A thunderstorm produced heavy rain in Prescott.
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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.
A thunderstorm produced heavy rain in Prescott.
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 5, 10:00 AM MST, 2 hours 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1000 AM MST SAT SEP 5 2009 .SYNOPSIS...PERIODS OF SHOWERS AND THUNDERSTORMS ARE FORECAST FOR ALL OF NORTHERN ARIZONA TODAY AS AN UPPER LEVEL DISTURBANCE MOVES ACROSS THE STATE. SOME OF THE STORMS MAY BECOME STRONG WITH HAIL AND LOCALIZED FLOODING. THE CHANCE OF THUNDERSTORMS WILL CONTINUE ON SUNDAY...AND THEN BEGIN TO DECREASE FROM NORTHWEST TO SOUTHEAST THROUGH THE WORK WEEK. && .DISCUSSION...A MID AND UPPER LEVEL TROUGH AXIS WAS LOCATED JUST WEST OF OUR AREA THIS MORNING...ACROSS SOUTHERN NEVADA INTO SOUTHWEST ARIZONA. AHEAD OF THE TROUGH...A DEEP MOISTURE PLUME WAS BEING DRAWN NORTHWARD ACROSS WESTERN AND CENTRAL ARIZONA. PRECIPITABLE WATER VALUES HAD RISEN TO NEAR ONE INCH ON THE MOGOLLON RIM...TO AROUND 1.5 INCHES OVER SOUTHERN YAVAPAI COUNTY. AS THE TROUGH MOVES SLOWLY EASTWARD...IT WILL CONTINUE TO INTERACT WITH THE DEEP MOISTURE PRODUCING NUMEROUS SHOWERS AND THUNDERSTORMS TODAY. FORECAST SOUNDINGS INDICATE A RATHER UNSTABLE ATMOSPHERE WILL DEVELOP IN AREAS THAT SEE SOME SUNSHINE THIS MORNING AND EARLY AFTERNOON. A FEW STRONG TO SEVERE STORMS MAY OCCUR WITH LARGE HAIL AND GUSTY WINDS. IN ADDITION...STORMS THAT DEVELOP TODAY WILL BE SLOW MOVING...AND CAPABLE OF VERY HEAVY RAINFALL AND FLOODING. WILL HIGHLIGHT THESE ISSUES WITH A FLASH FLOOD WATCH FOR MUCH OF CENTRAL AND NORTHERN ARIZONA UNTIL 9 PM TONIGHT. FROM SUNDAY THROUGH THE WORK WEEK...THE BOTTOM LINE IS WINDS ALOFT ARE FORECAST TO REMAIN LIGHT. MID LEVEL INSTABILITY AND LOW LEVEL MOISTURE ARE FORECAST TO HANG AROUND...ESPECIALLY ALONG AND SOUTH OF THE RIM. POP GRIDS WERE MASSAGED TO SHOW POP GRADIENT...WITH A CHANCE OF STORMS OVER THE WHITE MOUNTAINS AND JUST A SLIGHT CHANCE OVER THE KAIBAB PLATEAU. TEMPERATURES WILL SLOWLY REBOUND TO NEAR NORMAL LEVELS BY MONDAY OR TUESDAY. && .AVIATION...FOR THE 18Z PACKAGE...SCATTERED-NUMEROUS TSRA/SHRA EXPECTED OVER MUCH OF NORTHERN AZ TODAY. MOST CIGS WILL BE ABOVE 6K FT AGL...HOWEVER CIGS IN AND NEAR THE HEAVIER TSRA MAY DROP TO AROUND 3K FT AGL WITH VIS IN THE 3-5SM RANGE. IN ADDITION...BRIEF LOCALIZED WIND GUSTS UP TO 35 KT WILL BE POSSIBLE WITH THE STRONGER STORMS. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO REDEVELOP AGAIN TOMORROW AFT 18Z WITH NUMEROUS THUNDERSTORMS DEVELOPING OVER THE HIGHER TERRAIN OF THE MOGOLLON RIM AND SCATTERED THUNDERSTORM ACTIVITY ELSEWHERE. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FGZ WATCHES/WARNINGS/ADVISORIES...FLASH FLOOD WATCH UNTIL 9 PM MST FOR AZZ006>009-012-013-015-016-018-037-038-040. && PUBLIC..................JJ AVIATION/FIRE WEATHER...NP VISIT WEATHER.GOV/FLAGSTAFF FOR NORTHERN ARIZONA WEATHER INFORMATION.
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1111 AM MST SAT SEP 5 2009 AZZ004>018-037>040-060400- 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- 1111 AM MST SAT SEP 5 2009 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 A TROUGH MOVING INTO THE REGION FROM THE WEST WILL INTERACT WITH DEEP MOISTURE TO PRODUCE NUMEROUS THUNDERSTORMS THROUGH THIS EVENING. THESE STORMS WILL BE CAPABLE OF VERY HEAVY RAINFALL AND FLOODING. A FLASH FLOOD WATCH IS IN EFFECT FOR MUCH OF CENTRAL AND NORTHERN ARIZONA UNTIL 9 PM MST. IN ADDITION...A FEW STORMS MAY BECOME SEVERE...WITH LARGE HAIL AND GUSTY WINDS...MAINLY OVER YAVAPAI AND NORTHERN GILA COUNTIES. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY MOISTURE WILL LINGER OVER THE AREA SUNDAY WITH SCATTERED THUNDERSTORMS REDEVELOPING. LOCALIZED AREAS OF HEAVY RAINFALL WILL BE POSSIBLE. FOR NEXT WEEK...THE CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS WILL CONTINUE EACH DAY. THE BEST CHANCE WILL BE ALONG AND SOUTH OF THE MOGOLLON RIM. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. JJ
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
Heavy rain in Prescott caused street flooding. Highway 69 and Emerald Trail were closed due to high water.
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, September 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: 196368.