Deep moisture over Arizona allowed thunderstorms with heavy rain to form over parts of the area.
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 moisture over Arizona allowed thunderstorms with heavy rain to form over parts of the area.
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 13, 2:52 PM MST, 8 minutes earlier.
Area Forecast Discussion National Weather Service Flagstaff AZ 252 PM MST Fri Jul 13 2018 .SYNOPSIS...The monsoon weather pattern will persist over Arizona through next week, with daily rounds of showers and thunderstorms. The main threat with storms from today through the weekend will be heavy rainfall and localized flooding. && .DISCUSSION...Storms early this afternoon have been slow moving. Fortunately, the lack of vertical shear has also inhibited storm organization thus far, with most cells producing heavy precipitation for a fairly short time before decreasing in intensity. Storms into central/eastern Yavapai County are persisting a little longer and producing larger areas of heavy rain. Expect this trend to continue through the afternoon into early evening, with the majority of storms remaining over/near higher terrain features due to the light steering flow. Hi-res convection allowing models still are fairly consistent in forecasting a cluster of storms moving off the high terrain in western NM through portions of the Little Colorado River valley and the eastern Mogollon Rim this evening. We will maintain elevated precip chances in these areas. Ensemble forecasts show precipitable water values increasing slightly into this weekend, then remaining fairly steady through the early part of next week before perhaps decreasing slightly later next week. At any rate, it is expected that there will be plenty of available moisture for showers and thunderstorms throughout next week. && .AVIATION...For the 00Z package...Expect slow moving showers and thunderstorms with MVFR/IFR conditions during the late afternoon and evening. Generally VFR conditions to persist outside of any storms. Storms anticipated to decrease in overall coverage and intensity after 03Z Saturday, before ramping up again after 17Z Saturday. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Deep moisture will remain over northern Arizona for the next several days. Expect scattered to numerous showers and thunderstorms through the forecast period, especially during the daylight hours. Winds will generally be light, though gusty winds may develop near storms. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC...AT AVIATION...KD FIRE WEATHER...KD For Northern Arizona weather information visit weather.gov/flagstaff
Special Weather Statement National Weather Service Flagstaff AZ 1152 AM MST FRI JUL 13 2018 AZZ011-131930- Chuska Mountains and Defiance Plateau- 1152 AM MST FRI JUL 13 2018 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTH OF WINDOW ROCK NEAR ROUTE 12 UNTIL 1230 PM MST... At 1149 AM MST, Doppler radar was tracking a strong thunderstorm 7 miles north of Oak Springs Valley, or 7 miles southwest of Window Rock. This storm was nearly stationary. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Oak Springs Valley. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3547 10933 3565 10924 3563 10904 3543 10905 TIME...MOT...LOC 1849Z 009DEG 2KT 3558 10915
Special Weather Statement National Weather Service Flagstaff AZ 1155 AM MST FRI JUL 13 2018 AZZ015-131945- Western Mogollon Rim- 1155 AM MST FRI JUL 13 2018 ...SIGNIFICANT WEATHER ADVISORY FOR COCONINO COUNTY UNTIL 1245 PM MST... At 1154 AM MST, Doppler radar was tracking a strong thunderstorm near Fort Valley, or 9 miles northwest of Flagstaff. This storm was nearly stationary. Half inch hail will be possible with this storm. Locations impacted include... Fort Valley and Arizona Snowbowl. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3536 11178 3534 11160 3524 11162 3526 11181 TIME...MOT...LOC 1854Z 011DEG 1KT 3531 11172
Special Weather Statement National Weather Service Flagstaff AZ 234 PM MST FRI JUL 13 2018 AZZ008-037-132215- Yavapai County Valleys and Basins-Yavapai County Mountains- 234 PM MST FRI JUL 13 2018 ...SIGNIFICANT WEATHER ADVISORY FOR JEROME IN YAVAPAI COUNTY UNTIL 315 PM MST... At 234 PM MST, Doppler radar was tracking a strong thunderstorm near Jerome , or 18 miles northwest of Camp Verde. This storm was nearly stationary. Nickel size hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Jerome, Potato Patch Campground, Mingus Mountain Campground and Playground Group Campground. LAT...LON 3473 11219 3478 11210 3474 11205 3467 11212 TIME...MOT...LOC 2134Z 311DEG 3KT 3473 11211
The Flagstaff radar (KFSX), 124 km away, was scanning. The volume nearest the first event began at 21:58 UTC.
2 flash flood, 1 heavy rain. Local standard time, as filed.
Cedar Creek had a 5 foot rise below the Cedar Fire scar after a thunderstorm dropped heavy rain over the area. The water was receding by 329 PM.
Heavy rain fell over the Goodwin Fire scar east of Mayers. This resulted in flash flooding in Mayers and East Central Avenue was closed.
Heavy rain over Interstate 40 between Sanders and Lupton caused up to one foot of water to accumulate on the road (between mile markers 354 and 359). Initial reports indicated that several cars were stopped along the highway. However, DPS only saw one car stopped when they arrived and the water had receded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2018Every state in 2018This day in weather historyWarnings in Arizona, July 2018
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: 774936, 774937, 774941.