I've replicated the following in both Chrome and MS Edge browsers:

• Bring up the Embed "builder" UI (eg here)
• Zoom in a little (not sure this is necessary)
• Turn on the Spot forecast
• Now click-drag the map down/right, (scrolling to mark the correct location for the spot forecast, a spot NW of what I see)

Not every time, but incredibly easy to replicate the UI going into an endless loop. The following is what I see, and is my guess as to the actual bug

• Draws with forecast
• But forecast covers the current spot
• So it redraws without forecast
• Yet I dragged the map and actually want to mark a spot that will move the old spot off the map
• So it moves the map (but hasn't yet moved the spot -- is this the bug?)
• And we're back to step one in the loop!

The optionally embedded spot forecast (&detail=true) is wonderful in many ways.

However, it has one weakness: in regions where winter is typically cold

• the rainfall forecast is useless
• a snow forecast would be quite useful

Any way that could be settable and/or automatically adjusted?

When I look at the various API's, both commercial and free, it appears that both pressure and temperature isolines are supported pretty much across the board.

However, I can't find documentation or examples of how to enable temp isoline in an embedded/iframe URL.

Is that possible, or did I just create a feature request? ;)

Thanks heaps!