A 59 mph wind gust recorded at Sand Dunes.
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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.
A 59 mph wind gust recorded at Sand Dunes.
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 27, 12:52 PM MST, 2 hours 23 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Pocatello ID 152 PM MDT Wed May 27 2026 .KEY MESSAGES... - Isolated to scattered thunderstorms this afternoon. Some storms may produce strong gusty outflows. - Mainly dry Thursday. - Unsettled weather returns for the weekend. && .DISCUSSION... Issued at 152 PM MDT Wed May 27 2026 Satellite imagery shows deep closed low centered near Tahoe/Reno today. Enough moisture remains in place today for isolated to scattered thunderstorm development. A MARGINAL RISK of severe thunderstorms is in place, with potential for localized wind gusts to exceed 60 mph. The threat is greatest throughout the Snake Plain and Central Mountains this afternoon and early evening, but cannot rule out stronger storms throughout East Idaho. Drier air mass is in place for Thursday so little in the way of thunderstorm activity is expected. Recent high-res updates place isolated activity across the northeast corner of the forecast area Thursday afternoon, but only briefly, and greater model consensus keeps the forecast dry at this time. Friday into the weekend begins to trend significantly wetter as the upper low opens and ejects northeast across East Idaho. Rain becomes more widespread Friday night through Sunday, with Saturday the wettest period. Amounts have increased slightly from previous forecast, ranging from just under 0.10 across portions of the Eastern Magic Valley to potentially over 0.50" for higher elevations from the Central Mountains along the Divide to the Wyoming border. The cloud cover and precipitation do induce a cooler airmass, dropping daytime highs some 15-20 degrees to the lower/mid 60s for most of the lower elevations Saturday. Upper trough continues to eject north into Canada through Sunday, and additional precipitation may be possible Sunday and Monday as the trough impacts shift slowly away. For Tuesday and beyond, there is quite a bit of ensemble divergence, with clusters evenly split between keeping weak trough across Idaho and developing a weak warm ridge. Ensemble means trend dry, but high-end estimates still produce very weak liquid precipitation amounts over higher elevations. Current forecast favor dry conditions with lower elevation daytime highs trending back toward the 80s. && .AVIATION /18Z TAFS THROUGH 18Z THURSDAY/... Issued at 1113 AM MDT Wed May 27 2026 Another round of showers and thunderstorms possible for this afternoon and evening. We are covering this with VCSH and PROB30 with gusts in the TAFs up to 45kts, although gusts over 50kts are possible. With the low to our southwest, overall flow from an easterly or southeasterly component will prevail. Expect VFR even with most showers and storms, with any subsequent drops into MVFR or IFR with a heavier cell over a particular airport. We should clear out overnight and remain dry for Thursday. && .FIRE WEATHER... Issued at 206 AM MDT Wed May 27 2026 Expect another round of isolated to scattered thunderstorms this afternoon. Storms will once again be a mix of wet and dry storms with erratic, gusty winds possible near storms. Thursday looks to be the driest day of the week, although a stray thunderstorm is still possible. Humidity levels on Thursday will be in the teens and wind gusts will range from 20 to 30 mph. && .PIH WATCHES/WARNINGS/ADVISORIES... None. && DISCUSSION...DMH AVIATION...Keyes FIRE WEATHER...13
Special Weather Statement
National Weather Service Pocatello ID
205 PM MDT Wed May 27 2026
IDZ052-067>069-272030-
Arco/Mud Lake Desert ID-Lost River Range ID-
Beaverhead/Lemhi Highlands ID-Lost River Valleys ID-
205 PM MDT Wed May 27 2026
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN JEFFERSON...EAST
CENTRAL BUTTE...SOUTHWESTERN CLARK AND NORTHWESTERN BINGHAM COUNTIES
THROUGH 230 PM MDT...
At 204 PM MDT, Doppler radar was tracking a strong thunderstorm near
Southeast Inl, or 18 miles southwest of Terreton, moving northwest at
30 mph.
HAZARD...Wind gusts of 50 to 55 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to outdoor objects is
possible.
Locations impacted include...
Southeast Inl, Northwest Inl, and Howe.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4367 11254 4354 11271 4372 11318 4398 11286
TIME...MOT...LOC 2004Z 132DEG 25KT 4366 11271
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH
DMHSpecial Weather Statement
National Weather Service Pocatello ID
344 PM MDT Wed May 27 2026
IDZ052-067-068-272230-
Arco/Mud Lake Desert ID-Beaverhead/Lemhi Highlands ID-
Lost River Valleys ID-
344 PM MDT Wed May 27 2026
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN JEFFERSON...EAST
CENTRAL BUTTE...NORTHWESTERN BONNEVILLE...SOUTHWESTERN CLARK AND
NORTHWESTERN BINGHAM COUNTIES THROUGH 430 PM MDT...
At 344 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles northeast of Southeast Inl, or 12 miles southwest of Terreton,
moving northwest at 25 mph.
HAZARD...Wind gusts in excess of 45 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to outdoor objects is
possible.
Locations impacted include...
Terreton, Mud Lake, Northwest Inl, Monteview, and Southeast Inl.
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 4392 11243 4369 11241 4357 11248 4357 11266
4382 11298 4405 11269
TIME...MOT...LOC 2144Z 138DEG 24KT 4370 11258
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...45 MPH
McKaughanPreliminary Local Storm Report
National Weather Service Pocatello ID
404 PM MDT Wed May 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0340 PM Tstm Wnd Gst 9 SSW Mud Lake 43.72N 112.55W
05/27/2026 M53 MPH Jefferson ID Mesonet
Rover Mesonet.
&&Preliminary Local Storm Report
National Weather Service Pocatello ID
413 PM MDT Wed May 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0300 PM Non-Tstm Wnd Gst 4 SE Albion 42.37N 113.52W
05/27/2026 M50 MPH Cassia ID Mesonet
ITD Conner Summit Mesonet.
&&The Pocatello radar (KSFX), 76 km away, was scanning. The volume nearest the first event began at 22:14 UTC.
1 thunderstorm wind. Local standard time, as filed.
A 59 mph thunderstorm wind gust occurred at the INL Sand Dunes site.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2026Every state in 2026This day in weather historyWarnings in Idaho, May 2026
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: 1343843.