Thunderstorm wind gusts downed power lines and power outages near Arco.
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.
Thunderstorm wind gusts downed power lines and power outages near Arco.
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 20, 1:40 AM MST, 19 hours 10 minutes earlier.
Area Forecast Discussion National Weather Service Pocatello ID 240 AM MDT Sat Jul 20 2024 .SHORT TERM...Today through Sunday Night. Early morning satellite imagery shows a H5 ridge of high pressure over the WRN CONUS with the center slowly shifting from the Four Corners region to being over the Great Basin. As this ridge axis progresses west, very dry air over the PacNW will filter in this weekend which will work to limit convection chances to increasingly isolated coverage for Saturday and even furthermore on Sunday. Have lined up this afternoons 15-25% POPs more towards the HREF probability of thunder (given a very dry NBM bias as of late) with the HREF showing a 20-60% chance along and east of I-15 to the Wyoming border with less than a 20% chance elsewhere. The convective environment today will remain very similar to previous days with around 300-800 J/kg of SBCAPE, 15-20 kts of 0-6 km shear, and 8-9 degree/km 700-500 mb lapse rates. As a result, stronger storms will be capable of producing wind gusts to 30-50 mph (locally 50-60 mph), brief heavy rain, and frequent lightning. PWATs in that 0.50-0.80" range will also support a mix of wet and dry thunderstorms. For Sunday, that very dry airmass that was over the PacNW will now be overhead which will further limit convection chances to less than a 15% chance regionwide and have gone ahead with a dry forecast with POPs peaking around 5-10%. With high pressure overhead through the weekend, temperatures will remain seasonably warm and generally about 4-10 degrees above normal for late July which means high in the upper 80s to low 100s. Overnight lows will range from the 40s/50s/60s to low 70s around the Magic Valley. Given our location in the NE sector of the H5 ridge this weekend, predominant surface flow will now be out of the N/NE which will actually help to bring temperatures down a few degrees this weekend across the Upper Snake Plain region but other areas will see little to no impact from this. Synoptic winds will also see a slight uptick over the next couple of days with gusts peaking around 20-40 mph each afternoon outside of winds remain elevated tonight into Sunday across the Snake Plain corridor out of the N/NE. MacKay .LONG TERM...Monday through next Saturday. Upper level ridge centered over the western Great Basin will produce above normal temperatures through mid week. Heat risk values show marginal indices for heat headlines as most nights we are seeing good recovery. Best chance for heat advisories is Wednesday which looks to be the warmest day in terms of afternoon temperatures and overnight recovery. Models continue to show an upper level trough pressing into the Pacific Northwest late next week. This will cool temperatures to seasonable levels. Isolated to scattered thunderstorms will remain possible most days as monsoon moisture rotates around the center of the ridge. Best chances for organized thunderstorms is Thursday and Friday when the trough begins to work into the region. 13 && .AVIATION...For the 12Z TAFS through 12Z Sunday. Main concern is possibility of afternoon storms. About 20 percent of high res models are showing storms drifting near IDA, PIH and DIJ this afternoon. Most storms look to be southeast of the TAF sites. Unsure at this time if will introduce a mention of VC at any TAF sites. Will take another look at latest high res model runs before 12z TAFs are due. HRRR smoke model shows some smoke drifting through today, but visibilities are not expected to be affected. 13 && .FIRE WEATHER... Seasonably warm and predominantly dry conditions will continue through the weekend courtesy of a broad H5 ridge of high pressure overhead as weak monsoon moisture over this ridge feature works to support isolated thunderstorm activity. Best chances this weekend will be today where a 15-25% chance of afternoon showers and thunderstorms will exist along and east of I-15 with stronger storms being capable of producing wind gusts to 30-50 mph (locally 50-60 mph), brief heavy rain, and frequent lightning. A very dry airmass over the PacNW today will shift to being more overhead for Sunday which will further limit thunderstorm chances to less than 15% regionwide. Heading into early next week, look for much of the same with around a 10-20% chance of showers and thunderstorms (mostly in the mountains) each afternoon. High temperatures will also see a gradual warming trend as a H5 ridge axis shifts east with highs likely peaking Wednesday in the 80s to low 100s. Around that Wednesday/Thursday timeframe, a H5 low in the NE Pacific will move onshore to WRN Canada and help to bring a H5 trough over the PacNW and NRN Rockies for late next week. This will support a mix of isolated to scattered showers and thunderstorms for Thursday and Friday when the trough begins to pass overhead which will lead to cooler, more seasonable temperatures. In addition to cooler temperatures and an uptick in POPs, winds will have to be monitored as 700 mb winds aloft increase to around 20-30 kts with lighter synoptic winds expected until then. MacKay && .AIR QUALITY... Patchy wildfire smoke from regional wildfires across the WRN CONUS will continue through the weekend as evident by the latest HRRR- Smoke model which keeps light concentrations of smoke in place. As a result, have added the mention of patchy smoke to the forecast regionwide which will lead to hazy/smoky skies at times. Air quality as of 230 AM MDT remains in the "Good" to "Moderate" categories. MacKay && .PIH WATCHES/WARNINGS/ADVISORIES... Heat Advisory until midnight MDT tonight for IDZ051. &&
Preliminary Local Storm Report
National Weather Service Pocatello ID
515 PM MDT Sat Jul 20 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0648 PM Tstm Wnd Dmg Blackfoot 43.19N 112.35W
07/19/2024 Bingham ID Public
Window broken by flying tree limb. Power
out. Time estimated based on radar and
surrounding reports.
&&
KSmithPreliminary Local Storm Report
National Weather Service Pocatello ID
519 PM MDT Sat Jul 20 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0622 PM Tstm Wnd Dmg 1 E Rockford 43.18N 112.53W
07/19/2024 Bingham ID Public
Large pine tree uprooted and down on a
fence. Report and photo received from the
public via the NWS Pocatello Facebook page.
Time estimated based on radar and
surrounding reports.
&&
KSmithPreliminary Local Storm Report...Summary
National Weather Service Pocatello ID
924 PM MDT Sat Jul 20 2024
...UPDATED CHRONOLOGICAL SUMMARY OF THUNDERSTORM WIND GUST AND
THUNDERSTORM WIND DAMAGE REPORTS ACROSS SOUTHEAST IDAHO FROM THE
AFTERNOON AND EVENING OF FRIDAY, JULY 19, 2024...
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0410 PM Tstm Wnd Gst 1 ENE Howe 43.78N 112.98W
07/19/2024 M46 MPH Butte ID Mesonet
Mesonet station HOW.
0510 PM Tstm Wnd Gst 12 SE Butte City 43.50N 113.05W
07/19/2024 M49 MPH Butte ID Mesonet
Mesonet station RWM - INL Radioactive Waste
Mgmt.
0520 PM Tstm Wnd Gst 12 NW Atomic City 43.55N 113.01W
07/19/2024 M50 MPH Butte ID Mesonet
Mesonet station LOS - Lost River Rest Area.
0535 PM Tstm Wnd Gst 3 W Taber 43.32N 112.69W
07/19/2024 M53 MPH Bingham ID Mesonet
Mesonet station TAB.
0535 PM Tstm Wnd Gst 9 NW Atomic City 43.53N 112.95W
07/19/2024 M47 MPH Butte ID Mesonet
Mesonet station 690 - INL Central
Facilities.
0552 PM Tstm Wnd Dmg 3 E Taber 43.32N 112.57W
07/19/2024 Bingham ID 911 Call Center
Updated...Bingham County 911 reports 5 power
poles snapped off along N 1400 W in the area
of US-26 also causing a fire. Time estimated
based on radar.
0605 PM Tstm Wnd Gst Atomic City 43.44N 112.81W
07/19/2024 M55 MPH Bingham ID Mesonet
Mesonet station ATO.
0610 PM Tstm Wnd Dmg 3 NNW Rockford 43.23N 112.57W
07/19/2024 Bingham ID Public
Large tree down near the intersection of W
200 N and N 1400 W. Time estimated based on
radar.
0620 PM Tstm Wnd Dmg 1 NE Rockford 43.19N 112.53W
07/19/2024 Bingham ID Public
Numerous shingles blown off residential roof
along ID-39 in Rockford. Time estimated
based on radar.
0622 PM Tstm Wnd Dmg 1 E Rockford 43.18N 112.53W
07/19/2024 Bingham ID Public
Large pine tree uprooted and down on a
fence. Report and photo received from the
public via the NWS Pocatello Facebook page.
Time estimated based on radar and
surrounding reports.
0643 PM Tstm Wnd Dmg 2 NNW Blackfoot 43.23N 112.37W
07/19/2024 Bingham ID Public
Large tree limbs down on the north side of
Groveland. Time estimated based on radar.
0646 PM Tstm Wnd Dmg 1 WSW Blackfoot 43.19N 112.37W
07/19/2024 Bingham ID Public
Large pine tree uprooted on the corner of W
center St and Lansing St. Time estimated
based on radar.
0647 PM Tstm Wnd Dmg 1 ESE Blackfoot 43.19N 112.32W
07/19/2024 Bingham ID Utility Company
Idaho Power reports approximately 7,700
customers without power from Gibson, to
Blackfoot, to Wapello.
0648 PM Tstm Wnd Dmg Blackfoot 43.19N 112.35W
07/19/2024 Bingham ID Public
Window broken by flying tree limb. Power
out. Time estimated based on radar and
surrounding reports.
0649 PM Tstm Wnd Dmg 1 SSW Blackfoot 43.18N 112.35W
07/19/2024 Bingham ID Public
Large tree limbs down along S Broadway St in
the area of the RV park. Time estimated
based on radar.
0649 PM Tstm Wnd Dmg 1 SW Blackfoot 43.18N 112.36W
07/19/2024 Bingham ID Public
Large tree uprooted and down on a truck near
the intersection of Dennis St and Opal St.
Extent of any vehicle damage unknown. Report
and photos obtained from social media. Time
estimated based on radar and surrounding
reports.
0649 PM Tstm Wnd Dmg 1 S Blackfoot 43.18N 112.35W
07/19/2024 Bingham ID Public
Large section of tree down at Blackfoot High
School. Time estimated based on radar and
surrounding reports.
0650 PM Tstm Wnd Dmg 1 SSW Blackfoot 43.18N 112.36W
07/19/2024 Bingham ID 911 Call Center
Bingham County 911 reports multiple calls
for trees and wires down concentrated across
southern parts of the City of Blackfoot.
Time estimated based on radar.
0650 PM Tstm Wnd Dmg 1 SSE Blackfoot 43.18N 112.34W
07/19/2024 Bingham ID Public
Large section of tree down knocking down a
wood stockade fence and damaging a swing set
along Pendlebury Ln. Power out. Report and
photos via social media. Time estimated
based on radar.
0655 PM Tstm Wnd Dmg 2 SE Blackfoot 43.17N 112.32W
07/19/2024 Bingham ID Public
2 trees reported down on River Ranch Rd via
social media. Time estimated based on radar.
0715 PM Tstm Wnd Gst 1 SW Gibson 43.07N 112.43W
07/19/2024 M59 MPH Bingham ID Mesonet
Mesonet station FTHI.
0720 PM Tstm Wnd Gst 10 NNW Berenice 43.97N 113.05W
07/19/2024 M45 MPH Butte ID Mesonet
Mesonet station PC400 - North Creek Road.
0915 PM Tstm Wnd Gst 5 WSW Craters of Moon 43.41N 113.63W
07/19/2024 M45 MPH Butte ID Dept of Highways
ITD RWIS station ITD77 - Tom Cat Summit
US-20.
&&
KSmithThe Pocatello radar (KSFX), 75 km away, was scanning. The volume nearest the first event began at 03:51 UTC.
1 thunderstorm wind. Local standard time, as filed.
Power lines were downed off of Highway Drive in the areas of US 20 which caused a fire and several power outages.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2024Every state in 2024This day in weather historyWarnings in Idaho, July 2024
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: 1206924.