Strong thunderstorm winds arced power lines near Rexburg along Highway 33 near 3000W. HIghway 33 closed from 7 pm to 9 pm MDT from 3000 to 4000 W.
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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 PIH wrote it up.
Strong thunderstorm winds arced power lines near Rexburg along Highway 33 near 3000W. HIghway 33 closed from 7 pm to 9 pm MDT from 3000 to 4000 W.
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 5, 12:15 PM MST, 4 hours 35 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE POCATELLO ID 115 PM MDT FRI AUG 5 2011 .DISCUSSION...MINOR UPPER TROFS ARE MOVING ACROSS THE FCST AREA THIS AFTN...RESULTING IN TSTMS DEVELOPING OVER THE CENTRAL MTNS AND THE UPPER SNAKE HIGHLANDS. ISOLD TSTMS ALSO EXPECTED OVER THE SOUTHERN HIGHLANDS AND THE UPPER SNAKE RIVER PLAIN. SMALL HAIL IS POSSIBLE WITH SOME OF THESE THUNDERSTORMS. DEWPTS ARE LOWER TODAY ...SO TSTM COVERAGE SHOULD BE LESS THAN YESTERDAY. THIS PATTERN WILL CONTINUE THROUGH THE WEEKEND...BUT LIMITED MOISTURE WILL KEEP AFTN AND EVE TSTMS MAINLY OVER THE MTNS WITH ISOLD COVERAGE. BY MONDAY...ISOLD TSTMS SHOULD BE CONFINED TO NEAR THE DIVIDE. THIS WILL BE THE TREND FOR THE REST OF NEXT WEEK. TEMPS WILL BE RUNNING CLOSE TO NORMAL. HEDGES && .AVIATION...EXPECT SHOWERS AND THUNDERSTORMS ACROSS HIGHER TERRAIN THIS AFTERNOON INTO EARLY EVENING PARTICULARLY FOR THE CENTRAL MOUNTAINS. LOOK FOR GRADUALLY CLEARING OVERNIGHT WITH LIGHT WINDS. WYATT && .FIRE WEATHER...LOOK FOR ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS OVER HIGHER TERRAIN THIS AFTERNOON INTO EARLY EVENING PARTICULARLY FOR THE CENTRAL MOUNTAINS AND UPPER SNAKE HIGHLANDS. EXPECT LINGERING ISOLATED SHOWERS AND THUNDERSTORMS OVER HIGHER TERRAIN THROUGH THE WEEKEND. EXPECT GRADUALLY DRYING WITH JUST ISOLATED SHOWERS AND THUNDERSTORMS OVER THE CENTRAL MOUNTAINS AND UPPER SNAKE HIGHLANDS BY MONDAY. EXPECT CONTINUED DRYING AND WARMING THROUGH NEXT WEEK. WYATT && .PIH WATCHES/WARNINGS/ADVISORIES... NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE POCATELLO ID 348 AM MDT FRI AUG 5 2011 IDZ017>025-031-032-061200- EASTERN MAGIC VALLEY-SAWTOOTH MOUNTAINS-UPPER SNAKE HIGHLANDS- UPPER SNAKE RIVER PLAIN-LOWER SNAKE RIVER PLAIN- SOUTH CENTRAL HIGHLANDS-CARIBOU HIGHLANDS- CACHE VALLEY/IDAHO PORTION-WASATCH MOUNTAINS/IDAHO PORTION- BIG AND LITTLE WOOD RIVER REGION-LOST RIVER/PAHSIMEROI- 348 AM MDT FRI AUG 5 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO. .DAY ONE...TODAY AND TONIGHT THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. ISOLATED THUNDERSTORMS ARE POSSIBLE THROUGHOUT THE DAY TODAY...BUT ARE NOT EXPECTED TO BE AS STRONG AS THE STORMS OF THURSDAY AFTERNOON AND THURSDAY NIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. HIGH PRESSURE WILL MOVE INTO SOUTHERN IDAHO AND KEEP CONDITIONS DRY...WARM...AND STABLE. ISOLATED DRY THUNDERSTORMS WILL BE POSSIBLE IN THE HIGHER ELEVATIONS DURING THIS TIME. .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. MESSICK
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE POCATELLO ID 245 PM MDT FRI AUG 5 2011 IDZ020-032-052130- BUTTE ID-CUSTER ID- 245 PM MDT FRI AUG 5 2011 THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... SOUTHEASTERN CUSTER COUNTY IN CENTRAL IDAHO CENTRAL BUTTE COUNTY IN EAST CENTRAL IDAHO UNTIL 330 PM MDT AT 241 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR GROUSE..MOVING EAST AT 20 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 45 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING. LOCATIONS IMPACTED INCLUDE... ARCO... LAT...LON 4378 11315 4351 11323 4363 11377 4383 11363 TIME...MOT...LOC 2045Z 282DEG 14KT 4369 11359 HEDGES
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
426 PM MDT FRI AUG 5 2011
IDZ022-024-052315-
ONEIDA ID-FRANKLIN ID-
426 PM MDT FRI AUG 5 2011
THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
SOUTHWESTERN FRANKLIN COUNTY IN SOUTHEAST IDAHO
SOUTHEASTERN ONEIDA COUNTY IN SOUTHEAST IDAHO
UNTIL 515 PM MDT
AT 419 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR CHERRY CREEK...CROSSING INTERSTATE 15 NEAR
THE IDAHO AND UTAH STATE LINE..MOVING EAST AT 15 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
CHERRY CREEK...
LAT...LON 4199 11218 4200 11235 4211 11238 4224 11190
4200 11182 4199 11190 4199 11214 4199 11215
4199 11217
TIME...MOT...LOC 2224Z 256DEG 13KT 4205 11224
RSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
507 PM MDT FRI AUG 05 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0506 PM HAIL TABER 43.32N 112.63W
08/05/2011 M0.25 INCH BINGHAM ID TRAINED SPOTTER
&&
CHATTINGSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
544 PM MDT FRI AUG 05 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0530 PM TSTM WND GST BERN 42.33N 111.38W
08/05/2011 M60.00 MPH BEAR LAKE ID TRAINED SPOTTER
&&
CHATTINGSSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE POCATELLO ID 550 PM MDT FRI AUG 5 2011 IDZ019-060030- FREMONT ID- 550 PM MDT FRI AUG 5 2011 THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... SOUTH CENTRAL FREMONT COUNTY IN EASTERN IDAHO UNTIL 630 PM MDT AT 548 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR ST. ANTHONY..MOVING EAST AT 15 MPH. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... ST. ANTHONY... CHESTER... LAT...LON 4419 11144 4395 11136 4391 11182 4407 11191 TIME...MOT...LOC 2350Z 256DEG 11KT 4401 11175 RS
The Pocatello radar (KSFX), 102 km away, was scanning. The volume nearest the first event began at 23:48 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds caused power lines to arc and be damaged closing HIghway 33 near Rexburg from 7 pm to 9 pm MDT between 3000 and 4000 W.
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: 342034.