Add get_load_forecast...

[williamhobbs]

Start with IFS ensemble, then IFS and GFS.

Forecasted variables should include:

• 2m temperature
• max/min 2m temp (IFS and GFS have this)
• 2m RH
• 2m Wet Bulb Temperature* [1]
• 10m Wind speed [2]
• GHI
• [maybe?] DNI
• [maybe?] total cloud cover
• [maybe?] surface/soil temperature
• [maybe?] precipitation

Also consider adding:

• time-lagged observed temperature**
• other observations?

* Calculating wet bulb
NWPs don't seem to have wet bulb.

• Calculate wet bulb temp from 2m temp (dry bulb) and 2m RH (Stull 2011, or 1/2 or 1/3 rules from https://journals.ametsoc.org/view/journals/bams/98/9/bams-d-16-0246.1.xml).
• GFS has 2m RH (https://www.nco.ncep.noaa.gov/pmb/products/gfs/gfs.t00z.pgrb2.0p25.f003.shtml)
• IFS does not have 2m RH (https://www.ecmwf.int/en/forecasts/datasets/open-data), so
  • RH can come from 2m temp and 2m dew point (https://bmcnoldy.earth.miami.edu/Humidity.html)

** Need to find a real-time analysis dataset? Maybe GFS/GDAS analysis, or RTMA? Also consider HRRR f00.

[1] https://www.nyiso.com/documents/20142/20053386/LFU_Whitepaper_Phase1_Results.pdf
[2] https://www.mdpi.com/2071-1050/9/5/795