A deep moist southerly flow fueled thunderstorms that produced heavy rain over the Yarnell Hill Fire scar. This triggered flash flooding in the town of Yarnell.
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 deep moist southerly flow fueled thunderstorms that produced heavy rain over the Yarnell Hill Fire scar. This triggered flash flooding in the town of Yarnell.
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 Sep 10, 4:19 AM MST, 4 hours 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 410 AM MST TUE SEP 10 13 .SYNOPSIS...THE WET MONSOON WEATHER PATTERN WILL CONTINUE THROUGH WEDNESDAY WITH SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS. LOCALLY HEAVY RAINFALL IS EXPECTED TODAY ACROSS WESTERN ARIZONA AND A FLASH FLOOD WATCH IS IN EFFECT. SHARPLY LOWER CHANCES FOR SHOWERS AND THUNDERSTORMS ARE FORECAST FROM THURSDAY ONWARD AS DRIER AIR MOVES IN FROM THE WEST. && .DISCUSSION... FOR TODAY AND TONIGHT...RADAR AND AT IMAGERY THIS MORNING SHOW SCATTERED SHOWERS EAST OF I-17 AND HIGHWAY 89 DUE TO THE NORTHWARD MOVEMENT OF A SHORTWAVE. THE LARGER SCALE UPPER LOW IS SITTING OVER NW ARIZONA. WIDESPREAD PRECIP ACROSS MOHAVE COUNTY NOW IS ON THE BACKSIDE OF THE LOW. AREAS OF FOG EXIST...ESPECIALLY ALONG AND NORTH OF THE MOGOLLON RIM AND SHOULD COME AND GO THROUGH MID MORNING. PROGS HOLD THE UPPER LOW OVER NW ARIZONA THROUGH TONIGHT. A FLASH FLOOD WATCH IS IN EFFECT FOR AREAS WEST OF A LINE FROM KAYENTA TO HOLBROOK THRU SHOW LOW GIVEN THE RAINFALL OVER THE LAST TWO DAYS AND TODAYS EXPECTED PRECIP AMOUNTS. PROGS ARE BRINGING IN DRIER AIR THIS AFTERNOON TO EASTERN AZ BEHIND THE WAVE THAT IS CURRENTLY MOVING THROUGH. EXPECT ANOTHER ACTIVE DAY WITH WIDESPREAD SHOWERS AND THUNDERSTORMS...BUT THE GREATEST RAINFALL SHOULD OCCUR ACROSS WESTERN AZ THROUGH THIS EVENING. WEDNESDAY...PROGS CONTINUE TO SHOW THE UPPER LEVEL LOW WILL MOVE INTO UTAH AND ALLOW DRIER AIR TO SLOWLY INVADE WESTERN ARIZONA. ENOUGH MOISTURE AND INSTABILITY WILL LINGER FOR ANOTHER ROUND OF SHOWER AND STORM ACTIVITY THROUGH THE EVENING. THURSDAY THROUGH MONDAY... PROGS ARE MOVING THE UPPER LOW CIRCULATION AWAY FROM AZ BUT KEEP A WEAK CYCLONIC FLOW OVER THE AREA THROUGH FRIDAY NIGHT. DEEP NORTHWEST TO WEST FLOW ALOFT THEN MOVES FOR THE WEEKEND AND PUSHES ANY REMAINING MOISTURE TO THE NEW MEXICO LINE. AT THIS TIME WE EXPECT SCATTERED DAYTIME STORMS ALONG AND NORTH OF THE RIM THURSDAY AND FRIDAY AND THEN JUST A SLIGHT CHANCE OF STORM FOR EASTERN AZ FOR THE WEEKEND. && .AVIATION....FOR THE 12Z PACKAGE...EXPECT AREAS OF LOW CLOUDS AND FOG FROM THE MOGOLLON RIM NORTHWARD THIS MORNING PRODUCING INTERMITTENT MVFR/IFR CONDITIONS. SCT SHRA/TSRA WILL AFFECT NORTHERN AZ EAST OF A LINE FROM KOV7 TO KPAN...ISOLD SHRA/TSRA TO THE WEST OF THE LINE UNTIL 15Z. INCREASING SHRA/TSRA COVERAGE EXPECTED FROM 15Z-18Z...SHRA/TSRA WILL BECOME NUMEROUS. MVFR CIGS/VSBYS WILL ASSOCIATED WITH THE SHRA/TSRA ACTIVITY. HEAVIER SHOWERS AND THUNDERSTORMS WILL PRODUCE ISOLD IFR CEILINGS AND VISIBILITIES. SHRA/TSRA DECREASING TO SCT ACTIVITY OVERNIGHT...HOWEVER BREAKS IN THE CLOUD COVER WILL ALLOW AREAS OF LOW CLOUDS AND FOG TO DEVELOP AND LINGER THROUGH DAY BREAK. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FGZ WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH TODAY 11 AM MST THROUGH 11 PM MST AZ ZONES 004>009-012-013-015-016-018-037>040. && PUBLIC.....DL AVIATION...TEC FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 330 AM MST TUE SEP 10 2013 AZZ004>018-037>040-110700- 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- 330 AM MST TUE SEP 10 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO... NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY AND TONIGHT A FLASH FLOOD WATCH IS IN EFFECT TODAY FROM 11 AM THROUGH 11 PM MST FOR AREAS WEST OF A LINE FROM KAYENTA TO HOLBROOK THROUGH SHOW LOW. NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED AGAIN TODAY AND AND SOME STORMS MAY PRODUCE HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED WEDNESDAY. LOOK FOR DECREASING MOISTURE AND PRECIPITATION COVERAGE ACROSS WESTERN ARIZONA STARTING THURSDAY. MONSOON MOISTURE WILL BE PUSHED SLOWLY EASTWARD WITH TIME THROUGH THE END OF THE WEEK. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Phoenix radar (KIWA), 145 km away, was scanning. The volume nearest the first event began at 15:29 UTC.
1 flash flood. Local standard time, as filed.
Heavy rain over the Yarnell Hill Fire scar produced flash flooding in the town of Yarnell. Water was flowing over the roads near the junction of Willow and Stahl.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2013Every state in 2013This day in weather historyWarnings in Arizona, September 2013
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: 479365.