S. allowing for isolated severe thunderstorms across the region.
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 TWC wrote it up.
A strong trough of low pressure moved into the western U.S. allowing for isolated severe thunderstorms across the region.
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 Tucson, AZ wrote its last area forecast discussion before the first event at Aug 28, 2:30 PM MST, 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST SAT AUG 28 2010 .SYNOPSIS...A RATHER STRONG TROUGH OF LOW PRESSURE WILL MOVE INTO THE WESTERN U.S. THROUGH SUNDAY. HOWEVER BY SUNDAY THIS SAME TROUGH WILL INDUCE A DRIER SOUTHWEST FLOW WHICH WILL TEMPORARILY SHUNT THE DEEPER MOISTURE SOUTH AND EAST OF THE REGION. AS THE TROUGH WEAKENS AND UPPER LEVEL HIGH OVER THE SOUTHERN PLAINS BUILDS BACK TO THE WEST. A MORE TYPICAL MONSOON PATTERN WILL RESUME FOR THE START OF THE NEW MONTH. && .DISCUSSION...ISOLATED TO SCATTERED THUNDERSTORMS ACROSS FAR SOUTHEAST PINAL...EASTERN PIMA...SANTA CRUZ AND WESTERN COCHISE COUNTIES AS OF 225 PM. A FEW SPOTTERS UNDER SOME OF THESE STORMS HAVE REPORTED HEAVY RAIN...SMALL HAIL AND GUSTY WINDS. AREAL COVERAGE OF STORMS WILL CONTINUE TO INCREASE OVER THE REST OF THE AFTERNOON HOURS. SINCE WE'VE HAD REPORTS OF SMALL HAIL ALREADY...I HAVE ADDED WORDING TO THE TEXT/GRID BASED FORECASTS. ACTIVITY SHOULD BE DIMINISHING AFTER SUNSET. UPPER TROF TO OUR WEST WILL STRENGTHEN SOUTHWEST FLOW ALOFT OVER THE AREA. STILL SUFFICIENT LOW LEVEL MOISTURE AROUND FOR CONTINUED CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS...MAINLY EASTERN 2/3RDS OF THE FORECAST AREA. SOME STORMS MAY BE STRONG...ESPECIALLY FROM TUCSON EAST. ON MONDAY...TROF LIFTS THROUGH THE GREAT BASIN...THUS TURNING THE MIDLEVEL WINDS MORE OUT OF THE WEST...WHICH WILL DRIVE IN MORE DRIER AIR FROM THE WEST. HAVE LIMITED THUNDERSTORM COVERAGE TO AREAS FROM TUCSON EAST. WITH THE TROF OUT OF THE AREA ON TUESDAY...HIGH PRESSURE ALOFT STARTS TO BUILD IN FROM THE EAST. THIS WILL START TO TURN THE MID-LEVEL FLOW OUT OF THE SOUTH...THUS ADVECTING MOISTURE IN FROM THE SOUTH. THIS WILL CONTINUE FOR THE REMAINDER OF THE WORK WEEK. THUS HAVE CONTINUED TO SLOW UPTICK IN POPS EACH DAYS...BUT STILL RIGHT AROUND CLIMATOLOGY AS THE CALENDAR TURNS FROM AUGUST TO SEPTEMBER. && .AVIATION...ISOLATED TO SCATTERED TSRA/SHRA THIS AFTERNOON/EVENING MAINLY EAST OF A KOLS...TO KTUS...TO KSOW LINE. EXPECT SCT CLOUD DECKS AT 5-8K FT AGL AREAWIDE THIS AFTERNOON/EVENING...WITH AREAS OF SCT-BKN CLOUDS AT 3-5K FT AGL THROUGH 04Z MAINLY EAST OF A KOLS-KSAD LINE. RAINFALL MAY GENERATE MVFR CEILINGS/VISIBILITIES AT THE TAF SITES AT TIMES. NORMAL DIURNAL WIND TRENDS ARE EXPECTED. THERE WILL BE SOME STRONG GUSTY OUTFLOWS FROM AREA THUNDERSTORM DEVELOPMENT... WITH WIND GUSTS UP TO 45 KTS WITH THE STRONGER THUNDERSTORMS. AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS. && .FIRE WEATHER...NO FIRE WEATHER CONCERNS AT THIS TIME. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE. WEATHER.GOV/TUCSON
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TUCSON AZ 113 PM MST SAT AUG 28 2010 AZZ019-029-030-033>035-290700- NORTHERN GREENLEE COUNTY-SOUTHEAST PINAL COUNTY- UPPER GILA RIVER VALLEY-TUCSON METRO/MARANA/GREEN VALLEY- SANTA CRUZ COUNTY-COCHISE COUNTY- 113 PM MST SAT AUG 28 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARIZONA AND SOUTHEAST ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT DRIER AIR ALOFT HAS MOVED IN FROM THE WEST. HOWEVER AT THE SURFACE SUFFICIENT MOISTURE REMAINS. COMBINED WITH THE AFTERNOON HEATING SCATTERED SHOWERS AND THUNDERSTORMS WILL BE DEVELOPING AND LASTING INTO THE EARLIER EVENING HOURS. LOCALLY HEAVY RAIN AND WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THE STRONGEST STORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE WILL BE A CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ031-032-290700- WESTERN PIMA COUNTY-TOHONO OODHAM NATION- 113 PM MST SAT AUG 28 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT DRIER AIR HAS MOVED IN ALOFT WHICH WILL LIMIT THE CHANCES OF THUNDERSTORM DEVELOPMENT. HOWEVER WITH SUFFICIENT MOISTURE REMAINING AT THE SURFACE...CAN'T RULE OUT THUNDERSTORM DEVELOPMENT. ACROSS EASTERN PORTIONS OF THE TOHONO OODHAM NATION...SOME OF THE STORMS THAT DEVELOP WILL BE CAPABLE OF PRODUCING LOCALLY HEAVY RAIN. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE WILL BE A SLIGHT CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. WEATHER.GOV/TUCSON
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 200 PM MST SAT AUG 28 2010 AZZ035-282145- COCHISE COUNTY AZ- 200 PM MST SAT AUG 28 2010 ...SIGNIFICANT WEATHER ADVISORY FOR WESTERN COCHISE COUNTY UNTIL 245 PM MST... AT 153 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 6 MILES EAST OF HUACHUCA CITY...OR 8 MILES NORTH OF SIERRA VISTA...MOVING EAST AT 10 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. AREAS AFFECTED BY THIS STORM INCLUDE...NICKSVILLE...FAIRBANK... CHARLESTON...HEREFORD...TOMBSTONE AND JUNCTION OF HIGHWAYS 80 AND 90. LAT...LON 3199 10991 3139 10993 3143 11025 3185 11036 TIME...MOT...LOC 2100Z 275DEG 5KT 3166 11023
The Tucson radar (KEMX), 55 km away, was scanning. The volume nearest the first event began at 21:44 UTC.
2 thunderstorm wind, 2 flash flood. Local standard time, as filed.
Thunderstorms developed over the Tucson metro area resulting in small hail and damaging winds up to 60 mph. Spotters reported trees down at Campbell Ave and Skyline Road.
Nearly stationary thunderstorms developed over southern portions of the Tucson metro causing very heavy rainfall. This heavy rainfall lead to road closures in South Tucson including the closure of Hughes Access Road at South County Club Road.
Very heavy rainfall across portions of eastern Tucson brought flash flooding that resulted in a swift water rescue on the Alamo Wash at Lee St and Alamo Ave.
Spotters reported about five trees uprooted at Golf Links and Swan Road at the entrance to Davis-Monthan Air Force Base. City officials also reported numerous arching power line wires and tree fires throughout the east side of the city.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2010Every state in 2010This day in weather historyWarnings in Arizona, August 2010
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: 248166, 248163, 248164, 248182.