2 ms·
Currently we use SpotWx [0] for 12hr. It gives you the choice of whatever numerical model you like. These are very important for mountain trips because rain in
by lighttower 9y ago
Currently we use SpotWx [0] for 12hr. It gives you the choice of whatever numerical model you like. These are very important for mountain trips because rain in the summer will make things very slippery etc. In the winter (ski-touring), precipitation is not a big deal but avalanche hazard is -- so there are avalanche forecasts [1] and [2]. You'll note that they breakdown the forecast by elevation range, below treeline, treeline, and alpine.
The shortcomings of the existing systems is that it is cumbersome to get elevation properly into the model. SpotWx for example, gives you the forecast for the elevation of the square you clicked on, which is the average of the surrounding elevation. This may be irrelevant if you're walking a ridge vs a valley bottom.
SpotWx, however, does something very right, which is very good hourly breakdown. The avalanche forecasts are typically for a very large area, and the timing of precipitation isn't important, but heating due to temperature change or sun is very important.
[0] spotwx.com/products/grib_index.php?model=hrrr_wrfprsf&lat=49.25963&lon=-123.12047&tz=America/Vancouver
[1] http://www.avalanche.ca/map http://www.avalanche.ca/map
[2] https://www.nwac.us/mountain-weather-forecast/current/ https://www.nwac.us/mountain-weather-forecast/current/
- milancurcic 9y agoNice! The terrain issue that you mention is the limitation of the grid resolution. For example, HRRR, the operational model used in the charts in your link, has 3 km horizontal spacing. Individual peaks and slopes are poorly resolved at that resolution. We are already (internally) experimenting with 1 km and sub-1-km grid resolutions using HRRR as initial and boundary conditions. Creating custom forecast domains at fine resolutions is something that we are currently developing and should be ready in the next 2-3 months. Thank you very much for your input, it's super helpful!
- lighttower 9y agoYou've got my email address from the email I sent you regarding the malfunctioning CC form. I've got a bunch of super eager UA-testers from BC Mountaineering Club if you're interested.
- milancurcic 9y agoFantastic, thank you, I will follow up!