A thunderstorm produced very heavy rain in Fort Valley Estates.
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The episode as NWS FGZ wrote it up.
A thunderstorm produced very heavy rain in Fort Valley Estates.
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 3, 8:15 PM MST, 16 hours 25 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 815 PM MST MON AUG 3 2008 .SYNOPSIS...EXPECT INCREASED CHANCES FOR AFTERNOON AND EVENING THUNDERSTORMS THROUGH THE WORK WEEK WITH DAYTIME TEMPERATURES HOVERING NEAR AVERAGE FOR THIS TIME OF YEAR AS A MOIST AIRMASS CONTINUES TO SIT OVER NORTHERN ARIZONA. && .DISCUSSION...ANOTHER DAY OF SCATTERED SHOWERS AND THUNDERSTORMS FREQUENTED NORTHERN ARIZONA TODAY. FROM A LOOK AT THE STORM TOTAL PRECIPITATION PRODUCT...MOST OF THE RAIN FALL OVER WESTERN COCONINO COUNTY WITH SOME LIGHTER AMOUNTS SEEN MORE TO THE SOUTH OVER NORTHERN GILA COUNTY. ONE FLASH FLOOD WARNING WAS ISSUED EARLIER FOR THE LANE 2 BURN AREA...BUT OTHERWISE PRETTY QUIET. SURFACE DEWPOINTS ARE GENERALLY IN THE 50S ACROSS ALL SITES THIS EVENING AS A MOIST AIR MASS SITS ATOP THE STATE. THIS EVENINGS SOUNDING CHECKS IN AT ALMOST AN INCH OF PRECIPITABLE WATER. SATELLITE IMAGERY SHOWS MAINLY MOSTLY CLOUDY SKIES OVER THE NORTHLAND WITH SOME CLEARING OVER PHOENIXS AND TUCSONS COUNTY WARNING AREA. HAVE UPDATED POP AND ASSOCIATED GRIDS EARLIER THIS EVENING TO REFLECT HIGHER CONVECTIVE ACTIVITY OVER THE WESTERN PORTIONS OF THE FORECAST AREA...AS WELL AS FOR THE LITTLE COLORADO RIVER VALLEY NORTH TO WINDOW ROCK. LOOKS LIKE THE ACTIVITY OVER THE LCR IS STARTING TO WEAKEN A BIT PER LATEST RADAR TRENDS...BUT WILL KEEP AN EYE ON IT AND UPDATE FURTHER IF NECESSARY. .PREVIOUS DISCUSSION (230 PM MST)...CONVECTION BEGAN OVER HIGHER TERRAIN LEFT CLOUD-FREE EARLIER TODAY. AT THIS POINT...NONE OF THE STORMS HAS BEEN SEVERE...THOUGH THEY ARE PRODUCING APPRECIABLE RAINFALL /AS MUCH AS 1.3 INCHES STORM TOTAL PRECIPITATION/. AT 500 MB...A RIDGE OF HIGH PRESSURE STRETCHES ACROSS THE SOUTHERLY LATITUDES OF THE LOWER 48 STATES. THE RIDGE AXIS REACHES FROM THE MISSOURI-ARKANSAS BORDER WESTWARD THROUGH THE FOUR CORNERS. THIS POSITIONING PLACES NORTHERN ARIZONA IN A FAVORABLE LOCATION FOR CONTINUED MOISTURE INFLUX. AND THIS IS JUST WHAT MODELS ARE INDICATING THROUGH THE FORECAST PERIOD. THE ONLY EXCEPTION MAY BE LATE WEDNESDAY INTO THURSDAY WHEN MODELS INDICATE SLIGHTLY DRIER AIR TRANSITING NORTHERN ARIZONA FROM EAST TO WEST. AREAL COVERAGE OF STORMS WILL VARY FROM DAY TO DAY DEPENDING TO A CONSIDERABLE EXTENT ON WHICH LOCATIONS CAN WARM UP MOST QUICKLY TO TRIGGER CONVECTION. AREAS WHERE MORNING CLOUD COVER PREVENTS SURFACE HEATING OR CLOUD-FREE AREAS WHERE INSOLATION IS FIRST PUT TO USE FOR EVAPORATION OF EARLIER PRECIPITATION WILL LAG BEHIND IN STORM DEVELOPMENT. && .AVIATION...FOR THE 06Z PACKAGE...ISOLATED TO WIDELY SCATTERED SHOWERS WITH EMBEDDED THUNDERSTORMS ARE EXPECTED TO SLOWLY DIMINISH THIS EVENING ACROSS CENTRAL ARIZONA WITH MVFR/IFR CONDITIONS IN THESE SHOWERS AND STORMS. WITH ABUNDANT MOISTURE REMAINING OVER THE AREA...ANOTHER ROUND OF THUNDERSTORMS IS EXPECTED AFT 18Z TUESDAY. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FIRE WEATHER...SEE FIRE WEATHER FORECAST (FWFFGZ) FOR DISCUSSION OF DAYS 1 AND 2. THURSDAY THROUGH SATURDAY...EXPECT ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS EACH AFTERNOON AND EVENING. && PUBLIC.............42 AVIATION/FIRE WX...42 VISIT WEATHER.GOV/FLAGSTAFF FOR NORTHERN ARIZONA WEATHER INFORMATION.
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE FLAGSTAFF AZ 948 AM MST MON AUG 4 2008 AZZ004>018-037>040-050800- 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- 948 AM MST MON AUG 4 2008 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 EXPECT SCATTERED RAIN SHOWERS AND THUNDERSTORMS TO DEVELOP BY EARLY- TO MID-AFTERNOON OVER MOST HIGHER TERRAIN LOCATIONS. MOST FAVORABLE CONDITIONS EXIST OVER THE EASTERN MOGOLLON RIM...IN THE WHITE MOUNTAINS...AND OVER NORTHEASTERN GILA COUNTY. STORM MOVEMENT WILL BE RATHER SLOW AND TOWARD THE WEST-NORTHWEST. THE GREATEST HAZARD FROM TODAYS STORMS WILL BE THE AMOUNT OF WATER PRODUCED BY HEAVILY-PRECIPITATING...SLOW-MOVING STORMS. EXPECT ACTIVITY TO DIE OFF WITHIN A COUPLE OF HOURS AFTER SUNSET. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY EXPECT CONTINUED CHANCES FOR DAILY AFTERNOON AND EVENING THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. HOWARD
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
A spotter in Fort Valley Estates (on the northwest edge of Flagstaff) reported 3 inches of rain in 20 minutes. Rio de Flag and other streams were starting to flow.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2008Every state in 2008This day in weather historyWarnings in Arizona, August 2008
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: 129343.