Idaho, 2017

Heavy Snow in Idaho, February 7 to 10, 2017

February 7 to 10, 2017 · NWS PIH · 5 events in 5 counties and zones

A strong Pacific story system brought heavy snow to high elevations in southeast Idaho. Amounts of 10 to 23 inches occurred.

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
5

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 Pacific story system brought heavy snow to high elevations in southeast Idaho. Amounts of 10 to 23 inches 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 Feb 7, 3:33 AM MST, 9 hours 27 minutes earlier.

Area forecast discussion, Feb 7, 3:33 AM MST, 9 hours 27 minutes before
Area Forecast Discussion
National Weather Service Pocatello ID
333 AM MST Tue Feb 7 2017

.SHORT TERM...Today and Wednesday. A steady stream of moisture
continues this morning with rain and snow generally south of a
Jerome to Driggs line. This is where most of the precipitation is
occurring, with even some slushy snow down to lowest valleys
floors on occasion. This band starts to lift north later this
morning, and by afternoon is already through eastern Idaho. Some
lingering precipitation mainly closer to the Wyoming border and
also in the Sawtooths. A few showers will also remain possible
elsewhere. Snow levels rise as the warm front and precipitation
band shoots north, and by afternoon in most areas will range in
the 5500-6500ft. They will be a little lower near Island Park and
Monida, but actually closer to 7000ft across the southern
highlands and also for the Sawtooths and Boulders. We almost
forgot to mention, winds ramp up quickly AGAIN today. For winter
headlines, we are extending (AGAIN) the warning for the southeast
corner due to snow and increasing winds through this evening.
Another 5-11" is possible above 6500ft, with a quick drop in
amounts below that. We are going to issue a Winter Weather
Advisory for the higher elevations of the south-central highlands
AND the Magic Valley. For the highlands, this is above 5500ft and
north toward the Lava Beds in the Magic Valley. Those areas will
see a quick additional 3-4 inches before things warm up. For the
Wood River Valley and Sawtooths, another 3-5" is possible IF the
heavier snow reaches that far north. If not, expect about half
that. For the rest of the area, we'll see anywhere from rain/snow
mix with little/no accumulation up to 3", depending on location
and elevation. Precipitation wise, overnight and Wednesday will
mainly have light precipitation across the Sawtooths and eastern
highlands, with a few showers possible elsewhere. Back to the
wind, we are looking at another windy period especially late this
afternoon through the overnight hours. We usually don't see very
strong winds at night but this looks to be the exception. The
pressure gradient tightens along with increasing mid level winds.
We should see enough mixing to keep the winds going well into the
night. The strongest winds will be across the Snake Plain and
mid/upper slopes especially across the southern and eastern
highlands. Sustained winds across the Plain reach 30-35mph with
gusts into the 50s. For those highland areas, 25-35mph sustained
with gusts in the 40s and 50s is forecast. The higher up you go,
the higher the wind. For now, we will issue a Wind Advisory for
the Snake Plain, with the idea that we may need to expand that.
The winds will die down on Wednesday. Keyes

.LONG TERM...Wednesday night through Tuesday night. Not much
difference in the model solutions. A broad upper ridge over the west
will do little to curb precip Wed night thru Thu night as Pac
moisture continues to stream in. The ridge will keep temps up...and
push snow levels up fairly high. Around a foot of snow looks
possible in the upslope prone areas of the central mtns...and
several inches in the eastern highlands by Fri morning. Most above
7000 ft. The rest of the area should see mainly rain. The light at
the end of the tunnel finally arrives by Sunday...as upper ridging
builds into the west coast. The upper ridge is expected to dominate
with dry conditions and mild temps thru Tue night. Hedges

&&

.AVIATION...Another wave moving thru the moist westerly flow today
will result in widespread precip and low cigs thru this aftn.
Conditions are expected to improve later this aftn. Snow this morn
will change over to rain in the valleys...but will stay snow at KSUN
and KDIJ. Winds will become stronger this aftn...and increase during
the eve hours in the wake of the upper trof. Hedges

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Flood Watch through this evening for IDZ017-021>024.

Wind Advisory from 2 PM this afternoon to 5 AM MST Wednesday for
IDZ020-021.

Winter Storm Warning until 11 PM MST this evening for IDZ023-025.

Winter Weather Advisory until 11 AM MST this morning for IDZ017-
022.

&&

In the hours before

Local storm report, Feb 7, 9:32 AM MST, 3 hours 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
932 AM MST TUE FEB 07 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0929 AM     FLOOD            1 SW ACEQUIA            42.66N 113.61W
02/07/2017                   MINIDOKA           ID   LAW ENFORCEMENT

            LAW ENFORCEMENT REPORTED 8 TO 9 INCHES OF WATER COVERING
            STATE ROUTE 24 BETWEEN ACEQUIA AND RUPERT. THE FLOODING
            IS FROM RAIN AND SNOW MELT.

&&

RSURVICK
Local storm report, Feb 7, 11:18 AM MST, 1 hour 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
1118 AM MST TUE FEB 07 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1116 AM     SNOW             3 SSW REXBURG           43.78N 111.80W
02/07/2017  M3.0 INCH        MADISON            ID   TRAINED SPOTTER

            SNOW FELL AT A RATE OF ONE INCH IN ONE HOUR AND WAS
            CONTINUING HEAVY AT THE TIME OF OBSERVATION.

&&

JMESSICK
Local storm report, Feb 7, 11:28 AM MST, 1 hour 32 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE POCATELLO ID
1128 AM MST TUE FEB 07 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1116 AM     SNOW             3 SSW REXBURG           43.78N 111.80W
02/07/2017  M4.0 INCH        MADISON            ID   TRAINED SPOTTER

            SNOW FELL AT A RATE IN EXCESS ONE INCH IN ONE HOUR AND
            WAS CONTINUING HEAVY AT THE TIME OF OBSERVATION.

&&

JMESSICK
Local storm report, Feb 7, 12:22 PM MST, 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
1222 PM MST TUE FEB 07 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1220 PM     SNOW             NNE RIGBY               43.68N 111.91W
02/07/2017  M2.0 INCH        JEFFERSON          ID   CO-OP OBSERVER

            SNOW STARTED AT 0830 MST, STORM TOTAL SO FAR.

&&

JMESSICK
Local storm report, Feb 7, 12:29 PM MST, 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
1229 PM MST TUE FEB 07 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1200 PM     SNOW             CHUBBUCK                42.92N 112.46W
02/07/2017  M2.5 INCH        BANNOCK            ID   NWS EMPLOYEE

            12-HOUR TOTAL

&&

MH
Local storm report, Feb 7, 12:32 PM MST, 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
1232 PM MST TUE FEB 07 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1149 AM     SNOW             SHOSHONE                42.94N 114.40W
02/07/2017  E3.0 INCH        LINCOLN            ID   COUNTY OFFICIAL

            12-HOUR TOTAL

&&

MH

Event by event

5 heavy snow. Local standard time, as filed.

Heavy Snow, Big and Little Wood River Region

When
February 7, 1:00 PM MST to February 10, 11:00 PM MST
Where
Big and Little Wood River Region forecast zone
Reported by
SNOTEL

SNOTEL snow amounts were: 8 inches Chocolate Gulch, 19 inches Galena, 16 inches Dollarhide Summit, 15 inches Galena Summit, 10 inches Hyndman, 22 inches Lost Wood Divide, 8 inches Swede Peak, and 26 inches Vienna Mine.

Heavy Snow, Sawtooth Mountains

When
February 7, 2:00 PM MST to February 10, 11:00 PM MST
Where
Sawtooth Mountains forecast zone
Reported by
SNOTEL

Heaviest SNOTEL amounts were 18 inches at Bear Canyon and 15 inches at Mill Creek Summit. 11 inches fell at the Stanley COOP site.

Heavy Snow, Wasatch Mountains/Iadho Portion

When
February 7, 2:00 PM MST to February 10, 11:00 PM MST
Where
Wasatch Mountains/Iadho Portion forecast zone
Reported by
SNOTEL

Ten inches of snow fell at the Emigrant Summit SNOTEL sites.

Heavy Snow, South Central Highlands

When
February 7, 3:00 PM MST to February 10, 11:00 PM MST
Where
South Central Highlands forecast zone
Reported by
SNOTEL

The Howell Canyon SNOTEL received 16 inches of snow.

Heavy Snow, Upper Snake Highlands

When
February 7, 4:00 PM MST to February 10, 11:00 PM MST
Where
Upper Snake Highlands forecast zone
Reported by
SNOTEL

At the White Elephant SNOTEL site 12 inches of snow fell. 6 inches fell Island Park.

What these are

Heavy Snow
Snowfall reaching the local warning threshold without the other hazards of a winter storm.

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

The same day elsewhere

More

Every storm in Idaho in 2017Every state in 2017This day in weather historyWarnings in Idaho, February 2017

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: 681088, 680820, 681086, 680841, 680836.