Weather and Avalanche Log

Precip and wind are taken between 4-6 a.m. and are for the previous 24 hours. Precipitation is recorded in SWE from SNOTEL and Ski Areas
SNOTEL Locations: Brackett - Bridgers; Shower - Hyalite; Lone - Big Sky; Carrot - S. Madison; Madison - W. Yellowstone; Fisher - Cooke
Ski Area SWE: Alpine - Bridger; Timber - YC

Date Northern Areas Southern Areas Wind Speed Wind Direction Avalanche Activity Notes
Wednesday 5/2/18 0-10 NW-NE
Tuesday 5/1/18 5-10 NE-NW

Hard rain in the valley, snow in the high mountains

Monday 4/30/18 5-10 SW-SE

Good freeze last night. Temps low 30s to high 20s F

Sunday 4/29/18 10-15 G25-50 SE-SW

Light rain overnight, then possible freeze this morning. Fisher SNOTEL shows >1" SWE and 0" precip? webcam showed rain.

Saturday 4/28/18 5-15
G25-30
S-SE

high/mid-30s F and clear skies overnight, some freeze

Friday 4/27/18 5-15 SW-SE

Slight freeze last night, clear skies and low-mid 30s F

Thursday 4/26/18 5-20 NW-N

Good freeze overnight

Wednesday 4/25/18 15-25 SW
Tuesday 4/24/18 5-15 E-NE
Monday 4/23/18 5-15 G25 NE
Sunday 4/22/18 15-25 W-SW
Saturday 4/21/18 10-25 W-SW

Good freeze overnight except in the Bridgers. 

Friday 4/20/18 5-15 N-NE
Thursday 4/19/18 5-15 S-SE

Warm but cloudy today. Freeze overnight. Wet loose potential this afternoon. 

Wednesday 4/18/18 5-15 W-SW

Good freeze overnight. Warm and sunny today. 

Tuesday 4/17/18 15-25 W-SW

12" of new snow Bridger. Big avalanche potential once it warms up. 

Monday 4/16/18 15-30
G 50+ Hyalite, Big Sky
SW
Sunday 4/15/18 10-25 SW

No freeze at Brackett Ck (34F @ 7200').

Saturday 4/14/18 15-30 W-SW 1 skier triggered, caught, partially buried, killed

Avalanche Fatality Saddle Peak

Friday 4/13/18 15-25 G30-45 NW

AVALANCHE WARNING in Bridger Range

Thursday 4/12/18 15-25 G30-40 S-SW
Wednesday 4/11/18 20-25 G40-60 SW-W
Tuesday 4/10/18 15-25 W-SW
Monday 4/9/18 15-25 W-NW
Sunday 4/8/18 15-25 G30-40 NW-SW

.1-.2" of rain at start of storm to ~9,000'

Lightening hit Bridger Bowl, knocked out some wx stations.

Saturday 4/7/18 5-15 G25 W-SW
NW cooke
Friday 4/6/18 10-25
20-30 Bridgers
W-SW
E in Bridgers

East wind is cold: 2F at Bridger @5am; 30F at Lionhead.

Thursday 4/5/18 20-40 N
15-25 S
W-SW
Wednesday 4/4/18 15-35 W-SW
Tuesday 4/3/18 10-25 G35 W-NW
Monday 4/2/18 15-20 G35 W-SW

Snow totals at 0500 forecast heavy snow to continue

Sunday 4/1/18 5-15 G25 W-NW
Saturday 3/31/18 15-30 W-NW

Calmer today

Friday 3/30/18 15-30 W-SW
Thursday 3/29/18 10-25 W-NW

Fisher Creek under reported. Ben Z said there was close to a foot of fresh around the Yurt. 

Wednesday 3/28/18 15-25 G40 W-NW
Tuesday 3/27/18 35-45 Bridger
20-35 elsewhere
W

Very windy in Bridgers (40-50 mph, G70 mph) at all elevations and directions.

Monday 3/26/18 5-15 NE-NW
Sunday 3/25/18 10-25 G30-50 S-SW

wind calm this morning

Saturday 3/24/18 15-30 G40-60 SW-S
Friday 3/23/18 5-20 W-SW

Heavy rain below 8,000 ft. 

Thursday 3/22/18 10-30 W-SW
Wednesday 3/21/18 15-25 W-SW
Tuesday 3/20/18 15-20 G30 W

people reported 3+" new up Hyalite

Monday 3/19/18 5-15 W-NW
Sunday 3/18/18 15-25 G30-45 E-SE yesterday
SW-S this am
Saturday 3/17/18 10-20 S-SE
Friday 3/16/18 5-20 SW
Thursday 3/15/18 10-20
G 30 Cooke
SW

Dropping temps, no wet avalanche danger 

Wednesday 3/14/18 10-20 G35
30-45 Hyalite
S-SW
Tuesday 3/13/18 5-10 G20 SW-SE

Temperatures reached upper 40s F in afternoon.

Monday 3/12/18 5-15 S-W

Temperatures reached 40F.

Sunday 3/11/18 5-15 S-SW
Saturday 3/10/18 20-30 G40-60 SW

Strong wind yesterday. light to moderate this morning.

Friday 3/9/18 15-30 W-SW
Thursday 3/8/18 10-25 W-SW
Wednesday 3/7/18 10-15 G28 W-SW
Tuesday 3/6/18 15-20 G30 W
Monday 3/5/18 15-25 G40 W-NW
Sunday 3/4/18 5-15 E-NE
Saturday 3/3/18 10-25 S-SE
Friday 3/2/18 15-30
G 50 Hyalite
S-SE
Thursday 3/1/18 15-40 W-SW
Wednesday 2/28/18 10-15 G30
W-SW

LuLu Pass Wx not reporting.

Tuesday 2/27/18 20-25
G35
SW-W

4% density snow measured at Bridger Bowl and Big Sky.

LuLu Pass Wx not reporting.

Monday 2/26/18 20-30 G50 SW

LuLu Pass Wx not reporting.

Sunday 2/25/18 25-30 G40-50 W-SW
Saturday 2/24/18 15-25 G30-40 WSW
Friday 2/23/18 5-20 S, SW, SE
Thursday 2/22/18 10-25 W-SW
Wednesday 2/21/18 10-20 G 35 W-SW
SE in Cooke
Tuesday 2/20/18 15-25 W-NW (north)
N (south)
SE (Cooke)
Monday 2/19/18 5-15
25-30 Bridger
E-NE
S BigSky/Hyalite

SNOTEL down @ 2000 yesterday

Sunday 2/18/18 20-40 G60+ SW-W
Saturday 2/17/18 15-30
G 40+
W

Storm moving in this afternoon/evening. 

Friday 2/16/18 15-35 WSW
Thursday 2/15/18 15-30
W-NW
Wednesday 2/14/18 25-40 SW
Tuesday 2/13/18 30-35 @Bridger
15-25
W-SW
Monday 2/12/18 5-15
25-35 Bridger
ESE
Sunday 2/11/18 15-25 G45 W-SW
Saturday 2/10/18 5-15 N-NW
Friday 2/9/18 15-30
G 60 Timber
W

AVALANCHE WARNING Cooke City 

Thursday 2/8/18 20-30
G 40+
W-SW

AVALANCHE WARNING issued for Cooke City. Heavy snow in the Bridgers and Cooke. 

Wednesday 2/7/18 25-30 in north
15 in South
G56
W
Tuesday 2/6/18 10-20 G 35 W
Monday 2/5/18 20-30 G40-60 W

AVALANCHE WARNING Cooke City

Sunday 2/4/18 25-40 G60+ W-NW

HIGH danger wind loaded slopes Cooke City

Saturday 2/3/18 15-35
G 50+ Hyalite
W-NW

HIGH danger wind loaded slopes Cooke City 

Friday 2/2/18 15-30 W-SW

Snow developing today. 

Thursday 2/1/18 15-25
G 40 YC
W-NW
Wednesday 1/31/18 20-25 G 45 W

Gusted from W-SW at 50-70 Tue afternoon when snow started.

Tuesday 1/30/18 25-40 G 68
SW
Monday 1/29/18 20-30 G40 W-SW
Sunday 1/28/18 25-30 G50 WSW
Saturday 1/27/18 15-20
G30-40
WSW
Friday 1/26/18 15-35 W-NW
Thursday 1/25/18 15-25
G50-60 Hyalite, Cooke
S-SW
Wednesday 1/24/18 25-35 G50 Hyalite SW
Tuesday 1/23/18 15-30 G40 Hyalite W
Monday 1/22/18 20-30 SW
Sunday 1/21/18 10-20
G32 Lionhead
NW-N
Saturday 1/20/18 10-20 W-NW

AVALANCHE WARNING Lionhead

Avalanche Fatality

Friday 1/19/18 20-40 W-SW
Thursday 1/18/18 20-40 W-SW
Wednesday 1/17/18 25-35 Bridgers
10-15
NW-SW
Tuesday 1/16/18 5-15 G20 W-SW
Monday 1/15/18 10-15 G25
25-30 Cooke
NW-N
Sunday 1/14/18 10-20 G30
30-35
Bridger
W-NW
Saturday 1/13/18 10-25 G35 W
Friday 1/12/18 20-40 W-SW
Thursday 1/11/18 15-30 W-SW
Wednesday 1/10/18 20-30 G40 SW-W

AVALANCHE WARNING Lionhead

Avalanche Fatality

Tuesday 1/9/18 10-20 G45 SW
Monday 1/8/18 10-20 WSW
Sunday 1/7/18 10-25 G35 W-SW
Saturday 1/6/18 10-20 W
Friday 1/5/18 5-20 W
Thursday 1/4/18 5-15 W-SW
Wednesday 1/3/18 10-25 SW-W-NW
Tuesday 1/2/18 10-20 in the south; 20-30 in north W

Avalanche Fatality; Bridger had strong downhill winds.

Monday 1/1/18 10-20 G25 W-SW
Sunday 12/31/17 20-30 G50 W-NW
Saturday 12/30/17 20-25 G40 SW

AVALANCHE WARNING Cooke, Lionhead, S. Madison, S. Gallatin

Friday 12/29/17 20-40 West

High danger on wind load, Cooke City. 

Thursday 12/28/17 20-40 West

High danger on wind load, Cooke City.

Wednesday 12/27/17 20-35 SW
Tuesday 12/26/17 20-30
G50 Timber
W-NW

5% density in north, closer to 10% in south.

Monday 12/25/17 5-15 G25 W-SW
NW Cooke
Sunday 12/24/17 20-30 NW-W
Saturday 12/23/17 10-20 W-NW
Friday 12/22/17 10-20 W-NW
Thursday 12/21/17 10-20 W-NW
Wednesday 12/20/17 20-35 G60 SW

@ 0600.

Tuesday 12/19/17 in north
25-40
in south
10-25
W-SW
Monday 12/18/17 north 25-40
south 15-25
W-SW
Sunday 12/17/17 North
25-40
South
10-20
W-NW
Saturday 12/16/17 5-15 W
Friday 12/15/17 15-25 G40 WNW
SW TFork
/Lionhead
Thursday 12/14/17 10-20 W-NW
Wednesday 12/13/17 20-30
G45 Cooke
W-NW
Tuesday 12/12/17 10-15 G25 W

Inversion: At 5 a.m. above freezing temps (35-38F) at ridgetops (excluding West Yell and Cooke).

Monday 12/11/17 15-25 north
5-15 south
W-NW
Sunday 12/10/17 15-25
G35
NW-W

Highs around 40 F yesterday

Saturday 12/9/17 10-30 W-NW
Friday 12/8/17 15-30
W, NW, SW

Wind gusts reached close to 50 mph around Cooke.

Thursday 12/7/17 10-25 W-NW
Wednesday 12/6/17 15-25 W-NW

Winds were steady 35 mph from all directions in the Bridgers yesterday; lots of unusual loading.

Tuesday 12/5/17 40-50 Bridgers
15-25
W-SW

Temps in low single digits at 5am;
Storm Totals: 14-18" Bridger and Hyalite; 10" Big Sky; 6" West Yell; 12" Cooke

Monday 12/4/17 10-15 G25
25-30 G50 Cooke
NW-W
Sunday 12/3/17 15-25
G45
SW
Saturday 12/2/17 10-20 G30 SW-W
Friday 12/1/17 10-25 West
Thursday 11/30/17 10-20 West
Wednesday 11/29/17 25-40 G 70 Cooke W-S
Tuesday 11/28/17 15-30 G45 W

Storm totals of 3" Bridger's, 6"-8" elsewhere. Overnight lows of 10F.

Monday 11/27/17 25-30
G60
SW
S Cooke

Precip. @ 0500

Sunday 11/26/17 10-20 G40 W-SW

Freezing level above 9,000' at 0400

Saturday 11/25/17 15-25 W-SW
Friday 11/24/17 20-50 West

Bridger Bowl won't be opening due to loss of snow. 

Thursday 11/23/17 20-30 G47 W-SW

Freezing level at 0600 near 10,000'.

Wednesday 11/22/17 15-30 G44 W-SW

Temps above freezing @ 8,500'

Tuesday 11/21/17 20-30 G55 W
Monday 11/20/17 35-45 G 56
SW

Temps: mid 20's in N; high teens in S

Sunday 11/19/17 20-30 G40 W
Saturday 11/18/17 15-30 G45 SW
SW-NW Cooke
Friday 11/17/17 15-30 mph W-SW

Temps were warm during the storm, hovering right around freezing. Lots of water down south with high density snow.  

Thursday 11/16/17 15-30 G50 S-SW

weather @ 0700

Wednesday 11/15/17 15-25 G35
G44 Lulu
W-SW
Tuesday 11/14/17 15-30 West

Wind gusts around Cooke City were in the 40s. 

Monday 11/13/17 20-40 G45 W-SW

Very strong winds from the W-SW, transporting lots of snow. 

Sunday 11/12/17 15-30 W-SW

Most snow fell yesterday morning.

Saturday 11/11/17 10-20 G30 W-SW
Friday 11/10/17 10-20 G35-45 W-SW
Thursday 11/9/17 15-25 SW
Wednesday 11/8/17 15-25 G35 W-SW

lows around 20F

Tuesday 11/7/17 10-20 W

single digits F overnight

Monday 11/6/17 10-15

15-20 G30 YC
W-SW
Sunday 11/5/17 10-15 SW

Not all wx sites reporting on website

Saturday 11/4/17 10-20 G30 W-SW
Friday 11/3/17 10-20 G35 SW
Thursday 11/2/17 5-15 W-SW
Wednesday 11/1/17 15-20 G30
G63 Timber
W

Recorded about 0800.

Thursday 10/26/17 5-10 G15
NW-NE
Monday 10/23/17 15-25 G30-60
G77 Hyalite
W
Sunday 10/22/17 15-15 G30 W-SW
Saturday 10/21/17 15-20
G30 Bridger
G40 Timber
W
Saturday 10/14/17 10-20 W-N
Thursday 10/12/17 15-25 W

wind-loading

Sunday 10/8/17 20-25 G50 SSW
Saturday 10/7/17 20-35 G62 SSW
Friday 10/6/17 8-12 G22 WSW
Thursday 10/5/17 5-15 G 30 W-SW
Tuesday 10/3/17 15-20 Bridger
5-10 Timber
W
Monday 10/2/17 10-20 NW

Temps at 5am are in the mid-20s.

Sunday 10/1/17 20 G30 Bridger W

snow line around 9k in Bridgers

Sunday 9/24/17 Calm NNE
Saturday 9/23/17 Calm SSW
Friday 9/22/17 5-15 N-NE

First day of Fall

Thursday 9/21/17 Yes SW

24 hr precip @ 8am

Wednesday 9/20/17 15-20 G35 S

24 hr precip @ 9am

Tuesday 9/19/17

24 hr precip as of 9am

Saturday 9/16/17 5 G15 @ Alpine
NA

First snow in mountains. 4-11" Bridger and Big Sky. 48 hour precip. totals