An upper level low pressure area near the southwest Oregon Coast brought abundant moisture and unstable conditions.
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 PDT wrote it up.
An upper level low pressure area near the southwest Oregon Coast brought abundant moisture and unstable conditions.
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 Pendleton, OR wrote its last area forecast discussion before the first event at Jun 12, 2:25 PM PST, 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PENDLETON OR 325 PM PDT FRI JUN 12 2009 UPDATED AVIATION DISCUSSION .SHORT TERM...TONIGHT THROUGH MONDAY...WEAK UPPER LOW OFF THE SW ORE COAST WILL MEANDER VERY LITTLE OVER THE NEXT FEW DAYS. THIS WILL MAINTAIN A PERSISTENT MOIST...SOMEWHAT UNSTABLE PATTERN OVER THE REGION THROUGH MONDAY. DIURNALLY ENHANCED SHOWERS AND THUNDERSTORMS CAN BE EXPECTED EACH OF THE NEXT THREE DAYS WITH THE MAIN EMPHASIS SHIFTING TO SOUTHERN AND EASTERN AREAS WITH EACH PASSING DAY. LOCALLY HEAVY RAIN IS A THREAT WITH ANY OF THE STORMS GIVEN VERY LIGHT TROPOSPHERIC STEERING FLOW. SOME 1/4 TO 1/2 INCH HAIL IS ALSO A POSSIBILITY DURING THE AFTERNOON AND EARLY EVENING BUT THE PATTERN WONT BE CONDUCIVE TO MUCH MORE THAN THAT. CONSIDERED THE NEED FOR A FLASH FLOOD WATCH FOR SATURDAY BUT SETUP DOES NOT LOOK FAVORABLE FOR WIDESPREAD FLASH FLOODING. THIS SITUATION WILL NEED TO BE MONITORED HOWEVER BECAUSE SOME URBAN/SMALL STREAM FLOODING IS LIKELY AT SOME POINT WITH THIS SYSTEM GIVEN THE PERSISTENT RAINS. TEMPERATURES THROUGH THE PERIOD WILL BE NEAR SEASONAL NORMS. 78 .LONG TERM...MONDAY NIGHT THROUGH FRIDAY...MODELS ARE IN REASONABLE AGREEMENT WITH A LOW PRESSURE SYSTEM DROPPING SOUTH INTO CENTRAL CALIFORNIA AT THE START OF THE WEEK. THIS WILL KEEP MOST OF THE REGION IN A DRIER SPLIT FLOW...HOWEVER A DISTURBANCE MAY ROTATE NORTHWARD...BRINGING A CHANCE OF PRECIPITATION AND STORMS TO NORTHEAST OREGON THROUGH THE MIDDLE OF THE WEEK. ON WEDNESDAY...THE LOW WILL DROP FURTHER SOUTH AND THE AREA WILL BE UNDER A WESTERLY TO NORTHWESTERLY FLOW. THE MODELS BEGIN TO DIFFER AT THIS POINT...WITH THE GFS KEEPING A WEAK TROUGH TO THE NORTH AND A RIDGE OUT IN THE EASTERN PACIFIC. THE EUROPEAN MODEL BRINGS A STRONGER TROUGH THROUGH THE PACIFIC NORTHWEST AND KEEPS THE RIDGE OF HIGH PRESSURE IN THE EAST PACIFIC. WITH UNCERTAINTY IN THE TROUGH STRENGTH...HAVE KEPT A SLIGHT CHANCE OF SHOWERS FOR THE NORTHEAST OREGON MOUNTAINS AND ALONG THE WASHINGTON CASCADES THROUGH THE END OF THE WEEK AS DISTURBANCES PASS THROUGH THE FLOW. DMH && .AVIATION...00Z TAFS...SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE REGION THIS AFTERNOON. THESE STORMS WILL BE IN THE VICINITY OF KALW...KPDT AND KRDM. A FEW SHOWERS MAY AFFECT KPSC AND KYKM THIS EVENING AS STORMS DRIFT NORTHWARD INTO THE COLUMBIA BASIN. THE STRONGER STORMS IN CENTRAL OREGON...NORTHEAST OREGON AND NEAR THE WASHINGTON CASCADES WILL SEE HEAVY RAIN...SMALL HAIL AND GUSTY WINDS. MVFR CONDITIONS ARE POSSIBLE AS CEILINGS LOWER TEMPORARILY UNDER THE HEAVIER SHOWERS THIS EVENING. STORMS WILL DISSIPATE AFTER SUNSET WITH SOME SHOWERS LINGERING TONIGHT. SURFACE WINDS WILL BE UNDER 15 KTS EXCEPT NEAR THUNDERSTORMS. DMH && .PRELIMINARY POINT TEMPS/POPS... PDT 55 81 59 78 / 40 30 40 30 ALW 59 83 60 81 / 40 30 40 30 PSC 59 88 61 86 / 20 20 30 20 YKM 58 83 59 82 / 20 20 30 10 HRI 56 85 61 83 / 30 20 40 20 ELN 57 84 59 82 / 20 20 30 10 RDM 47 74 50 73 / 60 60 60 30 LGD 50 75 55 72 / 60 50 60 40 GCD 48 72 52 71 / 60 60 60 40 DLS 60 83 61 80 / 40 30 40 20 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...NONE. WA...NONE. && THREAT INDEX SATURDAY : GREEN SUNDAY : GREEN MONDAY : GREEN GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES. YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT. RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT. FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT... WWW.WEATHER.GOV/PENDLETON 78/84/84
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
604 AM PDT FRI JUN 12 2009
ORZ041>044-049-050-501>506-WAZ024-026>030-501-502-131245-
EASTERN COLUMBIA RIVER GORGE OF OREGON-NORTH CENTRAL OREGON-
CENTRAL OREGON-LOWER COLUMBIA BASIN OF OREGON-GRANDE RONDE VALLEY-
WALLOWA COUNTY-FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON-
NORTHERN BLUE MOUNTAINS OF OREGON-
SOUTHERN BLUE MOUNTAINS OF OREGON-
NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES-JOHN DAY BASIN-
OCHOCO-JOHN DAY HIGHLANDS-
EASTERN COLUMBIA RIVER GORGE OF WASHINGTON-KITTITAS VALLEY-
YAKIMA VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON-
FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON-
NORTHWEST BLUE MOUNTAINS-
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON-
EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON-
604 AM PDT FRI JUN 12 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.
.DAY ONE...TODAY AND TONIGHT
HEAVY RAIN
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
OF THE SOUTHERN CASCADES OF WASHINGTON, EASTERN COLUMBIA RIVER
GORGE OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS OF
WASHINGTON, NORTHWEST BLUE MOUNTAINS, EASTERN COLUMBIA RIVER
GORGE OF OREGON, NORTH CENTRAL OREGON, CENTRAL OREGON, GRANDE
RONDE VALLEY, WALLOWA COUNTY, FOOTHILLS OF THE BLUE MOUNTAINS
OF OREGON, NORTHERN BLUE MOUNTAINS OF OREGON, SOUTHERN BLUE
MOUNTAINS OF OREGON, NORTHERN WHEELER AND SOUTHERN GILLIAM
COUNTIES, JOHN DAY BASIN, OCHOCO-JOHN DAY HIGHLANDS
THUNDERSTORMS
KITTITAS VALLEY, YAKIMA VALLEY, LOWER COLUMBIA BASIN OF
WASHINGTON, LOWER COLUMBIA BASIN OF OREGON, WALLOWA COUNTY
A PERSISTENT MOIST AND UNSTABLE FLOW ALOFT WILL RESULT IN DAILY
DEVELOPMENT OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS.
SOME OF THE STORMS MAY PRODUCE LOCALLY HEAVY RAINFALL AMOUNTS WHICH
MAY LEAD TO RISING WATER LEVELS ON SMALL RIVERS AND STREAMS.
ADDITIONALLY, URBAN FLOODING IS POSSIBLE, PARTICULARLY ACROSS
CENTRAL OREGON. PERSONS LIVING OR TRAVELING NEAR RIVERS AND STREAMS
ARE URGED TO KEEP ALERT TO THE LATEST WEATHER STATEMENTS FROM THE
NATIONAL WEATHER SERVICE AND FOR POSSIBLE RAPID RISES OF WATER
LEVELS AS WELL AS ACROSS ROADWAYS, UNDERPASSES, AND DRY STREAM BEDS.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
HEAVY RAIN SATURDAY
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
OF THE SOUTHERN CASCADES OF WASHINGTON, EASTERN COLUMBIA RIVER
GORGE OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS OF
WASHINGTON, NORTHWEST BLUE MOUNTAINS, EASTERN COLUMBIA RIVER
GORGE OF OREGON, NORTH CENTRAL OREGON, CENTRAL OREGON, GRANDE
RONDE VALLEY, WALLOWA COUNTY, FOOTHILLS OF THE BLUE MOUNTAINS
OF OREGON, NORTHERN BLUE MOUNTAINS OF OREGON, SOUTHERN BLUE
MOUNTAINS OF OREGON, NORTHERN WHEELER AND SOUTHERN GILLIAM
COUNTIES, JOHN DAY BASIN, OCHOCO-JOHN DAY HIGHLANDS
THUNDERSTORMS SATURDAY
KITTITAS VALLEY, YAKIMA VALLEY, LOWER COLUMBIA BASIN OF
WASHINGTON, LOWER COLUMBIA BASIN OF OREGON, WALLOWA COUNTY
THUNDERSTORMS SUNDAY
LOWER COLUMBIA BASIN OF WASHINGTON, FOOTHILLS OF THE BLUE
MOUNTAINS OF WASHINGTON, NORTHWEST BLUE MOUNTAINS, NORTH
CENTRAL OREGON, CENTRAL OREGON, LOWER COLUMBIA BASIN OF
OREGON, GRANDE RONDE VALLEY, WALLOWA COUNTY, FOOTHILLS OF THE
BLUE MOUNTAINS OF OREGON, NORTHERN BLUE MOUNTAINS OF OREGON,
SOUTHERN BLUE MOUNTAINS OF OREGON, NORTHERN WHEELER AND
SOUTHERN GILLIAM COUNTIES, JOHN DAY BASIN, OCHOCO-JOHN DAY
HIGHLANDS
THUNDERSTORMS MONDAY
NORTHWEST BLUE MOUNTAINS, GRANDE RONDE VALLEY, WALLOWA COUNTY,
NORTHERN BLUE MOUNTAINS OF OREGON, SOUTHERN BLUE MOUNTAINS OF
OREGON, JOHN DAY BASIN, OCHOCO-JOHN DAY HIGHLANDS
THUNDERSTORMS TUESDAY
GRANDE RONDE VALLEY, WALLOWA COUNTY
CONTINUED THUNDERSTORMS WILL OCCUR MAINLY DURING THE AFTERNOON AND
EVENING PERIODS. STORMS WILL BE SLOW MOVING WITH LOCALLY INTENSE
RAINFALL POSSIBLE. STORMS ON SATURDAY HAVE HIGHEST POTENTIAL TO
RESULT IN URBAN STREET FLOODING, FLASH FLOODING OF STREAMS AND
WASHES, OR DEBRIS FLOWS. AREAS MOST SUSCEPTIBLE ON SATURDAY WILL BE
THOSE WHERE HEAVY RAINFALL IS RECEIVED TODAY. ADDITIONALLY, SMALL
HAIL AND FREQUENT LIGHTNING IS POSSIBLE EACH DAY. PLEASE CONTINUE TO
MONITOR THE LATEST PRODUCTS FROM THE NATIONAL WEATHER SERVICE OR
YOUR LOCAL MEDIA OUTLET AS STATEMENTS ARE ISSUED.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED.
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
GRAPHICAL FORECASTS OF WEATHER HAZARDS OUT TO SEVEN DAYS
ARE DISPLAYED ON THE WORLD WIDE WEB AT:
WWW.WRH.NOAA.GOV/PDT/CURRENTHAZARDS/HWO.HTML
ALL LETTERS IN THE ABOVE URL ARE LOWER CASE...EXCEPT THE H IN
CURRENTHAZARDS.PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
258 PM PDT FRI JUN 12 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1223 PM HAIL 12 SE DAYTON 46.19N 117.80W
06/12/2009 E0.50 INCH COLUMBIA WA PUBLIC
MARBLE SIZE HAIL REPORTED JUST SOUTHEAST OF DAYTON.
&&
DWEBERThe national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
Rainfall rates of 1/4 inch in 5 minutes with a total of 1.30 inches.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2009Every state in 2009This day in weather historyWarnings in Oregon, June 2009
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: 164985.