Severe thunderstorm winds resulted in a power outage in the Roosevelt Lakes estates area.
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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 PSR wrote it up.
Severe thunderstorm winds resulted in a power outage in the Roosevelt Lakes estates 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 Phoenix, AZ wrote its last area forecast discussion before the first event at Jul 1, 5:00 PM MST, 2 hours 31 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 500 PM MST WED JUL 1 2009 .UPDATE... UPDATED AVIATION DISCUSSION. && .SYNOPSIS... THE ATMOSPHERE REMAINS MOIST AND UNSTABLE FOR ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS THIS EVENING. THE DAILY THREAT FOR AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH THE WORK WEEK...ALONG WITH HIGH TEMPERATURES A FEW DEGREES BELOW NORMAL FOR THIS TIME OF YEAR. LATE IN THE WEEKEND AND INTO EARLY NEXT WEEK...A DRIER SOUTHWESTERLY FLOW WILL CONFINE SHOWERS AND THUNDERSTORMS TO PRIMARILY THE HIGHER TERRAIN NORTH AND EAST OF THE PHOENIX AREA...WHILE ALLOWING HIGH TEMPERATURES TO RETURN TO NEAR NORMAL FOR THIS TIME OF YEAR. && .DISCUSSION... AS OF 2PM...SAT TRENDS ARE ENCOURAGING...SHOWING CLEARING OVER THE S-CNTRL AZ DESERTS THIS PAST HOUR OR SO. DOWN OVER SOUTHEAST AZ...WHERE THEY STARTED WITH LESS CLOUDS THAN THE CENTRAL DESERTS...ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ARE UNDERWAY. THE RIM IS ALSO STARTING TO FILL IN A BIT...AND WE CAN SEE CU BUILDING OUT THE WINDOW TO THE SOUTH...AS WELL AS OVER PORTIONS OF THE NORTHWEST VALLEY. THE STEERING FLOW REMAINS FAVORABLE...EAST/SOUTHEASTERLY FROM 700-500MB AT 15-20KT. MODIFYING THE /FAIRLY CONTAMINATED/ 12Z PSR SOUNDING FROM THIS MORNING...AND USING A FORECAST HIGH OF 100 WITH A MIXING RATIO OF 10.5 G/KG...THE MEAN TEMP METHODOLOGY YIELDS ABOUT 520 J/KG OF CAPE...WITH A SLIVER OF CONVECTIVE INHIBITION. SHOULD NOT TAKE MUCH TO OVERCOME THE NEG ENERGY-- A GOOD OUTFLOW PUSH FROM THE EAST OR SOUTHEAST...ALONG WITH A BIT OF COOL ADVECTION IN THE MID LEVELS FROM THE HIGHER TERRAIN STORMS MIGHT BE ALL IT TAKES TO GET THINGS GOING IN THE SOUTH-CENTRAL DESERTS EASTWARD. OUT WEST WHERE A WEAK LINE OF SHOWERS AND THUNDERSTORMS SLOWLY MOVED NORTHWESTWARD THROUGH THE CWA EARLIER TODAY...THE CLOUDS ARE HANGING IN THERE...AND KBLH TEMP IS DOWN 13 DEG FROM THIS TIME YESTERDAY. THAT SAID...WE CANNOT EXPECT THE THERMAL DYNAMICS ALONE TO GET THINGS GOING OUT THAT WAY...AND WILL NEED TO RELY ON A GREATER DEAL OF LIFT/SUPPORT ALOFT. NAM AND RUC ARE BOTH SHOWING A DECENT AREA OF UPPER LEVEL DIVERGENCE ROTATING AROUND THE WESTERN EDGE OF THE HIGH. THIS AREA OF UPPER LEVEL SUPPORT IS PROGGED TO MOVED NORTHWARD THROUGH W-CNTRL ARIZONA LATER THIS EVENING AND OVERNIGHT...AND SHOULD HELP TO OVERCOME THE LACK OF SURFACE HEATING OVER THE WESTERN DESERTS. AS SUCH...THE FORECAST CALLS FOR SCATTERED SHOWERS AND THUNDERSTORMS PRETTY MUCH FROM OUR WESTERN CWA BOUNDARY EASTWARD THROUGH SOUTHERN GILA COUNTY THIS AFTERNOON AND EVENING. THUNDERSTORMS THAT DEVELOP WILL BE CAPABLE OF PRODUCING STRONG AND GUSTY OUTFLOW WINDS IN EXCESS OF 40 MPH...WITH PERIODS OF BRIEF HEAVY RAIN. BUT IN TERMS OF SEVERE...TEMPS/TD PROFILE DOES NOT REALLY SUPPORT IT. TOMORROW THROUGH THE END OF THE WORK WEEK...THE MOISTURE WILL HANG AROUND...FOR A CONTINUED THREAT OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY...FAVORING THE HIGHER TERRAIN...WITH DESERT HIGH TEMPS RUNNING A FEW DEG BELOW NORMAL. DIFFICULT TO SAY WITH MUCH CERTAINTY WHAT THE WEATHER WILL BE 12 HOURS OUT THIS TIME OF YEAR...AND GOING BEYOND DAY 2 REALLY IS BEST LEFT TO CLIMO. LATE IN THE WEEKEND AND NEXT WEEK...MODELS CONTINUE TO SHOW A DRIER WEST/SOUTHWESTERLY FLOW OVER THE REGION...CONFINING THE THREAT FOR DAILY SHOWERS ANDS THUNDERSTORMS TO THE HIGHER TERRAIN...WHILE ALLOWING DESERT HIGHS TO WARM BACK TO NEAR NORMAL FOR EARLY JULY. && .AVIATION... PHX/KIWA AND SURROUNDING AIRFIELDS...CLOUDINESS FROM EARLIER TODAY HAS THINNED OUT. THIS SHOULD AID IN THE DEVELOPMENT OF INSTABILITY BUT STORMS HAVE BEEN SLOW TO DEVELOP ON THE LOWER ELEVATIONS. WILL BE WATCHING STORM ACTIVITY OVER SOUTHEAST ARIZONA AND THE RIM COUNTRY TO PRODUCE OUTFLOWS WHICH MAY PROVIDE NECESSARY LIFT TO TRIGGER STORMS OVER THE PHOENIX AREA. WITHOUT THAT...WILL NEED DYNAMICAL HELP FROM A DISTURBANCE PROGGED TO MOVE NORTHWARD ACROSS ARIZONA TONIGHT. THIS DISTURBANCE IS NOT READILY EVIDENT IN THE WATER VAPOR IMAGERY THOUGH. HOWEVER...LOCATION OF MOST ACTIVE CONVECTION IN SOUTHEAST ARIZONA CORRESPONDS WELL WITH WHERE THIS FEATURE SHOULD BE. DUE TO THE MEAGER LATE AFTERNOON CONVECTIVE ACTIVITY...HAVE HELD OFF ON PUTTING IN TEMPO GROUPS FOR THUNDERSTORMS AND STRONG WINDS IN THE TAFS. BUT POTENTIAL IS STILL THERE SO AMMENDMENTS WILL QUITE POSSIBLY BE NECESSARY. KIPL/KBLH AND SURROUNDING AIRFIELDS...DEBRIS CLOUDINESS HAS CONTINUED TO HOLD ON FROM NEAR THE LOWER COLORADO RIVER VALLEY WESTWARD. THIS HAS LIKELY INHIBITED INSTABILITY. WITH HIGH DEW POINTS...AND MODEST AIR TEMPERATURES...ANY STORMS THAT DO DEVELP WILL BE MORE LIKELY TO PRODUCE BRIEF HEAVY RAIN THAN VERY STRONG WINDS. CLOUD BASES WOULD LIKELY BE WELL BELOW 10 KFT. DUE TO THE ABUNDANT MOISTURE...STORM ACTIVITY CANT BE RULED OUT...BUT THIS AREA SEEMS LESS LIKELY TO BENEFIT FROM THE UPPER DISTURBANCE ADVERTISED TO MOVE THROUGH ARIZONA. THUS HAVE HELD OFF ON TEMPO GROUPS FOR THUNDERSTORMS. BUT DUE TO MOISTURE AVAILABILITY...STORM POTENTIAL IS STILL THERE SO AMMENDMENTS MAY VERY WELL BE NECESSARY. AVIATION DISCUSSION NOT UPDATED FOR AMENDED TAFS. && .FIRE WEATHER... SATURDAY THROUGH WEDNESDAY... MOISTURE WILL BE SLOWLY DECREASING DURING THE PERIOD UNDER A SOUTHWEST FLOW ALOFT. THERE WILL BE ENOUGH HUMIDITY FOR SLIGHT CHANCES FOR AFTERNOON AND EVENING THUNDERSTORMS MAINLY OVER THE HIGHER TERRAIN. SUNSHINE WILL DOMINATE THE LOWER DESERTS WITH TEMPERATURES NEAR NORMAL. && .PSR WATCHES/WARNINGS/ADVISORIES... AZ...NONE. CA...NONE. && NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT WEATHER.GOV/PHOENIX DISCUSSION...WANEK AVIATION...AJ FIRE WEATHER...SIPPLE
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 242 PM MST WED JUL 1 2009 AZZ022-023-027-028-021330- NORTHWEST MARICOPA COUNTY-GREATER PHOENIX AREA- SOUTHWEST MARICOPA COUNTY-NORTHWEST AND NORTH CENTRAL PINAL COUNTY- 242 PM MST WED JUL 1 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH-CENTRAL ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS ARE EXPECTED. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS IN EXCESS OF 40 MPH...DENSE BLOWING DUST...BRIEF HEAVY RAINFALL AND DEADLY CLOUD TO GROUND LIGHTNING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THERE IS A SLIGHT CHANCE FOR LATE AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS IN EXCESS OF 40 MPH...DENSE BLOWING DUST...BRIEF HEAVY RAINFALL AND DEADLY CLOUD TO GROUND LIGHTNING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY LATE THIS AFTERNOON OR THIS EVENING. AZZ024-021330- SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS- 242 PM MST WED JUL 1 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST-CENTRAL ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT MOISTURE CONTINUES TO INCREASE ACROSS THE AREA...AND SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED THIS AFTERNOON INTO THIS EVENING. HAZARDS INCLUDE GUSTY WINDS IN EXCESS OF 40 MPH AS WELL AS BRIEF HEAVY RAIN. HEAVY RAIN COULD LEAD TO FLOODING OF STREAM OR WASHES. DEADLY LIGHTNING IS ALSO POSSIBLE WITH THE STRONGER STORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THERE IS A CONTINUED CHANCE FOR AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS THROUGH SUNDAY. EXPECT SLIGHTLY DRIER AIR TO SPREAD INTO THE AREA NEXT WEEK FOR SLIGHT CHANCES OF STORMS. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS IN EXCESS OF 40 MPH...DENSE BLOWING DUST...BRIEF HEAVY RAINFALL AND DEADLY CLOUD TO GROUND LIGHTNING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY LATE THIS AFTERNOON AND INTO THIS EVENING. AZZ020-021-025-026-CAZ030>033-021330- LOWER COLORADO RIVER VALLEY AZ-WEST CENTRAL DESERTS- YUMA/MARTINEZ LAKE AND VICINITY-SOUTHWEST DESERTS- JOSHUA TREE NATIONAL PARK-LOWER COLORADO RIVER VALLEY CA- RIVERSIDE COUNTY/EASTERN DESERTS-IMPERIAL COUNTY- 242 PM MST WED JUL 1 2009 /242 PM PDT WED JUL 1 2009/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME SOUTHWEST ARIZONA...EXTREME WEST-CENTRAL ARIZONA...SOUTHWEST ARIZONA...WEST- CENTRAL ARIZONA...EXTREME SOUTHEAST CALIFORNIA AND SOUTHEAST CALIFORNIA. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS ARE EXPECTED. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS IN EXCESS OF 40 MPH...DENSE BLOWING DUST...BRIEF HEAVY RAINFALL AND DEADLY CLOUD TO GROUND LIGHTNING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THERE IS A SLIGHT CHANCE FOR LATE AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS INTO SATURDAY NIGHT. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS IN EXCESS OF 40 MPH...DENSE BLOWING DUST...BRIEF HEAVY RAINFALL AND DEADLY CLOUD TO GROUND LIGHTNING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY LATE THIS AFTERNOON AND INTO THIS EVENING. NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT WEATHER.GOV/PHOENIX
The Phoenix radar (KIWA), 72 km away, was scanning. The volume nearest the first event began at 02:32 UTC.
1 thunderstorm wind. Local standard time, as filed.
Power outage on Wednesday evening at the Frazier substation was due to very strong winds. Spotter reports included debrs blowing around due to the strong wind. Heavy rain was also reported, with .98 inch in 45 minutes at Roosevelt Dam.
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, July 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: 169385.