A 67 mph wind was recorded at the INL Puzzle site. A 64 mph wind recorded at Kettle Butte ITD site.
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.
A 67 mph wind was recorded at the INL Puzzle site. A 64 mph wind recorded at Kettle Butte ITD site.
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 17, 1:30 PM MST, 4 hours 25 minutes earlier.
Area Forecast Discussion National Weather Service Pocatello ID 230 PM MDT Thu May 17 2018 .SHORT TERM...Tonight through Sunday. More showers and thunderstorms are expected this evening through Sunday. Brunt of activity in central mountains tonight but all of southeast Idaho may see activity with main threat today of hail. Could see isolated severe storms as well. Widespread activity Friday across all areas with many areas getting over a tenth of an inch of rain through Friday with localized amounts over a half inch expected. Brunt of activity Saturday expected in far east in mountains along Wyoming and Utah borders. Activity should be much less on Sunday in between systems and coverage mainly in mountains but unstable enough still for at least isolated coverage everywhere. Expect slightly cooler than normal high temperatures Friday with the expected cloud cover and warming to right around normal Saturday and Sunday. GK .LONG TERM...Monday Through Thursday. Very few changes made to the long-term forecast grids as we are monitoring active convection this afternoon. Same general idea of an unsettled weather pattern continues next week as yet another low pressure system slowly moves onshore across California and into our region, bringing daily chances for scattered showers and thunderstorms, maximized during the afternoon and evening hours coincident with peak heating and instability. Did increase PoPs Wednesday afternoon/eve and Thursday afternoon/eve as the low looks to be nearly overhead with decent shower/storm coverage projected on the models. This one looks like another slow mover, and may not clear our region until Friday. High temperatures look to largely remain in the 70s throughout the week (60s at higher elevations), with Wednesday and Thursday looking coolest. - KSmith/GK && .AVIATION...Trends of showers and thunderstorms will continue in southeast Idaho through Friday. Have vicinity thunderstorms at all sites this afternoon and evening. Should stay VFR except under a heavy shower. Winds generally light except near thunderstorm outflow. GK && .PIH WATCHES/WARNINGS/ADVISORIES... None. &&
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
422 PM MDT THU MAY 17 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0350 PM HAIL 4 NNE HOLBROOK 42.22N 112.63W
05/17/2018 E0.25 INCH ONEIDA ID TRAINED SPOTTER
&&
NPSpecial Weather Statement National Weather Service Pocatello ID 540 PM MDT THU MAY 17 2018 IDZ019-020-180015- Upper Snake Highlands ID-Upper Snake River Plain ID- 540 PM MDT THU MAY 17 2018 ...Strong thunderstorm with large hail and strong winds just northeast of Hamer UNTIL 615 PM MDT... At 538 PM MDT, Doppler radar was tracking a strong thunderstorm 8 miles northeast of Hamer or 15 miles southeast of Dubois, moving northeast at 35 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Saint Anthony Sand Dunes. LAT...LON 4399 11171 4386 11206 4400 11221 4421 11199 TIME...MOT...LOC 2338Z 233DEG 29KT 4398 11205 AD/JAH
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
607 PM MDT THU MAY 17 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0553 PM TSTM WND GST POCATELLO AIRPORT 42.92N 112.60W
05/17/2018 M55 MPH POWER ID OFFICIAL NWS OBS
RECORDED AT THE POCATELLO REGIONAL AIRPORT.
&&
ADESMETSpecial Weather Statement National Weather Service Pocatello ID 613 PM MDT THU MAY 17 2018 IDZ019-020-180045- Upper Snake Highlands ID-Upper Snake River Plain ID- 613 PM MDT THU MAY 17 2018 ...Hail and gusty winds near hamer and camas national wildlife refuge UNTIL 645 PM MDT... At 611 PM MDT, Doppler radar was tracking a strong thunderstorm near Hamer or 14 miles south of Dubois, moving north at 10 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. This storm will also produce frequent lightning and heavy rainfall. Reduce driving speeds. Locations impacted include... Hamer. LAT...LON 4388 11213 4392 11230 4411 11224 4402 11194 TIME...MOT...LOC 0011Z 201DEG 10KT 4397 11220 AD/JAH
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
628 PM MDT THU MAY 17 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 PM HAIL 7 SSW ARBON VALLEY 42.79N 112.63W
05/17/2018 E0.25 INCH POWER ID NWS EMPLOYEE
&&
NPPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
629 PM MDT THU MAY 17 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0610 PM HAIL DUBOIS 44.18N 112.23W
05/17/2018 E0.25 INCH CLARK ID PUBLIC
&&
NPThe Pocatello radar (KSFX), 55 km away, was scanning. The volume nearest the first event began at 00:58 UTC.
2 thunderstorm wind. Local standard time, as filed.
The Kettle Butte INL site recorded a 64 mph wind gust associated with a thunderstorm gust front.
A 67 mph wind was recorded at the INL Puzzle site.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2018Every state in 2018This day in weather historyWarnings in Idaho, May 2018
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: 760266, 760263.