@needsomecoffee said in GFS (NOAA) Forecast Inaccuracies:
unless this gets fixed. (Again, this problem appeared recently. It did not exist previously.)
Windy will not fix the GFS temperature issue on this island. Windy cannot change the GFS resolution.
To be more clear, here are the 4 points of GFS grid as shown by https://spotwx.com/ . One is on the island, the 3 others are over the sea. Interpolating (averaging) the temperatures of these 4 points cannot give a good temperature over the land of the island in the hotter hours in summer.
713A36B9-D423-4E3A-B14F-6EA68581BDE7.jpeg
64719189-B615-4BB9-AED7-E8801A87DE67.jpeg
BTW HRRR is more precise because the 4 points are on the land.
Why does the NOAA give a good temperature with GFS?
Probably because they use the nearest point of the 4, in this case that on the land. They do not average the 4 temperatures.
Why can’t Windy do the same instead of averaging the 4 temperatures?
Because this is the only way to draw a temperature map. The ‘nearest point’ can only be used for a point forecast.
Why some months ago, GFS was providing correct temperatures in Windy?
Probably because at that time of the year, the temperature over the land and that over the sea were not so different as they are in summer.
