Area Forecast Discussion
Issued by NWS Flagstaff, AZ
Issued by NWS Flagstaff, AZ
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303 FXUS65 KFGZ 071621 AFDFGZ Area Forecast Discussion National Weather Service Flagstaff AZ 921 AM MST Sun Jul 7 2024 .SYNOPSIS...Hot and dry conditions will continue for most of northern Arizona through Tuesday with a gradual return of monsoon moisture and thunderstorm chances heading into next weekend. && .UPDATE...Warm start to the day will translate into another hot one across the region. A fire in Utah continues to put off quite a bit of smoke and it can be seen on satellite pushing pretty far south and on into Mexico this morning. Expect that smoke/haze will be around for a while so do not be surprised if you smell smoke in the air today or see hazy skies. Strongest smells will likely be off towards the Lake Powell/Page area but with so much smoke aloft, it could linger in spots. As the winds pick up through the day, it should disperse a bit more but will likely start to settle once again this evening. Forecast looks to be on track this morning with only minor edits needed. Stay cool out there today! && .PREV DISCUSSION /340 AM MST/...A strong and dry high pressure systems will remain centered over the western states through Wednesday then gradually shift eastward toward the end of the week allowing for an increase in monsoon moisture and thunderstorm chances. Today through Tuesday...Strong high pressure and a hot/dry northerly flow from over the Great Basin will continue. Near record to record high temperatures will continue as well as an Excessive heat Warning for elevations below 4000 feet. There is always some chance limited moisture could sneak over the eastern Mogollon Rim or White Mountains during this period but will result in only virga showers or brief sprinkles at the surface. It`s just too dry for anything more. From Wednesday onward...As the high center gradually shifts eastward the door will open to increasing monsoon moisture as the flow becomes more southerly to southeasterly. Moisture will move in first to the White Mountains and eastern Mogollon on Wednesday and Thursday with an isolated threat of afternoon thunderstorms developing. Forecast models in good agreement in shifting the high center even further east becoming centered over the central to southern United States next weekend. Under this pattern deep southerly flow is expected to develop opening the door to widespread shower and thunderstorm activity across northern Arizona. We`ll be keeping an eye on this but the end of our heat wave and the return of weather more typical of July is in sight. && .AVIATION...Sunday 07/12Z through Monday 08/12Z...Expect VFR conditions with little to no cloud cover. Afternoon west-northwest winds, 10-20 kts with gusts up to 25 kts, becoming northeast 5-10 kts after 03Z. OUTLOOK...Monday 08/12Z through Wednesday 10/12Z...VFR conditions persist through Wednesday with variable cloud cover. Expect northerly winds, 10-20 kts, each afternoon. && .FIRE WEATHER...Today through Monday...Expect the hot and dry conditions to persist each day with high pressure in place. Widespread, single-digit minimum humidity is forecast each afternoon with poor to moderate recoveries overnight. Anticipate stronger northwest winds for this afternoon, 15 to 30 mph, becoming more north, 10 to 25 mph, on Monday. Tuesday through Thursday...Hot, above average temperatures continue each day. Moisture begins to gradually increase from the southeast with chances for showers and thunderstorms in the White Mountains on Tuesday and Wednesday, extending towards the west on Thursday. Afternoon humidity looks to remain below 15% each day along with lighter northerly winds, 10 to 20 mph. && .FGZ WATCHES/WARNINGS/ADVISORIES... Excessive Heat Warning until 8 PM MST /9 PM MDT/ Tuesday for AZZ005-006-037. && $$ PUBLIC...Meola/McCollum AVIATION...LaGuardia FIRE WEATHER...LaGuardia For Northern Arizona weather information visit weather.gov/flagstaff