Strong storms moved over Northwest Oregon bringing heavy rainfall amounts to much of the area over a short period of time. This heavy rainfall caused a landslide to occur in Southwest Portland.
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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 PQR wrote it up.
Strong storms moved over Northwest Oregon bringing heavy rainfall amounts to much of the area over a short period of time. This heavy rainfall caused a landslide to occur in Southwest Portland.
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 Portland, OR wrote its last area forecast discussion before the first event at Jun 5, 7:00 PM PST, 6 hours 1 minute earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PORTLAND OR 800 PM PDT SAT JUN 5 2010 .SYNOPSIS...THE ACTIVE PACIFIC JET STREAM WILL CONTINUE THROUGH A GOOD PART OF THIS WEEK. THE NEXT SYSTEM WILL SPREAD ONSHORE TONIGHT AND SUNDAY WITH RAIN AT TIMES. THIS SYSTEM WILL MOVE OFF TO THE EAST SUNDAY NIGHT AND MONDAY MORNING WITH DECREASING SHOWERS. ANOTHER SYSTEM WILL APPROACH LATE TUESDAY AND MOVE ACROSS SOUTHWEST WASHINGTON AND NORTHWEST OREGON TUESDAY NIGHT AND WEDNESDAY FOR MORE AREAS OF RAIN...WITH SHOWERS LINGERING INTO THURSDAY AND FRIDAY. && .SHORT TERM...RADAR AND SURFACE OBS INDICATE WHATEVER PRECIPITATION THAT HAS MOVED INTO THE AREA SO FAR THIS EVENING HAS BEEN LIGHT. SATELLITE DERIVED RAINFALL RATES FROM EARLIER THIS AFTERNOON IDENTIFY THE THICKER LOOKING CLOUDS IN IR AND VIS PICTURES NOW APPROACHING 126W AS CONTAINING THE MAIN AREA OF RAIN WITH THE FIRST WEAK SHORTWAVE MOVING IN TONIGHT. TIMING USING CURRENT SATELLITE DERIVED SPEED SUGGESTS RAIN SPREADING ONTO THE COAST BEFORE MIDNIGHT...AND INLAND SHORTLY AFTER...SO THE CATEGORICAL POPS FOR LATER TONIGHT LOOK REASONABLE. WHILE THE AXIS OF THE GREATEST TROPICAL MOISTURE REMAINS TO THE S... SATELLITE DERIVED PRECIPITABLE WATER PICTURES INDICATE PRECIPITABLE WATER VALUES UP TO 1.25 INCHES HAS BEEN PULLED INTO TONIGHTS SYSTEM...SO DESPITE WEAK DYNAMICS THE MOIST AIR MASS SUGGESTS A DECENT RAIN LATER TONIGHT FOR MUCH OF THE AREA. REMAINDER OF SHORT TERM DISCUSSION UNCHANGED... THE PRECIPITATION TURNS SHOWERY SUN AFTERNOON AS THE MAIN UPPER SHORT WAVE CROSSES OUR AREA. MODELS SUGGEST SOME INSTABILITY OVER THE CENTRAL OREGON CASCADES SUN AFTERNOON FOR A SLIGHT CHANCE OF TSTMS. FLAT RIDGING MOVES IN SUN NIGHT AND MON MORNING FOR A DECREASING CHANCE OF SHOWERS. MON AFTERNOON SHOULD BE DRY WITH SOME PARTLY SUNNY CONDITIONS BREAKING OUT...AND TEMPS RECOVERING BACK TO NEAR 70 PER 850 MB TEMPS. DRY AND MILD CONDITIONS SHOULD PERSIST THROUGH MOST OF TUE...UNTIL SOME MOISTURE OUT AHEAD OF THE NEXT SYSTEM RIDING THE MOIST JETSTREAM GIVES A CHANCE OF MOUNTAIN SHOWERS. RW .LONG TERM...NO CHANGES. PREVIOUS DISCUSSION FOLLOWS. CLOUDS SHOULD INCREASE LATE TUESDAY AS A SHORTWAVE APPROACHES THE AREA. MORE PRECIPITATION SHOULD MOVE IN LATE TUESDAY TOWARD WEDNESDAY MORNING FOR CONTINUED WET WEATHER. EXCEPT FOR SOME TIMING DIFFERENCES WITH INDIVIDUAL DISTURBANCES...MODELS ARE IN GOOD AGREEMENT SHOWING THE NEXT UPPER TROUGH SETTING UP OVER THE EASTERN PAC FOR THE WED INTO FRI TIME FRAME. THUS A CHANCE OF SHOWERS APPEARS PRUDENT FOR THE REMAINDER OF THE LONG TERM FORECAST. RW/BROWN && .AVIATION...HIGH PRESSURE OVER THE AREA WITH VFR CONDITIONS THROUGH THIS EVENING. WEAK LOW PRESSURE MOVES IN OVERNIGHT THROUGH NORTHERN OREGON. MVFR CONDITIONS ARE LIKELY MOST AREAS BY MORNING MOST AREAS AND SHOULD CONTINUE WELL INTO SUNDAY. KPDX AND APPROACHES...VFR CONDITIONS EXPECTED TO PREVAIL THROUGH THIS EVENING. RAIN CHANCES INCREASE OVERNIGHT AND MVFR CEILINGS AND VISIBILITIES ARE LIKELY BY MORNING AND CONTINUING TILL MID DAY. THEN...MOSTLY VFR IN SHOWERS IN THE AFTERNOON. && .MARINE...WEAK LOW PRESSURE APPROACHING FROM THE WEST WILL BRING A SLIGHT CHANCE OF SMALL CRAFT ADVISORY WINDS LATE TONIGHT AND EARLY SUNDAY...MAINLY TO THE CENTRAL OREGON COAST. SEAS REMAIN BELOW 10 FT DURING THIS EVENT. HIGH PRESSURE BRINGS A RETURN TO NW FLOW MONDAY. && .PQR WATCHES/WARNINGS/ADVISORIES... OR...NONE. WA...NONE. PZ...NONE. && MORE WEATHER INFORMATION ONLINE AT... HTTP://WEATHER.GOV/PORTLAND THIS DISCUSSION IS FOR NORTHWEST OREGON AND SOUTHWEST WASHINGTON FROM THE CASCADE CREST TO 60 NAUTICAL MILES OFFSHORE. THE AREA IS COMMONLY REFERRED TO AS THE FORECAST AREA.
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PORTLAND OR 505 AM PDT SAT JUN 5 2010 ORZ001>014-WAZ019>023-039-040-061330- NORTH OREGON COAST-CENTRAL OREGON COAST- COAST RANGE OF NORTHWEST OREGON- CENTRAL COAST RANGE OF WESTERN OREGON-LOWER COLUMBIA- GREATER PORTLAND METRO AREA-CENTRAL WILLAMETTE VALLEY- SOUTH WILLAMETTE VALLEY-WESTERN COLUMBIA RIVER GORGE- NORTHERN OREGON CASCADE FOOTHILLS-NORTHERN OREGON CASCADES- CASCADE FOOTHILLS IN LANE COUNTY-CASCADES IN LANE COUNTY- UPPER HOOD RIVER VALLEY-SOUTH WASHINGTON CASCADES-WILLAPA HILLS- SOUTH WASHINGTON COAST-I-5 CORRIDOR IN COWLITZ COUNTY- GREATER VANCOUVER AREA-SOUTH WASHINGTON CASCADE FOOTHILLS- 505 AM PDT SAT JUN 5 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST OREGON AND SOUTHWEST WASHINGTON. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. FOR ADDITIONAL WEATHER INFORMATION...VISIT OUR WEB SITE AT WWW.WEATHER.GOV/PORTLAND
The national radar mosaic for the moment the first event began.
3 heavy rain, 1 debris flow. Local standard time, as filed.
The equipment at the Portland airport reported 1.28 inches of precipitation during a 12 hour period.
The equipment at the Hillsboro airport reported 1.32 inches of precipitation during a 12 hour period.
An observer reported 1.68 inches of precipitation over the area during a 12 hour period.
Heavy rainfall in the Portland area caused a landslide to occur on Highway 26 in Southwest Portland. Rainfall estimates of 1.5 inches in 24 hours were reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2010Every state in 2010This day in weather historyWarnings in Oregon, June 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: 246679, 246682, 246677, 242488.