Ample monsoonal moisture combined with daytime heating caused strong thunderstorms over Santa Cruz County.
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.
Ample monsoonal moisture combined with daytime heating caused strong thunderstorms over Santa Cruz County.
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 Jul 17, 2:15 PM MST, 31 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 215 PM MST TUE JUL 17 2007 .SYNOPSIS...HIGH PRESSURE ALOFT WILL REMAIN NEAR THE FOUR CORNERS. ADEQUATE MOISTURE IN COMBINATION WITH DAYTIME HEATING WILL PROVIDE ISOLATED TO SCATTERED THUNDERSTORMS MAINLY DURING THE AFTERNOON AND EVENING HOURS. ACTIVITY WILL INCREASE FURTHER THROUGH THE WEEK AS STRONGER EASTERLY FLOW OCCURS. && .DISCUSSION...STORMS ARE FIRING OVER THE HIGHER TERRAIN AND SLOWLY MOVING NORTHWEST. STORM MOTION THIS AFTERNOON AND EVENING WILL BE DEPENDANT ON STORM MERGERS AND OUTFLOW CONVERGENCE. MODIFIED TUS SOUNDING FOR TEMP 106 AND DEWPOINT 47 YIELDS ABOUT 500 J/KG OF CAPE FOR VALLEY PROPAGATION AND LI MINUS 3...WHICH IS SLIGHTLY MORE STABLE VERSUS YESTERDAY AND STORM COVERAGE IS A BIT LOWER. STORMS WILL BE ELEVATED WITH BASES AROUND 14000 FT...ENHANCING DOWNBURST AND ASSOCIATED BLOWING DUST POTENTIAL. WATER VAPOR IMAGERY SHOWS WELL DEFINED MOISTURE BOUNDARY FROM SELLS SOUTH INTO NRN SONORA. A LITTLE BETTER FLOW BY LATE EVENING...AS IS CURRENTLY NOTED OVER NEW MEXICO MAY ENHANCE ACTIVITY OVER THE EAST. UPPER HIGH IS CENTERED OVER NORTHERN NEW MEXICO/SRN COLORADO...WITH ELONGATED RIDGING EXTENDING SOUTHWEST TO THE NRN GULF OF CALIFORNIA. UPPER LOW IS JUST OFF THE PACIFIC NORTHWEST COAST...WITH TROUGHING SOUTH ALONG THE WEST COAST. UPPER LEVEL DISTURBANCE IS OVER NORTHEAST MEXICO SOUTH OF THE TEXAS BIG BEND...WITH TROUGHING EXTENDING NORTHEAST TO LOUISIANA. UPPER HIGH WILL GRADUALLY SHIFT NORTH INTO COLORADO OVER THE NEXT COUPLE OF DAYS...AS WEST COAST TROUGH SWINGS NORTHEAST OVER THE PACIFIC NORTHWEST. UPPER DISTURBANCE WILL TRACK WEST ACROSS NORTH-CENTRAL MEXICO THROUGH FRIDAY...INVERTED TROUGH WILL EXTEND NORTHEAST FROM THE DISTURBANCE AND APPROACH THE DESERT SOUTHWEST AS THE WEEK PROGRESSES. INFLUENCE FROM THIS SYSTEM WILL BEGIN WEDNESDAY IN THE FORM OF INCREASED MID-LEVEL FLOW. SOUTHEAST ARIZONA WILL CONTINUE IN A FAVORABLE EASTERLY FLOW PATTERN...WITH PROGRESSIVELY STRONGER WESTERLY MOVING DISTURBANCES THROUGH THE EXTENDED PERIOD. MODELS SHOW EASTERLY WAVE APPROACHING THE AREA LATE WEDNESDAY AND THURSDAY FOR INCREASED ACTIVITY. HAVE ISSUED A HEAT ADVISORY FOR THE WESTERN AND CENTRAL DESERTS WHERE TEMPS WILL CLIMB TO BETWEEN 110-115 DEGREES...AJO WAS 115 DEGREES YESTERDAY AND SELLS 111. EXPECT MORE OF THE SAME TODAY. && .FIRE WEATHER...THE DAILY CYCLE OF MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS IS EXPECTED TO OCCUR THIS WEEK. WINDS WILL BE DIURNALLY DRIVEN...WITH AFTERNOON GUSTS UP TO 30 MPH DUE TO STRONG SURFACE HEATING. ADDITIONALLY...ANY THUNDERSTORMS THAT OCCUR WILL BE CAPABLE OF PRODUCING STRONG GUSTY AND ERRATIC WINDS. RELATIVE HUMIDITY VALUES OVERNIGHT WILL BE IN THE 45 TO 75 PERCENT RANGE...WITH VALUES DROPPING IN THE AFTERNOON HOURS INTO THE 20 TO 30 PERCENT RANGE. && .AVIATION...EXPECT SCT TSRA/SHRA COVERAGE THIS AFTERNOON AND EVENING. EXPECT BKN090CB...VRB WIND GUSTS TO 45 KTS AND BRIEF VISIBILITY REDUCTION TO UNDER 3 SM IN BLOWING DUST WITH STORMS THIS EVENING. AVIATION DISCUSSION NOT UPDATED FOR TAF AND TWEB AMENDMENTS. && .CLIMATE...THE CONSECUTIVE DAY STREAK OF DAYTIME HIGH TEMPERATURES OF 100 OR GREATER AT THE TUCSON AIRPORT HAS REACHED 35 DAYS AS OF TUESDAY. WE ARE CURRENTLY FORECASTING HIGH TEMPERATURES TO BE 100 OR HIGHER EACH DAY THROUGH JULY 22ND...WHICH WOULD BREAK THE ALL-TIME RECORD OF 39 CONSECUTIVE DAYS. HOWEVER...THE FORECAST IS ALSO ANTICIPATING AN INCREASE IN THUNDERSTORM ACTIVITY THIS WEEK WHICH COULD PUT IN JEOPARDY ANY DAY AFTER TODAY FOR HITTING 100 DEGREES. IN ANY EVENT...IT WILL BE ANOTHER HISTORIC RUN OF 100+ TEMPERATURES FOR TUCSON. TOP 5 LONGEST CONSECUTIVE DAY STREAKS OF HIGHS 100 DEGREES OR BETTER: 1) 39 DAYS IN 2005 (JUNE 14TH TO JULY 22ND) 39 DAYS IN 1987 (JUNE 7TH TO JULY 15TH) 3) 34 DAYS IN 2007 (JUNE 13TH TO JULY 16TH) *** 4) 33 DAYS IN 2002 (JUNE 13TH TO JULY 15TH) 5) 32 DAYS IN 1942 (JUNE 13TH TO JULY 14TH) && .TWC WATCHES/WARNINGS/ADVISORIES...HEAT ADVISORY IS IN EFFECT FOR WESTERN AND CENTRAL PIMA COUNTIES THROUGH 8 PM. && SHOEMAKER WEATHER.GOV/TUCSON
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TUCSON AZ 848 AM MST TUE JUL 17 2007 AZZ031-032-181600- WESTERN PIMA COUNTY-TOHONO OODHAM NATION- 848 AM MST TUE JUL 17 2007 ...HEAT ADVISORY IN EFFECT TODAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARIZONA. .DAY ONE...TODAY AND TONIGHT WITH STRONG HIGH PRESSURE OVERHEAD EXPECT ANOTHER DAY WHERE AFTERNOON HIGHS RANGE FROM 112 TO 116 DEGREES IN WESTERN PIMA COUNTY AND THE TOHONO OODHAM NATION. IN ADDITION...EXPECT ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS LATER THIS AFTERNOON INTO THIS EVENING ACROSS THE TOHONO OODHAM NATION...WITH SOME STORMS EXPECTED TO MOVE WESTWARD INTO WESTERN PIMA COUNTY. MAIN THREAT FROM STORMS WILL BE STRONG GUSTY WINDS AND BRIEF HEAVY RAIN. SOME STORM MAY APPROACHING SEVERE LIMITS AND THE HEAVY RAIN MAY CAUSE SOME LOCALIZED FLOODING PROBLEMS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. AS THE UPPER HIGH REMAINS NEAR THE FOUR CORNERS REGION...EXPECT AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY WITH A FEW APPROACHING SEVERE LIMITS. FLASH FLOODING WILL ALSO BE A THREAT EACH DAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ033-181600- TUCSON METRO/MARANA/GREEN VALLEY- 848 AM MST TUE JUL 17 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ARIZONA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL ONCE AGAIN FORM OVER THE MOUNTAINS THIS AFTERNOON AND MOVE ACROSS THE VALLEY AROUND 5 TO 10 MPH. MAIN THREAT FROM THESE STORMS THIS AFTERNOON AND EVENING WILL BE STRONG GUSTY WINDS WITH A FEW STORMS APPROACHING SEVERE LIMITS AND BRIEF HEAVY RAIN. AREAS OF BLOWING DUST ARE ALSO POSSIBLE...ESPECIALLY AROUND MARANA. THE HEAVY RAIN MAY CAUSE SOME LOCAL FLOODING PROBLEMS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. AS THE UPPER HIGH REMAINS NEAR THE FOUR CORNERS REGION...EXPECT AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY WITH A FEW APPROACHING SEVERE LIMITS. FLASH FLOODING WILL ALSO BE A THREAT EACH DAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ029-181600- SOUTHEAST PINAL COUNTY- 848 AM MST TUE JUL 17 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARIZONA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL ONCE AGAIN FORM OVER THE CATALINA MOUNTAINS THIS AFTERNOON AND MOVE NORTH ACROSS THE COUNTY. MAIN THREAT FROM STORMS THIS AFTERNOON AND EVENING WILL BE STRONG GUSTY WINDS WITH A FEW STORMS APPROACHING SEVERE LIMITS. THESE STRONG GUSTY WINDS MAY ALSO PRODUCE AREAS OF BLOWING DUST WITH VISIBILITIES DOWN TO AROUND ONE MILE. BRIEF HEAVY RAIN MAY ALSO ACCOMPANY THE STORMS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. AS THE UPPER HIGH REMAINS NEAR THE FOUR CORNERS REGION...EXPECT AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY WITH A FEW APPROACHING SEVERE LIMITS. FLASH FLOODING WILL ALSO BE A THREAT EACH DAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ034-181600- SANTA CRUZ COUNTY- 848 AM MST TUE JUL 17 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ARIZONA. .DAY ONE...TODAY AND TONIGHT EXPECT ANOTHER AFTERNOON AND EVENING OF SCATTERED SHOWERS AND THUNDERSTORMS. MAIN THREAT FROM THESE STORMS WILL BE STRONG GUSTY WINDS AND BRIEF HEAVY RAIN. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. AS THE UPPER HIGH REMAINS NEAR THE FOUR CORNERS REGION...EXPECT AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY WITH A FEW APPROACHING SEVERE LIMITS. FLASH FLOODING WILL ALSO BE A THREAT EACH DAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ035-181600- COCHISE COUNTY- 848 AM MST TUE JUL 17 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ARIZONA. .DAY ONE...TODAY AND TONIGHT EXPECT ANOTHER AFTERNOON AND EVENING OF SCATTERED SHOWERS AND THUNDERSTORMS. MAIN THREAT FROM THESE STORMS WILL BE STRONG GUSTY WINDS AND BRIEF HEAVY RAIN. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. AS THE UPPER HIGH REMAINS NEAR THE FOUR CORNERS REGION...EXPECT AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY WITH A FEW APPROACHING SEVERE LIMITS. FLASH FLOODING WILL ALSO BE A THREAT EACH DAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ030-181600- UPPER GILA RIVER VALLEY- 848 AM MST TUE JUL 17 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ARIZONA. .DAY ONE...TODAY AND TONIGHT EXPECT ANOTHER AFTERNOON AND EVENING OF SCATTERED SHOWERS AND THUNDERSTORMS. MAIN THREAT FROM THESE STORMS WILL BE STRONG GUSTY WINDS AND BRIEF HEAVY RAIN. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. AS THE UPPER HIGH REMAINS NEAR THE FOUR CORNERS REGION...EXPECT AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY WITH A FEW APPROACHING SEVERE LIMITS. FLASH FLOODING WILL ALSO BE A THREAT EACH DAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ019-181600- NORTHERN GREENLEE COUNTY- 848 AM MST TUE JUL 17 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ARIZONA. .DAY ONE...TODAY AND TONIGHT EXPECT ANOTHER AFTERNOON AND EVENING OF SCATTERED SHOWERS AND THUNDERSTORMS. MAIN THREAT FROM THESE STORMS WILL BE STRONG GUSTY WINDS AND BRIEF HEAVY RAIN ALONG WITH SMALL HAIL. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. AS THE UPPER HIGH REMAINS NEAR THE FOUR CORNERS REGION...EXPECT AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY WITH A FEW APPROACHING SEVERE LIMITS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
241 PM MST TUE JUL 17 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0240 PM HAIL NOGALES 31.36N 110.93W
07/17/2007 E1.00 INCH SANTA CRUZ AZ LAW ENFORCEMENT
QUARTER SIZED HAIL AT NOGALES SHERIFF/S OFFICE. STRONG
WINDS ALSO IN PROGRESS.
&&
PYTLAKThe Tucson radar (KEMX), 66 km away, was scanning. The volume nearest the first event began at 21:47 UTC.
1 hail, 1 thunderstorm wind. Local standard time, as filed.
A severe thunderstorm over the city of Nogales caused hail one inch in diameter.
Several trees were knocked down in the downtown area of Nogales due to strong winds from a strong thunderstorm.
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: 34559, 34561.