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Weather Outlook

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Coyote Wash Weather Station

Date & Time:  10/30/2014 8:28 AM MST
Forecaster:  Henz, D.


Lots to talk about in today’s extended Outlook. High pressure will remain in place over the Desert Southwest today and tomorrow lending to above average temperatures over the lower deserts and quiet weather (outside of some passing high clouds this afternoon). Big changes come this weekend though as a large upper level trough sets up across the western US allowing several shortwave disturbances to move through the state bringing out first big cool down of the Fall and slight chances for a few showers during the day Saturday and Sunday.


For today plan on mostly sunny skies early on with a noticeable uptick in high clouds this afternoon/evening. Afternoon temperatures will be similar to yesterday warming into the 88˚F-93˚F range around the Valley with higher terrain areas reaching the low to mid 80s. Variable winds will remain in the light category throughout the day with no noteworthy gusts. Overnight lows will dip into the mid 60s around the urban corridor with low 60s for outlying communities under partly cloudy skies and nearly calm winds.


For the Halloween Holiday, plan on one final day of highs reaching the low 90s under mostly sunny skies. Winds will be out of the east/southeast in the 4-10mph range with localized afternoon gusts around 15mph especially over the higher terrain areas. The trick-or-treat forecast is looking great with temperatures remaining in the low 80s to upper 70s through the mid-evening hours. The first disturbance with an attendant cold front will move through the region on Saturday. Plan on breezier conditions (8-16mph with gusts around 20-25mph) and daytime highs relegated to the low to mid 80s. Increased cloudiness and some light sprinkles will likely accompany the frontal passage with sunnier skies on either side of the front. A second disturbance will move across the region into Sunday bringing another shot of colder air (highs limited to the low 70s) and modest chances for light showers/light rain mainly confined to the higher terrain regions north of the Valley. Colder weather will linger into Monday and Tuesday of next week.



TABLE 1: Precipitation Forecast by Zone

Forecast Zone

2pm-Noon Chance of Measureable Rain (%)

Prime Time for Heaviest Rain

Maximum Prime Time Rainfall (inches)

Storms Currently Observed (X)

Gila Bend





Palo Verde





Rainbow Valley





West Valley





Northwest Valley





Upper Centennial










New River/Cave Cr





Sycamore Creek





Phoenix North





Phoenix South





Scottsdale North





Scottsdale South





Southeast Valley





Lwr. Salt R. Lakes