Idaho, 2020

High Wind in Idaho, September 7 to 8, 2020

September 7 to 8, 2020 · NWS PIH · 15 events in 15 counties and zones

A strong cold front passed through eastern Idaho shifting southerly winds to northeasterly with sustained speeds over 40 mph and gusts over 50 mph widespread. Extensive traffic problems and damage occurred.

Where it happened

Every event with a place to put it; 15 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
2
Property damage
$300,000
Crop damage
None recorded
Events
15

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.

What happened

The episode as NWS PIH wrote it up.

A strong cold front passed through eastern Idaho shifting southerly winds to northeasterly with sustained speeds over 40 mph and gusts over 50 mph widespread. Extensive traffic problems and damage occurred.

What forecasters said that day

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 Sep 7, 8:39 AM MST, 3 hours 21 minutes earlier.

Area forecast discussion, Sep 7, 8:39 AM MST, 3 hours 21 minutes before
Area Forecast Discussion
National Weather Service Pocatello ID
939 AM MDT Mon Sep 7 2020

.UPDATE...
Minor updates this morning to add a small area of isolated
thunderstorms to east Idaho this afternoon as well as to add
mention of blowing dust into the mix associated with strong winds
ahead of and behind strong cold front. Confidence in the blowing
dust is not high ahead of the front and remains that way behind
that front; as we mix in the chance for some moisture. However,
some forecast models are still showing a pretty substantial plume
of dust.

ND

&&

.PREV DISCUSSION... /issued 422 AM MDT Mon Sep 7 2020/

..EXTREMELY STRONG COLD FRONT PASSAGE TODAY...

SHORT TERM...Today through Wednesday night.
Very strong cold front passage today will be the driver of
several impacts over East Idaho. Breezy to locally windy
conditions in place ahead of the front, especially as surface
gradient rapidly tightens mid-day. Some of these winds are likely
to reach Advisory levels. Frontal passage should be very
pronounced as it drops from the north through the region beginning
mid afternoon and exiting the region at the Utah border by mid
evening. Passage should be accompanied by a wind shift to the
north or northeast and significant speed increase, both of which
should occur quite rapidly. Also accompanying the front will be a
rapid drop in temperature, some 20+ degrees over no more than 2-3
hours. Although the surface gradient behind the front is
impressively steep, the more impressive feature is the 50+kt winds
just off the surface, supported by most of the model data. Also
impressive is the sustained wind speeds approaching or exceeding
50kt in the GFS numerical guidance in portions of the area. Aside
from the expected speeds, north direction makes this a rare event.
Will keep the High Wind Warning in place, expecting that Advisory
level winds may continue past current expiration of 05Z, at least
through the Snake Plain. Wind Advisories continue elsewhere,
though trouble spot may be across portions of the southern
highlands after 00Z, where the GFS guidance was placing the 50kt
sustained speeds. Some of this region may need to be updated to
High Wind Warning with an eye toward the Raft River zone where
I-84 traverses the region.

Some showers also accompany the front, and snow levels drop
associated with the colder temperatures. especially across the
highlands east of I-15. Would not be surprised to see an
overachiever produce a few lightning strikes, especially given the
vigorous dynamics expected today. Storm movement would be
sufficient to produce isolated severe gusts. Precipitation amounts
are expected to be light, and snow amounts should be less than
advisory concerns, especially since ground temps are still quite
warm. Overnight lows, however, do start to become a concern.
Freeze Watch still looks reasonable for Tuesday morning. May need
to look further into additional Frost or Freeze headlines for
Wednesday morning for portions of the East Idaho growing zones. A
few areas in the Upper portions of the Snake Plain may actually
fall cold enough to warrant a Hard Freeze. Will hold off on that
for now. Remainder of the short term characterized by generally
dry conditions as upper low wraps up over Utah, leaving East Idaho
in cool dry northeast flow. DMH

LONG TERM...Thursday through Monday.
After all the impacts in the short term, the rest of the forecast
influenced by building high pressure. Upper ridge redevelops
through the Intermountain West into the weekend. Temperatures
warm back toward seasonable levels with minimal wind concerns, and
no precipitation. DMH

AVIATION...
A very strong cold front is forecast to drop from N to S across SE
Idaho this afternoon/eve, leading to increasingly dangerous
conditions for aviation due to wind. Winds will increase early this
afternoon initially out of the WSW at KBYI/KPIH/KIDA (earliest at
KBYI), but are then forecast to rapidly shift to the N/NE and
increase behind the front, potentially exceeding 35G45kts at the sfc
at all 3 terminals (and even stronger aloft). KSUN/KDIJ will also
quickly swing around from S or SW to WNW exceeding 20G30kts. These
will potentially be some of the strongest winds we have observed
this year for SE Idaho, AND will be coming in from an unusual
direction...all aviation interests will want to closely monitor sfc
obs and be aware of likely crosswind, headwind, and tailwind
hazards. Will continue to refine timing on all of this for each
terminal in the 12z TAF package based on the latest high-res
guidance. Overall confidence in the occurrence of high winds and wind
shift to north is high, with moderate confidence on timing as
reflected in the TAFs. Showers will also be possible along the
front, and these themselves may mix down unusually strong/gusty
winds. The winds will gradually relax between sunset and 3 AM Tues,
generally out of the N. At this time, cigs/vsbys are expected to
remain VFR throughout the event, although we can't rule out a snow
shower behind the front early Tues AM at KDIJ. Skies will gradually
clear Tues with much lighter winds/VFR conditions. - KSmith

FIRE WEATHER...
Warm, dry, and increasingly windy conditions expected today,
therefore Red Flag Warnings remain in place across most of the
East Idaho fire districts. Very strong cold front drops north to
south across the region this afternoon and evening. Extremely
rapid wind shift to the north or northeast is expected as the
front slides through. Behind the front, look for a significant
increase in wind speeds well above red flag thresholds. Gusts
through the Arco Desert may approach 70 mph late this afternoon
and evening. The strongest winds should be between 3pm-midnight
most areas. A rapid drop in temperatures behind the front will
also bring a rapid rise in humidities, but these changes will be
almost completely negated by the wind changes. A few showers and a
thunderstorm or two may also be possible, but precipitation should
be light and generally isolated in coverage. Snow levels could
fall as low as 6000 feet, especially across the Caribou-Targhee
NF, which may be able to produce very light accumulations across
higher elevations. DMH

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Red Flag Warning until 11 PM MDT this evening for IDZ410-413-425-
427.

Wind Advisory from 2 PM this afternoon to 11 PM MDT this evening
for IDZ051-055>066-068>071-074-075.

High Wind Warning from 2 PM this afternoon to 11 PM MDT this
evening for IDZ052>054-067.

Freeze Watch from late tonight through Tuesday morning for
IDZ052-053.

&&

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

15 high wind. Local standard time, as filed.

High Wind, Franklin-Eastern Oneida Region

When
September 7, 12:00 PM MST to 10:00 PM MST
Where
Franklin-Eastern Oneida Region forecast zone
Measured
45 kt (52 mph) measured gust
Injuries
0 direct, 2 indirect
Reported by
Law Enforcement
Coordinates
42.188, -112.176 (the zone’s center; the record gives no point)

A SUV pulling a camper/trailer overturned on interstate 15 south of Malad Summit due to high crosswinds. The two passengers suffered minor injuries. A 52 mph wind speed was measured 4 miles east southeast of Weston at 7:49 PM MDT. A metal roof was blown off a hay barn in Clifton at around 745 pm MDT.

High Wind, Sawtooth-Stanley Basin

When
September 7, 12:00 PM MST to September 8, 4:00 AM MST
Where
Sawtooth-Stanley Basin forecast zone
Measured
56 kt (64 mph) estimated gust
Reported by
Law Enforcement
Coordinates
43.826, -114.131 (the zone’s center; the record gives no point)

Sawtooth search and rescue reported more than 30 trees down across the Stanley Basin area with back country roads blocked. The Beaver Creek area was especially hard hit.

High Wind, Wood River Foothills

When
September 7, 1:00 PM MST to September 8, 4:00 AM MST
Where
Wood River Foothills forecast zone
Measured
40 kt (46 mph) estimated sustained
Reported by
Mesonet
Coordinates
43.412, -113.980 (the zone’s center; the record gives no point)

Strong northeast winds occurred with the public reporting a 55 mph gust near Gannett and the mesonet reporting 50 mph just west of Hailey. Large tree limbs being shorn off trees reported in Bellevue.

High Wind, Arco-Mud Lake Desert

When
September 7, 2:00 PM MST to September 8, 5:00 AM MST
Where
Arco-Mud Lake Desert forecast zone
Measured
67 kt (77 mph) measured gust
Property damage
$300,000
Reported by
Mesonet
Coordinates
43.537, -112.374 (the zone’s center; the record gives no point)

A powerful cold front brought damaging winds to the Arco-Mud Lake Desert region. A 77 mph wind gust was measured 6 miles northwest of Atomic City with 73 mph 12 miles east of Howe. 40 to 50 mph sustained winds were recorded for several hours. Several mesonet sites also recorded 60 to 70 mph gusts during the event. A front porch roof was ripped off a residence in Monteview at around 5 pm MDT. A power pole was snapped in half 8 miles northwest of Monteview. Large tree uprooted 3 miles north of Monteview with numerous tree limbs down along Monteview Highway. Powerlines were reported downed with power out in Mud Lake. Most of this damage reported at around the 5 pm MDT hour. Several power poles and trees downed along Idaho Higway 33 near Terreton. A large tree was downed on a house in Terreton as well. A wind profiler was destroyed at one of the Idaho National Laboratory mesonet sites estimated 200 thusand dollars damage.

High Wind, Beaverhead-Lemhi Highlands

When
September 7, 2:00 PM MST to September 8, 5:00 AM MST
Where
Beaverhead-Lemhi Highlands forecast zone
Measured
63 kt (72 mph) measured gust
Reported by
Mesonet
Coordinates
44.004, -112.761 (the zone’s center; the record gives no point)

A 72 mph wind gust measured at the mesonet site 18 miles north northeast of Berniece. 71 mph was measured 4 miles south southeast of Spencer. And several 60 to 66 mph gusts measured near Dubois.

High Wind, Blackfoot Mountains

When
September 7, 2:00 PM MST to September 8, 3:00 AM MST
Where
Blackfoot Mountains forecast zone
Measured
39 kt (45 mph) estimated sustained
Reported by
Public
Coordinates
43.125, -111.858 (the zone’s center; the record gives no point)

Several small branches off trees reported downed in Soda Springs at 645 pm MDT and a large tree reported down in Bancroft at approximately 9 pm MDT.

High Wind, Eastern Magic Valley

When
September 7, 2:00 PM MST to September 8, 4:00 AM MST
Where
Eastern Magic Valley forecast zone
Measured
63 kt (72 mph) measured gust
Reported by
Mesonet
Coordinates
42.811, -113.514 (the zone’s center; the record gives no point)

Widespread 40 to 50 mph sustained winds with gusts as high as 73 mph affected the Eastern Magic Valley on Labor Day. The UPR site 8 miles north of Coldwater recorded a 73 mph gust with 71 mph at the RAWS at Raft River and 68 mph 6 miles west northwest of Minidoka. Multiple trees and power lines down at the Rupert Idaho Youth Ranch. One large tree was uprooted and down on a residence. Time estimated at 6:30 PN MDT. Several power outages also reported in Rupert. A pine tree was blown down near Milner Dam 11 miles west of Burley around 8:10 Pm MDT. Damage to outbuildings and sheds reported in Declo around 8:15 PM MDT. A large tree was reported down in Burley at 8:30 PM. A large pine tree was uprooted in Springdale area 3 miles west of Declo at 8:30 PM MDT. Numerous trees and tree limbs reported down in Rupert and Minidoka by the public at 9 PM. United Electirc CO-OP reported numerous power outages in Burley, Paul, Acequia, Rupert and Heyburn due to the wind damage. Large tree rported down in Heyburn at 9 PM.

High Wind, Lost River Valleys

When
September 7, 2:00 PM MST to 11:00 PM MST
Where
Lost River Valleys forecast zone
Measured
58 kt (67 mph) measured gust
Reported by
Mesonet
Coordinates
43.982, -113.727 (the zone’s center; the record gives no point)

Sustained winds reached 40 to 50 mph with gusts as high as 67 mph at Dead Man Canyon. Damaging winds reported between Arco and Darlington with 2 large trees reported down in Moore at 5:27 PM MDT. AT 5: 54 PM MDT several trees reported down between Mackay and Darlington with one tree lying across Highway 93 in Mackay. A tree was also reported on a powerline in Moore with many downed trees 10 to 12 inches in diameter.

High Wind, Lower Snake River Plain

When
September 7, 2:00 PM MST to September 8, 4:00 AM MST
Where
Lower Snake River Plain forecast zone
Measured
62 kt (71 mph) measured gust
Reported by
Mesonet
Coordinates
42.860, -112.488 (the zone’s center; the record gives no point)

A strong cold frontal passage brought sustained northeast winds of 40 to 50 mph at times with gusts over 60 mph. The Aberdeen mesonet recorded 66 mph and 1 mile east northeast of Aberdeen recorded the peak of 71 mph. The Pocatello ASOS recorded a gust of 64 mph at 5:28 PM. Many damage reports occurred by the Public and spotters. |4:20 PM MDT...1 dozen trees downed at Grove City Cemetery in Blackfoot| ...Metal roof peeled off barn in Moreland. |4:30 PM MDT...Cinder block wall knocked down in part of house in Basalt.| ...Large tree downed and snapped just above the base in Firth.|4:40 PM MDT ...Multiple trees downed across Shelley including at Shelley city park| and near Infinity Dance Studio. Large tree down on vehicle and | residence.|4:50 PM MDT...Large tree down in Firth crushing a SUV and pickup truck. Tree limbs| and power lines down all over area. |4>55 PM MDT...Multiple power poles snapped off and blocking Ferry Butte Rd. 4 miles| northwest of Gibson. |5:00 PM MDT...Report of a tree down on a home in Tyhee region 2 miles north of | Chubbuck causing minor damage. | ...Extensive roof damage to a home in Riverside 2 miles south southeast| of Moreland due to a tree falling on it. | ...3 miles south southwest of Moreland a very large tree fell into a | residence destroying most of the roof and second floor. Additional | damage in vicinity of W 100 S and S 900 W. | ....Power lines down 1 mile east of Pingree. | ...A large storage building sustained significant roof and wall damage | 3 miles east of Rockford. |5:05 PM MDT....At least 37 treees uprooted in FMC park in northwest Pocatello| 2 miles east of Michaud. | ...Large pine tree down on house in Pingree. |5:15 PM MDT...Very large tree uprooted at Rich Lane in Blackfoot| ...Large pine tree down at Riverton Road and Lansing in Blackfoot| blocking road. | ....Tree resting on top of powerline at Thomas Road and 100 South| in Blackfoot. | ....Several large trees reported downed in Moreland. |5:30 PM MDT....Multiple reports of new fire starts in Pocatello due to downed power| lines and sparking transformers. | ...Cattle barn collapsed along Idaho 39 just south of W 1400 S 3 miles | north of Aberdeen. | ...Large downed tree 2 miles east of Chubbuck. | ...Power pole snapped off along W 100 S in the Thomas area| 2 miles east of Rockford. |5:40-5:50 PM...At least 10 power lines down near South 2nd Avenue and Fredregull Rd in Pocatello. Large tree uprooted next to Chubbuck Police Department taking down a power pole and transformer across Highwy Ave. Large trees uprooted along W Reservation Road 3 miles north of Chubbuck. | |5:50-6:00 PM...Multiple snapped and uprooted trees throughout Aberdeen. Large tree down along Groveland Road in Blackfoot. Large tree uprooted near the intersection of W Chubbuck Rd and N Philbin Rd. Numerous tree limbs down. Trees down on N Manning Ln and also N Moonglow Ln in Chubbuck. Portion of metal roof blown off residence along Cutshalts Rod 4 miles NNO of Chubbuck. Multiple large trees uprooted or snapped off along N Laughran Rd between W Siphon Rd and W Reservation Rd. Shingles peeled off a residence. Widespread tree limbs down. Metal roof blown off a residence on Reservation Rd between N Laughran Rd and N Rio Vista Rd. Building under construction collapsed behind Ace Hardware in Aberdeen. Tree down along Hiline Rd south of Edmo Rd in Fort Hall. Large tree down blocking W Bullard Rd just west of N Hwthorne Rd 3 miles south southwest of fort Hall. 2 trees down and wooden fence blown down 3 miles east of Pocatello. Large, Mature pine tree uprooted in the city of American Falls. 3 trees down at Restlawn Cemetery/Memorial Gardens in Pocatello.

6:10-6:30 PM... Uprooted Russian olive tree at 7th and East Young Streets in Pocatello. 59 to 60 foot tree uprooted on Vista Dr in Pocatello. Large tree limbs down including along E Chapel Rd and along Wilson Ave in Pocatello. 4 large trees uprooted at a property between American Falls and Aberdeen.

6:50 PM..........Sections of metal roof peeled off an outbuilding in Highland Meadows area of Chubbuck. NWS employee reported tree damage and damage to home in Moreland. 7:15 PM...Numerous 6 inch diameter tree limbs down in Moreland.

7:25-8:00 PM...Traffic lights down at Main and Garrett Way in Pocatello. Large tree down on a house along Williams Ave near Syringa elementary school in Pocatello. Large spruce tree down on Ada Ave in Pocatello. Numerous large trees reported down in Blackfoot including blocking roads and power lines down.

8:15 PM....Large tree down taking down a wooden fence and power lines on E 825 N near N 675 E in Basalt. Large tree down in Hawthorne Park in Pocatello.

11:55 PM...Multiple large trees uprooted or snapped off at Pocatello Regional Airport.

1:15-130 AM...Large, mature trees were uprooted and fell on two neighboring homes on Lee St in American Falls. Roof damage to 2 residences and 1 garage off of Government Rd in Machaud. Portions of multiple trees and numerous limbs down. 2 miles west of Pocatello airport multiple tree limbs down in vicinity of Falcon Circle E and Falcon Circle N with minor damage to an outbuilding.

2:00 AM....Large Box Elder tree uprooted destroying part of a wood deck near intersection of Tyhee Rd and N Rio Vista Rd. in west Pocatello. |2:50 AM....Two additional large trees uprooted along Tyhee Ave in American Falls.

Multiple other damage reports reported after the fact during the morning of September 8th of trees downed and minor residence damages and power lines down.

Monetary damage reports still being gathered but estimated over a million dollars.

High Wind, Marsh and Arbon Highlands

When
September 7, 2:00 PM MST to September 8, 5:00 AM MST
Where
Marsh and Arbon Highlands forecast zone
Measured
39 kt (45 mph) estimated sustained
Reported by
COOP Observer
Coordinates
42.838, -112.256 (the zone’s center; the record gives no point)

Trees and large limbs reported down in Inkom by COOP observer and a small 2 X 4 wood and sheet metal outbuilding destroyed. Multiple trees downed at a ranch/residence along Old Arbon Valley Rd south of Gardner Rd. Portions of a roof and sides blown off a large barn at Windy Acres Farm.

High Wind, Raft River Region

When
September 7, 2:00 PM MST to September 8, 5:00 AM MST
Where
Raft River Region forecast zone
Measured
63 kt (72 mph) measured gust
Reported by
Mesonet
Coordinates
42.391, -112.994 (the zone’s center; the record gives no point)

Forty to 50 mph sustained winds along with peak gusts of 73 mph 9 miles west of Black Pine, and 69 mph at the Yale ITD site brought some damage to the Raft River region. An Irrigation pivot was blown over along E Heglar Canyon Rd near Heglar.

High Wind, Shoshone-Lava Beds

When
September 7, 2:00 PM MST to September 8, 5:00 AM MST
Where
Shoshone-Lava Beds forecast zone
Measured
54 kt (62 mph) measured gust
Reported by
Mesonet
Coordinates
43.089, -113.918 (the zone’s center; the record gives no point)

A strong cold front brought sustained winds of 40 mph out of the northeast with a peak gust of 62 mph 13 miles south of Craters of the Moon. 50 to 60 mph gusts were reported in Richfield. Tree limbs and power lines were reported down in Shoshone by 7:30 PM MDT.

High Wind, Southern Hills-Albion Mountains

When
September 7, 2:00 PM MST to September 8, 4:00 AM MST
Where
Southern Hills-Albion Mountains forecast zone
Measured
54 kt (62 mph) measured gust
Reported by
Mesonet
Coordinates
42.284, -113.600 (the zone’s center; the record gives no point)

Strong northerly winds were sustained over 40 mph with a peak gust of 62 mph 4 miles east southeast of Basin. Gust of 50 to 60 mph were common. An outbuilding was reported blown over along S Elba Almo Rd in Almo.

High Wind, Teton Valley

When
September 7, 2:00 PM MST to September 8, 4:00 AM MST
Where
Teton Valley forecast zone
Measured
39 kt (45 mph) estimated sustained
Reported by
Newspaper
Coordinates
43.924, -111.450 (the zone’s center; the record gives no point)

A pine tree was reported snapped off just above the base in Ashton.

High Wind, Upper Snake River Plain

When
September 7, 2:00 PM MST to September 8, 4:00 AM MST
Where
Upper Snake River Plain forecast zone
Measured
56 kt (64 mph) measured gust
Reported by
Mesonet
Coordinates
43.805, -111.767 (the zone’s center; the record gives no point)

A powerful cold front shifted winds to the northeast and sustained over 40 mph with gusts over 60 mph. The peak gust was 65 mph 12 miles west of Osgood with the Idaho Falls ASOS recording 62 mph. Extensive damage reported as well by the public...law enforcement and spotters. |4:30 PM MDT.....Large tree down on a garage in Idaho Falls. 45 foot by 25 foot high metal roof structure flipped from ground anchors and blown into neighbors pasture breaking rhough a wooden fence 5 miles east northeast of Shelley. Two powerlines downed at interseciton of Woodruff and Lincoln Roads in Idaho Falls. |Approximately 4:45 PM MDT the public witnessed a flying tree branch shatter a windshield of a Suburban along N 55th E in Idaho Falls. |5:30-6 PM MDT....A large tree downed in Newdale. A metal storage shed blown over in Rigby. Large tree limbs and power lines across the road on N 4300 E near County Line Rd west of Ririe. Top portion of power pole and large tree snapped off in Rigby. |By 6:15 PM numerous reports of large trees and tree limbs down throughout Rigby. By 6:30 PM 3,000 customers without power in Idaho Falls reported by Rocky Mountain Power. Widspread reports of trees and power lines down by 7: 15 PM in Rexburg and Madison County. Tree damage and damage to outbuildings at Mountain River Campground in the Heise area near Poplar. |8:00 PM MDT....Tree downed on vehicle on Clubhouse Circle off of St Clair Rd in Idaho Falls. Trees and power lines reported down in Lewisville. A portion of hay barn collapsed in Menan with siding removed from a residence. 8:30-9:00 PM MDT in Rexburg....Multiple trees uprooted. An awning broke off and smashed a glass door to a business. Traffic lights out in the city of Rexburg. 2 trees uprooted at a Rexburg bench residence. |9:45 PM -10:00 PM MDT....A small airplane flipped over at the Idaho Falls regional airport. Idaho State University emergency management reported 4 trees down along with siding damage to a building at their Idaho Falls campus. Over 14,000 Rocky Mountain Power customers without power north of Idaho Falls due to the wqind damage including over 8,000 in the Rexburg area. At 10:45 Pm a sign blown out at the Rexburg Grease Monkey.

Many reports of large trees down in Madison County in the Rexburg, Archer and Thornton areas. Large uprooted trees damaged headstones in Cemetery in Burton near Thornton. US Highway 20 blocked at 2 am MDT just west of Idaho Falls due to downed power lines between New Sweden School Rd and Old Butte Highway.

Several more unspecified reports of damage occurring with no time frame of when it occurred were received. This included a barn destroyed in Ucon, Trees on homes, vehicles, outbuldings destroyed in Ammon and Idaho Falls.

Detailed monetary damages still being gathered.

What these are

High Wind
Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Idaho in 2020Every state in 2020This day in weather historyWarnings in Idaho, September 2020

Sources

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: 922708, 922808, 922825, 922709, 922757, 922762, 922785, 922788, 922805, 922806, 922807, 922809, 922810, 922822, 922824.