756
FXUS65 KFGZ 090509
AFDFGZ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1009 PM MST MON SEP 8 2025
SYNOPSIS
WARM AND DRY CONDITIONS ARE EXPECTED FOR THE START OF
THE WEEK. EXPECT BREEZY AND COOLER WEATHER FROM WEDNESDAY THROUGH
FRIDAY, WITH CHANCES FOR SHOWERS AND THUNDERSTORMS. DRY CONDITIONS
DEVELOP AGAIN FOR THE WEEKEND.
DISCUSSION
A SLOW MOVING TROUGH WILL MEANDER THROUGH THE WESTERN
STATES FOR THE NEXT WEEK OR SO, SIGNIFICANTLY CHANGING OUR WEATHER.
AHEAD OF THE TROUGH, MUCH DRIER MID-LEVEL AIR HAS MOVED INTO ARIZONA
TODAY AND HAS CAPPED THE ATMOSPHERE. HIGH HGHTS AND ANTI-CYCLONIC
FLOW WILL TRANSITION TO LOWER HGHTS AND CYCLONIC FLOW AS EARLY AS
TUESDAY. THIS ALSO MEANS INCREASED SOUTHWEST WINDS, ESPECIALLY
WEDNESDAY AND THURSDAY, AS THE TROUGH MOVES INTO THE GREAT BASIN.
THE TROUGH MAY TAP INTO SOME OF THE REMNANT MONSOONAL MOISTURE POOL
BY MID-WEEK, WHICH COULD LEAD TO SOME STRONGER THUNDERSTORMS. THE
BEST CHANCE FOR THIS MOISTURE TAP LOOKS LIKE EASTERN ARIZONA. THE
BIGGER STORY IS THE WINDS, WHICH MAY TOP 40 MPH BY THURSDAY, THIS
WILL BE THE MOST WIND SEEN IN SOME TIME. FIRE DANGER ISN'T HORRIBLE
RIGHT NOW, BUT THIS PATTERN WILL NEED TO BE WATCHED.
BY NEXT WEEKEND, THE TROUGH EJECTS AND WINDS WILL COME DOWN. THE AIR
MASS TRAILING THE TROUGH WILL BE QUITE DRY, SO EXPECT A SUNNY AND
SEASONABLY COOL WEEKEND.
AVIATION...TUESDAY 09/06Z THROUGH WEDNESDAY 10/06Z
VFR CONDITIONS.
WINDS LIGHT/VARIABLE OVERNIGHT, THEN S-SW 10-15 KTS WITH GUSTS
20-25 KTS AFTER 17Z-02Z.
OUTLOOK...WEDNESDAY 10/06Z THROUGH FRIDAY 12/06Z...VFR CONDITIONS.
ISOLATED -SHRA/-TSRA POSSIBLE EAST OF A KPAN-0V7 LINE WEDNESDAY
THROUGH THURSDAY. DAYTIME WINDS S-SW 15-20 KTS WITH GUSTS 25-35
KTS. OVERNIGHT WINDS WILL LIKELY REMAIN ELEVATED DOWNWIND OF THE
HIGHER TERRAIN TUESDAY AND WEDNESDAY NIGHTS.
FIRE WEATHER...TUESDAY AND WEDNESDAY
DRY AND WARM CONDITIONS,
OUTSIDE OF A SLIGHT CHANCE FOR SHOWERS AND THUNDERSTORM ACROSS
EASTERN ARIZONA ON WEDNESDAY. SOUTH THROUGH SOUTHWEST WINDS 10-20
MPH EACH DAY, GUSTS UP TO 35 MPH BY WEDNESDAY. MINIMUM RH VALUES
15-30% EACH DAY.
THURSDAY THROUGH SATURDAY...TURNING COOLER. SLIGHT CHANCE FOR
SHOWERS AND THUNDERSTORMS THURSDAY AND FRIDAY, MAINLY ACROSS THE
EASTERN-HALF OF THE STATE. SOUTH THROUGH SOUTHWEST WINDS 10-20 MPH
THURSDAY, WITH GUSTS UP TO 35 MPH. SOUTH WINDS FROM 10-20 MPH ON
FRIDAY, BECOMING SOUTHWEST 5-15 MPH FOR SATURDAY. MINIMUM RH VALUES
AROUND 15-35% ON THURSDAY, 10-30% FOR FRIDAY AND SATURDAY.
FGZ WATCHES/WARNINGS/ADVISORIES
NONE.
PUBLIC...PETERSON
AVIATION...JJ
FIRE WEATHER...HUMPHREYS
FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT
WEATHER.GOV/FLAGSTAFF
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