Strong wind gusts caused damage from thunderstorms.
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.
Strong wind gusts caused damage from thunderstorms.
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 May 6, 12:53 PM MST, 1 hour 53 minutes earlier.
Area Forecast Discussion National Weather Service Pocatello ID 153 PM MDT Sat May 6 2017 .SHORT TERM...Tonight through Monday night. The deep upper trof off the west coast is elongating into a split flow system this aftn with a closed low forming off the central CA coast. Strong southerly flow ahead of this system continues to stream moisture into ID. This is resulting in more showers and tstms thru Sunday...with the best chances in the central mtns and along the Divide. Some of the tstms will have the potential for strong outflow winds and small hail thru this eve. On Sunday...the closed upper low deepens and moves to southern CA. This sets up a deformation zone over the fcst area and will result in more showers/tstms mainly over the central mtns and along the divide again. The split flow system remains fairly much in place on Mon...with a repeat of Sun. Models are similar with the system placement...but differ somewhat on the precip location. Temps are expected to be cooler Sun and Mon. Hedges .LONG TERM...Tuesday through Saturday. Weak northern stream trof combined with lingering moisture north of closed low should lead to at least isolated to scattered showers and thunderstorms Tuesday. Models mainly dry through the remainder of period with GFS holding onto some precipitation Wednesday. GFS also brings in some more showers with an incoming Pacific trof on Friday and Saturday. Did not do too much in grids and at least kept in some mountain showers and thunderstorms thorugh the period with higher and more widespread precipitation next Friday and Saturday. Expect mild temperatures through Friday with some potential cooling Saturday with the next system. Not high confidence in long term forecast. GK && .AVIATION...Expect convective activity to increase through the afternoon into early evening and with that have vicinity thunderstorms and showers through tonight with the thunder through sunset at least. Should stay VFR and there is a decent chance any TAF site could see thunder at any time through 02 or 03Z this evening. Expect 10 to 15 knot sustained winds this afternoon and evening with heating and any thunderstorm could produce outflow gusts of 40 to 50 knots as well. GK && .HYDROLOGY...Warm temps and precip last night is pushing stream levels up significantly today in the central mtns. The Big Wood River in particular has been rising rapidly. With more rain expected tonight...the Big Wood may rise to the major flood category on Sun. Cooler temps on Sun and Mon should slow the snowmelt and allow the Big Wood to fall back a bit. Other streams in the central mtns are becoming problematic. The Salmon River below Yankee Fork continues to rise...and tributary streams are reaching record levels near Clayton. Another problem area is the Big Lost River above the Mackay Reservoir...which is expected continue rising thru next week to near record levels. Hedges && .PIH WATCHES/WARNINGS/ADVISORIES... None. &&
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
1242 PM MDT SAT MAY 06 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0900 AM FLOOD 3 WSW KETCHUM 43.67N 114.43W
05/06/2017 BLAINE ID LAW ENFORCEMENT
BIG WOOD RIVER AT HAILEY EXCEEDED MODERATE FLOOD STAGE AT
1015 AM. WARM SPRINGS CREEK W OF KETCHUM ALSO FLOODING.
MEDIA REPORTS FIRE DEPTS RESPONDING TO A TECHNICAL RESCUE
ON BOARD RANCH W OF KETCHUM FOR A HOUSE SURROUNDED BY
WATER WITH RESIDENTS TRAPPED. VOLUNTARY EVACUATION ORDER
ISSUED FOR LOWER BOARD RANCH, UPPER BOARD RANCH, AND
FRENCHMANS BEND AREA. WARM SPRINGS RD AND PICABO ST W OF
KETCHUM AND SEVERAL STREETS ALONG THE BIG WOOD RIVER IN
HAILEY AFFECTED BY FLOODING. REPORTS BEGAN AT 9 AM.
&&
KSMITHSpecial Weather Statement National Weather Service Pocatello ID 203 PM MDT SAT MAY 6 2017 IDZ023-025-062100- Caribou Highlands ID-Wasatch Mountains/Idaho Portion ID- 203 PM MDT SAT MAY 6 2017 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN CARIBOU AND NORTHEASTERN BEAR LAKE COUNTIES UNTIL 300 PM MDT... At 202 PM MDT, Doppler radar was tracking a strong thunderstorm near Georgetown, or 11 miles north of Montpelier. This storm was moving north at 25 mph. Wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Henry, Diamond Creek Campground, Smokey Canyon Mine, Mill Canyon Campground and Clear Creek Ranger Station. LAT...LON 4244 11105 4243 11130 4292 11155 4296 11104 TIME...MOT...LOC 2002Z 240DEG 0KT 4249 11125 GK
Special Weather Statement
National Weather Service Pocatello ID
339 PM MDT SAT MAY 6 2017
IDZ017-031-062230-
Big and Little Wood River Region ID-Eastern Magic Valley ID-
339 PM MDT SAT MAY 6 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BLAINE AND WESTERN
LINCOLN COUNTIES UNTIL 430 PM MDT...
At 338 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles southwest of Shoshone, moving north at 35 mph.
Half inch hail and winds in excess of 45 mph will be possible with
this storm.
Locations impacted include...
Shoshone and Shoshone Ice Caves.
LAT...LON 4320 11460 4320 11438 4321 11437 4320 11433
4284 11436 4285 11438 4285 11459
TIME...MOT...LOC 2138Z 175DEG 32KT 4285 11450
HedgesThe Pocatello radar (KSFX), 73 km away, was scanning. The volume nearest the first event began at 21:46 UTC.
4 thunderstorm wind. Local standard time, as filed.
A 58 mph wind gust measured at the Pole Canyon RAWS.
Large tree was downed in a cemetery.
Sixty mph wind gust at ARL Rover site.
A 58 mph wind gust measured at Bald Mountain.
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, May 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: 703566, 703557, 703561, 703563.