A trough of low pressure pushed northeastward across northern Arizona with isolated thunderstorms and heavy rain.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS FGZ wrote it up.
A trough of low pressure pushed northeastward across northern Arizona with isolated thunderstorms and heavy rain.
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 Sep 14, 1:49 PM MST, 3 hours 11 minutes earlier.
Area Forecast Discussion National Weather Service Flagstaff AZ 149 PM MST Wed Sep 14 2022 .SYNOPSIS...Scattered showers and thunderstorms will gradually diminish over northern Arizona later this evening. Drier and more seasonable weather is forecast Thursday through the end of the week. Breezy conditions will develop Saturday and Sunday afternoons. Chances for precipitation will return to the forecast Monday through Wednesday. && .DISCUSSION...Scattered thunderstorms will continue to develop primarily across areas north of I-40 this afternoon. The convection has been moving at a pretty good clip so far. Therefore, continue to think the flash flood threat is low through the remainder of the day. Convection should wane after sunset with the loss of daytime heating. Shortwave ridging and dry southwesterly flow aloft should allow for dry conditions to develop across northern Arizona Thursday through the weekend. Medium range guidance continues to prog a potent upper low digging in just off the California coast over the weekend. This will result in breezy conditions developing across northern Arizona, primarily Saturday and Sunday afternoons. This should also result in a gradual warming trend through the weekend. By Monday, monsoonal moisture should begin its push back into the region. For now think most convection should be confined to the White Mountains Monday afternoon. However, this could change as we get closer to the event. Better chances for thunderstorms are forecast Tuesday given the expected position of the upper low over the Great Basin and upper high over the Southern Plains. There's quite a bit of uncertainty regarding when the moisture will be swept out of the region next Wednesday and beyond. This all hinges on when the upper low decides to lift into the mean flow aloft and takes all the moisture with it. && .AVIATION...For the 00z TAF package...Scattered showers and thunderstorms mainly north of I-40 will diminish between 00z-02z Thursday. Surface winds will generally remain light at 5-15 knots, except in the vicinity of thunderstorms. Patchy fog will possible after midnight tonight. Dry conditions are forecast for Thursday. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Scattered showers and thunderstorms across northern Arizona will diminish later this afternoon and evening. Dry conditions and relatively warmer temperatures are forecast for Thursday and Friday. Saturday through Monday...Dry conditions and a warming trend will continue through the weekend. Breezy southwesterly winds are forecast each afternoon Saturday through Monday. There will be a slight chance for thunderstorms in the White Mountains Monday afternoon. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC...TM AVIATION...TM FIRE WEATHER...TM For Northern Arizona weather information visit weather.gov/flagstaff
The Cedar City radar (KICX), 142 km away, was scanning. The volume nearest the first event began at 00:01 UTC.
1 flash flood. Local standard time, as filed.
Havasu Creek rose two feet in 15 minuets just above the Village of Supai.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2022Every state in 2022This day in weather historyWarnings in Arizona, September 2022
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: 1055665.