Idaho, 2017Winter Storm in Idaho, March 4 to 6, 2017
March 4 to 6, 2017 · NWS PIH · 3 events in 3 counties and zones
Snow and winds caused road closures and lost snow mobiles due to restricted visibility with search and rescue needed in Franklin County to find a lost individual.
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 3
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.
Snow and winds caused road closures and lost snow mobiles due to restricted visibility with search and rescue needed in Franklin County to find a lost individual.
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 Mar 4, 2:36 PM MST, 3 hours 24 minutes earlier.
Area forecast discussion, Mar 4, 2:36 PM MST, 3 hours 24 minutes before
Area Forecast Discussion
National Weather Service Pocatello ID
236 PM MST Sat Mar 4 2017
.SHORT TERM...There is a little extra digging of the low pressure
system moving inland, causing timing to be a little slower. The
surface low is developing east of the Cascades and the front is
expected to enter the Central Mountains Sunday morning and move
east of Idaho Falls and Pocatello by Sunday evening. Meanwhile,
clouds and precipitation have spread over the mountains around Sun
Valley, Challis, and Stanley today. A Winter Weather Advisory was
issued for the Eastern Highlands Sunday. Snow fall amounts look
to be up to seven inches above 6500 feet elevation, 2 to 4 inches
below that through the day Sunday into early Monday morning. Brisk
winds also expected ahead of and behind the front. Temperatures
have warmed well above freezing in portions of the Eastern Magic
Valley and Lower Snake Plain. Rain and snow will accompany the
front on Sunday, perhaps a couple of tenths of liquid water
equivalent with rain on snow to bring more threat of flooding.
This storm system moves east of this area by Monday evening,
leaving more scattered showers in westerly flow over the
mountains. RS
.LONG TERM...Tuesday night through next Saturday night. System is
forecast to be exiting the region Tuesday night with widespread
mountain snow showers decreasing, particularly over the Eastern
Highlands. Snow showers may linger over the Sawtooths through
Wednesday, but activity should be light and showery. Southwest flow
is forecast to become stronger on Thursday, ushering in above-
average temperatures across the region, with melting levels
increasing to 7,000 - 7,500 feet, allowing for increased snowmelt
fore these areas. The next surge of precipitation is slated for
Friday, with precipitation beginning over the Sawtooths and
remainder of the Central Mountains, before overspreading all of SE
Idaho later in the day. Expect mainly rain below 6,500 to 7,000 feet
elevation with several inches of snow above this elevation range.
Into early next weekend, waves of precipitation are expected to
continue as moist westerly flow remains in place. Colder air may
begin to filter into the region by early next week with GFS
suggesting potential for snow at valley locations while ECMWF
maintains warmer temperatures. Have split the difference here, which
is more in line with ensemble members. This suggests some potential
for snow across the Snake Plain Saturday, but at this time amounts
are expected to be light. Still quite a bit of uncertainty in the
details at this forecast range, however. Main idea is active weather
is expected to continue, with above-average temperatures Wed-Fri,
with a cooldown expected into next weekend. AD/RS
&&
.AVIATION...Conditions have quickly improved at KSUN as snow has
exited the region as of 19Z Sat. VFR conditions expected at all TAF
sites into this evening. Convective-allowing models allow for the
development of isolated thunderstorms PIH-IDA and points east from
generally 04-09Z, so have added VCTS to IDA and PIH. Expect another
round of snow at KSUN to develop Sunday morning, with attendant
drops in CIGs and VIS. SN possibly heavy enough to force CIGs down
to or below airfield minimums. Lingering uncertainty on onset
timing, so current forecast reflects a blend of available models.
Band of precipitation expected to impact BYI by around 18Z, by late
afternoon at PIH and IDA and by around sunset at KDIJ. For PIH, IDA
and DIJ, RA or RASN mix expected at onset but expect a quick
turnover to SN. SN may be briefly heavy as this band swings through
with potential for IFR or LIFR CIGs/VIS. Even some potential for
TSSN. AD/RS
&&
.HYDROLOGY...Afternoon high hitting near 50F in a few spots today.
Ground has dried some in a number of areas, but local ponding of
water still exists. The cold front expected on Sunday will bring a
mix of rain and snow with up to a couple of tenths of liquid water
possible in the East Magic Valley and Lower Snake Plain. Timing of
the front has it clearing Idaho Falls and Pocatello around 5 to 6
pm. Cold air follows and will bring snow levels back down Sunday
evening and Monday. RS
.PIH WATCHES/WARNINGS/ADVISORIES...
Flood Watch through Monday morning for IDZ017-019>024.
Winter Weather Advisory from 5 AM Sunday to 5 AM MST Monday for
IDZ019-023-025.
Winter Storm Warning until 11 AM MST Sunday for IDZ018-031.
&&
Winter Storm, Upper Snake Highlands
- When
- March 4, 6:00 PM MST to March 6, 2:00 PM MST
- Where
- Upper Snake Highlands forecast zone
- Reported by
- Department of Highways
About 4 to 6 inches of snowfall combined with high winds caused Idaho Highway 32 to be closed from Ashton to Tetonia on the 6th and Idaho Highway 31 to be closed from Swan Valley to Victor.
Winter Storm, Caribou Highlands
- When
- March 4, 6:00 PM MST to March 6, 2:00 PM MST
- Where
- Caribou Highlands forecast zone
- Reported by
- Department of Highways
Snow amounts of 4 to 6 inches combined with high winds caused Idaho Highway 31 to be closed from Swan Valley to Victor on the 6th.
Winter Storm, Wasatch Mountains/Iadho Portion
- When
- March 5, 1:00 AM MST to March 6, 3:00 PM MST
- Where
- Wasatch Mountains/Iadho Portion forecast zone
- Reported by
- Newspaper
Strong winds and snow created difficult conditions. 4 to 8 inches of snow fell in the region with 6 inches in Bern. A snowmobiler was lost on the evening of the 5th due to the poor visibility and stayed overnight in a make shift shelter in a snow cave and was rescued on the 6th.
- Winter Storm
- A storm that brought snow, sleet or freezing rain at warning levels, usually over several hours or days.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Winter Storm and Hail in California, March 4 to 6, 20170.75 in hail · 17 events
- Debris Flows and Flooding in California, March 4 to 5, 20170.25 in hail · 10 events
- Heavy Snow in Idaho, March 4 to 5, 20175 events
- Winter Storm and High Wind in Wyoming, March 4 to 6, 201777 kt wind · 4 events
- Winter Weather in Ohio, March 4, 20174 events
- Heavy Snow and Winter Weather in Montana, March 4 to 5, 20174 events
- Heavy Snow in Oregon, March 4 to 6, 20174 events
- Winter Storm and Winter Weather in California, March 4 to 7, 20173 events
- Heavy Snow in Washington, March 4 to 5, 20173 events
- Heavy Snow in California, March 4 to 6, 20173 events
- Heavy Rain in Hawaii, March 4 to 5, 20172 events
- Heavy Snow in Nevada, March 4 to 6, 20172 events
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: 689078, 689079, 689080.