A thunderstorm with very heavy rain produced flash flooding in northern Navajo County.
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 thunderstorm with very heavy rain produced flash flooding in northern Navajo 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 4, 10:12 AM MST, 4 hours 18 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1012 AM MST SAT JUL 4 2015 .SYNOPSIS...MONSOONAL MOISTURE WILL REMAIN IN PLACE ACROSS NORTHERN ARIZONA THROUGH TUESDAY. A DRYING TREND IS EXPECTED TO DEVELOP IN THE WESTERN ZONES STARTING WEDNESDAY. ..WHILE THE EASTERN ZONES REMAIN ACTIVE. && .UPDATE/DISCUSSION... GETTING AN EARLY START NEAR THE WHITE MOUNTAINS AS CONVECTION BEGAN DEVELOPING JUST AFTER 9 AM. FAIRLY LIGHT FLOW IN THE MORNING RAOB BELOW ABOUT 10 KM SO WE ARE SEEING SOME SLOW STORM MOTIONS AGAIN THIS MORNING. WE SHOULD SEE STORM MOTION PICK UP A LITTLE WITH TIME TODAY...ESPECIALLY IN WESTERN PORTIONS OF THE AREA. PRECIP CHANCES WERE UPDATED TO ADD TIME RESOLUTION THROUGH THIS EVENING. IT APPEARS THAT AREAS WEST OF I-17/US 89 MAY BE MOSTLY QUIET BY LATE THIS AFTERNOON. HRRR SHOWS OVERNIGHT ACTIVITY AGAIN FROM THE COCONINO PLATEAU/MOGOLLON RIM NORTHWARD. WILL HAVE TO KEEP AN EYE ON THIS. && .PREV DISCUSSION /330 AM MST SAT JUL 4/...AREA RADARS SHOW LIGHT SHOWER ACTIVITY ONGOING ACROSS PARTS OF COCONINO AND NAVAJO COUNTIES EARLY THIS MORNING. THERE IS MID AND HIGH LEVEL CLOUD COVER ACROSS MOST OF THE NORTHLAND AS WELL. FRIDAY NIGHTS PRECIP AND CLOUD COVER SHOULD DELAY THE START OF CONVECTION TODAY UNTIL LATE MORNING IN THE WHITE MTNS AND EARLY AFTERNOON ELSEWHERE. SEEING VERY LITTLE CHANGE IN MOISTURE AND INSTABILITY ACROSS NORTHERN ARIZONA THROUGH TUESDAY. WINDS ALOFT OVER NORTHERN AZ ARE EXPECTED TO BECOME LIGHT SOUTHERLY TODAY AND THEN LIGHT SOUTHWESTERLY SUNDAY AND MONDAY AS THE ANTICYCLONE CENTER MOVES TO CHIHUAHUA MEXICO. THUS MADE FEW CHANGES TO THE FORECAST FROM TODAY THROUGH TUESDAY AND WILL KEEP SHOWER AND TSTORM CHANCES GOING...WITH THE HIGHEST CHANCES IN THE AFTERNOON AND EVENINGS. MODELS ARE SHOWING DRIER AND STABLE AIRMASS WORKING INTO WESTERN AZ TUESDAY NIGHT /WEDNESDAY. AREAS WEST OF A PAGE TO PAYSON LINE SHOULD BE DRY WITH BREEZY SOUTHWEST WINDS FROM WEDNESDAY NIGHT THROUGH FRIDAY SHOULD CURRENT PROGS VERIFY. AREAS EAST OF THIS LINE STILL HANG ON TO SOME MONSOON MOISTURE...THOUGH NOT AS RICH AS WHAT WE HAVE OVERHEAD THIS WEEKEND. && .AVIATION...FOR THE 18Z PACKAGE...LIGHT SHOWERS NORTH OF A KCMR TO KSJN LINE WILL CONTINUE MOVING TO THE NORTHWEST THROUGH THE MORNING HOURS. SCATTERED SHRA/TSRA WILL REDEVELOP THIS AFTERNOON WITH LOCAL MVFR POSSIBLE IN THE STRONGER STORMS. AFTER 21-23Z...STORMS WILL FAVOR AREAS ALONG AND EAST OF A KFLG-KPAN LINE. THERE IS POTENTIAL FOR CONVECTIVE ACTIVITY TO CONTINUE THROUGH THE EVENING HRS...ESPECIALLY ACROSS EASTERN AZ. AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS. && .FIRE WEATHER...AN ACTIVE AND MOIST MONSOON PATTERN WILL BRING DAYTIME CONVECTIVE SHOWERS AND THUNDERSTORMS TO THE DISTRICT TODAY AND SUNDAY. CONVECTION WILL DIMINISH AT NIGHT...WITH DEBRIS CLOUD AND SCATTERED STRATIFORM SHOWERS. WINDS WILL BE LIGHT...WITH NORMAL TEMPERATURES. MONDAY THROUGH WEDNESDAY...LITTLE CHANGE IN THE WEATHER PATTERN IS ANTICIPATED THROUGH MONDAY. BY TUESDAY...DRIER AIR BEGINS MOVING IN FROM THE WEST. THIS WILL RESULT IN A DOWNWARD TREND IN SHOWERS AND THUNDERSTORMS...PARTICULARLY ACROSS WESTERN ARIZONA. SOUTHWEST WINDS WILL INCREASE...WITH FALLING RELATIVE HUMIDITIES. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC...AT/DL AVIATION...MCS FIRE WEATHER...PETERSON FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1141 AM MST SAT JUL 4 2015 AZZ014-041915- LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY- 1141 AM MST SAT JUL 4 2015 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL APACHE COUNTY UNTIL 1215 PM MST... AT 1140 AM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7 MILES SOUTHWEST OF HUNT...OR 27 MILES NORTHEAST OF SHOW LOW...MOVING NORTH AT 15 MPH. WINDS IN EXCESS OF 45 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... HUNT AND CONCHO. 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. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. && LAT...LON 3444 10963 3446 10984 3479 10984 3475 10952 TIME...MOT...LOC 1840Z 187DEG 12KT 3453 10973 AT
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1209 PM MST SAT JUL 4 2015 AZZ013-014-041945- LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY-LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY- 1209 PM MST SAT JUL 4 2015 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN NAVAJO AND WEST CENTRAL APACHE COUNTIES UNTIL 1245 PM MST... AT 1208 PM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 11 MILES NORTHWEST OF VERNON...OR 18 MILES NORTHEAST OF SHOW LOW... MOVING NORTHEAST AT 25 MPH. HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... CONCHO AND LITTLE ORTEGA LAKE. PRECAUTIONARY/PREPAREDNESS ACTIONS... FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. && LAT...LON 3429 10974 3438 10993 3464 10981 3450 10952 TIME...MOT...LOC 1908Z 210DEG 20KT 3440 10980 AT
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1235 PM MST SAT JUL 4 2015 AZZ008-037-042000- YAVAPAI COUNTY MOUNTAINS-YAVAPAI COUNTY VALLEYS AND BASINS- 1235 PM MST SAT JUL 4 2015 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL YAVAPAI COUNTY UNTIL 100 PM MST... AT 1232 PM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER OAK KNOLL VILLAGE...OR NEAR PRESCOTT...MOVING NORTH AT 5 MPH. HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... PRESCOTT...PRESCOTT VALLEY...PONDEROSA PARK...YAVAPAI COUNTY FAIRGROUNDS...WALKER...IRON SPRINGS...WILLIAMSON VALLEY..INDIAN HILL WEST PRESCOTT...YAVAPAI CAMPGROUND...PRESCOTT GATEWAY MALL...GROOM CREEK SUBDIVISION...OAK KNOLL VILLAGE...PRESCOTT AIRPORT...WHITE SPAR CAMPGROUND...LOWER WOLF CREEK CAMPGROUND AND LYNX LAKE DAM. PRECAUTIONARY/PREPAREDNESS ACTIONS... CLOUD TO GROUND LIGHTNING WILL LIKELY OCCUR WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. && LAT...LON 3444 11235 3444 11257 3474 11262 3473 11225 TIME...MOT...LOC 1932Z 179DEG 15KT 3452 11246 AT
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 212 PM MST SAT JUL 4 2015 AZZ013-014-016-017-042145- EASTERN MOGOLLON RIM-LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY-WHITE MOUNTAINS-LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY- 212 PM MST SAT JUL 4 2015 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN NAVAJO AND SOUTHWESTERN APACHE COUNTIES UNTIL 245 PM MST... AT 211 PM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER SNOWFLAKE...OR 18 MILES NORTH OF SHOW LOW...MOVING EAST AT 15 MPH. SMALL HAIL AND WIND GUSTS UP TO 55 MPH WILL BE POSSIBLE WITH THIS STORM...AS WELL AS VERY HEAVY RAINFALL AND CONTINUOUS LIGHTNING. LOCATIONS IMPACTED INCLUDE... SNOWFLAKE...TAYLOR...SHUMWAY AND WHITE MOUNTAIN LAKE. PRECAUTIONARY/PREPAREDNESS ACTIONS... TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. && LAT...LON 3443 11023 3460 11015 3454 10983 3429 10995 TIME...MOT...LOC 2111Z 291DEG 12KT 3449 11011 AT
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST SAT JUL 4 2015 AZZ012-015-042200- LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY-WESTERN MOGOLLON RIM- 230 PM MST SAT JUL 4 2015 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL COCONINO COUNTY UNTIL 300 PM MST... AT 229 PM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR WUPATKI NATIONAL MONUMENT...OR 23 MILES NORTHEAST OF FLAGSTAFF... MOVING NORTHEAST AT 25 MPH. NICKEL SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... WUPATKI NATIONAL MONUMENT AND WUPATKI VISITORS CENTER. THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. LAT...LON 3533 11136 3549 11146 3568 11112 3544 11094 TIME...MOT...LOC 2129Z 244DEG 22KT 3544 11134 AT
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
Heavy rain from a thunderstorm washed out three roads in spots between Chilchinbeto and Dennehotso.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2015Every state in 2015This day in weather historyWarnings in Arizona, July 2015
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: 596443.