Early on August 21st a thunderstorm caused trees to into a house on Pioneer Road in Idaho Falls killing an 82 year old man in his bedroom. Trees were also downed on East Lincoln Road.
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 PIH wrote it up.
Early on August 21st a thunderstorm caused trees to into a house on Pioneer Road in Idaho Falls killing an 82 year old man in his bedroom. Trees were also downed on East Lincoln Road.
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 Pocatello, ID wrote its last area forecast discussion before the first event at Aug 20, 8:11 PM MST, 3 hours 39 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE POCATELLO ID 911 PM MDT SAT AUG 20 2011 .UPDATE...NO CHANGES TO CURRENT FORECAST. ISOLATED THUNDERSTORMS STILL ONGOING OVER PORTIONS OF EASTERN IDAHO. THE STORMS HAVE LOOKED IMPRESSIVE ON RADAR WITH BEST REPORTS ONLY SHOWING HALF- INCH HAIL. NAM CONTINUES TO DEVELOP AREA OF QPF OVER THE CENTRAL MTNS AFTER MIDNIGHT...PUSHING POPS INTO THE SNAKE PLAIN AROUND SUNRISE. WILL CAUTIOUSLY KEEP POPS OUT OF THE SNAKE PLAIN AFTER 06Z TONIGHT FOR NOW AND RESERVE THE OPTION TO UPDATE LATER IF THE CURRENT CONVECTION CONTINUES TO HOLD ON. DMH && .PREV DISCUSSION... /ISSUED 222 PM MDT SAT AUG 20 2011/ SHORT TERM...SOUTHEAST IDAHO REMAINS UNDER A HIGH PRESSURE RIDGE CENTERED ROUGHLY IN NORTHERN NEW MEXICO WITH LIMITED PUSH OF MOISTURE NORTH TO IDAHO TODAY AND SUNDAY. THERE IS A LOW PRESSURE DISTURBANCE OVER NORTHERN CALIFORNIA...WHICH BOTH THE ECM AND GFS RETROGRADE SLOWLY OFF SHORE TO THE SOUTHWEST THROUGH THE MIDDLE OF NEXT WEEK. FOCUS OF FORECAST IS THEN THE MOISTURE SLIPPING NORTH AND THE WESTERLY FLOW THROUGH WASHINGTON AND NORTHERN IDAHO WITH A FEW EMBEDDED WAVES. WATER VAPOR IMAGERY SHOWS A DISTURBANCE IN EAST CENTRAL NEVADA MOVING TOWARDS BURLEY AND SUN VALLEY. SOME DRIER AIR EXISTS AHEAD OF IT AND WE WILL SEE THE NEXT FEW HOURS IF IT IS ENOUGH TO SHUT DOWN THUNDERSTORMS THIS AFTERNOON AND EVENING. OTHERWISE...ISOLATED THUNDERSTORMS HAVE BEEN MOVING INTO THE CENTRAL MOUNTAINS THE PAST COUPLE OF HOURS. MID LEVEL FORCING SHIFTS FROM THE CENTRAL MOUNTAINS TO ROUGHLY A LINE FROM STANLEY TO ISLAND PARK BY LATE SUNDAY MORNING WHICH SHOULD BE THE MAIN FOCUS FOR THUNDERSTORMS. ISOLATED LIGHTNING OVER NIGHT CAN NOT BE RULED OUT. RS LONG TERM...THE MOIST AIR ROTATES OFF INTO MONTANA AND WYOMING MONDAY THROUGH WEDNESDAY...POSSIBLY THURSDAY FOR A FEW DRY DAYS AND VALLEY TEMPERATURES CLOSE TO 90F. AFTER THAT MODELS ARE FUZZY ON WHAT TO DO WITH THE LOW RETROGRADING OFF SHORE...JUST WASH IT OUT OR MERGE IT WITH THE WESTERLIES ACROSS WASHINGTON. CURRENT FORECAST IS CLOSER TO CLIMATOLOGY BY NEXT WEEKEND OWING TO UNCERTAINTY. RS AVIATION...VFR CONDITIONS ARE EXPECTED THROUGH THE PERIOD. RADAR INDICATING AN AREA OF SHOWERS CURRENTLY OVER SOUTHERN IDAHO. MESOSCALE MODELS ARE PICKING UP ON THIS AND RE-DEVELOP CONVECTION OVER NORTHEAST NEVADA THIS AFTERNOON...DRIFTING OVER EASTERN IDAHO BY LATE AFTERNOON INTO EARLY EVENING. HAVE KEPT VCTS MENTION IN TAFS...BUT BACKED UP ON TIMING SLIGHTLY. HINSBERGER FIRE WEATHER...CHANCE FOR ISOLATED TO WIDELY SCATTERED THUNDERSTORMS CONTINUES WITH SOME RE-DEVELOPMENT EXPECTED AROUND MID TO LATE AFTERNOON. WITH HUMIDITY REMAINING LOW...WILL LEAVE RED FLAG WARNING GOING THROUGH MIDNIGHT. DRY AIR WILL PUSH INTO THE MAGIC VALLEY TOMORROW WITH THUNDER CHANCES TO OCCUR MAINLY IN AREAS WHERE FUELS ARE NOT YET CRITICAL. UPPER RIDGING WILL KEEP DRY AIR OVER THE REGION THROUGH THE COMING WEEK AND ISOLATED STORMS WILL BE CONFINED TO HIGHER ELEVATIONS. HINSBERGER && .PIH WATCHES/WARNINGS/ADVISORIES... RED FLAG WARNING UNTIL MIDNIGHT MDT TONIGHT IDZ409-412. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE POCATELLO ID 411 AM MDT SAT AUG 20 2011 IDZ017-022-211015- EASTERN MAGIC VALLEY-SOUTH CENTRAL HIGHLANDS- 411 AM MDT SAT AUG 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO. .DAY ONE...TODAY AND TONIGHT. RED FLAG WARNING IS IN EFFECT THIS AFTERNOON INTO EARLY EVENING FOR THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR SOUTHEAST IDAHO FIRE ZONES 409 AND 412. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... WE ASK TRAINED SPOTTERS AND CITIZENS TO REPORT SIGNIFICANT WEATHER CONDITIONS WHEN IT IS SAFE TO DO SO. THESE CONDITIONS MAY INCLUDE HAIL...TORNADOES...STRONG WIND...DUST STORMS...SNOWFALL... EXTREME COLD TEMPERATURES...FREEZING RAIN OR HEAVY RAIN...DENSE FOG...AND FLOODING OR ICE JAMS. INFORMATION ABOUT THESE HAZARDOUS CONDITIONS SHOULD BE CALLED INTO YOUR NATIONAL WEATHER SERVICE OFFICE IN POCATELLO USING THE 1-800 SEVERE WEATHER HOTLINE...OR 208-233-0834. IDZ018>021-023>025-031-032-211015- SAWTOOTH MOUNTAINS-UPPER SNAKE HIGHLANDS-UPPER SNAKE RIVER PLAIN- LOWER SNAKE RIVER PLAIN-CARIBOU HIGHLANDS- CACHE VALLEY/IDAHO PORTION-WASATCH MOUNTAINS/IDAHO PORTION- BIG AND LITTLE WOOD RIVER REGION-LOST RIVER/PAHSIMEROI- 411 AM MDT SAT AUG 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... WE ASK TRAINED SPOTTERS AND CITIZENS TO REPORT SIGNIFICANT WEATHER CONDITIONS WHEN IT IS SAFE TO DO SO. THESE CONDITIONS MAY INCLUDE HAIL...TORNADOES...STRONG WIND...DUST STORMS...SNOWFALL... EXTREME COLD TEMPERATURES...FREEZING RAIN OR HEAVY RAIN...DENSE FOG...AND FLOODING OR ICE JAMS. INFORMATION ABOUT THESE HAZARDOUS CONDITIONS SHOULD BE CALLED INTO YOUR NATIONAL WEATHER SERVICE OFFICE IN POCATELLO USING THE 1-800 SEVERE WEATHER HOTLINE...OR 208-233-0834.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE POCATELLO ID 710 PM MDT SAT AUG 20 2011 IDZ023-210245- BONNEVILLE ID- 710 PM MDT SAT AUG 20 2011 THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... SOUTHEASTERN BONNEVILLE COUNTY IN SOUTHEAST IDAHO UNTIL 845 PM MDT AT 706 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 9 MILES NORTH OF WAYAN..MOVING EAST AT 5 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... RURAL SOUTHERN BONNEVILLE COUNTY... RURAL SOUTHEASTERN BONNEVILLE COUNTY... LAT...LON 4302 11145 4317 11153 4338 11104 4302 11103 TIME...MOT...LOC 0110Z 248DEG 6KT 4312 11136 DMH
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
1139 PM MDT SAT AUG 20 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1138 PM TSTM WND GST 1 S IDAHO FALLS 43.48N 112.03W
08/20/2011 E50 MPH BONNEVILLE ID TRAINED SPOTTER
SPOTTER REPORTED ESTIMATED 50 MPH GUSTS
&&
DPHELPSSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
1145 PM MDT SAT AUG 20 2011
IDZ020-021-023-210630-
BINGHAM ID-BONNEVILLE ID-
1145 PM MDT SAT AUG 20 2011
THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
CENTRAL BONNEVILLE COUNTY IN SOUTHEAST IDAHO
EAST CENTRAL BINGHAM COUNTY IN SOUTHEAST IDAHO
UNTIL 1230 AM MDT
AT 1136 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 6 MILES SOUTHEAST OF GOSHEN..MOVING NORTHEAST AT
10 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
AMMON...
LAT...LON 4362 11190 4357 11169 4342 11140 4333 11164
4319 11199 4344 11222
TIME...MOT...LOC 0544Z 233DEG 11KT 4328 11195
TWThe Pocatello radar (KSFX), 67 km away, was scanning. The volume nearest the first event began at 06:50 UTC.
1 thunderstorm wind. Local standard time, as filed.
Early on August 21st a thunderstorm caused trees to into a house on Pioneer Road in Idaho Falls killing an 82 year old man in his bedroom. Trees were also downed on East Lincoln Road.
As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.
| Event | Date | Age | Sex | Where | Kind |
|---|---|---|---|---|---|
| Thunderstorm Wind, Bonneville | 2011-08-21 | 82 | Male | Permanent Home | Direct |
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2011Every state in 2011This day in weather historyWarnings in Idaho, August 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: 342036.