A verified tornado, severe thunderstorm winds and large hail all occurred on the 23rd.
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 verified tornado, severe thunderstorm winds and large hail all occurred on the 23rd.
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 Jun 23, 1:53 AM MST, 9 hours 37 minutes earlier.
Area Forecast Discussion National Weather Service Pocatello ID 253 AM MDT Fri Jun 23 2023 .SHORT TERM...TODAY THROUGH SATURDAY NIGHT... Our active wx day has arrived as a negatively-tilted trough tracks NE across the forecast area. With virtually no capping noted on forecast soundings, and as supported by the HREF, showers/t-storms should initiate by mid-AM (early show) tapping into 1,000-2,000 J/kg of SBCAPE that will peak between 15z/9am and 23z/5pm. A thorough evaluation of severe wx parameters and soundings this AM suggests several cells may briefly pulse into strong/marginally severe territory (hail and gusty winds) tapping into the instability and steep lapse rates, but marginal shear, modest/skinny CAPE profile in the column, and somewhat early timing of the system should limit the severe risk. Sat looks drier overall, although a few afternoon showers/t-storms may still fire over the nrn third of the CWA. 01 .LONG TERM...SUNDAY THROUGH NEXT FRIDAY... On Sunday, an upper level trough will be present from the Idaho Panhandle through central California. A pair of areas of low pressure exist within the trough. The first is near the Idaho Panhandle. This low will slowly migrate eastward Sunday, producing isolated to scattered storms across the region. Meanwhile, a second low centered across central California will remain slowly march east into the Great Basin through early next week. This low will continue the threat for scattered thunderstorms through midweek. Models reach considerable disagreement on Thursday with 60% of members moving the low through the region on Wednesday leaving zonal flow across the region for late week. This solution would result in a drier forecast for late week. However, 40% of members continue hang on to some form of trough across the Great Basin through late week. These members would continue the threat for scattered storms. Temperatures through the extended look relatively seasonable with no major pushes of hot or cold air across the northwestern U.S. 13 && .AVIATION... Low pressure overhead will provide enough instability shortly after sunrise for scattered thunderstorms. High resolution models having a difficult time nailing down when/where. Will attempt to time storms this morning based on combination of HREF members along with satellite/radar trends. Then time storms this afternoon based on HREF. Gusty outflow winds will accompany storms. Outside of storms, gusts to 20 kts are possible this afternoon most likely at PIH and BYI. Expect convection to diminish after 02z this evening. 13 && .FIRE WEATHER... Sct showers/t-storms are expected today. Forecast QPF amounts have trended slightly lower, with 0.20 to 0.40" expected from the Central Mntns wrapping through the Upper Snake Highlands into the Big Holes (less than 0.10" elsewhere), and certainly higher totals under stronger cores. Those operating on prescribed burns should be alert for lightning, heavy downpours, small hail, and gusty winds today, especially 9 AM to 6 PM. An active wx pattern with daily chances of iso to sct showers/t-storms is expected into next week. 01 && .HYDROLOGY... WPC-calibrated QPF has trended just slightly drier overall with today's system, model-projected PWATs average only 0.40 to 0.70 inches, and individual storm motions should be quite progressive. Thus, the overall risk of flooding appears low, and river/creek responses are expected to be very modest. Certainly stronger storm cores could be producing heavy rain, and localized training can't be ruled out, but any resultant flash flood threat would require a perfect combination of factors and would be very localized. 01 && .PIH WATCHES/WARNINGS/ADVISORIES... None. &&
The Pocatello radar (KSFX), 94 km away, was scanning. The volume nearest the first event began at 18:31 UTC.
2 funnel cloud, 1 tornado, 1 hail, 1 thunderstorm wind. Local standard time, as filed.
The public submitted several photographs of a tornado touched down north of Grace near US Highway 30. It was a weak tornado and subsequent surveys noted zero damage as the tornado was in an open field.
Funnel cloud seen near Lava Hot Springs.
Funnel cloud seen near Herman.
The Moody RAWS measured 58 mph wind gust.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2023Every state in 2023This day in weather historyThe tornado archive for Idaho, 2023Warnings in Idaho, June 2023
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: 1114698, 1114700, 1114703, 1114706, 1114711.