Possible Cause:

Current weather conditions require run times that exceed the lengths of the water window.

Possible Fixes:

• Change the program in the DAYS/TIMES menu to increase the number of water days.
  
  
• Assign the stations to a program that has more water days.

Clearing a Water Day Alert:

You do not need to do anything to clear the alert. When the program can fit all the necessary irrigation into the programmed days and times, the alert will be resolved.

For information on how to adjust the water days, read:
DAYS/ TIMES: Water Window, Assign Water Mode