Gusty winds from the north resulted in a short power outage in Somerton.
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.
Gusty winds from the north resulted in a short power outage in Somerton.
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 Oct 1, 4:13 AM MST, 4 hours 47 minutes earlier.
AREA FORECAST DISCUSSION...UPDATE NATIONAL WEATHER SERVICE PHOENIX AZ 413 AM MST THU OCT 1 2009 .UPDATE... UPDATED AVIATION AND FIRE WEATHER SECTIONS. && .SYNOPSIS... A MUCH COOLER AIRMASS WILL SETTLE ACROSS THE AREA THROUGH SAT...RESULTING IN BELOW AVERAGE TEMPERATURES AND THE COOLEST CONDITIONS IN SEVERAL MONTHS. A LOW PRESSURE SYSTEM ACROSS THE WESTERN STATES WILL MOVE TOWARDS THE REGION SAT...TAPPING INTO TROPICAL MOISTURE ACROSS MEXICO. SHOWERS AND PERHAPS A FEW THUNDERSTORMS ARE EXPECTED SAT NIGHT AND EARLY SUN. DRIER AIR WILL MOVE INTO THE AREA BY SUNDAY EVENING WITH THE COOLER CONDITIONS PERSISTING THROUGH NEXT WEEK. && .DISCUSSION... LATEST OBSERVATIONS SHOW THE SIGNIFICANTLY COOLER TEMPS AND DEWPOINTS ACROSS THE FORECAST AREA IN THE WAKE OF THE COLD FRONT. PROJECTED MAX TEMP OF 92 DEG TODAY IN PHX WILL BE THE COOLEST NON-PRECIPITATION INDUCED MAX TEMP IN ALMOST FOUR MONTHS. SINGLE DIGIT DEWPOINTS WILL ALSO PRODUCE RHS NEAR 5 PERCENT THIS AFTERNOON. DEEP MOISTURE LURKS ACROSS SOUTHERN BAJA...ASSOCIATED WITH A TROPICAL DISTURBANCE IN THE EASTERN PACIFIC. MODELS ARE IN GOOD AGREEMENT THAT MOISTURE WILL GRADUALLY INCREASE FRI-SAT AS A TROUGH DIVES SOUTHWARD OUT OF WESTERN CANADA AND CLOSES OFF IN THE GREAT BASIN. POSITION OF THE SUBTROPICAL MOISTURE PLUME IS NOT QUITE IDEAL FOR A WIDESPREAD RAIN EVENT. HOWEVER...STRONG UPSLOPE FLOW WILL STILL GENERATE SOME RAINFALL...MAINLY ACROSS SOUTH-CENTRAL AZ SAT NIGHT AND EARLY SUN WHERE 1000-700 MB MIXING RATIOS WILL PEAK NEAR 10-12 G/KG. MODERATELY STRONG JET-FORCED ASCENT (PERHAPS ENHANCED BY EL NINO) WILL ALSO BE A PLAYER WITH THIS EVENT. CONVECTIVE PARAMETERS POINT TO THE POTENTIAL FOR A FEW THUNDERSTORMS SAT NIGHT AND SUN MORNING BEFORE DRIER AIR WORKS IN FROM THE WEST...THOUGH THE THREAT IS GENERALLY LOW FOR STRONG STORMS. FCST WAS GENERALLY WEIGHTED TOWARDS THE GFS AS THE WETTER 00Z NAM-WRF APPEARED TO BE MORE OF AN OUTLIER. INTERMEDIATE NAM-WRF CONFIRMS THIS WAS PROBABLY THE CASE. CLOSED LOW ACROSS THE INTERMOUNTAIN WEST WILL NOT BE IN MUCH OF A HURRY TO SLIDE EASTWARD. THIS WILL RESULT IN LOWER THAN AVERAGE HEIGHTS ACROSS THE DESERT SOUTHWEST ALONG WITH BELOW NORMAL TEMPERATURES THROUGH NEXT WEEK. && .AVIATION... KPHX AND KIWA... MUCH LIGHTER WINDS EXPECTED TODAY AND TONIGHT. THIS MORNING WINDS ARE GENERALLY LESS THAN 5 KTS AND FAVORING A RESIDUAL NWLY DIRECTION THOUGH WEAK ELY DRAINAGE FLOWS ARE TRYING TO DEVELOP. WILL LIKELY END UP WITH LGT/VRB WINDS THROUGH THE MORNING...BECOMING PREDOMINANTLY WLY BY LATER AFTERNOON. LGT/VRB WINDS RETURN TONIGHT. KIPL AND KBLH... W/NW WINDS CAN BE EXPECTED THROUGH FRIDAY MORNING. COULD SEE A PERIOD OF BREEZY NLY WIND AT KBLH DURING THE LATE MORNING/EARLY AFTERNOON HOURS AS SOME STRONGER WINDS JUST OFF THE SURFACE MIX DOWN AS THE ATMOSPHERE WARMS UP. OTHERWISE NO SIGNIFICANT ISSUES. AVIATION DISCUSSION NOT UPDATED FOR AMENDED TAFS. && .FIRE WEATHER... SATURDAY THROUGH THURSDAY... A LOW PRESSURE SYSTEM FROM THE GULF OF ALASKA WILL DROP DOWN THE WEST COAST THIS WEEKEND AND THEN REMAIN OVER THE WESTERN STATES INTO NEXT WEEK. MOISTURE WILL INCREASE AHEAD OF THE SYSTEM SATURDAY INTO SUNDAY BRINGING A THREAT FOR SHOWERS AND A FEW STORMS...MAINLY FOR MARICOPA COUNTY AND LOCALES TO THE EAST. RAIN CHANCES WILL FALL BY MONDAY. PERIODS OF INCREASED WINDS WILL BE POSSIBLE AS WELL...THOUGH NO SIGNIFICANT WINDS ARE EXPECTED AT THIS TIME. RH VALUES WILL RISE SHARPLY WITH THE RAIN CHANCES DURING THE WEEKEND...THEN FALL BACK SOME EARLY NEXT WEEK. TEMPERATURES WILL FLUCTUATE LITTLE DURING THE PERIOD. && .PSR WATCHES/WARNINGS/ADVISORIES... AZ...NONE. CA...NONE. && NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT WEATHER.GOV/PHOENIX DISCUSSION...HIRSCH AVIATION...INIGUEZ FIRE WEATHER...INIGUEZ
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 520 AM MST THU OCT 1 2009 AZZ020>028-CAZ030>033-021230- LOWER COLORADO RIVER VALLEY AZ-WEST CENTRAL DESERTS- NORTHWEST MARICOPA COUNTY-GREATER PHOENIX AREA- SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS- YUMA/MARTINEZ LAKE AND VICINITY-SOUTHWEST DESERTS- SOUTHWEST MARICOPA COUNTY-NORTHWEST AND NORTH CENTRAL PINAL COUNTY- JOSHUA TREE NATIONAL PARK-LOWER COLORADO RIVER VALLEY CA- RIVERSIDE COUNTY/EASTERN DESERTS-IMPERIAL COUNTY- 520 AM MST THU OCT 1 2009 /520 AM PDT THU OCT 1 2009/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST-CENTRAL ARIZONA...EXTREME SOUTHWEST ARIZONA...EXTREME WEST-CENTRAL ARIZONA... SOUTH-CENTRAL ARIZONA...SOUTHWEST ARIZONA...WEST-CENTRAL ARIZONA... EXTREME SOUTHEAST CALIFORNIA AND SOUTHEAST CALIFORNIA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT WEATHER.GOV/PHOENIX
1 strong wind. Local standard time, as filed.
Gusty winds caused power lines to contact each other and left about 1,469 APS customers without electricity on Thursday morning.
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, October 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: 200292.