Gusty winds caused damage to a shed in Salmon, ID.
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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.
Gusty winds caused damage to a shed in Salmon, ID.
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 May 11, 12:58 PM MST, 1 hour 7 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 158 PM MDT SUN MAY 11 2008 .DISCUSSION...THE SHOWERY...COOL WEATHER WILL CONTINUE OVER NW MT AND NORTH CENTRAL IDAHO THROUGH EARLY MONDAY AS A SLOW MOVING UPPER TROUGH MOVES SOUTHEAST ALONG THE CONTINENTAL DIVIDE. A COOL NORTHERLY FLOW WILL DEVELOP ON MONDAY. THIS WILL ALLOW FOR TEMPERATURES TO REMAIN 5 TO 10 DEGREES BELOW NORMAL. TEMPERATURES WILL REMAIN SLIGHTLY BELOW NORMAL ON TUESDAY AS A WEAK WAVE MOVES OVER THE RIDGE (LOCATED ALONG THE COAST) AND INTO THE AREA. SHOWER ACTIVITY WILL BE ON THE INCREASE DURING THE AFTERNOON. RIGHT NOW IT APPEARS THAT THIS WEAK SYSTEM WILL EXIT THE AREA EARLY WEDNESDAY MORNING. ON WEDNESDAY...A STRONG RIDGE OF HIGH PRESSURE TO THE WEST WILL BEGIN TO MOVE INLAND AND WILL CREATE A DRAMATIC CHANGE IN THE OVERALL WEATHER PATTERN. A SIGNIFICANT RIDGE OF HIGH PRESSURE WILL BUILD OVER THE REGION FOR THE REMAINDER OF THE WORK WEEK INTO THE WEEKEND. TEMPERATURES WILL RISE TO BE SIGNIFICANTLY ABOVE NORMAL THROUGH THE WEEKEND. THE HIGH TEMPERATURES ARE EXPECTED TO CAUSE SIGNIFICANT SNOW MELT IN THE MOUNTAINS. PLEASE SEE HYDROLOGIC DISCUSSION BELOW. THE MODELS ARE INDICATING ANOTHER SYSTEM WILL MAKE ITS WAY INTO THE NORTHERN ROCKIES BY EARLY NEXT WEEK...BUT CONFIDENCE IS LOW FOR THIS SOLUTION. SINCE MODELS TYPICALLY BREAK DOWN RIDGES TO QUICKLY. && .AVIATION...A PASSING UPPER LEVEL TROUGH WILL ALLOW FOR THE SCATTERED SHOWER ACTIVITY TO CONTINUE MAINLY OVER THE MOUNTAINS THROUGH MONDAY MORNING. MOUNTAINS AND PASSES MY BE OBSCURED AT TIMES BY CLOUDS AND PRECIPITATION. && .HYDROLOGY...COOLER TEMPERATURES HAVE ALLOWED FOR MOST OF THE RIVER AND STREAM RISES TO LEVEL OFF. THIS TREND IS EXPECTED TO CONTINUE UNTIL MID WEEK. BY WEEKS END A WARMING TREND WILL ALLOW FOR SIGNIFICANT STREAM RISES TO BEGIN OCCURRING ONCE AGAIN. SOME STREAM FLOODING MAY BE POSSIBLE BEGINNING NEXT WEEKEND. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...NONE. ID...NONE. && SHORT TERM...HENRY LONG TERM....SMITH AVIATION...HENRY
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
A downburst wind from a rain shower coupled with a strong pressure gradient, produced an estimated wind gust to 60 mph. One small aluminum shed was blown to over 20 feet into the air and damaged.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2008Every state in 2008This day in weather historyWarnings in Idaho, May 2008
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: 95375.