1 thunderstorm wind, as filed by the National Weather Service.
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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 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 Nov 4, 2:36 PM MST, 5 hours 24 minutes earlier.
AZZ020>028-CAZ030>033-050545- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION. NATIONAL WEATHER SERVICE PHOENIX AZ 236 PM MST SUN NOV 4 2001 .SYNOPSIS... A LOW PRESSURE SYSTEM ON THE NORTHWEST BAJA AND SOUTHERN CALIFORNIA COASTLINE WILL CONTINUE TO MOVE TO THE EAST. IT WILL BE THE PRIMARY INFLUENCE ON THE WEATHER ACROSS SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA UNTIL AT LEAST TUESDAY EVENING...BRINGING CLOUDS AND SHOWERS ...AS WELL AS SOME COOLER TEMPERATURES. THE THREAT OF SHOWERS WILL END FOR SOUTHEAST CALIFORNIA AND FAR SOUTHWEST ARIZONA MONDAY...BUT WILL CONTINUE FOR THE HIGHER TERRAIN OF SOUTH-CENTRAL ARIZONA INTO TUESDAY. ALTHOUGH THERE WILL BE SOME COOLING AS THE LOW PASSES OVER THE REGION...HIGH TEMPERATURES ARE EXPECTED TO REMAIN MOSTLY AT OR ABOVE NORMAL. .DISCUSSION... UPPER LOW NOW APPEARS TO BE ON THE SRN CA AND NW BAJA COASTLINE... AND IT IS BEING NUDGED EWD BY A SYSTEM MOVING TOWARDS WRN CAN. THE AVN SEEMS TO BE DOING THE BEST IN HANDLING THE SRN CA LOW. SO FAR... ALL THE PRECIPITATION ON METAR HAS BEEN VERY LIGHT. MOST IS LIKELY MANIFESTING AS VIRGA AND NOT REACHING THE GROUND. SHOULD SEE MORE MEASURABLE RAINFALL TONIGHT AND MON AS THE LOW MOVES OVER THE AREA AND MORE AND STRONGER DYNAMICS COME INTO PLAY. LOOK FOR A SLIGHT CHANCE OF TSTMS MON OVER THE CENTRAL AND ERN CWA AS THE AIR BECOMES MORE UNSTABLE. P-WATER HAS INCREASED ACROSS ON THE SELY FLOW THAT HAS DEVELOPED PRECEDING THE LOW. WEAK TROUGH FOLLOWS THIS ONE AROUND WED...BUT WILL GENERALLY AFFECT AREAS N. NEXT ONE OF CONSEQUENCE FOR OUR AREA WILL LIKELY BE NEXT WEEKEND. MRF CONTINUES TO GIVE THE NEXT WEEKEND SYSTEM MORE THAN ITS DUE. THE ENSEMBLES...ET AL...SUGGEST A TROUGH FOR THE WEEKEND...BUT IT APPEARS IT MIGHT BE WEAKER THAN THE MRF SUGGESTS. FOR NOW...WILL SHOW SOME COOLING FOR SAT AND SUN...BUT WILL FOREGO MENTIONING ANY PRECIPITATION AS YET. NOGAPS BRINGS THIS SYSTEM IN 24 HRS FASTER THAN THE MRF. SINCE MODELS DO NOT AGREE... WILL WAIT AND SEE A BIT LONGER. WILT .PSR...NONE
The Yuma radar (KYUX), 25 km away, was scanning. The volume nearest the first event began at 03:02 UTC.
1 thunderstorm wind. Local standard time, as filed.
A vigorous low pressure system along the California coast helped trigger thunderstorms with strong and gusty wind. Widespread power outages were reported after approximately 20 main power poles were blown down. As many as 6,900 APS customers were left without power.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2001Every state in 2001This day in weather historyWarnings in Arizona, November 2001
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: 5275063.