The Summit fire began July 25th from a lightning holdover and grew to 650 acres. It was just south of Oakley.
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The episode as NWS PIH wrote it up.
The Summit fire began July 25th from a lightning holdover and grew to 650 acres. It was just south of Oakley. It did not threaten any structures.
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 Jul 25, 10:23 AM MST, 37 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Pocatello ID 1123 AM MDT Fri Jul 25 2025 .KEY MESSAGES... - Daily, isolated shower and thunderstorms chances will continue through the weekend in the Central Mountains east along the Montana Divide, peaking in coverage each afternoon/evening. - Conditions will remain very dry outside of any showers or storms, supporting elevated fire weather conditions due to a combination of low relative humidity and breezy winds. - Temperatures will remain steady through Sunday, ahead of a warming trend starting Monday. && .SHORT TERM /THROUGH SATURDAY NIGHT/... Issued at 227 AM MDT Fri Jul 25 2025 Early morning satellite imagery shows a mid/upper-level low moving onshore into California, as a series of shortwave troughs continue to lift northeast out of the Sierra Nevada and northern Great Basin into Idaho. These shortwaves will work to support isolated to scattered shower and thunderstorm development (peaking in coverage each afternoon and evening) through the weekend, with best chances in the Central Mountains and Montana Divide. For today, the HREF model probability of thunder shows a 20-50% chance in the Central Mountains east along the Montana Divide, locally higher across northern Custer and Lemhi Counties where a 50-80% chance exists. This corridor is where we are expecting stronger storms to develop today, which will be capable of producing gusty outflow wind gusts up to 50 mph, small hail, brief heavy rain, and frequent lightning. The HREF model probability of winds greater than 35 mph also shows a 70-90% chance in this region today. Activity will become increasingly isolated after sunset tonight ahead of dry conditions back tonight into Saturday morning. Highs today will remain very similar to yesterday in the 80s/90s, with wind gusts outside of any thunderstorms peaking around 20-35 mph. Heading into the start of the weekend, we are expecting a very similar convective environment again for Saturday with another round of isolated to scattered thunderstorms in the Central Mountains east along the Montana Divide. The only difference will be isolated chances returning to the South Hills west into the Owyhees. Stronger storms will again be capable of producing gusty outflow wind gusts up to 45 mph, small hail, brief heavy rain, and frequent lightning. Dry conditions will return after sunset as dry conditions return regionwide Saturday night into Sunday. Highs on Saturday will remain similar to Friday, cooling by around 1-4 degrees, with wind gusts outside of any convection peaking around 25-35 mph. && .LONG TERM /SUNDAY THROUGH THURSDAY/... Issued at 227 AM MDT Fri Jul 25 2025 Daily, isolated to scattered thunderstorm chances will continue for Sunday up in the Central Mountains east along the Montana Divide as SW flow changes to being more southerly starting Monday. This change in mid/upper-level flow will allow for highs to climb around 3-6 degrees for Monday into the mid 80s to mid 90s, as best thunderstorm chances shift further north into Lemhi County and SW Montana. As a result, very dry conditions are expected Monday and Tuesday. Looking towards midweek, that southerly flow ultimately looks to tap into a plume of monsoonal moisture out of the Desert Southwest, aided by a reinforcing trough building in from the NE Pacific to the West Coast. This flow pattern will allow for monsoon moisture to lift north into the northern Rockies, as isolated to scattered thunderstorm chances return to eastern Idaho starting Wednesday. While the location and placement of this moisture fetch will vary over the coming times, the NBM is currently weighted closer to the ECMWF and favors a drier solution while keeping the bulk of precipitation outside of our area. The GFS in contrast, is favoring better moisture transport into eastern Idaho. Nonetheless, the bulk of ensemble model guidance is supporting at least isolated thunderstorms back in the forecast by midweek that will continue into next weekend. We will see exactly how this comes into focus over the coming days so stay tuned. && .AVIATION /18Z TAFS THROUGH 18Z SATURDAY/... Issued at 1123 AM MDT Fri Jul 25 2025 Another round of isolated to widely scattered thunderstorms is expected across East Idaho this afternoon and evening, but this time focused over the central mountains and along the Divide. High-res solutions and ensembles continue to keep thunderstorms focused north of SUN, with latest runs dropping the chance for thunder at SUN to less than 10%. Peak afternoon heating expected to be enough to mix down gust potential between 15-25 kts. Otherwise light and generally terrain driven winds are expected. && .FIRE WEATHER... Issued at 227 AM MDT Fri Jul 25 2025 A series of shortwave troughs passing over eastern Idaho through the weekend will support daily isolated to scattered showers and thunderstorms, peaking in coverage each afternoon and evening. Following thunderstorms yesterday that favored south of the Snake River Plain with multiple new lightning starts, best thunderstorm chances starting today through the weekend will shift into the Central Mountains east along the Montana Divide. Scattered coverage looks to remain confined to Idaho FWZ 475 and 476, with stronger storms each day capable of producing gusty outflow wind gusts up to 50 mph, small hail, brief heavy rain, and frequent lightning. Elevated to near critical fire weather conditions will also continue each day into early next week due to a combination of afternoon RHs mostly in teens/20s (pockets of single digits) combined with wind gusts peaking around 25-35 mph outside of any convection. Temperatures will hold steady through the weekend ahead of mid/upper-level SW flow changing to being more southerly starting Monday. This will allow for warmer and drier conditions to prevail to start the work week as thunderstorm chances become increasingly isolated and confined to Lemhi County and the Montana Divide. Starting midweek, increasing confidence supports monsoonal moisture lifting north into eastern Idaho, leading to daily isolated to scattered thunderstorm chances back in the forecast starting Wednesday. While the exact details will come into focus over the coming days, the bulk of ensemble model guidance continues to support this solution, with daily thunderstorm chances then expected to continue into next weekend as temperatures see a gradual cooling trend. && .PIH WATCHES/WARNINGS/ADVISORIES... None. && SHORT TERM...MacKay LONG TERM...MacKay AVIATION...DMH FIRE WEATHER...MacKay
The national radar mosaic for the moment the first event began.
1 wildfire. Local standard time, as filed.
The Summit fire began July 25th from a lightning holdover and grew to 650 acres. It was just south of Oakley. It did not threaten any structures.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2025Every state in 2025This day in weather historyWarnings in Idaho, July 2025
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: 1285994.