Several photographs from the public showed a funnel cloud near the Utah and Idaho border near interstate 84 just north of Snowville, Utah. The funnel nearly reached the ground.
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.
Several photographs from the public showed a funnel cloud near the Utah and Idaho border near interstate 84 just north of Snowville, Utah. The funnel nearly reached the ground.
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, 50 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. &&
Special Weather Statement National Weather Service Pocatello ID 113 PM MDT THU MAY 17 2018 IDZ018-032-172000- Lost River/Pashimeroi ID-Sawtooth Mountains ID- 113 PM MDT THU MAY 17 2018 ...SPECIAL WEATHER STATEMENT... At 112 PM MDT, Doppler radar was tracking a strong thunderstorm 8 miles northwest of Grouse. This storm was moving east at 5 to 10 mph. Half inch hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Mackay and Darlington. LAT...LON 4369 11369 4386 11375 4405 11327 4379 11323 TIME...MOT...LOC 1912Z 240DEG 0KT 4379 11369 GK
Special Weather Statement National Weather Service Pocatello ID 158 PM MDT THU MAY 17 2018 IDZ023-025-172045- Caribou Highlands ID-Wasatch Mountains/Idaho Portion ID- 158 PM MDT THU MAY 17 2018 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CARIBOU... SOUTHEASTERN FRANKLIN AND BEAR LAKE COUNTIES UNTIL 245 PM MDT... At 158 PM MDT, Doppler radar was tracking a strong thunderstorm over Saint Charles or 7 miles northwest of Bear Lake Idaho Portion. This storm was moving north at 10 mph. Nickel size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Montpelier, Bear Lake Idaho Portion, Georgetown, Saint Charles, Dingle, Paris, Bloomington, Bern, Minnetonka Cave, Ovid, Georgetown Summit, Liberty, Clear Creek Ranger Station, Emmigrant Summit and Bennington. LAT...LON 4255 11113 4204 11122 4205 11163 4258 11152 TIME...MOT...LOC 1958Z 240DEG 0KT 4211 11145 GK
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
232 PM MDT THU MAY 17 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0222 PM HAIL 5 E LUND 42.65N 111.79W
05/17/2018 M0.50 INCH CARIBOU ID PUBLIC
PEA TO DIME SIZE HAIL FELL FOR 3-5 MINUTES
AND BRIEFLY LIGHTLY COVERED THE GROUND IN
THE VALLEY NORTHWEST OF GRACE AND SOUTHEAST
OF BANCROFT, NOT FAR FROM THE CARIBOU COUNTY
LANDFILL.
&&
KSMITHSpecial Weather Statement National Weather Service Pocatello ID 259 PM MDT THU MAY 17 2018 IDZ022-172130- South Central Highlands ID- 259 PM MDT THU MAY 17 2018 ...STRONG THUNDERSTORM CAPABLE OF PRODUCING HAIL IN WEST CENTRAL CASSIA COUNTY... At 258 PM MDT, Doppler radar was tracking a strong thunderstorm 8 miles west of Oakley Reservoir. this storm was nearly stationary. Nickel size hail will be possible with this storm. Locations impacted include... Oakley and Bostetter Ranger Station. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 4211 11407 4215 11427 4238 11417 4227 11386 TIME...MOT...LOC 2058Z 210DEG 4KT 4218 11410 KSMITH/HINSBERGER
The Salt Lake City radar (KMTX), 89 km away, was scanning. The volume nearest the first event began at 21:19 UTC.
1 funnel cloud. Local standard time, as filed.
Several photographs from the public showed a funnel cloud near the Utah and Idaho border near interstate 84 just north of Snowville, Utah. The funnel nearly reached the ground.
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: 760257.