An upper level feature ahead of low pressure centered off the coast of California was responsible for strong to severe thunderstorm development over parts of Southeast Oregon.
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 BOI wrote it up.
An upper level feature ahead of low pressure centered off the coast of California was responsible for strong to severe thunderstorm development over parts of Southeast Oregon.
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 Boise, ID wrote its last area forecast discussion before the first event at Jun 3, 1:00 PM PST, 1 hour 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BOISE ID 300 PM MDT WED JUN 3 2009 .SHORT TERM...TONIGHT THROUGH FRIDAY...LATEST SURFACE OBS ARE INDICATING DEWPOINTS IN THE UPPER 40S AND LOWER 50S...ALONG WITH A PWAT OF ABOUT AN INCH...INDICATIVE OF A MOIST AND UNSTABLE ENVIRONMENT CONDUCIVE FOR THUNDERSTORMS. ALREADY SEEING ISOLATED CELLS NEAR THE NV BORDER AND AREAS TO THE NORTH OF THE TREASURE VALLEY. OF SOMEWHAT GREATER CONCERN IS THE POSSIBILITY OF STRONGER AND MORE ORGANIZED STORMS IN SOUTHEAST OREGON...MAINLY IN SOUTHWEST HARNEY COUNTY...WHICH IS ON THE LEADING EDGE OF HIGHER SHEAR WHICH EXTENDS INTO NORTHERN CALIF AHEAD OF THE PACIFIC UPPER LOW. THE GFS BRINGS MUCH DRIER/STABLE AIR FROM EAST-CENTRAL NV INTO SOUTHWEST IDAHO...WHICH SEEMS TO BE OVERDONE GIVEN THAT CONVECTION WAS ALREADY FIRING NEAR THE NV BORDER. THUS...THE NAM IS PREFERRED THROUGH THE SHORT TERM. EXPECT SHOWER/THUNDERSTORM THREAT TO INCREASE THROUGH FRIDAY AS THE UPPER LOW CONTINUES TO MOVE CLOSER TO THE REGION. MOST OF THE ACTIVITY WILL OCCUR DURING THE DAYLIGHT HOURS AS DAYTIME HEATING ACTS UPON THE UNSTABLE ATMOSPHERE...BUT DISTURBANCES ROTATING AROUND THE UPPER LOW COULD ENHANCE THE CONVECTION EVEN AT NIGHT. TEMPERATURES WILL BE COOLER ON FRIDAY IN ANTICIPATION OF MORE CLOUDS AND SHOWERS. .LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY...UPPER LEVEL LOW SLOWLY MOVES INLAND OVER CA EJECTING A PIECE OF ENERGY NORTHEAST OVER THE CWA FRIDAY NIGHT INTO SATURDAY. THIS ENERGY WILL COMBINE WITH ENERGY DROPPING SOUTH OUT OF CANADA SETTING UP WHAT COULD BE A SIGNIFICANT RAIN EVENT OVER THE AREA ON SATURDAY. HAVE CONTINUED TREND OF RAISING POPS...BRINGING POPS ACROSS THE CWA TO HIGH END CHANCE UP TO LIKELY. HAVE INCREASED QPF ON SATURDAY AS WELL...BUT HAVE NOT GONE AS HIGH AS SOME MODELS ARE SUGGESTING BECAUSE THE TIMING ON THIS TROUGH HAS BEEN CONTINUALLY SLOWING DAY TO DAY. IF IT SLOWS FURTHER...SUNDAY WILL END UP BEING THE WETTER DAY INSTEAD OF SATURDAY. HOWEVER...AS MODELS ARE HANDLING THE SOLUTION RIGHT NOW...HAVE STARTED TO DRY OUT THE FORECAST SUNDAY NIGHT INTO MONDAY AS THE TROUGH MOVES EASTWARD AND THE CWA IS ON THE BACKSIDE OF THE TROUGH. THIS WILL RESULT IN A DRIER NORTHWEST FLOW ACROSS THE AREA. TEMPERATURES WILL BE ABOUT 10 DEGREES BELOW NORMAL FOR THE WEEKEND WITH CLOUDS AND PRECIPITATION LIMITING HEATING. MODELS ARE SUGGESTING MULTIPLE SHORTWAVES MOVING THROUGH A BROAD SCALE WESTERN TROUGH TUESDAY INTO WEDNESDAY...BUT THIS PATTERN IS ATYPICAL THIS TIME OF YEAR. FOR NOW HAVE TRENDED TEMPS AND POPS CLOSE TO CLIMATOLOGY TUESDAY INTO WEDNESDAY. && .AVIATION...SHOWERS AND THUNDERSTORMS CAN BE EXPECTED THROUGH ERN ORE...SRN ID...AND THE MOUNTAINS OF CNTRL ID THIS AFTERNOON AND EVENING. THE GREATEST STORM THREAT IS PERIODS OF MODERATE TO HEAVY RAIN BRINGING MVFR CONDITIONS. STORM TOPS WILL BE 30-40 KFT MSL. STORMS WILL PRODUCE WIND GUSTS UP TO 25 KTS...OTHERWISE WINDS WILL BE LIGHT SURFACE AND ALOFT. && .HYDROLOGY...IN THE BOISE RIVER BASIN...RESERVOIRS ARE NEARLY FULL AND INFLOWS REMAIN HIGH. REGULATED DISCHARGE BELOW LUCKY PEAK WILL CONTINUE TO RESULT IN FLOWS NEAR 5200 CFS AND A RIVER STAGE NEAR 9.25 FEET AT GLENWOOD BRIDGE FOR THE NEXT SEVERAL DAYS. AT THESE LEVELS...WATER WILL ENCROACH ON THE GREENBELT PATH WHERE IT CROSSES UNDER PARKCENTER AND GLENWOOD BRIDGES. IN SPITE OF THE INCREASED FLOWS...THE RIVER IS EXPECTED TO REMAIN WELL BELOW THE OFFICIAL FLOOD STAGE WHICH IS EQUAL TO A FLOW 7000 CUBIC FEET PER SECOND OR A STAGE OF 10.4 FEET WHEN MEASURED AT GLENWOOD BRIDGE GAGE. SOME DECREASE IS RESERVOIR INFLOW IS LIKELY BY EARLY NEXT WEEK. SEE THE LATEST RIVER STATEMENT FOR MORE DETAILS. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...NONE. OR...NONE. && WEATHER.GOV/BOISE SHORT TERM...BW LONG TERM....DF AVIATION.....DF HYDROLOGY....JB
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BOISE ID 335 AM MDT WED JUN 3 2009 IDZ011>016-028>030-ORZ061>064-040945- WEST CENTRAL MOUNTAINS-LOWER TREASURE VALLEY ID-BOISE MOUNTAINS- UPPER TREASURE VALLEY-SOUTHWEST HIGHLANDS-WESTERN MAGIC VALLEY- CAMAS PRAIRIE-OWYHEE MOUNTAINS-SOUTHERN TWIN FALLS COUNTY- HARNEY COUNTY-BAKER COUNTY-MALHEUR COUNTY- LOWER TREASURE VALLEY OR- 335 AM MDT WED JUN 3 2009 /235 AM PDT WED JUN 3 2009/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL IDAHO...SOUTHWEST IDAHO...WEST CENTRAL IDAHO...NORTHEAST OREGON AND SOUTHEAST OREGON. .DAY ONE...TODAY AND TONIGHT SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS WITH LOCAL HEAVY RAINS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SCATTERED SHOWERS AND AFTERNOON AND EVENING THUNDERSTORMS EACH DAY WITH LOCAL HEAVY RAINS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHJER CONDITIONS ACCORDING TO STANDARD OPERATING PREOCEDURES.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
348 PM MDT WED JUN 3 2009
IDZ015-032215-
OWYHEE ID-
348 PM MDT WED JUN 3 2009
THE NATIONAL WEATHER SERVICE IN BOISE HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
SOUTH CENTRAL OWYHEE COUNTY IN SOUTHWEST IDAHO...
UNTIL 415 PM MDT.
AT 346 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 22 MILES NORTHEAST OF OWYHEE..MOVING NORTHEAST AT
10 MPH.
HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM...ALONG
WITH HEAVY RAIN.
THE THUNDERSTORM WILL BE NEAR...
BLACK STONE MOUNTAIN AROUND 350 PM MDT...
BLACK ROCK MOUNTAIN...SEVY FALLS...BRUNEAU RIVER LAUNCH SITE AND
POISON BUTTE AROUND 415 PM MDT.
LAT...LON 4242 11556 4214 11539 4206 11579 4225 11589
TIME...MOT...LOC 2148Z 239DEG 7KT 4217 11578
MTSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BOISE ID 431 PM MDT WED JUN 3 2009 ORZ061-063-032315- HARNEY OR-MALHEUR OR- 331 PM PDT WED JUN 3 2009 THE NATIONAL WEATHER SERVICE IN BOISE HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... SOUTHEASTERN HARNEY COUNTY IN SOUTHEAST OREGON... AND SOUTHWESTERN MALHEUR COUNTY IN SOUTHEAST OREGON... UNTIL 415 PM PDT. AT 331 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 23 MILES EAST OF FIELDS...MOVING NORTH AT 10 MPH. HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. THE THUNDERSTORM WILL BE NEAR... WHITEHORSE RANCH AROUND 335 PM PDT... TWIN BUTTES AROUND 415 PM PDT. LAT...LON 4260 11835 4256 11799 4227 11811 4232 11837 TIME...MOT...LOC 2231Z 194DEG 11KT 4236 11823 MT
The Elko radar (KLRX), 209 km away, was scanning. The volume nearest the first event began at 22:49 UTC.
2 hail. Local standard time, as filed.
A trained spotter near White Horse Ranch in southern Harney County, Oregon reported golf ball sized hail.
A resident at Fields, Oregon reported hail the size of an ice cube out of an ice cube tray.
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: 178952, 178957.