Heavy rain from a nearly stationary thunderstorm caused flash flooding in Adelanto.
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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 SGX wrote it up.
Heavy rain from a nearly stationary thunderstorm caused flash flooding in Adelanto.
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 San Diego, CA wrote its last area forecast discussion before the first event at Jul 16, 1:00 PM PST, 5 hours earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN DIEGO CA 200 PM PDT WED JUL 16 2008 .SYNOPSIS... LINGERING MONSOONAL MOISTURE WILL BRING A SLIGHT CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS TODAY OVER THE SAN BERNARDINO COUNTY MOUNTAINS AND DESERTS. COASTAL LOW CLOUDS WILL BECOME MORE EXTENSIVE DURING THE NIGHTS AND MORNINGS INTO THE WEEKEND. OTHERWISE...MINOR DAY TO DAY CHANGES WITH TEMPERATURES NEAR SEASONAL AVERAGES. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... .SHORT TERM (TONIGHT THROUGH FRIDAY)... THIS AFTERNOON...SOME CUMULUS CLOUDS HAVE DEVELOPED OVER THE SAN BERNARDINO MTNS AND THE UPPER JOHNSON VALLEY BUT SO FAR SHOW LITTLE VERTICAL DEVELOPMENT. DEEP CONVECTION IS STILL POSSIBLE BUT IS INCREASINGLY UNLIKELY AS THE ATMOSPHERE CONTINUES TO STABILIZE OVER THE AREA. THE MARINE LAYER STRATUS HAS CLEARED FROM ALL AREAS EXCEPT OVER THE COASTAL WATERS...BUT IS EXPECTED TO BEGIN MOVING ONSHORE AGAIN AROUND SUNSET. THE DRYING TREND OF THE PAST FEW DAYS WILL CONTINUE WITH DECREASING AFTERNOON CUMULUS CLOUDS...AND THUNDERSTORM CHANCES LIMITED MAINLY TO THE SAN BERNARDINO COUNTY MOUNTAIN AND DESERT AREAS. AS THE MID LEVEL MOISTURE DECREASES...NIGHT AND MORNING COASTAL STRATUS WILL BECOME MORE EXTENSIVE AND EXTEND LOCALLY INLAND INTO THE LOWER COASTAL VALLEYS. OTHERWISE...MINOR DAY TO DAY CHANGES WITH GENERALLY SEASONAL TEMPERATURES. .LONG TERM (SATURDAY THROUGH TUESDAY)... MODEL GUIDANCE INDICATES THAT OVERALL TEMPERATURES WILL REMAIN NEAR SEASONAL AVERAGES WITH SOME DAY TO DAY CHANGES IN THE MARINE LAYER. SOMEWHAT COOLER CONDITIONS ARE EXPECTED WEST OF THE MTNS FOR THE WEEKEND WITH A GREATER MARINE LAYER INFLUENCE AS AN UPPER LEVEL LOW PRESSURE TROUGH MOVES INTO NORTHERN CALIFORNIA. MINOR AMOUNTS OF MONSOONAL MOISTURE MAY BEGIN TO RETURN LATE IN THE WEEKEND AND EARLY NEXT WEEK FOR MORE AFTERNOON CLOUDS OVER THE MOUNTAINS AND A REDUCED MARINE LAYER PRESENCE. && .AVIATION... 161915Z...MARINE LAYER DEPTH THIS AFTERNOON REMAINS NEAR 1000 FEET. LITTLE CHANGE IS EXPECTED IN THE MARINE LAYER DEPTH THROUGH THURSDAY. PATCHY STRATUS SHOULD REFORM ALONG THE IMMEDIATE COAST BY SUNSET AND PUSH LOCALLY INLAND INTO THE LOWER COASTAL VALLEYS AND MESAS BETWEEN 04Z AND 07Z AND INTO THE WESTERN INLAND VALLEY AREAS BY MIDNIGHT. STRATUS SHOULD REMAIN CLEAR OF THE KONT AREA TONIGHT. ABOVE THE MARINE LAYER...THE AIR MASS IS BECOMING A LITTLE MORE STABLE SO HAVE BACKED AWAY FROM EXPECTING ANY TSTMS OVER THE MOUNTAINS NEAR L35...BIG BEAR...FOR THIS AFTERNOON. CU AND ISOLATED TCU CAN BE EXPECTED THIS AFTERNOON AND AGAIN THURSDAY AFTERNOON. OTHERWISE A MOSTLY CLEAR SKY WITH UNRESTRICTED VISIBILITIES WILL CONTINUE THROUGH THURSDAY. EXPECTED MAX TEMPS FOR THU FOR KPSP AND KTRM...41 TO 43C...KONT...35 TO 37C...KSNA...28 TO 30C AND KSAN...25C. && .SGX WATCHES/WARNINGS/ADVISORIES... CA...NONE. PZ...NONE. && PUBLIC...PG AVIATION/MARINE...HORTON NWS ON THE WEB AT WEATHER.GOV/SANDIEGO
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN DIEGO CA 400 PM PDT WED JUL 16 2008 CAZ042-043-048-050-055>058-060>062-171200- ORANGE COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS- SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS- RIVERSIDE COUNTY MOUNTAINS-SANTA ANA MOUNTAINS AND FOOTHILLS- SAN DIEGO COUNTY MOUNTAINS-APPLE AND LUCERNE VALLEYS- COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 400 PM PDT WED JUL 16 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST CALIFORNIA. .DAY ONE...REMAINDER OF THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT...SKYWARN WEATHER ACTIVATION IS NOT REQUESTED FOR THIS AREA...HOWEVER WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS. ATKIN
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
Heavy rain from a thunderstorm caused flash flooding at the intersection of U.S. 395 and Highway 18 in Adelanto. Several motorist were stranded by the flood waters.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2008Every state in 2008This day in weather historyWarnings in California, July 2008
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: 113986.