|
Flagstaff, Arizona 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
|
NWS Forecast for Flagstaff AZ
National Weather Service Forecast for:
Flagstaff AZ
Issued by: National Weather Service Flagstaff, AZ |
| Updated: 9:16 am MST Aug 12, 2025 |
|
This
Afternoon
Slight Chance
T-storms
|
Tonight
Slight Chance
T-storms then
Mostly Clear
|
Wednesday
Showers
Likely
|
Wednesday
Night
Chance
Showers then
Partly Cloudy
|
Thursday
Chance
T-storms
|
Thursday
Night
Chance
T-storms then
Chance
Showers
|
Friday
T-storms
Likely
|
Friday
Night
Chance
T-storms then
Chance
Showers
|
Saturday
Chance
T-storms
|
| Hi 92 °F |
Lo 54 °F |
Hi 89 °F |
Lo 55 °F |
Hi 86 °F |
Lo 51 °F |
Hi 80 °F |
Lo 49 °F |
Hi 80 °F |
|
This Afternoon
|
A 10 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. West wind 8 to 10 mph, with gusts as high as 17 mph. |
Tonight
|
A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 54. Southwest wind 5 to 9 mph, with gusts as high as 15 mph. |
Wednesday
|
Showers likely and possibly a thunderstorm between 11am and 2pm, then a slight chance of thunderstorms after 2pm. Increasing clouds, with a high near 89. West wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. |
Wednesday Night
|
A slight chance of thunderstorms before 8pm, then a chance of showers between 8pm and 11pm. Mostly cloudy, with a low around 55. West wind 5 to 10 mph becoming light. Winds could gust as high as 17 mph. Chance of precipitation is 40%. |
Thursday
|
A 50 percent chance of showers and thunderstorms, mainly after 11am. Partly sunny, with a high near 86. Southwest wind 7 to 10 mph, with gusts as high as 18 mph. |
Thursday Night
|
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 51. West wind 6 to 9 mph, with gusts as high as 16 mph. |
Friday
|
Showers and thunderstorms likely, mainly after 11am. Partly sunny, with a high near 80. Southwest wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. |
Friday Night
|
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 49. West wind 3 to 8 mph. |
Saturday
|
A 50 percent chance of showers and thunderstorms, mainly after 11am. Partly sunny, with a high near 80. Southwest wind 6 to 10 mph, with gusts as high as 20 mph. |
Saturday Night
|
A 20 percent chance of showers and thunderstorms before 11pm. Mostly clear, with a low around 49. Southwest wind 3 to 8 mph. |
Sunday
|
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82. Southwest wind 5 to 8 mph, with gusts as high as 16 mph. |
Sunday Night
|
A 10 percent chance of showers and thunderstorms. Mostly clear, with a low around 50. West wind 3 to 6 mph. |
Monday
|
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84. Light and variable wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 16 mph. |
Forecast from NOAA-NWS
for Flagstaff AZ.
|
Weather Forecast Discussion
177
FXUS65 KFGZ 121810
AFDFGZ
Area Forecast Discussion
National Weather Service Flagstaff AZ
1110 AM MST Tue Aug 12 2025
.SYNOPSIS...One last day of hot and mainly dry conditions today,
before increasing monsoonal moisture and cooler temperatures set
in through the end of the week. The best chances for thunderstorms
will be Thursday and Friday. Drier and warmer conditions look to
gradually return by the start of next week.
&&
.DISCUSSION...Today...Another round of isolated showers and
thunderstorms looks to develop this afternoon, mainly along and
south of the Mogollon Rim. Elsewhere, hot and dry conditions look
to remain across the area. While a few brief heavy downpours and
small hail will be possible with any stronger storm, gusty winds
look to be the primary threat this afternoon with these storms.
Wednesday through Friday...The high looks to gradually shift
eastward across the southwest as a trough sets up over the
northwestern US. This looks to open the door for more favorable
northward advection of monsoonal moisture, and thus better chances
for at least scattered showers and thunderstorms each day.
The coverage any given day however remains somewhat uncertain, as it
will be highly dependent upon just how far northward the moisture
can get as well as any remaining debris cloud from the previous
day. Model soundings also still show an strong inverted-v profile,
especially in the first couple of days, indicative of a still dry
sub- cloud layer despite the increased PWATs. Thus, gusty winds
still look to be the primary threat, more so than flash flooding.
Some localized instances of flooding can not be totally ruled out
from any heavier storms and/or in rain sensitive areas.
Outside of the precipitation chances, a return of cooler, more
seasonable temperatures is expected for the second-half of the
work week.
Saturday through Monday...By the weekend, the aforementioned
trough looks to move closer to Arizona. This looks to bring a
return of drier air to the area, and gradually reduce chances for
precipitation each day. Temperatures also look to gradually rise
by the start of next week, along with breezier winds.
&&
.AVIATION...Tuesday 12/18Z through Wednesday 13/18Z...VFR
conditions. ISO -SHRA/-TSRA between 19Z-03Z, mainly south and east
of a KPRC-KFLG-KRQE line. Winds are W-NW 5-10 kts with gusts
15-20 kts, then light and VRB overnight. Gusty and erratic winds
are possible near storms.
OUTLOOK...Wednesday 13/18Z through Friday 15/18Z... Primarily VFR
conditions. ISO-SCT SHRA/TSRA each afternoon, especially over the
higher terrain. Brief drops to MVFR conditions with gusty/erratic
winds can be expected in and around storms. Daytime winds are W
5-15 kts with gusts 15-25 kts. Winds are light and VRB during the
overnight periods.
&&
.FIRE WEATHER...Today and Wednesday...Hot and mainly dry conditions
continue today, outside of a slight chance for thunderstorms from
the Mogollon Rim and southward. Better chances for thunderstorms and
cooler temperatures then begin to set in on Wednesday, mainly from
the Grand Canyon along Mogollon Rim and south. Daytime winds
west/northwest at 5-15 mph. Gusty outflow winds possible in and
around thunderstorms.
Thursday through Saturday...Turning cooler. Scattered showers and
thunderstorms possible each afternoon, especially Thursday and
Friday. Best chances for precipitation will be over the higher
terrain. Winds west/southwest around 10-20 mph each day. Gusty
outflow winds possible in and around thunderstorms.
&&
.FGZ WATCHES/WARNINGS/ADVISORIES...
Extreme Heat Warning until 8 PM MST Thursday for AZZ006.
&&
$$
PUBLIC...Humphreys
AVIATION...Humphreys
FIRE WEATHER...Lewandowski
For Northern Arizona weather information visit
weather.gov/flagstaff
View a Different U.S. Forecast Discussion Location
(In alphabetical order by state)
|
|
|
|
