Thunderstorms produced heavy rain in central Yavapai County.
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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.
Thunderstorms produced heavy rain in central Yavapai County.
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 9, 9:53 AM MST, 4 hours 47 minutes earlier.
Area Forecast Discussion National Weather Service Flagstaff AZ 953 AM MST Sun Jul 9 2017 .SYNOPSIS...The daily monsoon pattern of afternoon and evening showers and thunderstorms will continue through the weekend and into next week. Temperatures will return to normal levels, with higher relative humidity values. && .UPDATE... No significant chances to the forecast this morning. Have updated pops and wx as confidence contiues to grow over widespread showers and thunderstorms this afternoon and evening. Latest upper air sounding shows an increase in precipitable water from yesterday morning up to 0.84 from 0.75. This is due to moisture in the lower parts of the atmosphere, which should decrease the potential for damaging winds ever so slightly. A thin cape profile above the lifted condensation level at roughly the same height as yesteredays sounding (roughly 540 mbar) suggests that high based storms will have limited potential for large hail, however slow moving steering flow should generally push storms towards the west northwest today at or arround 10 to 15 mph. Once again the main threats look to be strong outflow winds and flash flooding, with a lesser chance of damaging hail. Most storms are expected to diminish around sunset as thermal mixing shuts off. && .PREV DISCUSSION /318 AM MST/...A well developed monsoonal circulation is in place across the southwest. High pressure has moved very little in the past few days and remains centered just west of the four corners, where it will remain into the coming week. The high pressure ridge will flatten and gradually shift east through the week but no major pattern changes are anticipated as we remain in a favorable monsoon pattern. Instability from daytime heating will drive thunderstorm development again this afternoon. Storms are expected to develop first along the rim country and White Mountains, and will spread into the lower elevations this evening. Steering flow is weak leading to slow moving storms with propagation driven more by outflow boundaries. Storms have been producing more rainfall each day with a few storms measuring near 1" of rain south of the rim on Saturday. This trend will continue today with localized areas seeing 0.75" to 1.00"+ of rainfall. Gusty winds up to 50 mph and small hail will also be possible today. Some of the hi-resolution model guidance suggests showers and storms continuing into the nighttime hours so we have trended upward keeping scattered showers/storms in the forecast through the overnight hours. A typical monsoon pattern will continue through the coming week with daily showers and thunderstorms and near normal temperatures. We may see a slight shift east of the monsoonal moisture plume by the mid to latter part of next week. && .AVIATION...For the 18Z package...Expect scattered to numerous SHRA/TSRA with isolated +TSRA developing later this morning and afternoon. Strongest storms may produce wind gusts over 40 kts and brief MVFR/IFR visibilities. Storm intensity and coverage will gradually diminish after 02Z. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Cooler temperatures and increased low level moisture are expected early this week, though gusty and erratic outflow winds should still be anticipated. The cooler temperatures and increased moisture will result in higher minimum relative humidity values and higher chances of wetting rains. Tuesday through Thursday...The district will be in a medium grade monsoon pattern during this time. Expect scattered to numerous showers and thunderstorms each day. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC...Suk/MCT AVIATION...KD FIRE WEATHER...TPS For Northern Arizona weather information visit weather.gov/flagstaff
Hazardous Weather Outlook National Weather Service Flagstaff AZ 324 AM MST Sun Jul 9 2017 AZZ004>018-037>040-100700- Kaibab Plateau-Marble and Glen Canyons-Grand Canyon Country- Coconino Plateau-Yavapai County Mountains- Northeast Plateaus and Mesas Hwy 264 Northward-Chinle Valley- Chuska Mountains and Defiance Plateau- Little Colorado River Valley in Coconino County- Little Colorado River Valley in Navajo County- Little Colorado River Valley in Apache County- Western Mogollon Rim-Eastern Mogollon Rim-White Mountains- Northern Gila County-Yavapai County Valleys and Basins- Oak Creek and Sycamore Canyons-Black Mesa Area- Northeast Plateaus and Mesas South of Hwy 264- 324 AM MST Sun Jul 9 2017 This hazardous weather outlook is for Apache...Coconino... Northern Gila...Navajo...and Yavapai Counties in Northern Arizona. .DAY ONE...Today and Tonight Scattered to numerous showers and thunderstorms will develop today and last through this evening, and perhaps even into the overnight hours. Storms will produce moderate rainfall and gusty outflow winds up to 40-50 MPH. Localized areas may see heavy rainfall exceeding 1.00". Small hail is also possible. .DAYS TWO THROUGH SEVEN...Monday through Saturday Expect a typical monsoon pattern with scattered thunderstorms developing each day. Thunderstorm hazards will include lightning, moderate rainfall, and small hail. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated at this time.
The national radar mosaic for the moment the first event began.
3 heavy rain. Local standard time, as filed.
More than an inch of rain fell in 25 minutes at the Prescott Courthouse.
Thunderstorms produced 0.93 inches of rain from 1600 to 1830. The maximum rainfall rate was 3.6 inches an hour.
A thunderstorm produced half to three-quarters of an inch of rain in 15 minutes, minor street flooding, peak sized hail, and 50 MPH wind gusts. Small (less than two inches in diameter) tree branches were blown down. Brawshaw Middle School reported 1.20 inches of rain.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2017Every state in 2017This day in weather historyWarnings in Arizona, July 2017
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: 708128, 708326, 708515.