|24hr wind gust plot. From 15mph in St Helena to 50mph on Mount Hood just 3 miles away.|
Fortunately I already had wind speed mapping on the back burner - it didn't get deployed along with the earlier temperature and precipitation work, but most of that code was reusable. I can't show wind direction - even if I were to render directional arrows on the map, frequent direction changes make it impossible to show a single meaningful 24hr or 36hr wind direction. However peak forecasted wind speeds and gusts are shown for 1hr, 6hr, 12hr, 24hr and 36hr intervals, using the same green-yellow-orange-red-purple-blue-black gradient scale as the temperature layer.
One option that does provide wind direction is the crowd favorite windy.com. However, windy does not reflect the small-scale variations in the NWS forecast grid (see below). As with temperature and precipitation, it's an open question as to how accurate the NWS grid variations are, but I like to provide as much raw data as possible and let users draw their own conclusions.
|Windy.com plot of the same location|
The forecast grid option immediately below will also show point speeds (remember, the point is simply the center of a grid square, and the forecast applies to the entire square), and clicking on a point will bring up the hourly weather chart.
I feel like I've pretty much run through the backlog of fire-related items I had sitting around, so I think this will be the last major layer change in response to the Northern California fires.
Update: there are now two wind layers, the "max wind speed" layer as described above, and a "wind plot" that provides forecasted directions and speeds for specific points in times, at 3 hour intervals to 12 hours, and then 6 hour intervals to 36 hours. The same color chart is used for speed, with short lines tracing direction. The length of the lines has no meaning.