When I get the XML feed for forecast, the first day is yesterday’s date starting at 1900 in the timeframes, followed by day data for today’s date, starting with 0100 in the timeframes, which is also in the past. The location string is us.29928.
Is this normal behavior I need to program around or is it an error in the API?

Update: when I request forecast data prior to 1900 I get data starting with 1900 of the previous day. If I wait until after 1900 I get today’s forecast starting with 1900, even if I make the request at 2100 or 2200. Interesting behavior.

I was wondering the same thing until I looked real hard at the data. It’s a time zone thing. 1900 Eastern time = midnight UTC on the next day