Idaho, 2022

Wildfire in Idaho, September 4 to 6, 2022

September 4 to 6, 2022 · NWS PIH · 1 event in 1 county or zone

A fire began on September 4th in the Morgan's Bridge area of eastern Bingham County and reached 1,300 acres and was fully contained on September 6th. The fire threatened power lines but no homes or structures.

Where it happened

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

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 fire began on September 4th in the Morgan's Bridge area of eastern Bingham County and reached 1,300 acres and was fully contained on September 6th. The fire threatened power lines but no homes or structures.

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 4, 1:54 AM MST, 11 hours 6 minutes earlier.

Area forecast discussion, Sep 4, 1:54 AM MST, 11 hours 6 minutes before
Area Forecast Discussion
National Weather Service Pocatello ID
254 AM MDT Sun Sep 4 2022

.SHORT TERM...Today through Monday night.
Concerns remain ongoing unseasonable warmth and gusty winds under
slightly-flattened ridge from passage of dry shortwave trough
Saturday. Temperatures down today some 3-5 degrees from
yesterday's records, still well above normal for early September.
Very dry air mass and clear skies continue to allow steep lapse
rates, so mixing to above 10k feet expected to tap into mid level
winds some 25-30kts for gust potential. The gusty winds and very
dry humidities lead to fire concerns; see discussion below.
Otherwise, strong high pressure remains anchored over the Great
Basin, and forecast highs remain 95+ through the short term for
most lower elevation communities. Triple digit highs are not
favored, though approached, with probabilities holding in single
digits for our typically warmest locales for both today and Labor
Day. Heat Advisories will remain in effect, especially with an eye
toward midweek as temperatures rebound again. DMH

.LONG TERM...Tuesday through next Sunday.
Broad upper level ridging continues through midweek next week as a
region of high pressure centered over Utah brings continued well
above normal temperatures past Labor Day. Afternoon highs Tuesday
and Wednesday will be in the low 90s to 105 with Heat Risk concerns
extending through Wednesday. The current Heat Advisory remains in
effect through Tuesday night and will need to be expanded through
Wednesday to capture this high confidence record heat wave across
eastern Idaho. Wednesday will also be the warmest day next week with
afternoon highs of 95 to 105 for all major population centers.
Visitors and residents are encouraged to continue practicing heat
safety to take advantage of this prolonged period of dry weather
outdoors safely. Conditions begin to change for Thursday and Friday
associated with a disturbance to the north helping to drive up winds
and bring slight relief to these very warm conditions.

Ensemble clusters continue to increase in confidence surrounding for
an upper level trough passing through northern Idaho and Montana
late in the day on Thursday into Friday as a mostly dry cold front
here across southern Idaho. Winds will increase up to around 25 to
45 mph with isolated precipitation chances around the Island Park
Basin and Continental Divide. High temperatures Thursday will see
some relief ahead of the frontal passage with temperatures falling
by around 5 to 10 degrees into the upper 80s and 90s. Behind the
front, temperatures Friday through the weekend will continue to
slowly fall as temperatures return to more near normal to slightly
above conditions in the 70s and low 80s. Conditions will remain dry
for Friday in between systems with the potential for active weather
returning around that Sunday/Monday timeframe.

The eastern Pacific tropical weather season has begun to pick up
speed with a current named Tropical Storm Javier tracking out to sea
with greater interest for our region in the disturbance developing
behind it. The current location of this system is about 2,000 miles
to our south with changes likely to the track of the storm, but with
the current forecast showing this disturbance intensifying
approaching southern California we could see moisture impacts as
this storm weakens and precipitation impacts moves inland. The track
for this moisture will be between a broad upper level trough over
the Pacific and a departing upper level ridge to the east which will
help to support and accentuate moisture reaching Idaho. This is
represented in the forecast with widespread light POPs returning for
Sunday into Monday all across the region. We will continue to
monitor this storm as it tracks north with any moisture most
certainly welcomed. MacKay

&&

.AVIATION...For the 12Z TAFS through 12Z Labor Day.
Predominant VFR conditions continue through midweek next week
underneath a ridge of high pressure centered over the Great Basin. A
passing disturbance working through Montana today will elevate
afternoon winds out of the W/SW between 10 to 20 kts with gusts of
20 to 30 kts for all terminals outside of KBYI where winds look to
remain less than 15 to 20 kts. Winds will remain elevated through
sunset dropping down below 12 kts for the overnight hours. Outside
of patchy HZ/FU and FEW clouds above 25,000 feet, skies remain clear
with hot and dry weather continuing. MacKay

&&

.FIRE WEATHER...Winds will remain gusty today behind Saturday
shortwave feature while humidities remain very dry under the
influence of strong high pressure anchored across the Great Basin.
The strongest winds are expected from the Northern Sawtooth into
the entirety of the Snake River Plain and also including the
Targhee NF. A Red Flag Warning remains in place for Idaho Fire
Zones 422/425/410 and 411 today. The ridge axis strengthens for
Tuesday/Wednesday, continuing the threat for unseasonably hot
conditions and very dry humidities. Inversions, thermal belts and
poor overnight recovery are expected to remain in place. There is
increasing confidence in breakdown of the ridge by Thursday with a
mostly dry frontal system driving through during the day. Details
continue to fluctuate, but trend has been to limit precipitation
to areas along the Divide. Gusty winds will return, but relief
from the unseasonable heat is expected by the weekend with
temperatures returning closer to seasonal normals. DMH

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until midnight MDT Tuesday night for IDZ051>059-
075.

Red Flag Warning from noon today to 9 PM MDT this evening for
IDZ410-411-422-425.

&&

The radar

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

Open the radar archive at this moment

Event by event

1 wildfire. Local standard time, as filed.

Wildfire, Blackfoot Mountains

When
September 4, 1:00 PM MST to September 6, 8:00 PM MST
Where
Blackfoot Mountains forecast zone
Reported by
Park/Forest Service
Coordinates
43.125, -111.858 (the zone’s center; the record gives no point)

A fire began on September 4th in the Morgan's Bridge area of eastern Bingham County and reached 1,300 acres and was fully contained on September 6th. The fire threatened power lines but no homes or structures.

What these are

Wildfire
A fire burning in wildland vegetation, with its acreage and damage where known.

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

The same day elsewhere

More

Every storm in Idaho in 2022Every state in 2022This day in weather historyWarnings in Idaho, September 2022

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: 1057193.