Widespread areas of dense blowing dust with visibility less than 1/4 mile.
Every event with a place to put it. 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 PSR wrote it up.
Widespread areas of dense blowing dust with visibility less than 1/4 mile.
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 19, 7:55 PM MST, 1 hour 5 minutes earlier.
AZZ020>028-CAZ030>033-200600- AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 755 PM MST THU JUL 19 2007 UPDATED AVIATION SECTION SOUTH-CENTRAL AND SOUTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA FORECAST DISCUSSION .SYNOPSIS... STRONG HIGH PRESSURE ALOFT THAT HAS BEEN CENTERED OVER COLORADO IS MOVING NORTHEAST AWAY FROM ARIZONA. THIS MEANS LOWER TEMPERATURES FRIDAY AND SATURDAY...WITH TEMPERATURES THEN STAYING CLOSE TO AVERAGE FOR LATE JULY THROUGH THE MIDDLE OF NEXT WEEK. A DEEPER FLOW OF MOISTURE FROM THE EAST AND SOUTHEAST WILL BRING A BETTER CHANCE OF DESERT DUST STORMS...AS WELL AS SHOWERS AND THUNDERSTORMS...TO SOUTH-CENTRAL ARIZONA TONIGHT...AS WELL AS FRIDAY AFTERNOON AND NIGHT. THERE IS A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS OVER THE ENTIRE AREA THIS WEEKEND THROUGH THE MIDDLE OF NEXT WEEK...WITH THE BEST CHANCE IN THE HIGHER TERRAIN EAST OF THE GREATER PHOENIX AREA DURING THE AFTERNOONS AND EVENINGS. && .SHORT TERM... TONIGHT THROUGH SATURDAY... SHOWERS AND THUNDERSTORMS WERE DEVELOPING OVER SOUTHERN GILA COUNTY...OTHERWISE UNDER SUNNY SKIES...TEMPERATURES WERE GENERALLY 3 TO 5 DEGREES LOWER AND DEW POINT TEMPERATURES 4 TO AS MUCH AS 18 DEGREES HIGHER AT MID AFTERNOON TODAY COMPARED WITH THE SAME TIME YESTERDAY. GULF OF CALIFORNIA AIR WAS FLOWING INTO OUR AREA TODAY WITH WIND FROM THE SOUTH 10 TO 20 MPH ALONG THE LOWER COLORADO RIVER VALLEY INCLUDING YUMA...SOUTHEAST 5 TO 15 MPH IN SOUTHEAST CALIFORNIA...AND FROM THE SOUTHWEST AND WEST 15 TO 25 MPH IN SOUTH-CENTRAL ARIZONA INCLUDING THE GREATER PHOENIX AREA AT MID AFTERNOON. THE GULF OF CALIFORNIA AIR FLOWING INTO THE AREA RESULTED IN TEMPERATURES THAT DID NOT GET AS HOT AS FORECAST TODAY AND WERE DEFINITELY BELOW HEAT ADVISORY CRITERIA. THUS...HAVE CANCELLED THE HEAT ADVISORY THAT WAS IN EFFECT FOR THE SOUTH-CENTRAL ARIZONA DESERT AREAS INCLUDING THE GREATER PHOENIX AREA TODAY. IN ADDITION...HAVE LOWERED FORECAST TEMPERATURES SLIGHTLY LOWER FOR FRIDAY COMPARED TO THE PREVIOUS FORECAST FOR FRIDAY. SOME FURTHER LOWERING OF TEMPERATURES IS FORECAST FOR SATURDAY...WITH TEMPERATURES THEN STAYING CLOSE TO AVERAGE FOR LATE JULY THROUGH THE MIDDLE OF NEXT WEEK. STRONG HIGH PRESSURE ALOFT THAT HAS BEEN CENTERED OVER COLORADO AND RESPONSIBLE FOR THE 110 DEGREE PLUS WEATHER BEFORE TODAY WILL MOVE NORTHEAST TO THE VICINITY OF NEBRASKA AND SOUTH DAKOTA BY THE WEEKEND. AT THE SAME TIME...A DEEPER FLOW OF MOISTURE MOVING ACROSS OUR AREA FROM THE EAST AND SOUTHEAST WITH AN APPROACHING LOW PRESSURE SYSTEM WILL BRING A BETTER CHANCE OF DESERT DUST STORMS... SHOWERS AND THUNDERSTORMS TO SOUTH-CENTRAL ARIZONA TONIGHT...AS WELL AS FRIDAY AFTERNOON AND NIGHT. STRONG OUTFLOW WINDS FROM THUNDERSTORMS ARE EXPECTED TO GENERATE A DUST STORM BETWEEN TUCSON AND PHOENIX THIS EVENING WITH THE DUST STORM SPREADING NORTHWEST POSSIBLY INTO GREATER PHOENIX AREA THIS EVENING. THE FORECAST ALREADY INCLUDED AREAS OF BLOWING DUST FOR THE SOUTH-CENTRAL DESERT AREAS INCLUDING THE GREATER PHOENIX AREA...BUT HAVE RAISED THE POSSIBILITY OF THUNDERSTORMS INTO THE CHANCE CATEGORY FOR SOUTH-CENTRAL ARIZONA DESERT AREAS INCLUDING THE GREATER PHOENIX AREA FOR THIS EVENING. HAVE KEPT THE FORECAST BROAD BRUSHED WITH A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS OVER THE ENTIRE AREA THIS WEEKEND AS THE MOISTURE SPREADS WEST...EXCEPT FOR A CHANCE OVER THE HIGHER TERRAIN EAST OF THE GREATER PHOENIX AREA. && .LONG TERM... SUNDAY NIGHT THROUGH THURSDAY... PREVIOUS DISCUSSION... THE ATMOSPHERE WILL BE QUITE MOIST THROUGH THE ENTIRE LAYER...WITH LITTLE DAY TO DAY CHANGE EXPECTED. THUS...ITS DIFFICULT TO DETERMINE WHICH DAYS WILL SEE BETTER CONVECTION. IF WE END UP AS MOIST AS THE GFS IS SUGGESTING...WE COULD BE TOO MOIST FOR THUNDERSTORMS TO GET GOING HERE IN THE DESERT. WITH A SIGNIFICANT AMOUNT OF CLOUD COVER... ITS DIFFICULT TO GET SUFFICIENT SURFACE HEATING AND THUS A LIFT MECHANISM FOR THE MOISTURE (WITH THE EXCEPTION OF ANY DISTURBANCES THAT MAY MOVE THROUGH THE EASTERLIES). WE COULD END UP WITH PARTLY SUNNY/MOSTLY CLOUDY...MUGGY DAYS... WITH TEMPS ACROSS THE WARMEST DESERTS BELOW NORMAL FOR THIS TIME OF YEAR. THAT SAID...PLENTY OF UNCERTAINTY EXISTS FOR THE EXTENDED PORTION OF THE FORECAST... ESPECIALLY ACROSS THE DESERTS THIS TIME OF YEAR. && .AVIATION... JULY 20 02:55 UTC AT 755 PM...STRONG TO SEVERE THUNDERSTORMS WERE AFFECTING EASTERN PIMA COUNTY...INCLUDING THE GREATER TUCSON AREA. THE LEADING EDGE OF GUSTY OUTFLOW WINDS...WITH DENSE BLOWING DUST...WAS MOVING NORTH THROUGH THE TUCSON AREA. ISOLATED STORMS HAD ALSO DEVELOPED OVER SOUTHWEST GILA COUNTY. STRONG OUTFLOW...WITH DENSE BLOWING DUST...IS EXPECTED TO PUSH NORTH AND WEST ACROSS PINAL COUNTY BETWEEN 8 AND 930 PM...AND REACH KPHX/KIWA SHORTLY AFTER 930 PM. ISOLATED THUNDERSTORMS WILL BE TRIGGERED BY THE OUTFLOW...WITH BRIEF MDT/HVY RAIN AND LOCALLY STRONGER WINDS POSSIBLE INVOF OF KPHX/KIWA MAINLY BETWEEN 930 AND 1130 PM. IF ORGANIZED MCS CONTINUES TO DEVELOP AND PROPAGATE TOWARD THE WEST...GUSTY OUTFLOW WIND COULD REACH KYUX LATER ON. WILL CONTINUE TO MONITOR... SEE TAFS PHXTAFPHX...PHXTAFIWA...PHXTAFYUM...LAXTAFBLH AND LAXTAFIPL FOR MORE DETAILED INFORMATION. AVIATION DISCUSSION IS NOT UPDATED FOR AMENDED TAFS. && .FIRE WEATHER... HIGH PRESSURE OVER THE ROCKIES AND GREAT PLAINS...TOGETHER WITH A DISTURBANCE IN NORTHERN MEXICO...WILL ALLOW FOR AN INCREASE IN MOISTURE THROUGHOUT THE REGION THIS WEEKEND. THE FAVORABLE FLOW PATTERN IN THE UPPER LEVELS WILL MEAN A BETTER CHANCE OF WETTING RAIN EACH DAY THIS WEEKEND...WITH THE HIGHEST PROBABILITIES IN ZONE 133. MINIMUM RH IS EXPECTED TO BE SOMEWHAT HIGHER EACH DAY...AND THE OVERNIGHT RECOVERIES ARE EXPECTED TO BE VERY GOOD. SOME LOCATIONS IN ZONE 133 MAY HAVE 90 TO 100 PERCENT RH DURING PRECIP EVENTS. THERE WILL ALSO BE SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS ACROSS THE SOUTH-CENTRAL DESERTS EACH DAY. ALSO...EXPECT SLIGHT CHANCES FOR STORMS OVER SERN CA AND THE WESTERN AZ DESERTS. && .PSR WATCHES/WARNINGS/ADVISORIES... AZ...NONE. CA...NONE. && NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT WEATHER.GOV/PHOENIX SHORT TERM...ELLIS LONG TERM...WANEK AVIATION...DG FIRE WX...10
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 1250 PM MST THU JUL 19 2007 AZZ022-023-027-028-201400- NORTHWEST MARICOPA COUNTY-GREATER PHOENIX AREA- SOUTHWEST MARICOPA COUNTY- NORTHWEST AND NORTH CENTRAL PINAL COUNTY- 1250 PM MST THU JUL 19 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH-CENTRAL ARIZONA. .DAY ONE...TODAY AND TONIGHT A HEAT ADVISORY IS IN EFFECT FROM 10 AM TODAY THROUGH 8 PM MST THIS EVENING. PLEASE SEE THE HEAT ADVISORY PRODUCT...PHXNPWPSR...FOR ADDITIONAL INFORMATION. A DUST STORM FROM THE SOUTHEAST IS POSSIBLE THIS EVENING WITH DENSE BLOWING DUST CAUSING A SUDDEN REDUCTION IN VISIBILITY. THERE IS ALSO A BETTER CHANCE OF EVENING SHOWERS AND THUNDERSTORMS WITH THE MAIN THREAT BEING THE DENSE BLOWING DUST AND STRONG GUSTY WINDS AS WELL AS DANGEROUS CLOUD TO GROUND LIGHTNING. ALSO...BE ALERT FOR SLICK ROADS. REMEMBER THAT IF YOU ARE DRIVING AND SEE A DUST STORM APPROACHING... PULL OFF THE ROAD...PUT YOUR VEHICLE IN PARK...TAKE YOUR FOOT OFF THE BRAKE PEDAL...AND TURN YOUR LIGHTS ALL THE WAY OFF. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE WILL BE A CHANCE OF MAINLY LATE AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS THROUGH THE PERIOD. IN ADDITION TO THE POSSIBILITY OF DENSE BLOWING DUST...THE STORMS MAY ALSO PRODUCE LOCALLY HEAVY RAIN AS WELL AS DANGEROUS CLOUD TO GROUND LIGHTNING. LOCALLY HEAVY RAIN COULD LEAD TO FLOODING OF ROADS...WASHES AND LOW LYING AREAS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ024-201400- SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS- 423 AM MST THU JUL 19 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST-CENTRAL ARIZONA. .DAY ONE...TODAY AND TONIGHT THERE IS A CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS WITH THE MAIN HAZARDS BEING LOCALLY HEAVY RAIN WITH FLOODING...STRONG GUSTY AND POTENTIALLY DAMAGING WINDS...AND DEADLY CLOUD TO GROUND LIGHTNING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE WILL BE A CHANCE OF MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS THROUGH THE PERIOD. THE MAIN THREATS ARE EXPECTED TO BE HEAVY RAIN WITH FLOODING...STRONG GUSTY AND POTENTIALLY DAMAGING WINDS AND DEADLY CLOUD TO GROUND LIGHTNING. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ020-021-025-026-CAZ030>033-201400- 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- 423 AM MST THU JUL 19 2007 /423 AM PDT THU JUL 19 2007/ 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...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A SLIGHT CHANCE OF MAINLY EVENING SHOWERS AND THUNDERSTORMS. THE MAIN THREATS WITH ANY THUNDERSTORMS WOULD BE STRONG GUSTY AND DAMAGING WINDS...DENSE BLOWING DUST AND SAND CAUSING SUDDEN REDUCTION IN VISIBILITY...AND DEADLY CLOUD TO GROUND LIGHTNING. REMEMBER THAT IF YOU ARE DRIVING AND SEE A DUST STORM APPROACHING... PULL OFF THE ROAD...PUT YOUR VEHICLE IN PARK...TAKE YOUR FOOT OFF THE BRAKE PEDAL...AND TURN YOUR LIGHTS ALL THE WAY OFF. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. ELLIS/22
The Phoenix radar (KIWA), 38 km away, was scanning. The volume nearest the first event began at 04:01 UTC.
2 thunderstorm wind. Local standard time, as filed.
Damaging winds from thunderstorms took down power lines on west Martin Road and caused roof damage in portions of Coolidge.
Very strong winds kicked up widespread areas of dense blowing dust. Spotters reported less than 1/4 mile visibility.|
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2007Every state in 2007This day in weather historyWarnings in Arizona, July 2007
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: 51478, 40786.