National Weather Service United States Department of Commerce

Cloudy skies this morning will give way to partly cloudy skies by afternoon. Temperatures will warm into the upper 60s and lower 70s with northwest winds 15-25 mph.
After a break in the rain chances on Monday and Tuesday, a cold front will bring chanced for showers and a few storms Tuesday night through Wednesday night. Severe storms are not expected a this time. It will be much cooler on Wednesday following the front's passage with temperatures lingering mostly in the 50s.
Temperatures will be mostly near or below normal this week due to a pair of cold fronts. Tuesday will be the warmest day with highs in the 70s and 80s. Lows will be in the upper 40s and 50s for the next several days.

 
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Preliminary Collin and Grayson County Tornado Track

Collin and Grayson County Tornado Track Map.