Isolated thunderstorm development occured over South Central Idaho on the 15th as a low pressure system remained off the California coast.
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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.
Isolated thunderstorm development occured over South Central Idaho on the 15th as a low pressure system remained off the California coast.
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 Aug 15, 7:57 PM MST, 1 hour 48 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BOISE ID 857 PM MDT SUN AUG 15 2010 .DISCUSSION...ISOLATED THUNDERSTORMS FORMED LATE AFTERNOON AND EVENING ALONG THE OREGON/NEVADA BORDER DUE TO A WEAK UPPER LOW IN NRN CALIF. LOW WAS BEST SEEN ON WATER VAPOR SAPIX. IT WAS MOVING SLOWLY EWD AND SPREADING CONVECTIVE CLOUDS INTO EXTREME SWRN IDAHO THIS EVENING. THUNDERSTORMS SHOULD END 03Z-06Z TONIGHT WITH LOSS OF DAYTIME HEATING. BY THE TIME HEATING RETURNS...MONDAY AFTERNOON...THE REMAINS OF THE WEAK LOW WILL BE NEAR THE NV/UT NRN BORDER AND ONLY SRN TWIN FALLS COUNTY WILL HAVE ANY CHANCE OF THUNDER. OUR REMAINING ZONES NEAR THE NEVADA BORDER WILL BE SUNNY. THERE WILL ALSO BE ENOUGH INSTABILITY MONDAY AFTERNOON FOR A SLIGHT CHANCE OF THUNDERSTORMS IN THE CENTRAL IDAHO MOUNTAINS. NEXT UPPER LOW OUT IN THE PACIFIC 40W/132N IS STRONGER. THAT LOW IS PROGGED ENEWD ACROSS OUR OREGON ZONES EARLY WEDNESDAY AND THE NRN 2/3 OF OUR ENTIRE CWA WEDNESDAY AND WEDNESDAY NIGHT. FIRE WX FORECASTER EXPRESSED CONCERN ABOUT POSSIBLE LIGHTNING IN HARNEY COUNTY AS EARLY AS TUESDAY AFTERNOON...BUT NEWEST PROGS SAY THE MAIN LIGHTNING THREAT WILL COME TUESDAY NIGHT AND ESPECIALLY WEDNESDAY. FORECASTS MAY NEED MORE THUNDERSTORMS WEDNESDAY...BUT UNTIL THEN CURRENT FORECASTS LOOK GOOD. WE STILL THINK TUESDAY WILL BE OUR HOTTEST DAY...3-5F HOTTER THAN MOS. && .AVIATION...VFR. ISOLATED THUNDERSTORMS NEAR THE NEVADA BORDER THIS EVENING WILL DISSIPATE BY 06Z...THEN RE-FORM AFTER 21Z MONDAY... MAINLY OVER HIGHER TERRAIN SOUTH OF THE SNAKE RIVER VALLEY AND OVER THE WEST CENTRAL IDAHO AND BOISE MOUNTAINS. SURFACE WINDS WILL BE VARIABLE AND MOSTLY LIGHT THROUGH MONDAY MORNING...THEN LIGHT NORTHWEST AFTER 18Z. WINDS ALOFT WILL BE LIGHT. && .PREV DISCUSSION... SHORT TERM...TONIGHT THROUGH TUESDAY...UPPER LEVEL LOW OVER NORTHERN CALIFORNIA IS FORECAST TO WEAKEN TONIGHT AND MOVE EAST OVER NORTHERN NEVADA. SO FAR THIS AFTERNOON ONLY FLAT CU HAS FORMED OVER SOUTHERN ZONES. THINKING THIS MORNING THAT MOISTURE MAY BE FURTHER NORTH THAN FORECAST HAS NOT OCCURRED SO WILL KEEP THE CURRENT FORECAST OF ISOLATED THUNDERSTORMS ALONG THE NEVADA BORDER THIS EVENING. UPPER LEVEL RIDGE REBUILDS OVER THE REGION FOR WARMING TEMPERATURES AND DRY CONDITIONS MONDAY AND MONDAY NIGHT. TUESDAY ANOTHER UPPER LEVEL LOW WILL BEGIN TO MOVE INTO THE WEST COAST AND WILL HELP AMPLIFY THE RIDGE OVER THE FORECAST AREA. THIS WILL BRING THE WARMEST TEMPERATURES OF THE WEEK. MOISTURE WITH THIS SYSTEM WILL BRING A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS TO BAKER COUNTY IN OREGON AND TO THE WEST CENTRAL MOUNTAINS OF IDAHO. LONG TERM...TUESDAY NIGHT THROUGH SUNDAY...NEXT UPPER LOW WEAKENS AND DRIFTS SOUTHWEST TO NORTHEAST ACROSS THE AREA ON TUESDAY NIGHT AND WEDNESDAY. THIS SHOULD DEFINITELY BRING TEMPERATURES BACK CLOSER TO NORMAL FOR WEDNESDAY. LOCATION OF SHOWERS WITH THIS SYSTEM IS SLIGHTLY DIFFERENT AMONG MODELS...BUT MOSTLY TRENDING TOWARD THE NORTHERN PART OF THE FORECAST AREA AND DRIER ALONG THE NEVADA BORDER. FOLLOWED THIS TREND...BUT KEPT POPS IN THE SLIGHT CHANCE RANGE UNTIL MODELS AGREE MORE ON TRACK. FOR THU/FRI...A COUPLE DAYS OF DRIER SOUTHWEST FLOW ACROSS THE AREA WITH TEMPERATURES NEAR NORMAL...ALTHOUGH THE GFS INSISTS THAT ONE WEAK IMPULSE IN THE SOUTHWEST FLOW MIGHT GO THROUGH NEVADA ON FRIDAY AND BRING A SLIGHT CHANCE OF SHOWERS ALONG THE NEVADA BORDER. MODELS ARE DEVELOPING A BROADER-SCALE TROUGH ALONG THE WEST COAST TOWARD THE WEEKEND. SOME MODEL TIMING DIFFERENCES WITH HOW FAST THIS WILL MOVE INLAND...BUT TRENDED TEMPS BACK DOWN TO BELOW NORMAL BY SUNDAY...AND STARTED TO INCREASE CHANCES OF PRECIP...EVEN THOUGH PRECIP MAY HOLD OFF TILL TROUGH GETS CLOSER EARLY NEXT WEEK. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...NONE. OR...NONE. && WEATHER.GOV/BOISE DISCUSSION...LC AVIATION.....JT PREV SHORT TERM...JA PREV LONG TERM....TB/BB
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BOISE ID 602 AM MDT SUN AUG 15 2010 IDZ011>016-028>030-033-ORZ061>064-161215- 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- 602 AM MDT SUN AUG 15 2010 /502 AM PDT SUN AUG 15 2010/ 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...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The Pocatello radar (KSFX), 157 km away, was scanning. The volume nearest the first event began at 04:45 UTC.
1 thunderstorm wind. Local standard time, as filed.
Jerome County Sherrif dispatch reported trees and power lines down in the town of Jerome and the ASOS reported a wind gust of 67 MPH.
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, August 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: 258210.