A mid-level area of high shifted east and decreased in amplitude which opened the door for increased moisture, a classical medium to high end monsoonal pattern.
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.
A mid-level area of high shifted east and decreased in amplitude which opened the door for increased moisture, a classical medium to high end monsoonal pattern.
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 Jul 24, 9:40 AM MST, 4 hours 59 minutes earlier.
Area Forecast Discussion National Weather Service Flagstaff AZ 940 AM MST Sun Jul 24 2022 .SYNOPSIS...Monsoon moisture will continue to increase over the next several days, bringing higher chances for thunderstorms and an increased potential for flash flooding. && .DISCUSSION...A pattern featuring deep and layered southerly flow over Arizona, along with high PW values, will continue for the next few days, if not all week. There is strong potential for scattered to widespread, high-precipitation convection each day. There will be some issues with debris cloud cover and remnant MCS/MCC, which could hamper convection in places each day. It will be difficult to nail down which days are up or down, until these features show themselves. That being said, much of our CWA is starting today most sunny, with the exception of Yavapai County, which is currently being affected by a decaying MCS. Surface dewpoints are high, aided by outflows from the Phoenix area MCS and a continued Gulf of California surge. It should be an active day, with activity likely persisting into the late evening over western Coconino and Yavapai counties, There is potential for another MCS tonight and it could be partially in our CWA, will have to wait and see. Models indicate another active day on Monday, targeting the western and southwestern CWA pretty hard, once again. This will depend on debris cloud contamination, but we have very high PoPs for now. The remainder of the week is more of the same, streamlines do begin to shift toward the end of the week, as high pressure develops over the northwestern Great Basin. No updates this morning. && .AVIATION...For the 18Z TAF package...Numerous SHRA/TSRA with MVFR to IFR conditions over the next 24 hours. VFR conditions outside of storms, with light winds. Gusty and erratic winds are likely in and near storms. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Numerous showers and thunderstorm, with moderate to heavy rain possible through Monday, even at night. Light winds away from storms, with much cooler temperatures. Tuesday through Thursday...Expect numerous showers and thunderstorms each day across northern Arizona. Cooler temperatures continue. && .FGZ WATCHES/WARNINGS/ADVISORIES... Flood Watch from 1 PM MST this afternoon through late Tuesday night FOR AZZ008-017-018-037. && PUBLIC...Peterson AVIATION...BAJ FIRE WEATHER...MAS/BAJ For Northern Arizona weather information visit weather.gov/flagstaff
Special Weather Statement
National Weather Service Flagstaff AZ
145 PM MST Sun Jul 24 2022
AZZ013-242100-
Little Colorado River Valley in Navajo County-
145 PM MST Sun Jul 24 2022
...A strong thunderstorm will impact portions of Navajo County
through 200 PM MST...
At 144 PM MST, Doppler radar was tracking a strong thunderstorm 7
miles southwest of Woodruff moving north at 25 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...
Woodruff.
This includes the following highways...
State Route 277 between mile markers 327 and 331.
State Route 377 between mile markers 16 and 30.
State Route 77 between mile markers 364 and 383.
Highway 180 between mile markers 315 and 320.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3462 10990 3448 11024 3476 11041 3489 10995
TIME...MOT...LOC 2044Z 163DEG 20KT 3469 11012
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
ETThe Flagstaff radar (KFSX), 101 km away, was scanning. The volume nearest the first event began at 21:38 UTC.
5 flash flood. Local standard time, as filed.
Heavy rain caused flooding over State Route 77 and Feedmill Road.
The Little Colorado River rose over 8 feet from 300 to 500 PM MST (Woodruff guage WDRA3).
Heavy rain fill a wash with water four feet deep in Cameron.
Heavy rain caused flash flooding in Antelope Canyon which closed the popular slot canyon for at least a day.
Heavy rain caused water to flow bank to bank, two feet deep, moving very quickly.
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, July 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: 1047743, 1047744, 1047745, 1047746, 1047747.