417
FXUS65 KFGZ 130527
AFDFGZ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1027 PM MST SUN JUL 12 2026
SYNOPSIS
MONSOON MOISTURE WILL RETURN TO THE AREA THROUGH THE
COMING WEEK BRINGING BETTER STORM CHANCES, ESPECIALLY FOR AREAS
ALONG AND SOUTH OF THE MOGOLLON RIM. WITH THE ADDED MOISTURE,
HOT TEMPERATURES BEGIN TO TREND DOWNWARD MONDAY ENDING UP TOWARDS
SEASONAL AVERAGES LATER IN THE WEEK.
DISCUSSION
A STRONG HIGH PRESSURE SYSTEM ALOFT WAS IN THE
PROCESS OF BUILDING OVER THE NORTH-CENTRAL UNITED STATES. THE
POSITION OF THE HIGH WILL PLACE MUCH OF ARIZONA IN A FAVORABLE
POSITION FOR INCREASING MONSOON MOISTURE OVER THE COMING WEEK.
FOR TODAY...THUNDERSTORM COMPLEXES OVER SOUTHERN ARIZONA AND
NORTHWEST MEXICO LAST NIGHT COLLAPSED PUSHING MOISTURE NORTHWARD
ACROSS PORTIONS OF SOUTH AND CENTRAL ARIZONA. THE RESULT, DEEP
MOISTURE IS IN PLACE FROM ABOUT THE MOGOLLON RIM SOUTHWARD. MODEL
SOUNDING CAPE VALUES RANGE FROM AROUND 200 J/KG ACROSS THE
MOGOLLON RIM TO 400-600 J/KG AT LOWER ELEVATION SOUTH OF THE
RIM. AS STORMS BUILD OVER THE HIGHER TERRAIN OF THE MOGOLLON RIM,
WHITE MOUNTAINS AND SAN FRANCISCO PEAKS WITH DAYTIME HEATING STORM
MOTION TO THE WEST AND SOUTHWEST IS EXPECTED (A COMBINATION OF
STEERING FLOW ALOFT AND DOWNSLOPE MOVING OUTFLOW). THE STRONGEST
STORMS ARE EXPECTED TO BE TOWARD THE SOUTHERN EDGE OF THE MOGOLLON
RIM SOUTHWARD ACROSS YAVAPAI AND GILA COUNTIES WHERE THE HIGHEST
CAPE VALUES WILL BE FOUND. WITH HOT TEMPERATURES CONTINUING AT THE
LOWER ELEVATIONS ANY THUNDERSTORM DOWNPOURS WILL BE CAPABLE OF
PRODUCING 45-60 MPH WINDS GUSTS, THE RESULT OF EVAPORATIONAL
COOLING. AS USUAL, LOCALIZED DOWNPOURS IN EXCESS OF 1.0 INCH IN
LESS THAN AN HOUR ARE LIKELY. VALUES OF CAPE SOUTH OF THE RIM ARE
SUCH THAT AN ISOLATED STORM OR TWO WILL BE CAPABLE OF PRODUCING
NICKLE SIZE HAIL. ELSEWHERE, FURTHER NORTH AND EAST WEAKER AND
MORE ISOLATED STORMS ARE EXPECTED AS MOISTURE IS LAKING FURTHER
NORTH.
FOR THE REMAINDER OF THE WEEK...THE HIGH ALOFT WILL REMAIN OVER
THE NORTH-CENTRAL UNITED STATES INTO WEDNESDAY BEFORE AN INVERTED
TROUGH MOVING FROM EAST TO WEST (SOUTH OF THE HIGH CENTER)
DOMINATES THE WEATHER ACROSS THE SOUTHWEST UNITED STATES THROUGH
NEXT WEEKEND. THE NET RESULT IS THE DOOR WILL REMAIN OPEN TO THE
CONTINUED INTRUSION OF MOISTURE FROM OVER THE GULF OF CALIFORNIA
AND NORTHWEST MEXICO, GRADUALLY WORKING IT'S WAY FURTHER NORTH.
LOOK FOR ACTIVE MONSOON WEATHER TO CONTINUE WITH THE CHANCES FOR
DAILY SHOWERS AND THUNDERSTORMS CONTINUING THROUGH INTO NEXT
WEEKEND.
AVIATION...MONDAY 13/06Z THROUGH TUESDAY 14/06Z
STORM ACTIVITY
IS ON THE DECLINE, ALTHOUGH ISOLATED STORMS REMAIN SOUTH OF
INTERSTATE 40 IN NAVAJO AND APACHE COUNTIES. MVFR VISIBILITIES ARE
POSSIBLE NEAR THE HEAVIEST STORMS. AFTER 18Z MONDAY, SCATTERED
SHOWERS AND THUNDERSTORMS WILL REDEVELOP OVER THE HIGHER TERRAIN
BEFORE MOVING WESTWARD AS THE DAY PROGRESSES. BRIEF MVFR/IFR
VISIBILITIES ARE POSSIBLE UNDER THE STRONGEST STORMS. WINDS WILL
GENERALLY BE LIGHT THROUGH THE PERIOD, ALTHOUGH GUSTY AND ERRATIC
DOWNDRAFT WINDS OF 30-40 KTS ARE POSSIBLE NEAR THUNDERSTORMS.
STORM ACTIVITY WILL DECLINE OVERNIGHT.
OUTLOOK...TUESDAY 14/06Z THROUGH THURSDAY 16/06Z...SCATTERED
SHOWERS AND THUNDERSTORMS ARE FORECAST ACROSS MOST OF NORTHERN
ARIZONA EACH DAY, MAINLY BETWEEN 18Z-04Z. BRIEF MVFR/IFR
VISIBILITIES ARE POSSIBLE UNDER THE STRONGEST STORMS. DAYTIME
WINDS GENERALLY LIGHT SW-SE 5-15KTS, BUT GUSTY AND ERRATIC
DOWNDRAFT WINDS OF 30-40 KTS ARE POSSIBLE NEAR THUNDERSTORMS.
OVERNIGHT, WINDS WILL BE LIGHT AND VARIABLE OR TERRAIN DRIVEN.
FIRE WEATHER...MONDAY AND TUESDAY
TEMPERATURES TRENDING BACK
TOWARDS NORMAL AS MONSOON MOISTURE INCREASES ACROSS THE AREA.
SHOWERS AND THUNDERSTORMS LIKELY EACH AFTERNOON ALONG THE HIGHER
ELEVATIONS WITH A 10-30% CHANCE OF SHOWERS OR THUNDERSTORMS IN THE
HIGH DESERT REGIONS. WINDS S-SE 5-15 MPH MONDAY, S-W 5-15 MPH
TUESDAY. MIN RH'S 15% DESERTS TO 35% MOUNTAINS MONDAY, 15% DESERTS
TO 40% MOUNTAINS TUESDAY.
WEDNESDAY THROUGH FRIDAY...AFTERNOON AND EVENING SHOWERS AND
THUNDERSTORMS LIKELY ACROSS MOST OF THE REGION EACH DAY WITH THE
BEST CHANCES OVER THE HIGHER ELEVATIONS. TEMPERATURES NEAR SEASONAL
AVERAGES. WINDS S-SW 5-15 MPH. MIN RH'S 15-30% DESERTS TO 50-60%
MOUNTAINS.
FGZ WATCHES/WARNINGS/ADVISORIES
NONE.
PUBLIC...MCCOLLUM
AVIATION...RR
FIRE WEATHER...BERNHART
FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT
WEATHER.GOV/FLAGSTAFF
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