Heavy rain from a thunderstorm caused flash flooding south of Leupp.
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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.
Heavy rain from a thunderstorm caused flash flooding south of Leupp.
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 May 22, 3:08 PM MST, 3 hours 7 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 308 PM MST FRI MAY 22 2009 .SYNOPSIS...AN AREA OF LOW PRESSURE WILL PRODUCE SHOWERS AND THUNDERSTORMS...ALONG WITH COOL TEMPERATURES...FOR THE NEXT SEVERAL DAYS ACROSS NORTHERN ARIZONA. A GRADUAL DRYING AND WARMING TREND IS EXPECTED MEMORIAL DAY THROUGH NEXT WEEK. HOWEVER...LIMITED MOISTURE AND A SLIGHT CHANCE OF PRECIPITATION WILL REMAIN THROUGH FRIDAY. && .DISCUSSION...SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS CONTINUE OVER NORTHERN ARIZONA THIS AFTERNOON WITH LOCALLY HEAVY RAIN. THE HEAVIEST RAINFALL RATES HAVE APPROACHED AN INCH AN HOUR. WV IMAGERY SHOWED THE LOW PRESSURE AREA OVER NORTHERN SONORA AND SOUTHERN ARIZONA THIS AFTERNOON. THE CIRCULATION AROUND THE LOW CREATED A NORTHERNLY MOVEMENT OF THE STORMS EAST OF FLAGSTAFF WHILE STORMS OVER YAVAPAI COUNTY SHOWED VERY LITTLE MOVEMENT. THE LOW IS FORECAST TO MOVE NORTH AND EAST OF ARIZONA BY SUNDAY AFTERNOON. THIS WILL SLOWLY SHIFT THE MOISTURE EASTWARD AND WILL BRING A DOWNWARD TREND IN CONVECTIVE ACTIVITY SUNDAY EVENING AND WILL CONTINUE INTO MIDWEEK. DAYTIME TEMPERATURES WILL BE ABOUT 8 TO 10 DEGREES BELOW AVERAGE ON SATURDAY. TEMPERATURES WILL WARM ABOUT 4 TO 6 DEGREES ON SATURDAY...AND THEN RETURN TO SEASONABLE READINGS BY MID WEEK. HOLIDAY TRAVELERS TO THE HIGH COUNTRY SHOULD BE PREPARED FOR COOL TEMPERATURES...RAINY CONDITIONS...AND MUDDY FOREST SERVICE ROADS FOR THE NEXT FEW DAYS. && .AVIATION...FOR THE 00Z PACKAGE...BKN-OVC CLOUD COVER WITH BASES AT OR ABOVE 10 KFT MSL WILL CONTINUE OVER NORTHERN ARIZONA FOR THE NEXT 12 HOURS. SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH THE DAY WITH AREAS OF MVFR AND ISOLATED IFR CIGS AND VSBYS OVER NORTHERN ARIZONA THROUGH 07Z SAT. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FIRE WEATHER...FOR TONIGHT...AN UPPER LEVEL LOW PRESSURE SYSTEM CENTERED OVER SOUTHEAST ARIZONA WILL KEEP DEEP MOISTURE OVER OUR STATE. SHOWERS AND THUNDERSTORMS WITH WETTING RAINS ARE EXPECTED TO CONTINUE THROUGH MIDNIGHT TONIGHT. ON SATURDAY AND SUNDAY...THE UPPER LOW SHOULD BEGIN MOVING SLOWLY EASTWARD. MOISTURE WILL LINGER OVER THE NORTHLAND WITH SCATTERED SHOWERS AND THUNDERSTORMS CONTINUING. MONDAY THROUGH WEDNESDAY...THE WEAK AREA OF LOW PRESSURE WILL BE EAST OF ARIZONA....WITH A DRYING WESTERLY FLOW ALOFT. ENOUGH MID LEVEL MOISTURE WILL LINGER FOR A CHANCE OF AFTERNOON SHOWERS AND THUNDERSTORMS. MINIMUM RELATIVE HUMIDITIES SHOULD FALL TO THE 15-25 PERCENT RANGE THROUGH THE PERIOD...WITH SOUTH TO SOUTHWEST WINDS OF 10 TO 15 MPH IN THE AFTERNOON. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC.....................MAS AVIATION/FIRE WEATHER......JVC VISIT WEATHER.GOV/FLAGSTAFF FOR NORTHERN ARIZONA WEATHER INFORMATION.
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 335 PM MST FRI MAY 22 2009 AZZ004>018-037>040-231300- 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- 335 PM MST FRI MAY 22 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL ARIZONA...NORTH CENTRAL ARIZONA...NORTHEAST ARIZONA AND WEST CENTRAL ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE DEVELOP THIS AFTERNOON. STORMS WILL BE MOST COMMON ALONG AND NORTH OF THE MOGOLLON RIM. SOME STORMS WILL CONTAIN HEAVY RAIN AND MAY CAUSE LOCAL FLOODING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY A MOIST AND UNSTABLE WEATHER SYSTEM WILL CONTINUE OVER ARIZONA THROUGH MEMORIAL DAY. EXPECT SCATTERED TO WIDESPREAD SHOWERS AND THUNDERSTORMS EACH DAY...SOME STORMS WILL CONTAIN HEAVY RAIN...AND MAINLY SMALL HAIL. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
339 PM MST FRI MAY 22 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0930 AM FLASH FLOOD PAGE 36.90N 111.46W
05/22/2009 COCONINO AZ LAW ENFORCEMENT
ADDITIONAL HEAVY RAIN FALLING BETWEEN 900 AND 1000 AM MST
CAUSED SIGNIFICANT FLOODING IN AND AROUND THE CITY OF
PAGE. SEVERAL ROADS TEMPORARY CLOSED...WITH STREET
FLOODING IN MUCH OF THE CITY.
&&
BAKThe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Flash flooding from heavy rain covered parts of Highway 99 between 6 and 11 miles south of Leupp.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2009Every state in 2009This day in weather historyWarnings in Arizona, May 2009
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: 170393.