]

  As a forecaster, I don't pay much attention to it.

...as a weather hobbyist....I can hardly see it.....you're kidding right?

[north of 60]

those forecasts on davis weather stations are a joke,  you guys are f**kin crazy for believing them,  the groundhog is better choice.

[d_l]

I don't know about the accuracy of the Vue, but I'll bet I could make big money betting on my VP2's forecasts vs. the NWS forecasts for the one to two day out period.

I've seen numerous VP2 rain forecasts when the NWS had absolutely nothing about rain.  For the first few of these discrepancies,  I thought the VP2 had slipped up, but invariably the day ended up with strong virga conditions.  Sometimes you have to know how to interpret the forecasts for your locality.

[LFWX]

It's much less accurate than the NWS or even WU around here (Puget Sound region, Washington State, USA) but it doesn't account for specific trends in unique geographic regions.  For that reason, I don't remember the last time I even looked at the "forecast" icon on my Vue console.  It may be more accurate in the San Francisco Bay, California USA area, where Davis HQ resides.

YMMV.

I may be thinking of a different weather station but...is there some type of sensitivity setting for the barometric trend part of the algorithm?

I do know the Davis algorithm uses barometric pressure, wind, rainfall, temperature, humidity, latitude and longitude.

[arrowspace90]

  As a forecaster, I don't pay much attention to it.

...as a weather hobbyist....I can hardly see it.....you're kidding right?

Ha, well I meant as far as the Vue being a forecaster.  I myself couldn't forecast my way out of my front door.

[Wx4U]

"COME ON!" Does anyone seriously believe a single instrument containing barometric pressure, humidity, temperatrue, and wind sensors can forecast the weather. Worldwide national weather services and commercial companies (and your local TV stations) spend millions on forecasts. What do you suppose their degree of accuracy might be?

[d_l]

"COME ON!" Does anyone seriously believe a single instrument containing barometric pressure, humidity, temperatrue, and wind sensors can forecast the weather. Worldwide national weather services and commercial companies (and your local TV stations) spend millions on forecasts. What do you suppose their degree of accuracy might be?

I do.  Arctic climatologists and weather forecasters employed by the Army taught me the use of the Sager Weathercaster.  It worked quite well back then and still does.

[SlowModem]

"COME ON!" Does anyone seriously believe a single instrument containing barometric pressure, humidity, temperatrue, and wind sensors can forecast the weather?

Sure!  Here's one:

[Brian]

I have been using my new Vue for 3 weeks now.  It was a few days before I realised just how erroneous the Vue Console Forecaster is.

We have been going thru the driest period since records began around c. 1875.  All  I could get from the Vue display on the Console was a rain bearing cloud for at least 10 days continuously, and it was not until the Barometer went back up to 1016 Kpa did the rain disappear from below the cloud. Later that day it condescended to provide a view of the full sun for an hour or so.

. I desperation I managed to find a site which featured Sager WeatherCaster.  I found by feeding the data obtained by Davis Vue into Weathercaster I got a very accurate forecast which compared to that actually being experienced and compared most favourably to that of the local Met' Station 7 kms distant.

I read somewhere in this forum that Davis V/Vue takes a while to settle in before a reasonably accurate forecast is forthcoming from the device. At this stage all I can say is "Maybe, maybe not"

Brian

[dalecoy]

I have been using my new Vue for 3 weeks now.  It was a few days before I realised just how erroneous the Vue Console Forecaster is.
...
Brian

It will probably get better - but how much of your purchase decision was because of the forecast icon?

[Brian]

Never really thought about it much until I was running the Vue in. As for the the data I reckon the Davis Vue is tops.  The forecast side of things seems to be behaving a bit more like normal these past 3 days or so. (As one would expect).   In Oz we pay about AU$800 for the Vue with  Weatherlink. seems to be much cheaper Stateside.

B

[dalecoy]

Given that the Vue can't see anything, just knows about some data at one location, and doesn't remember very much.....

Compared to a person who may have access to radar, satellite, hundreds or thousands of observations over a wide area, powerful computers and million-dollar models....