The Big Lost Wood River flooded at Leslie on Highway 93. Two homes were affected at the foundation with flooding.
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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.
The Big Lost Wood River flooded at Leslie on Highway 93. Two homes were affected at the foundation with flooding. They were upstream of the Highway 93 bridge over the Big Lost River.
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 31, 6:52 PM MST, 6 hours 8 minutes earlier.
Area Forecast Discussion National Weather Service Pocatello ID 752 PM MDT Thu May 31 2018 .SHORT TERM...Tonight through Friday night. Action over for tonight. Have cancelled watch and will be updating the forecast shortly. Winds strong enough Friday for a Lake Wind Advisory on American Falls Reservoir. See previous discussion below. Huston Well, thunderstorms this afternoon are quiet a bit more interesting that yesterday. A cold front is slowly moving east across the region. As the afternoon continues, we expect a line of storms to move slowly east from the Magic Valley. Strong thunderstorms are also developing well out ahead of the front. Also, some descent low level shear so an isolated tornado is possible along with large hail and damaging straight-lined winds. A severe thunderstorm watch is in effect until 8 PM for much of the region minus Custer County where it looks like most of the action will remain southeast of there. Expect activity to gradually diminish this evening as we lose the heat of the day. During the overnight hours, a reinforcing cold front will arrive from the northwest. This will spread bring another round of showers across the region with the best chances for showers overnight closer to the Montana border. Showers will linger into Friday morning, perhaps early afternoon around the Teton Valley area. Then, we will see clearing skies with brisk conditions developing. Potentially, may need a wind advisory across portions of the region. Valle .LONG TERM...Saturday through next Thursday...The weekend will be warm and dry with no chance for precipitation. An approaching trough early next week will bring a chance for precipitation Monday into Tuesday though chances right now are low. NP/Valle && .AVIATION...Thunderstorms will again run TAF's this afternoon and evening with a line of thunderstorms expected and isolated severe thunderstorms expected as well. The line of thunderstorms will track through BYI, PIH and IDA early this evening. Expect strong wind gusts with these thunderstorms as well. NP/Valle && .PIH WATCHES/WARNINGS/ADVISORIES... Lake Wind Advisory for American Falls Reservoir from 10AM to 9PM Friday. &&
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
The Big Lost Wood River flooded at Leslie on Highway 93. Two homes were affected at the foundation with flooding. They were upstream of the Highway 93 bridge over the Big Lost River.
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, June 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: 768124.