Deep monsoon moisture remained over northern Arizona with thunderstorms, heavy rain, and flash flooding.
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 remained over northern Arizona with thunderstorms, heavy rain, and flash flooding.
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 29, 9:51 AM MST, 3 hours 29 minutes earlier.
Area Forecast Discussion National Weather Service Flagstaff AZ 951 AM MST Fri Jul 29 2022 .SYNOPSIS...An active monsoon pattern will continue with widespread showers and thunderstorms expected. Flash flooding will remain the main threat during this time. && .UPDATE...Some showers and thunderstorms are starting to develop across northeastern Arizona this morning. Motion of these storms is towards the north-northeast and they are moving pretty quickly so do not anticipate much coming from them other than a quick burst of rain and some gusty winds. As we head into this afternoon, expect the radar to fill in a bit more and with the ripe conditions in place due to atmospheric moisture and wet antecedent conditions, another day of potential flash flooding is expected. Made some updates to the PoPs to better reflect current radar and trends. Otherwise, the forecast looks good and on track. && .PREV DISCUSSION /244 AM MST/...Isolated showers and thunderstorms continue this morning. Over western Navajo County, Coconino and Yavapai Counties: most seem to be rotating around Mesoscale Convective Vortices - remnants of strong storms that happened over the past few days. This is similar to what we've seen with storm activity the past two mornings. Across Gila, southern Navajo and Apache Counties: we're seeing storms ahead of a complex in southeastern Arizona this morning. The Flash Flood threat continues for your morning commute. Turn around, don't drown! High Precipitable Water content continues across northern Arizona with values above 1". This is due to the placement of high pressure currently residing over the Pacific Northwest allowing for moisture to advect across our region from the Gulf of California. This will continue the Flash Flood threat especially with the flooding we have seen thus far creating saturated soils that are unable to absorb additional rainfall. The Flash Flood Watch continues through early Saturday morning for all of northern Arizona. Avoid slot canyons and swimming holes, have a way to get to higher ground and have more than one way to receive warnings. Do not drive into flood waters! Beginning Sunday, the high looks to shift to our north and into the Plains. This should tamper down some of the moisture propagating into the region with some chances that we might return to more normal looking monsoon day(s)- clear at night and in the morning with thunderstorm activity in the late morning to early evening. However, since models are showing differing solutions related to the position of that high, we will have to see if the deluge continues. && AVIATION...For the 18Z TAF package...Widespread showers and thunderstorms. VFR conditions with light winds except for MVFR/IFR and gusty, erratic winds near and in storms. Storm coverage will decrease after 06Z. Aviation discussion not updated for TAF amendments. && FIRE WEATHER...Widespread thunderstorms today with flash flooding the main threat. Storm chances and coverage will decrease overnight. Scattered to numerous storms Saturday. Light winds, seasonally cool temperatures, and humid both days with gusty, erratic winds in and near storms. Sunday through Tuesday...Daily thunderstorms will continue through Tuesday, with a slight decline in storm coverage each day. Flash flooding will continue to be the major threat. && .FGZ WATCHES/WARNINGS/ADVISORIES... Flood Watch through late tonight for AZZ004>018-037>040-104>118- 137>140. && PUBLIC...Meola/Kobold AVIATION...MAS FIRE WEATHER...MAS For Northern Arizona weather information visit weather.gov/flagstaff
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
838 AM MST FRI JUL 29 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0915 PM FLASH FLOOD 2 E CHINLE 36.15N 109.55W
07/26/2022 APACHE AZ EMERGENCY MNGR
A FEW PEOPLE WERE EVACUATED FROM A HOME THAT
FLOODED IN EASTERN CHINLE NEAR CANYON DE
CHELLY/CHINLE WASH. TIME ESTIMATED FROM
RADAR.
&&
TMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1010 AM MST FRI JUL 29 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0925 PM FLASH FLOOD 1 ENE STEAMBOAT CANYON 35.75N 109.84W
07/27/2022 APACHE AZ EMERGENCY MNGR
FLOODING IN RURAL STEAMBOAT CANYON AZ. PHOTO
EVIDENCE OF WATER/MUD WASHING OUT A
RESIDENTIAL ROAD. TIME OF EVENT ESTIMATED
FROM RADAR.
&&
TMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1054 AM MST FRI JUL 29 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 PM FLASH FLOOD 3 SSE HARDROCK 36.08N 110.44W
07/28/2022 NAVAJO AZ PUBLIC
PHOTO EVIDENCE OF WHITE VALLEY ROAD - N8031
COMPLETELY WASHED OUT. NOT SURE THE EXACT
TIME THE ROAD WASHED OUT, SO THE TIME STAMP
IS THE TIME OF THE REPORT.
&&
TMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1109 AM MST FRI JUL 29 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0150 PM FLASH FLOOD K'AI'BII'TO 36.61N 111.07W
07/27/2022 COCONINO AZ PUBLIC
PHOTO EVIDENCE OF WASHED OUT ROADS IN THE
AREA. TIME IS ESTIMATED.
&&
TMThe Flagstaff radar (KFSX), 189 km away, was scanning. The volume nearest the first event began at 20:17 UTC.
4 flash flood. Local standard time, as filed.
Six feet of water was flowing through Burnt Corn Wash.
Heavy rain over the Pipeline/Tunnel (2022) and Schultz Fire (2010) scars caused extensive flash flooding northwest through northeast of Flagstaff. Highway 89 northeast of Flagstaff was closed in both directions around mile post 425 around 442 PM MST. The following roads in far northeast Flagstaff were flooded: Copeland Lane, Gunman Road, Vista de Oro, Pioneer Valley Road, and Neptune Drive. Highway 180 northwest of Flagstaff was closed in both directions around MP 218 at 419 PM. The Stevanna Way and Coconino Estates neighborhoods on the northwest side of Flagstaff flooded with apartments, homes, and streets impacted.
A video of flash flooding three miles north of Fort Defiance was posted on social media.
Heavy rain caused flash flooding in Antelope Canyon. The popular tourist slot canyon was closed for at least a day so that the water could be removed and sand could be replaced.
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: 1049727, 1049740, 1050114, 1050112.