Thunderstorms developed over parts of West Central Idaho and Baker County, Oregon causing flash flooding, including mudslides onto roads, over the area.
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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 BOI wrote it up.
Thunderstorms developed over parts of West Central Idaho and Baker County, Oregon causing flash flooding, including mudslides onto roads, over the area.
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 4, 8:05 AM PST, 1 hour 55 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BOISE ID 1005 AM MDT SAT JUN 4 2011 .DISCUSSION...WARMER TEMPERATURES ARE STILL ON TRACK FOR TODAY. THERE IS SOME POTENTIAL FOR TEMPERATURES TO BE EVEN A BIT HIGHER THAN OUR CURRENT FORECAST IN THE TREASURE VALLEY DUE TO DOWNSLOPE WARMING FROM SOUTHEAST WINDS. BUT THAT WILL BE OFFSET AS CLOUDS INCREASE FROM THE SOUTH THIS AFTERNOON. OUR CURRENT FORECAST FOR MAX TEMPS A LITTLE ABOVE GUIDANCE STILL LOOKS GOOD. NO UPDATES. && .AVIATION...VFR THROUGH SUNDAY. DEEP OFFSHORE LOW WILL DRIVE GUSTY EASTERLY WINDS ACROSS SE OREGON AND SW IDAHO TODAY...BECOMING MORE SOUTHERLY ON SUNDAY. SLIGHT CHANCE OF THUNDERSTORMS LATE SUNDAY OVER SE OREGON SW OF KBNO AND KREO...OTHERWISE SCATTERED CUMULUS BUILDUPS OVER THE MTNS. NEXT CHANCE FOR NON-VFR CONDITIONS IS MONDAY AFTERNOON OVER SE OREGON AND MONDAY NIGHT OVER SW IDAHO. && .PREV DISCUSSION... SHORT TERM...TODAY THROUGH SUNDAY...THE UPPER LEVEL CLOSED LOW REMAINS NEARLY STATIONARY OFF THE CALIFORNIA COAST KEEPING OUR AREA UNDER SOUTHERLY FLOW ALOFT WITH HIGH HEIGHTS AND LOW SURFACE PRESSURES. THIS PATTERN WILL BRING WARMER TEMPERATURES...WITH DAYTIME HIGHS 3 TO 6 DEGREES ABOVE NORMAL. MAX TEMPERATURES WILL DEPEND ON VARIABLE HIGH CLOUD COVER ASSOCIATED WITH THE OFFSHORE LOW...SO SOME LOCATIONS COULD BE WARMER THAN FORECAST BOTH TODAY AND SUNDAY. ALTHOUGH MOISTURE WILL BE LIMITED...STABILITY INDICES SUPPORT A SLIGHT CHANCE OF AFTERNOON THUNDERSTORMS ON SUNDAY... MAINLY IN HARNEY AND BAKER COUNTIES AND THE WEST CENTRAL IDAHO AND BOISE MOUNTAINS. LONG TERM...SUNDAY NIGHT THROUGH SATURDAY...QUITE WET LATE MONDAY THROUGH TUESDAY MORNING. AXIS OF GREATEST STORM TOTAL QPF IS EXPECTED TO BE AROUND ONE HALF AN INCH IN THE WEST CENTRAL MOUNTAINS...NW MALHEUR COUNTY TO THE STEENS. MILD CONDITIONS SUNDAY NIGHT WILL GIVE WAY TO A COOLING TREND BACK TO NEAR THEN BELOW NORMAL MONDAY NIGHT THROUGH SATURDAY. WARM RIDGE WILL STILL GIVE WAY TO THE PASSAGE OF A CLOSED UPPER LOW FROM SOUTH-CENTRAL CALIFORNIA MONDAY EVENING TO ACROSS SOUTHERN IDAHO LATE MONDAY. THIS IS A BIT SLOWER AND FURTHER SOUTH THAN PREVIOUS FORECASTS. EC/GFS/GEFS STILL KEEP COOL AND MOIST TROUGH OVER THE WEST NEXT WEEK. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...NONE. OR...NONE. && WEATHER.GOV/BOISE DISCUSSION...BW AVIATION.....DG PREV SHORT TERM...JT PREV LONG TERM....VM
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BOISE ID 612 AM MDT SAT JUN 4 2011 IDZ011>016-028>030-033-ORZ061>064-051215- 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- UPPER WEISER RIVER-HARNEY COUNTY-BAKER COUNTY-MALHEUR COUNTY- LOWER TREASURE VALLEY OR- 612 AM MDT SAT JUN 4 2011 /512 AM PDT SAT JUN 4 2011/ 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 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.
The Boise radar (KCBX), 161 km away, was scanning. The volume nearest the first event began at 17:59 UTC.
1 flash flood. Local standard time, as filed.
Local law enforcement reported heavy rain and flash flooding along Interstate 84 between Huntington and Baker City.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2011Every state in 2011This day in weather historyWarnings in Oregon, June 2011
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: 328325.