Read the statement by Michael Teeuw here.
MMM-RainForecast
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 Sucessfully installed MMM-RainForecast and it only displays a very narrow window. I tried increasing limitMapWidth: 0, to 300. display area is larger but still only displays a very narrow display any help woud be appreciated thanks 
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 @lparco When you’re saying its displaying a narrow window, are you meaning the data shown is only for a narrow period of time or can you share a screenshot? 
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 @Wenike trying to post the photo 
 Can’t paste or use photo attach
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 @lparco basically when set to “0” the screen is about 1” wide. When I change it to 300x300 it’s about a 3” square display but the image is still only 1” wide and the rest of the 300x300 is white with no image. Hope this explanation is clear 
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 @lparco you can also try https://github.com/jalibu/MMM-RAIN-MAP which is almost the same module with a few more features. 

