Heavy rains caused flash flooding in Fairview in Franklin County. Several residents of Fairview reported flooding in their homes with 128 homes also without power for 3 to 4 hours.
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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.
Heavy rains caused flash flooding in Fairview in Franklin County. Several residents of Fairview reported flooding in their homes with 128 homes also without power for 3 to 4 hours. Power was restored at 7:30 pm MDT.
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 9, 12:55 PM MST, 1 hour 35 minutes earlier.
Area Forecast Discussion National Weather Service Pocatello ID 155 PM MDT Wed Aug 9 2017 .SHORT TERM......Isolated convection already developing in area of weak trough and residual moisture along the southern Idaho border. Lapse rates remain on the steep side as well, along with precipitable water amounts of 0.75 to 0.99 inches. South Central and Caribou Highlands will be an area to watch this evening for a few thunderstorms with strong gusty outflow winds and possible heavy rain. There is also a trough sliding along the Divide that will support additional thunderstorms over the Central Mountains, Arco Desert, and areas along the Idaho and Montana border. Expect partial clearing over night and early Thursday, thus kept morning lows on the cool side. The low near the California coast appears to weaken and begin to be absorbed into the flow on Thursday. At the same time, a strong spoke of energy associated with the low near the Aleutian Islands advances towards the Pacific Northwest Coast, nudging the high pressure ridge inland over British Columbia. Thunderstorms in this area on Thursday should be a little less intense. .Long Term...The bulk of the deep moisture over Southeast Idaho probably will not move east of the state before Saturday morning. T here will likely be some residual moisture in this area for isolated afternoon thunderstorms even on the weekend. As the new week begins, models appear to be adjusting towards the GFS idea of a more progressive trough lifting northeast as it moves into the Idaho panhandle and Canada. Increased southwest flow will encourage valley temperatures moving back to middle 80s to near 90F range, humidity dropping back into the 10 to 17 percent range, and potential for afternoon thunderstorms mostly over the mountains. Afternoon may trend a little more breezy as well. RS && .Air Stagnation...Another day of showers and thunderstorms on Thursday, but less intense. Thursday night into Friday, subtropical moisture begins to move east of the state. Doesn't look like rapid scouring of the air, but at least transitioning that direction. The recent rain helped slow the production of new smoke from wildfires. RS && .AVIATION...Expect to see continued VFR conditions with light winds. Will have thunderstorm development again this afternoon and have vicinity at all sites again. SUN may be most likely to have on station. Any reduction in visibility due to smoke will not be significant. Expect similar conditions Thursday with VFR conditions and afternoon thunderstorm development. GK && .FIRE WEATHER...Will have at least isolated thunderstorms in all zones this afternoon and biggest issue will be heavy rains under strong cells and outflow winds over 30 mph near storms. At this point have not issued any red flag warnings for scattered coverage but think best chance for highest coverage would be in zones 427 and 413. With the high dewpoints think the storms will definitely trend toward the wet variety. See little changes the rest of the week with thunderstorms developing daily through Friday and into the weekend. Not expecting significant winds through Saturday but may see an increase Sunday with a system approaching. GK && .PIH WATCHES/WARNINGS/ADVISORIES...None. &&
Special Weather Statement National Weather Service Pocatello ID 147 PM MDT WED AUG 9 2017 IDZ022-092030- South Central Highlands ID- 147 PM MDT WED AUG 9 2017 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CASSIA COUNTY UNTIL 230 PM MDT... At 145 PM MDT, Doppler radar was tracking a strong thunderstorm near Elba or 13 miles southwest of Malta, moving northeast at 5 mph. Winds in excess of 40 mph will be possible with this storm, including 0.10 to 0.20 inches of rain. Locations impacted include... Elba. LAT...LON 4215 11370 4221 11371 4235 11349 4219 11338 TIME...MOT...LOC 1945Z 239DEG 4KT 4221 11361 RS
Special Weather Statement National Weather Service Pocatello ID 230 PM MDT WED AUG 9 2017 IDZ022-092115- South Central Highlands ID- 230 PM MDT WED AUG 9 2017 ...SPECIAL WEATHER STATEMENT... At 229 PM MDT, Doppler radar was tracking a strong thunderstorm near Elba or near Malta, moving east at 10 mph. Winds in excess of 30 mph will be possible with this storm. This storm will remain over mainly rural areas of east central Cassia County. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding of fields or low water crossings. Do not drive your vehicle through flooded roadways. && LAT...LON 4220 11349 4224 11351 4230 11325 4220 11323 TIME...MOT...LOC 2029Z 258DEG 9KT 4223 11344 RS
Special Weather Statement National Weather Service Pocatello ID 248 PM MDT WED AUG 9 2017 IDZ022-092130- South Central Highlands ID- 248 PM MDT WED AUG 9 2017 ...SPECIAL WEATHER STATEMENT... At 247 PM MDT, Doppler radar was tracking a strong thunderstorm 12 miles south of Rockland or 23 miles south of Neeley, moving east at 5 mph. Half inch hail and heavy rain up to one half inch will be possible with this storm. Locations impacted include... Roy. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4245 11272 4234 11271 4238 11291 4241 11291 TIME...MOT...LOC 2047Z 271DEG 4KT 4239 11285 RS
Special Weather Statement National Weather Service Pocatello ID 313 PM MDT WED AUG 9 2017 IDZ018-031-032-092200- Lost River/Pashimeroi ID-Big and Little Wood River Region ID- Sawtooth Mountains ID- 313 PM MDT WED AUG 9 2017 ...PENNY SIZE HAIL...HEAVY RAIN AND WINDS OVER 40 MPH FOR SOUTHEASTERN CUSTER...CENTRAL BLAINE AND WEST CENTRAL BUTTE COUNTIES UNTIL 400 PM MDT... At 312 PM MDT, Doppler radar was tracking a strong thunderstorm 7 miles west of Grouse, moving south at 10 mph. Penny size inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Grouse. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4377 11390 4379 11369 4356 11348 4351 11390 TIME...MOT...LOC 2112Z 337DEG 6KT 4369 11378 JKEYES
The Salt Lake City radar (KMTX), 100 km away, was scanning. The volume nearest the first event began at 21:30 UTC.
1 flash flood. Local standard time, as filed.
Heavy rains caused flash flooding in Fairview in Franklin County. Several residents of Fairview reported flooding in their homes with 128 homes also without power for 3 to 4 hours. Power was restored at 7:30 pm MDT.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2017Every state in 2017This day in weather historyWarnings in Idaho, August 2017
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: 718563.