Thunderstorms produced heavy rain that lead to flash flooding in the Salina 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.
Thunderstorms produced heavy rain that lead to flash flooding in the Salina 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 Aug 18, 3:10 PM MST, 3 hours 40 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 310 PM MST WED AUG 18 2010 .SYNOPSIS...SCATTERED SHOWERS AND THUNDERSTORMS SHOULD CONTINUE THROUGH EARLY EVENING. SOME STORMS MAY PRODUCE HEAVY RAIN. ON THURSDAY AND FRIDAY...SLIGHTLY DRIER AIR WILL LOWER BUT NOT END THUNDERSTORM CHANCES. THUNDERSTORM ACTIVITY SHOULD INCREASE THIS WEEKEND THROUGH TUESDAY AS MOIST SOUTHERLY FLOW RETURNS. && .DISCUSSION... THUNDERSTORMS HAVE BEEN SLOW TO DEVELOP THIS AFTERNOON ACROSS NORTHERN ARIZONA. THE STORM COVERAGE AND INTENSITY IN NAVAJO AND APACHE COUNTIES IS LESS THAN EXPECTED. WE WILL CANCEL THE FLASH FLOOD WATCH FOR NAVAJO AND APACHE COUNTIES. SCATTERED THUNDERSTORMS SHOULD CONTINUE ACROSS THE NORTHLAND THROUGH EARLY EVENING BEFORE DIMINISHING. FOR THURSDAY THRU FRIDAY...LIGHT WESTERLY FLOW ALOFT IS FORECAST TO RETURN TO NORTHERN AZ. THIS WILL ALLOW FOR SOME DRYING...BUT NOT ENOUGH SHUT OFF DAYTIME THUNDERSTORM ACTIVITY. PW VALUES DROP TO NORMAL FOR THIS TIME OF YEAR. AFTERNOON CHANCES OF THUNDERSTORMS ARE RANGE FROM 10-20 PERCENT IN NW COCONINO COUNTY TO 40-50 PERCENT IN THE WHITE MTNS. FROM SATURDAY THROUGH EARLY NEXT WEEK. DEEP AND MOIST SOUTHERLY FLOW IS FORECAST TO RETURN TO AZ DURING THIS TIME PERIOD. VERY HIGH PRECIPITABLE WATER VALUES ARE SHOWN FOR THE NORTHLAND. WE HAVE CONTINUED THE ABOVE CLIMATOLOGY CHANCES FOR PRECIPITATION...AND EXPECT MORE CLOUDS THAN CLEAR FOR MUCH OF DAY 3 THROUGH 7 FORECAST PERIOD. && .AVIATION...FOR THE 00Z PACKAGE...EXPECT SCATTERED SHOWERS AND THUNDERSTORMS OVER MUCH OF NORTHERN ARIZONA THROUGH 02Z. STRONGER STORMS WILL BE CAPABLE OF HEAVY RAIN...SMALL HAIL...AND WIND GUSTS TO 35 KT. STORMS WILL DIMINISH AFTER 02Z WITH SCATTERED TO BROKEN CLOUD BASES 5 TO 10 KFT AGL. A SLIGHT CHANCE OF STORMS WILL CONTINUE OVERNIGHT. ANOTHER ROUND OF ISOLATED TO SCATTERED THUNDERSTORMS IS ANTICIPATED ON THURSDAY. DISCUSSION NOT UPDATED FOR AMENDMENTS. && && .FGZ WATCHES/WARNINGS/ADVISORIES... NONE. PUBLIC.................DL AVIATION...............MCCOLLUM VISIT WEATHER.GOV/FLAGSTAFF FOR NORTHERN ARIZONA WEATHER INFORMATION.
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 320 PM MST WED AUG 18 2010 AZZ004>018-037>040-190715- 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- 320 PM MST WED AUG 18 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL ARIZONA...NORTH CENTRAL ARIZONA...NORTHEAST ARIZONA AND WEST CENTRAL ARIZONA. .DAY ONE...TODAY AND TONIGHT TODAY FLASH FLOOD WATCH FOR NAVAJO AND APACHE COUNTIES HAS BEEN CANCELLED. SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE NORTHLAND THROUGH MID EVENING. STORM COVERAGE SHOULD DIMINISH BY LATE EVENING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY ON THURSDAY...SLIGHTLY DRIER AIR SHOULD BEGIN TO MAKE ITS WAY ACROSS NORTHERN ARIZONA...WITH PRECIPITATION CHANCES LOWERING BUT NOT ENDING THROUGH FRIDAY. THUNDERSTORM CHANCES AND THE THREAT OF LOCALLY HEAVY RAINFALL RETURN FROM SATURDAY THROUGH TUESDAY.
The Flagstaff radar (KFSX), 206 km away, was scanning. The volume nearest the first event began at 01:51 UTC.
1 flash flood. Local standard time, as filed.
Heavy rain and flooding made Route 4 impassable due to high water between mile marker 40 and 43.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2010Every state in 2010This day in weather historyWarnings in Arizona, August 2010
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: 258525.