1 hail, as filed by the National Weather Service.
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 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 22, 9:44 AM MST, 4 hours 36 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 944 AM MST MON AUG 22 2005 .SYNOPSIS...STRONG HIGH PRESSURE ALOFT WILL REMAIN OVER SOUTHEAST ARIZONA TODAY...RESULTING IN WARM CONDITIONS. ENOUGH MOISTURE EXISTS FOR ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS FROM THE TUCSON AREA EASTWARD TODAY AND INTO THIS EVENING. A LOW PRESSURE SYSTEM WILL APPROACH THE AREA BY TUESDAY...BRINGING AN INCREASED CHANCE OF THUNDERSTORMS ALONG WITH LOWER DAYTIME TEMPERATURES. A CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS WILL THEN PERSIST DURING THE REST OF THE WEEK. && .DISCUSSION...LATEST COMPOSITE RADAR MOSAIC SHOWS ISOLATED TO LOCALLY SCATTERED SHOWERS WITH A FEW THUNDERSTORMS THAT EXTEND GENERALLY FROM SOUTH OF THE PAYSON AREA TO JUST WEST OF GLOBE AND SOUTH ACROSS EXTREME EASTERN PINAL COUNTY FROM THE SAN CARLOS RESERVOIR TO SOUTH OF SAN MANUEL. ADDITIONAL ISOLATED LIGHT SHOWERS ARE OCCURRING IN NORTHEAST PIMA COUNTY...MAINLY NORTH OF TUCSON. WATER VAPOR IMAGERY SHOWS THE UPPER TROUGH SWINGING THROUGH SOUTHERN CALIFORNIA WITH A STORM COMPLEX TO OUR SOUTH IN SONORA MEXICO JUST SOUTH OF THE DOUGLAS AREA (PERHAPS 100 MILES OR SO). WITH ONGOING CONVECTION ALREADY OCCURRING...AND WITH THE UPPER LOW TO OUR WEST...AND WITH THE COMPLEX TO OUR SOUTH EXPECT THE THREAT FOR STORMS TO INCREASE AS THE DAY WEARS ON. IN ADDITION THE COMPLEX IN MEXICO COULD PUSH OUTFLOWS INTO SOUTHERN ARIZONA ADDING MOISTURE TO THE AREA. IN FACT...MOS NUMBERS ARE ALL INDICATING AN INCREASE IN DEWPOINT TEMPS OVER THE NEXT COUPLE OF DAYS...BUT THE GFS IS THE WETTEST WITH DEWPOINTS FOR TUCSON ADVERTISED TO BE IN THE LOWER 70S BY LATE TUESDAY AFTERNOON AND INTO THE EVENING. GFS IS INDICATING THAT A 35-40 KNOT JET AXIS IN THE UPPER LEVELS WILL MOVE ACROSS THE FOUR CORNERS AREA ON TUESDAY WITH OUR CWA BEING IN THE RIGHT REAR QUADRANT...BUT ON THE DOWN SIDE THE FLOW IS CONFLUENT NOT DIFFLUENT. AT ANY RATE I HAVE ALREADY BUMPED UP POPS IN THE GRIDS FOR MAINLY AREAS FROM TUCSON EASTWARD FROM TODAY THROUGH TUESDAY NIGHT. WILL UPDATE ZONES SHORTLY TO REFLECT THESE GRID CHANGES. && .PREVIOUS DISCUSSION... (555 AM MST MON AUG 22 2005) KEMX WSR-88D HAS DETECTED ISOLATED MOSTLY LESS THAN 40 DBZ ECHOES OVER NERN ZONE 29/SE PINAL COUNTY AS WELL AS OVER THE TUCSON METRO AREA DURING THE PAST 15-20 MINUTES. GIVEN RECEIPT OF 22/12Z KTUS SOUNDING AS WELL AS RADAR AND VISUAL TRENDS...HAVE OPTED TO UPDATE ZONE AND GRIDDED DATA FORECASTS TO REFLECT ISOLATED SHOWERS/THUNDERSTORMS THROUGH THE DAY ZONES 029-033-034. GIVEN THESE TRENDS BELIEVE THAT POP FORECASTS THIS AFTERNOON MAY BE UNDERDONE BUT WILL DEFER TO DAYSHIFT TO MAKE ADDITIONAL ADJUSTMENTS. IR SATELLITE IMAGERY INDICATED SCATTERED-BROKEN MID-LEVEL CLOUDS ACROSS CENTRAL/ERN SECTIONS WITH CLEAR SKIES W. DEWPOINTS WERE IN THE MID 50S-NEAR 60 WHICH WERE NEARLY IDENTICAL TO 24 HOURS AGO. ANALYSES OF 22/00Z UPPER AIR PLOTS INDICATED SHORTWAVE TROUGHS NEAR THE AZ/NM BORDER AS WELL AS OFF THE CA COAST. HIGH PRESSURE WAS CENTERED OVER E TX. GENERALLY LIGHT WLY FLOW PREVAILED OVER SRN AZ ABOVE H5. 22/00Z NAM/GFS SOLUTIONS SOMEWHAT DIFFERENT MAINLY WITH REGARD TO ADVECTING MOISTURE WWD QUICKER THAN PREVIOUS RUNS. GFS WAS MORE ROBUST WITH THIS NOTION VERSUS THE NAM. THUS HAVE OPTED TO INCREASE INHERITED POPS FOR THIS AFTERNOON ACROSS ERN SECTIONS BUT KEEP TUCSON VICINITY/ZONE 33 DRY. HOWEVER WILL REINTRODUCE SLIGHT CHANCE THUNDERSTORMS TUCSON VICINITY THIS EVENING BASED ON RECEIPT OF 22/00Z GUIDANCE. TUESDAY MAY VERY WELL BE AN ACTIVE DAY IF THE 22/00Z NWP SOLUTIONS ARE IN THE BALL PARK. FOR INSTANCE MODELS ARE IN GENERAL AGREEMENT THAT SE AZ WILL BE IN AREA OF STRONGLY DIFFLUENT FLOW ALOFT...STRONG MOISTURE DISCONTINUITY ALOFT PROGGED TO MOVE WWD DURING THE AFTERNOON AND EVENING...500 MB SHORTWAVE TROUGH APPROACHING FROM THE W...INCREASING LOW AND MID-LEVEL MOISTURE FROM THE S AND SE...AS WELL AS A MODERATELY UNSTABLE AIRMASS WITH PROGGED LIFTED INDEX VALUES APPROACHING MINUS 4 AS PER THE GFS SOLUTION. THUS HAVE OPTED TO INCREASE INHERITED POPS ESPECIALLY ACROSS CENTRAL/ERN SECTIONS FOR TUE AFTERNOON AND EVENING. THEREAFTER NO SIGNIFICANT ADJUSTMENTS TO INHERITED POP FORECASTS... AS AMPLE MOISTURE PROGGED TO EXIST THROUGH THE REST OF THE FORECAST PERIOD ACROSS SE AZ TO GENERATE MAINLY AFTERNOON/EVENING SHOWERS/ THUNDERSTORMS ESPECIALLY TUCSON VICINITY EWD. PER COORD WITH WFO/S PSR/FGZ DO BELIEVE THAT SOME DRYING MAY WELL BE JUSTIFIED ACROSS NRN AND CENTRAL AZ DURING THE LATTER PART OF THE WEEK AND WEEKEND...BUT DO NOT BELIEVE ANY DRYING OF SIGNIFICANCE WILL OCCUR ACROSS THIS FORECAST AREA DURING THE LATTER PERIODS...OR IN-LINE WITH THE 22/00Z GFS EXTENDED H7-H5 MOISTURE PROGS. WARMEST DAYTIME MAX TEMPS THIS FORECAST PERIOD EXPECTED TODAY. NOT QUITE SO WARM STARTING TUE...WITH DAYTIME MAX TEMPS DURING THE WED-SUN PERIOD EITHER BELOW...OR CLOSE TO SEASONAL NORMALS...FOR LATE AUG. && .AVIATION...TAF AND TWEBS ADEQUATELY COVER ALL SIGNIFICANT WEATHER AT KTUS. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE. && CURRENT DISCUSSION...MOLLERE PREVIOUS DISCUSSION...BF WEATHER.GOV/TUCSON
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TUCSON AZ 1240 PM MST MON AUG 22 2005 AZZ019-029>035-231400- NORTHERN GREENLEE COUNTY-UPPER GILA RIVER VALLEY-COCHISE COUNTY- SOUTHEAST PINAL COUNTY-TUCSON METRO/MARANA/GREEN VALLEY-SANTA CRUZ COUNTY-TOHONO OODHAM NATION-WESTERN PIMA COUNTY- 1240 PM MST MON AUG 22 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST ARIZONA .DAY ONE...TODAY AND TONIGHT SYNOPSIS...SHOWERS AND THUNDERSTORMS DEVELOPING OVER THE AREA EARLY THIS AFTERNOON...WITH STORMS MOVING SLOWLY TO THE SOUTHWEST AT 5 TO 10 MPH. STORM INTENSITY WILL BE ENHANCED EAST OF A LINE FROM QUEENS WELL AND NEWFIELD TODAY THANKS TO A DIVERGING WIND FLOW IN THE UPPER ATMOSPHERE. THE SLOW MOVEMENT OF STORMS AND ENHANCED THUNDERSTORM ACTIVITY ACROSS THE AREA...WILL MAKE THE MAIN THREAT LOCALIZED FLASH FLOODING. A SLIGHTLY ELEVATED THREAT OF DAMAGING WINDS IS PRESENT DUE TO ABUNDANT DRY AIR ALOFT ACCESSIBLE FOR ENTRAINMENT. DISCUSSION...THE LATEST PRECIPITABLE WATER IMAGERY INDICATED INCREASED MID-LEVEL MOISTURE WAS PRESENT ACROSS ALL OF SOUTHEAST ARIZONA...WITH THE DEEPEST LOW-LEVEL MOISTURE POSITIONED ACROSS THE CENTRAL CWA. SURFACE DEWPOINTS...A GOOD MEASURE OF LOW LEVEL MOISTURE...WERE GENERALLY IN THE UPPER 50S AND LOWER 60S THIS MORNING ACROSS VALLEY LOCATIONS THE LACK OF ANY SIGNIFICANT SHEAR WOULD SUGGEST THAT THE MAJORITY OF STORMS TODAY WILL BE OF THE PULSE TYPE VARIETY...BUT A FEW MULTICELL CLUSTER WILL ALSO BE POSSIBLE. THE SLOW STORM MOTION WOULD ALSO SUGGEST AN INCREASED RISK OF LOCALIZED HEAVY DOWNPOURS...AND RESULTING POSSIBILITY OF FLASH FLOODING...ALONG THE MOISTURE BOUNDARY ALOFT THERE IS A SLIGHTLY ELEVATED RISK OF STRONG THUNDERSTORM DOWNDRAFTS PRODUCING DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE WILL BE SCATTERED AFTERNOON AND EVENING THUNDERSTORMS THROUGHOUT THE PERIOD WITH THE POSSIBILITY OF LOCALIZED FLASH FLOODING AND DAMAGING WINDS POSSIBLE. PLEASE NOTE...THIS PRODUCT IS NOT UPDATED AND SERVES AS JUST AN OUTLOOK FOR THE THUNDERSTORM THREATS IN SOUTHEAST ARIZONA. PLEASE REFER TO OTHER NWS PRODUCTS FOR DETAILED INFORMATION REAL-TIME THUNDERSTORM HAZARDS.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
1050 AM MST MON AUG 22 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0645 PM DOWNBURST 3 S SAFFORD 32.79N 109.70W
08/21/2005 GRAHAM AZ TRAINED SPOTTER
2 LARGE OBSERVATIONS TOWERS, 20 FEET TALL, WERE BLOWN
OVER AS WELL AS SEVERAL TRAILERS WERE OVERTURNED AT THE
GRAHAM COUNTY FAIR GROUNDS.
&&
ELSLAGERThe Tucson radar (KEMX), 32 km away, was scanning. The volume nearest the first event began at 21:35 UTC.
1 hail. Local standard time, as filed.
A trained spotter near the City of Green Valley reported three quarter inch hail from a severe thunderstorm.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2005Every state in 2005This day in weather historyWarnings in Arizona, August 2005
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: 5469261.