Deep monsoon moisture over northern Arizona brought thunderstorms with heavy rain.
Every event with a place to put it. Tap one for its entry below.
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.
Deep monsoon moisture over northern Arizona brought thunderstorms with 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 Aug 24, 9:13 AM MST, 3 hours 17 minutes earlier.
Area Forecast Discussion National Weather Service Flagstaff AZ 913 AM MST Wed Aug 24 2022 .SYNOPSIS...Increasing monsoonal moisture will bring greater storm coverage to northern Arizona for the remainder of the week. Flash flooding will be the main concern during this time. && .UPDATE...Left over clouds and instability from yesterday are moving across northern Arizona form east to west today. Radar is picking up a few very light echoes over the Mogollon north of Payson this morning. This mornings sounding from Flagstaff showed an increase in moisture (PW increased from 0.59 to 0.79) from yesterday. Satellite derived PW also shows around an an inch over southern Yavapai County, south of the Mogollon Rim and portions of southern Apache and Navajo counties. Current forecast shows a general increase of thunderstorms which is handled well by the current forecast. && .PREV DISCUSSION /248 AM MST/...High pressure is moving over the Four Corners area which will allow for moisture to move deeper across northern Arizona from the Gulf of California. Thunderstorm coverage will increase significantly from the last couple of days especially north of the Mogollon Rim. The greatest storm activity will be along and south of the I-40 with flash flooding and gusty outflow winds as the primary hazards. The increased chances for thunderstorm activity look to continue through the weekend before a dramatic downturn may take place beginning Monday. Until then, be aware of your surroundings and hike smart. Stay out of slot canyons, swimming holes and low water crossings. Turn around, don't drown! && AVIATION...For the 18Z TAF package...Scattered to numerous showers and thunderstorms will develop through this afternoon, with the greatest storm coverage along and south of a KCMR-KFLG-KINW-KRQE line. Expect gusty winds, and brief IFR visibilities, in the vicinity of the strongest storms with light winds expected elsewhere. Aviation discussion not updated for TAF amendments. && FIRE WEATHER...Storm coverage will increase by this afternoon as high pressure transitions towards the Four Corners. Outflow winds and flash flooding will continue to be the main threats. Similar conditions are expected Thursday with light winds outside of storm activity. Friday through Sunday...Expect good chances for thunderstorms each day with gusty and erratic winds in the vicinity of storms. Otherwise, little change in temperatures with mainly light winds are expected. && && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC...MAS/Kobold AVIATION...Meola FIRE WEATHER...Meola For Northern Arizona weather information visit weather.gov/flagstaff
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
835 AM MST WED AUG 24 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 PM FLASH FLOOD 1 SSW COTTONWOOD 34.72N 112.03W
08/23/2022 YAVAPAI AZ PUBLIC
ROAD FLOODED AT FIR ST AND MONTE TESORO
DRIVE. REPORT VIA FACEBOOK. WATER ESTIMATED
TO BE 1-2 FEET DEEP.
&&
ETPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
902 AM MST WED AUG 24 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0100 PM FLASH FLOOD 1 W PAULDEN 34.89N 112.48W
08/23/2022 YAVAPAI AZ COUNTY OFFICIAL
FLASH FLOOD REPORTED ON BIG CHINO WASH BY
YAVAPAI COUNTY FLOOD CONTROL DISTRICT. BCWA3
REPORTED A 4.64 FT RISE.
&&
ETSpecial Weather Statement
National Weather Service Flagstaff AZ
1229 PM MST Wed Aug 24 2022
AZZ015-038-242000-
Western Mogollon Rim-Oak Creek and Sycamore Canyons-
1229 PM MST Wed Aug 24 2022
...A strong thunderstorm will impact portions of Coconino County
through 100 PM MST...
At 1228 PM MST, Doppler radar was tracking a strong thunderstorm over
Mountainaire, or 8 miles south of Flagstaff, moving northwest at 5
mph.
HAZARD...Winds in excess of 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Flagstaff, Mountainaire, Kachina Village, Cave Springs Campground,
Pine Flat Campground, Sterling Fish Hatchery, West Fork Of Oak Creek,
Lower Lake Mary and Canyon Vista Campground.
This includes the following highways...
Route 66 between mile markers 192 and 195.
Interstate 40 between mile markers 188 and 197.
Interstate 17 between mile markers 326 and 339.
State Route 89A between mile markers 385 and 398.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3513 11154 3497 11163 3501 11189 3526 11176
TIME...MOT...LOC 1928Z 112DEG 5KT 3508 11167
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
ETThe Flagstaff radar (KFSX), 91 km away, was scanning. The volume nearest the first event began at 19:29 UTC.
4 flash flood. Local standard time, as filed.
Heavy rain over the Schultz Fire scar (2010) and the Pipeline/Tunnel (2022) Fire scar caused flash flooding over Alice Drive. The water, mud, and many basketball sized rocks made Alice Drive impassable.
Heavy rain over the Pipeline Fire scar (June 2021) caused flash flooding in Schultz Creek. The creek rose 4.84 feet at Highway 180. The water flooded apartments, homes, and streets on the west side of Highway 180.
Water flooded roads 5 miles east of K'ai'bii'to.
Granite Creek in Prescott rose about three feet.
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, August 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: 1055329, 1055332, 1055330, 1055333.