FXUS65 KFGZ 192037

AFDFGZ



Area Forecast Discussion

National Weather Service Flagstaff AZ

137 PM MST Thu Mar 19 2026



.SYNOPSIS...Arizona will roast under a summer-like high pressure 

cell, with temperatures reaching 20 to 30 degrees above normal for 

the remainder of this week and into the weekend. Please exercise 

appropriate precautions if you are planning on any outdoor activity 

through the weekend.



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.DISCUSSION...A strong high pressure system will dominate Arizona

weather. High pressure will be strongest on Friday then gradually

weaken and meander southward through next Tuesday or Wednesday. 

As a result, high temperatures will peak out on Friday then 

gradually lower through the middle of next week. In any case, look

for high temperatures 20-30 degrees above average through the

period. Fairly unbelievably, an Extreme Heat Warning is in effect

through Sunday for elevations below 4000 feet across Arizona. 

Starting Saturday, as the high center makes it's slow move 

southward, pressure gradients will strengthen with gusty southwest

winds at 10-20 mph developing each afternoon, especially over the

higher terrain. 



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.AVIATION...Thursday 19/18Z through Friday 20/18Z...VFR

conditions, no precipitation expected. Winds light and variable

5-10kts daytime, light and variable or terrain driven, especially

at KSEZ with winds NE 10-15kts between 03Z-15Z.  



OUTLOOK...Friday 20/18Z through Sunday 22/18Z...VFR conditions, no

precipitation expected. Daytime winds SW-W 5-15kts Friday, SW 

15-25kts Saturday. Light and variable or terrain driven overnight.



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.FIRE WEATHER...Friday and Saturday...Dry and historically warm. 

Daytime temperatures 20-30 degrees above normal each day, with large 

diurnal swings at night. Winds SW-W 5 to 15 mph Friday, becoming SW 

15-25 mph on Saturday.  With increased winds and afternoon RH values 

down between 5-10%, fire weather concerns may be enhanced on 

Saturday.

  

Sunday through Tuesday...Expect temperatures to decrease slightly by 

Sunday or Monday, but still remain at least 20 degrees above normal. 

Winds SW-W to 10-20 mph each day. Minimum RH values between 7-15% 

each day. Enhanced fire weather concerns continue through the period 

as fuels continue drying out due to the high temperatures, low 

humidity and breezy afternoon winds.



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.FGZ WATCHES/WARNINGS/ADVISORIES...

Extreme Heat Warning until 8 PM MST Sunday for AZZ006-037.



&&



$$



PUBLIC...McCollum

AVIATION...Bernhart

FIRE WEATHER...Bernhart



For Northern Arizona weather information visit

weather.gov/flagstaff