A slow moving low pressure system brought mountain thunderstorms with heavy rain and large amounts of small hail.
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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 episode as NWS STO wrote it up.
A slow moving low pressure system brought mountain thunderstorms with heavy rain and large amounts of small hail.
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 Sacramento, CA wrote its last area forecast discussion before the first event at Jul 9, 3:30 AM PST, 2 hours 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SACRAMENTO CA 430 AM PDT THU JUL 9 2015 .SYNOPSIS... SCATTERED MAINLY MOUNTAIN SHOWERS OR THUNDERSTORMS THROUGH FRIDAY WITH HEAVY RAIN IN MOUNTAINS. ISOLATED FLASH FLOODING IS POSSIBLE. TEMPERATURES WILL BE BELOW NORMAL WITH A STRONG DELTA BREEZE. DRY SUNDAY THROUGH THE MIDDLE OF NEXT WEEK WITH A WARMING TREND. && .DISCUSSION... UPPER LOW NOW CENTERED OVER SOUTH CENTRAL CALIFORNIA AND SHIFTING EASTWARD. A SHORTWAVE CURRENTLY ROTATING AROUND THE TOPSIDE OF THE LOW BRINGING SOME SCATTERED LIGHT SHOWERS NORTH OF ABOUT OROVILLE. ANOTHER SHORTWAVE ROTATING UP THE EAST SIDE OF THE LOW BRINGING SOME ISOLATED THUNDERSTORM ACTIVITY OVER THE CENTRAL SIERRA AND THIS THUNDERSTORM ACTIVITY WILL LIKELY ROTATE INTO THE NORTHERN SIERRA PORTION OF THE CWA LATER THIS MORNING. MEANWHILE...FORT ORD PROFILER SHOWING A RATHER DEEP MARINE LAYER THIS MORNING AT ABOVE 3500 FEET COMBINED WITH A STRONG DELTA BREEZE. AS A RESULT...STRATUS DECK HAS EDGED INTO THE DELTA AND MAY MAKE IT INTO THE SOUTHERN SACRAMENTO VALLEY LATER THIS MORNING. UPPER LOW WILL SHIFT SLIGHTLY EASTWARD TODAY BUT REMAIN STATIONED MAINLY OVER NORTHERN AND CENTRAL CALIFORNIA PROVIDING MOISTURE AND INSTABILITY THROUGH THE DAY FOR A THREAT OF SHOWERS OR THUNDERSTORMS MOST AREAS. MOST UNSTABLE AREAS REMAIN OVER THE MOUNTAINS BUT CAN NOT RULE OUT SHOWER OR THUNDERSTORM THREAT VALLEY AREAS NORTH OF ABOUT SACRAMENTO. SLIGHTLY COOLER AIRMASS AND CLOUD COVER WILL BRING DOWN HIGH TEMPERATIRES TODAY TO A FEW TO SEVERAL DEGREES BELOW NORMAL. PRECIPITABLE WATER VALUES FORECAST TO REMAIN ABOVE AN INCH SO ANY THUNDERSTORM ACTIVITY SHOULD BE QUITE WET AND ISOLATED FLOODING MAY BE AN ISSUE AGAIN LIKE YESTERDAY. UPPER LOW LIFTS TO THE NORTHEAST INTO THE GREAT BASIN ON FRIDAY LEAVING A TROUGH ALONG THE COAST. ENOUGH INSTABILITY REMAINS FOR ANOTHER ROUND OF MOUNTAIN THUNDERSTORMS WITH A SLIGHT THREAT OVER THE NORTHERN SACRAMENTO VALLEY. LITTLE CHANGE IN THE SLIGHTLY BELOW NORMAL TEMPERATURES IS EXPECTED FRIDAY. A PORTION OF THE WEST COAST UPPER TROUGH MOVES NORTHEAST TOWARDS THE PACIFIC NORTHWEST ON SATURDAY BRINGING A THREAT OF SHOWERS OR THUNDERSTORMS OVER THE NORTHERN MOUNTAINS BUT OTHERWISE MOST LOCATIONS WILL SEE A DRIER PATTERN SATURDAY WITH TEMPERATURES STARTING TO WARM UP. SUNDAY LOOKS LIKE A DRY DAY ALL AREAS UNDER STABLE SOUTHWEST FLOW ALOFT AND A WEAK TROUGH OFF THE COAST. TEMPERATURES WARM SLIGHTLY ON SUNDAY BUT STILL CONE IN A LITTLE BELOW SEASON NORMALS. && .EXTENDED DISCUSSION (MONDAY THROUGH THURSDAY) MONDAY INTO THURSDAY, NORCAL WILL BE UNDER THE INFLUENCE OF A BROAD TROUGH AXIS WITHIN 100 MILES OF THE COAST, WHILE HIGH PRESSURE LINGERS OVER THE DESERT SOUTHWEST. AS A RESULT, THE SOUTHWEST FLOW ALOFT WILL BE FAIRLY STABLE AND DRY. TEMPERATURES WILL GRADUALLY WARM, BUT STAY NEAR TO JUST ABOVE NORMAL. JCLAPP && .AVIATION... SCT LIGHT SHOWERS ACROSS NORCAL THIS MORNING NORTH OF I-80. EXPECT SCT SHOWERS AND THUNDERSTORMS IN THE MOUNTAINS BRINGING LOCAL MVFR/IFR LATER TODAY WITH ISOLD STORMS SPREADING INTO THE NRN SAC VALLEY LATE AFTN/EVENING. MARINE LAYER BETWEEN 3000-4000 FT THICK THIS MORNING. CREEPING IN SOUTH OF TRAVIS AND REFORMING IN LOWER FOOTHILLS AND ERN SAC VALLEY FROM NEAR KLHM THROUGH ERN SAC COUNTY. STRATUS EXPANDING WESTWARD INTO KMCC, KMHR AND KSAC BY SUNRISE. BASES AROUND 012 TO 015 IN VALLEY. JCLAPP && .STO WATCHES/WARNINGS/ADVISORIES... NONE. &&
The national radar mosaic for the moment the first event began.
3 heavy rain. Local standard time, as filed.
There was a 24 hour total of 2.85 inches of rain, with 1.96 inches through 4 pm PDT Thursday, with an additional 0.89 inches through 7 am this morning.
Almost 2 inches of rain fell over 2 hours, from 11 am to about 1:30 pm PDT. Also, small hail 3/8 inch in diameter accumulated to several inches deep.
There were 1.5 inches of rain which fell over 24 hours.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2015Every state in 2015This day in weather historyWarnings in California, July 2015
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: 596743, 596742, 596744.