A severe thunderstorm produces damaging winds, heavy rain, and pea sized hail in Star Valley.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 severe thunderstorm produces damaging winds, heavy rain, and pea sized hail in Star Valley.
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, 3:15 PM MST, 3 hours 5 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 315 PM MST TUE AUG 18 2008 .SYNOPSIS...DRIER AIR WILL FILTER INTO THE REGION FOR THE REMAINDER OF THE WEEK. ISOLATED SHOWERS AND THUNDERSTORMS WILL CONTINUE FROM FLAGSTAFF SOUTHEASTWARD...WITH MOSTLY SUNNY TO PARTLY CLOUDY SKIES ELSEWHERE. NEAR NORMAL TEMPERATURES ARE EXPECTED TO CONTINUE. && .DISCUSSION...A FEW ISOLATED STORMS HAVE FORMED ACROSS YAVAPAI AND COCONINO COUNTY...WITH MOST OF THE STORMS DEVELOPING OVER THE EASTERN RIM AND WHITES. STORMS ARE MOVING...FOR THE MOST PART...TO THE SOUTHEAST. EXPECT THESE STORMS TO DIMINISH RAPIDLY AFTER SUNSET. HIGH PRESSURE AND A DRIER AIR MASS WILL BE MOVING EASTWARD ACROSS NORTHERN ARIZONA TOMORROW THROUGH THE NEXT SEVERAL DAYS. THIS WILL RESULT IN A DECREASE IN THUNDERSTORM COVERAGE...WITH THE BEST CHANCES LIMITED TO THE THE EASTERN RIM AND WHITES TOMORROW. MODELS ARE ADVERTISING THE HIGH PRESSURE RIDGE MOVING ACROSS THE STATE FOR THE NEXT SEVERAL DAYS...AND SETTING UP SHOP OVER THE FOUR CORNERS REGION. IF THIS SCENARIO OCCURS...THE FORECAST AREA WILL RETURN TO A MORE FAVORABLE SOUTH TO SOUTHEAST FLOW. THIS WILL RESULT IN AN INCREASE IN MOISTURE AND CONVECTIVE ACTIVITY ACROSS THE REGION. WILL CONTINUE IN A LOW GRADE MONSOON PATTERN FOR NOW. && .AVIATION...FOR THE 00Z PACKAGE...ISOLATED TO WIDELY SCATTERED SHOWERS THUNDERSTORMS WILL CONTINUE THIS EVENING UNTIL 02Z WHERE SHOWER ACTIVITY WILL RAPIDLY DIMINISH. ON WEDNESDAY AFTER 18Z EXPECT ISOLATED TO WIDELY SCATTERED SHOWERS THUNDERSTORMS TO REDEVELOP ACROSS THE MOGOLLON RIM AND WHITE MOUNTAINS...WITH CLOUD BASES 130-150 MSL AND LCL MVFR IN THE STRONGEST STORMS. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FIRE WEATHER...SEE FIRE WEATHER FORECAST (FWFFGZ) FOR DISCUSSION OF DAYS 1 AND 2. FRIDAY THROUGH SUNDAY...EXPECT DRIER CONDITIONS WITH A BREAK EXPECTED IN THE MONSOON MOISTURE PATTERN THROUGH SATURDAY WITH A POSSIBLE INCREASE IN MOISTURE ON SUNDAY. ONLY ISOLATED AFTERNOON SHOWERS AND THUNDERSTORMS ARE EXPECTED...MAINLY OVER THE MOGOLLON RIM...THE WHITE MOUNTAINS AND THE DEFIANCE PLATEAU...FIRE WEATHER ZONES 111 AND 115-118...WITH LITTLE ACTIVITY ELSEWHERE. MINIMUM RH VALUES ARE FORECAST TO BE ABOVE 15 PERCENT OVER MOST FIRE WEATHER ZONES EXCEPT FOR THE LOWER ELEVATION AREAS ALONG THE UTAH/ARIZONA BORDER WHERE MINIMUM RH VALUES MAY DROP BELOW 15 PERCENT EACH AFTERNOON. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. PUBLIC...............42 AVIATION/FIRE WX.....BOHLIN VISIT WEATHER.GOV/FLAGSTAFF FOR NORTHERN ARIZONA WEATHER INFORMATION.
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 120 PM MST MON AUG 18 2008 AZZ004>018-037>040-191045- 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- 120 PM MST MON AUG 18 2008 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 A VERY MOIST AND UNSTABLE AIR MASS RESIDING ACROSS NORTHERN ARIZONA WILL AGAIN PROVIDE THE CHANCE FOR SHOWERS AND THUNDERSTORMS ACROSS THE AREA THIS AFTERNOON. CONVECTION WILL INITIATE OVER THE HIGH TERRAIN BY 1100 AM MST. STORM MOVEMENT WILL BE FROM THE NORTHWEST TO THE SOUTHEAST AT 15 MILES PER HOUR. THE THREATS FOR TODAY WILL BE LOCALLY HEAVY RAIN...WINDS UP TO 50 MPH...AND HAIL THREE-QUARTERS OF AN INCH OR LESS IN DIAMETER. A FEW STORMS MAY PRODUCE HAIL LARGER THAN THREE-QUARTERS OF AN INCH. SOME AREAS HAVE ALREADY RECEIVED VERY HEAVY RAIN OVER THE PAST 48 TO 72 HOURS. THESE AREAS INCLUDE PORTIONS OF WESTERN COCONINO COUNTY OVER THE CATARACT CREEK BASIN...AS WELL AS AREAS ACROSS THE MOGOLLON RIM. WITH THE GROUND NEAR OR AT SATURATION IN THESE LOCATIONS...ANY STRONG THUNDERSTORMS THAT MOVE OVER THESE AREAS MAY CAUSE LOCALIZED FLOODING ISSUES. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY FOR TUESDAY...EXPECT A SLIGHT CHANCE FOR SHOWERS AND THUNDERSTORMS OVER THE KAIBAB PLATEAU AND WESTERN MOGOLLON RIM WITH A CHANCE FOR SHOWERS AND THUNDERSTORMS ACROSS THE EASTERN RIM AND WHITE MOUNTAINS. ON WEDNESDAY AND BEYOND...EXPECT A SLOW DRYING TREND ACROSS THE NORTHLAND AS DRIER AIR PUSHES IN FROM THE WEST. THIS WILL LIMIT THE CHANCES FOR SHOWERS AND THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
The Gila County Sheriff office reported a thunderstorm that knocked down trees with strong winds. This storm also produce heavy rain and pea sized hail.
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: 132314.