Flood Control District

Maricopa County, Arizona

Weather Outlook


Date & Time:  1/17/2017 8:38 AM MST
Forecaster:  Henz, D.

Lots to talk about in today’s forecast as an extended period of unsettled and wet weather is in the cards for later this week as a series of disturbances traverse the Desert Southwest. In the near term (today through Thursday AM), plan on generally quiet weather conditions with near normal daily temperatures hovering in the mid 60s. Looking ahead, our first system should arrive Thursday afternoon/evening bringing widespread light rain and cooler temperatures to the region into Friday morning. A second colder and stronger system will quickly follow for Friday afternoon lasting into Saturday afternoon. Significant valley rain and mountain snowfall is expected during this period to go along with windy conditions and another drop in temperatures.


For today plan on increasing mid and high clouds late morning into the afternoon hours. Daytime temperatures will climb into the 64˚F-67˚F range around the Valley with higher terrain locales remaining in the low 60s. Variable winds will generally remain in the 2-7mph range with no gusts of any consequence. Overnight low temperatures will dip into the mid to low 40s around the urban corridor under mostly clear skies.


For tomorrow plan on a return to mainly sunny skies throughout the day. Afternoon highs will again warm into the 64˚F-67˚F range around the Valley. Variable winds will again remain in the light category with no noteworthy winds throughout the day. Unsettled weather begins Thursday with cloudy/overcast conditions arriving early in the day. Daytime highs should remain in the low 60s with south winds increasing into the 7-12mph range. Widespread showers will overspread the region from west to east through the evening/overnight hours. Colder weather and a second system will arrive on Friday bringing noteworthy valley rain and mountain snow to the region through Saturday. These systems are expected to affect late week/weekend travel. More details on this and an early look at precipitation totals will be covered in tomorrow’s Outlook.



TABLE 1: Weekend Precipitation Forecast by Zone

Forecast Zone

Now-2pm  chance of  Measureable Rain (%)

Prime Time for Heaviest Rain

Maximum Prime Time Rainfall (inches)

Flash Flood Potential

Storms Currently Observed (X)

 Gila Bend






 Palo Verde






 Rainbow Valley






 West Valley






 Northwest Valley






 Upper Centennial












 New River/Cave Cr





 Phoenix North






 Phoenix South






 Scottsdale North






 Scottsdale South






 Southeast Valley






 Lower Salt R. Lakes












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