Strong gusty winds developed ahead of a late season winter storm moving towards Arizona.
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The episode as NWS FGZ wrote it up.
Strong gusty winds developed ahead of a late season winter storm moving towards Arizona.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Flagstaff, AZ wrote its last area forecast discussion before the first event at Apr 17, 2:06 PM MST, 0 minutes earlier.
Area Forecast Discussion National Weather Service Flagstaff AZ 206 PM MST Thu Apr 17 2025 .SYNOPSIS...A strong area of low pressure will move across Arizona tonight through Saturday. This will continue the strong winds today and then rain showers and snow showers move through late tonight through Saturday afternoon. Warm and dry conditions quickly return Sunday onward. && .DISCUSSION...A strong area of low pressure is moving southward through the Great Basin this afternoon and another area of low pressure is just off the coast of San Diego. There is a currently a frontal boundary extending from near the LA Basin, just north of Las Vegas, across Utah, and into Wyoming. The southern low will move eastward this evening and join the frontal boundary. Precipitation has already started over the Kaibab Plateau this afternoon. The low will continue to move southward and into northern Arizona Friday afternoon and into New Mexico during the day Saturday. Higher pressure will move over Arizona as a zonal flow sets up starting Saturday night. We have a variety of headlines to cover this storm system. 1) A Red Flag Warning is in effect into this evening due to the strong winds, low humidity, and high fire danger for portions of northern Arizona north and east of the Mogollon Rim and White Mountains to the Four Corners area. 2) Wind advisory is in effect into this evening for portions of northern Arizona from the Kiabab Plateau. , Mogollon Rim, to the White Mountains extending north and east to the Four Corners. 3) A Winter Weather Advisory is in effect for the Kaibab Plateau above 7000 feet from this evening through the day Friday. 4) A Winter Weather Advisory is in effect for the White Mountains and Chuska Mountains/Defiance Plateau Friday evening through the day Saturday. From Sunday onward, seasonably warm temperatures, dry conditions, and breezy afternoon will return as a zonal flow will set-up across the Southwest. && && .AVIATION...Thursday 17/18Z through Friday 18/18Z...VFR conditions through 03Z Friday, then periods of MVFR-IFR as a band of SHRA/SHSN enters from the northwest and moves southeast thereafter. Winds today are SW 20-30 kts with gusts up to 40 kts. Winds remain elevated tonight at 10-15 kts and up to 20 kts along SE slopes of higher terrain. OUTLOOK...Friday 18/18Z through Sunday 20/18Z...MVFR-IFR conditions continue as showers move east. Showers linger in far eastern AZ through 00Z Sunday, then a return to widespread VFR thereafter. Winds are SW-W 15-25 kts gusting to 35 kts on Friday, then W-NW 10-15 kts on Saturday. && .FIRE WEATHER...Today through Saturday...Red Flag Warning in effect today for eastern Arizona where humidity will be lowest at 10- 15%. Winds today are southwest 20-30 mph with gusts 35-45 mph. A band of rain and high elevation snow showers moves in from northwest to southeast tonight, becoming widespread Friday with much cooler temperatures. Showers will linger through far eastern AZ thereafter, with activity mostly ending by Saturday afternoon. Winds are southwest through west 15-25 mph with gusts up to 35-40 mph on Friday, then west through northwest 5-15 mph on Saturday. Sunday through Tuesday...Warming and drying trend. Near average temperatures on Sunday with winds generally west at 10 mph. Slightly above average temperatures on Monday and Tuesday, with winds southwest through west 10-15 mph. && .FGZ WATCHES/WARNINGS/ADVISORIES... Wind Advisory until 8 PM MST /9 PM MDT/ this evening for AZZ004- 006-010>017-039-040. Winter Weather Advisory from 8 PM this evening to 5 PM MST Friday for AZZ004. Red Flag Warning until 8 PM MST /9 PM MDT/ this evening for AZZ110>114-117-139-140. Winter Weather Advisory from 5 PM MST /6 PM MDT/ Friday to 5 PM MST /6 PM MDT/ Saturday for AZZ011-017. && PUBLIC...MAS AVIATION...Lewandowski FIRE WEATHER...Lewandowski For Northern Arizona weather information visit weather.gov/flagstaff
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
A peak wind gust of 63 mph was measured at the Winslow Airport ASOS (KINW).
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2025Every state in 2025This day in weather historyWarnings in Arizona, April 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1246963.