Yet another abnormally moist Pacific weather system brought heavy rain to portions of Idaho County. Rainfall rates nearing an inch per hour were recorded with this system.
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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 MSO wrote it up.
Yet another abnormally moist Pacific weather system brought heavy rain to portions of Idaho County. Rainfall rates nearing an inch per hour were recorded with this system. Flash flooding occured washing out area roads.
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 Missoula, MT wrote its last area forecast discussion before the first event at Jun 7, 8:16 AM PST, 44 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 1016 AM MDT MON JUN 7 2010 .UPDATE... FLOOD HIGHLIGHTS HAVE BEEN CANCELLED FOR IDAHO COUNTY. POPS AND QPF HAVE BEEN INCREASED FOR THE REMAINDER OF TODAY. && .DISCUSSION... BASED ON DIMINISHING RADAR RETURNS AND RIVER FLOWS SLOWLY DECREASING THIS MORNING...FLOOD HIGHLIGHTS HAVE BEEN CANCELLED FOR IDAHO COUNTY. AN UNSTABLE ATMOSPHERE AND HIGH ATMOSPHERIC MOISTURE CONTENT WILL REMAIN OVER NORTHERN IDAHO AND EXTREME NORTHWEST MONTANA DURING THE REMAINDER OF TODAY. CONSIDERING MUCH OF THE GROUND HAS ALREADY BEEN SATURATED OVER THIS AREA FROM RECENT PRECIPITATION...A SUDDEN BURST OF PRECIPITATION FROM THUNDERSTORM CELLS MAY CAUSE AREA STREAMFLOW TO SUDDENLY SPIKE. THIS SCENARIO WILL CONTINUE TO BE MONITORED. && .AVIATION...RAIN WILL CONTINUE TO AFFECT KSMN AND KBTM THROUGH THE DAY AS REMNANTS OF THE ONGOING WEATHER SYSTEM KEEP MOISTURE ACROSS SOUTHWEST MONTANA AND CENTRAL IDAHO. TEMPORARILY LOWERED CEILINGS CAN CONTINUE TO BE EXPECTED IN AREAS OF HEAVIEST RAIN SHOWERS FOR THESE TERMINALS THROUGH THIS AFTERNOON. ELSEWHERE...SCATTERED RAIN SHOWERS WILL BE A FEATURE BUT A RIDGE OF HIGH PRESSURE WILL BEGIN TO BUILD FROM THE WEST LATER TONIGHT AND START A GENERAL DRYING TREND WITH IMPROVING CONDITIONS FOR ALL TERMINALS. && HYDROLOGY...MOST RIVER LEVELS ACROSS THE WATCH AREA HAVE BEGUN TO RECEDE. THE THREAT OF LONG TERM RIVER RISES HAS DIMINISHED AT THIS TIME. HOWEVER...CONSIDERING THAT THE ATMOSPHERE IS EXPECTED TO REMAIN MOIST AND UNSTABLE OVER CLEARWATER COUNTY IN IDAHO TODAY...SUDDEN BURSTS OF RAIN FROM THUNDERSTORMS MAY CAUSE FLOW IN SMALL STREAMS TO RESPOND RAPIDLY. THIS SCENARIO WILL CONTINUE TO BE MONITORED THROUGHOUT TODAY FOR FLOOD POTENTIAL. && .PREV DISCUSSION... /ISSUED 352 AM MDT MON JUN 7 2010/ DISCUSSION...SCATTERED RAIN SHOWERS WILL CONTINUE FOR PARTS OF WEST CENTRAL AND SOUTHWEST MONTANA THROUGH THIS MORNING AS THE MOST RECENT WEATHER SYSTEM CONTINUES ITS EXIT TO THE EAST THROUGHOUT THE DAY. PARTIALLY CLEARING SKIES ACROSS NORTHWEST MONTANA OVERNIGHT HAVE LEAD TO THE DEVELOPMENT OF PATCHY FOG IN MANY OF THE VALLEYS...BUT IS EXPECTED TO BE RATHER SHORT-LIVED AND SPOTTY IN NATURE. AS THE DAY WEARS ON...REDEVELOPMENT OF ENERGY ACROSS CENTRAL IDAHO AND SOUTHWEST MONTANA WILL OCCUR THIS AFTERNOON AND ONCE AGAIN KEEP RAIN FALLING OVER THESE AREAS THROUGH THIS EVENING. RAINFALL AMOUNTS SHOULD BE MUCH LIGHTER IN COMPARISON TO WHAT HAS RECENTLY BEEN EXPERIENCED. THE GOOD NEWS IS THAT CONDITIONS WILL STEADILY BEGIN TO DRY OVERNIGHT MONDAY INTO TUESDAY AS A RIDGE OF HIGH PRESSURE BUILDS ACROSS THE NORTHERN ROCKIES. A FAIRLY PLEASANT DAY IS IN STORE FOR TUESDAY...WITH AFTERNOON TEMPERATURES WARMING INTO THE LOW TO MID 70S ACROSS THE FORECAST AREA. THE BAD NEWS IS THAT TUESDAY SHOULD BE THE ONLY DAY WE SEE THIS...AT LEAST IN THE SHORT TERM. THE RIDGE IS EXPECTED TO SHIFT TO THE EAST TUESDAY NIGHT AS THE NEXT WEATHER SYSTEM QUICKLY REPLACES IT. FORECAST MODELS REMAIN QUITE CONSISTENT WITH THE DEVELOPMENT OF YET ANOTHER UPPER LEVEL STORM SYSTEM. THIS LAST LOW APPEARS TO BE MUCH SLOWER AS IT WRAPS UP INTO A CLOSED AREA OF LOW PRESSURE AND SLOWLY TRAVERSES THE PACIFIC NORTHWEST AND NORTHERN ROCKIES. BUT AS HAS BEEN THE CASE OVER THE PAST FEW WEEKS...THIS STORM TOO WILL POSSESS WELL ABOVE NORMAL LEVELS OF ATMOSPHERIC MOISTURE AND SHOULD BRING ONE FINAL GOOD SOAK TO CENTRAL IDAHO AND WESTERN MONTANA. THE FOCUS OF BEST CHANCES FOR HEAVIEST PRECIPITATION HAS NARROWED DOWN TO WEDNESDAY AFTERNOON AS A FAIRLY ROBUST COLD FRONT MOVES ACROSS THE REGION. BELIEVE ALL LOCATIONS WILL AT LEAST SEE MEASURABLE RAINFALL AND THUS HAVE RAISED POPS TO NEAR 100%. IN ADDITION...WITH PLENTY OF UPPER LEVEL SUPPORT AIDED BY THE PRESENCE OF A NEAR 100KT JET...ANTICIPATE THE POTENTIAL FOR STRONG THUNDERSTORMS AND AT TIMES...VERY HEAVY RAINFALL. EVEN AFTER THE COLD FRONT MOVES THROUGH...WIDESPREAD CONVECTIVE SHOWERS WILL REMAIN IN THE FORECAST THROUGH THURSDAY AND INTO FRIDAY WHEN THE LOW FINALLY MOVES INTO EASTERN MONTANA AND EVENTUALLY THE DAKOTAS. THE BIGGEST QUESTION THAT REMAINS IS THE FINAL TRAJECTORY OF THIS CLOSED LOW. RIGHT NOW IT APPEARS TO MOVE ALONG THE US/CANADIAN BORDER WHICH WOULD KEEP MUCH OF THE STRATIFORM PRECIPITATION OVER BRITISH COLUMBIA AND SASKATCHEWAN. HOWEVER IF THE LOW DRIFTS A LITTLE BIT FARTHER TO THE SOUTH SOME LOCATIONS ALONG THE CANADIAN BORDER COULD SEE PROLONGED PERIODS OF LIGHT TO MODERATE RAINFALL. ADDING FURTHER COMPLICATION TO THE MIX IS THE LATEST RUN OF THE ECMWF WHICH CUTS THIS LOW OFF FROM THE UPPER LEVEL JET STREAM...LEAVING IT TO MEANDER SOUTHWARD INTO THE GREAT BASIN AND PERSIST OVER THE WESTERN UNITED STATES INTO THE WEEKEND AND POSSIBLY NEXT WEEK! THIS IS A NEW SOLUTION...GIVEN THE GFS AND PREVIOUS ECMWF MODELS SHOWED A BUILDING RIDGE OVER THE REGION THIS WEEKEND. THUS WILL APPROACH IT WITH CAUTION AND NOT RAISE TEMPERATURES TOO MUCH FOR THE WEEKEND AS MUCH UNCERTAINTY STILL EXISTS. AVIATION...RAIN WILL CONTINUE TO AFFECT KSMN AND KBTM THROUGH THE DAY AS REMNANTS OF THE ONGOING WEATHER SYSTEM KEEP MOISTURE ACROSS SOUTHWEST MONTANA AND CENTRAL IDAHO. TEMPORARILY LOWERED CEILINGS CAN CONTINUE TO BE EXPECTED IN AREAS OF HEAVIEST RAIN SHOWERS FOR THESE TERMINALS THROUGH THIS AFTERNOON. ELSEWHERE...SCATTERED RAIN SHOWERS WILL BE A FEATURE BUT A RIDGE OF HIGH PRESSURE WILL BEGIN TO BUILD FROM THE WEST LATER TONIGHT AND START A GENERAL DRYING TREND WITH IMPROVING CONDITIONS FOR ALL TERMINALS. HYDROLOGY...MOST RIVER LEVELS ACROSS THE WATCH AREA HAVE BEGUN TO RECEDE SAVE ONLY FOR THE LITTLE SALMON RIVER NEAR RIGGINS...WHICH HAS STEADILY INCREASED THROUGHOUT THE NIGHT AND INTO THIS MORNING. SHOWERS CONTINUE ACROSS CENTRAL IDAHO BUT SHOULD CONTRIBUTE ONLY SLIGHTLY TO THE RIVER RISE. THOUGHTS ARE THAT ANY RISES WILL BE DELAYED RESPONSE TO YESTERDAYS ADDED RAINFALL. WILL CONTINUE TO KEEP IDAHO COUNTY IN A WATCH TO ACCOUNT FOR THIS SLOW RESPONSE AND THE INCREASE BEING SEEN IN THE LEVELS. ELSEWHERE THE WATCH HAS BEEN DROPPED EARLY AS THE THREAT FOR FLOODING SEEMS MINIMAL. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...NONE. ID...NONE. && UPDATE...ZUMPFE SHORT TERM/AVIATION/HYDROLOGY...ALLEGRETTO LONG TERM....DICKERSON
The Missoula radar (KMSX), 184 km away, was scanning. The volume nearest the first event began at 16:58 UTC.
1 flash flood. Local standard time, as filed.
Heavy rain fall rates of 0.60 inches in an hour fell near Kooskia, Idaho. This caused a culvert to be washed out along Battle Ridge Road. Flash flooding also caused the closure of State Highway 13 between Harpster and Kooskia.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2010Every state in 2010This day in weather historyWarnings in Idaho, 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: 242357.