The Morning Intel | Tahoe Sector Watch

Location: #HippieHaus | South Lake Tahoe, CA

Date: Wednesday, December 10, 2025

¡Buenos días, my friends! Cup'O'Joe in hand, and the #StokeLevelSteady at 11.6 on this #WisdomWednesday. It's another Dual-sport day ahead as the sun rises. The snow machines are silent across the Sierra as we continue to experience inversions around the Basin. Reports from Heavenly, MammothMtn, Mt. Rose, and KirkwoodMtn all echo the same sentiment: "Firm to start, semi-softening throughout the day - Carvalicious-cord." The Mtn Teams are working hard to keep what's open riding well. Be aware: early season conditions do exist, and even on-piste, we are beginning to see a few sharky zones exposed. Head on a swivel and respect the thin cover.

Weather ahead: Warm, sunny, light winds. We are in a rinse-and-repeat cycle of dry, mild weather into the weekend. Some prognosticators are hinting, chatting, and trying hard to connect a breakdown of the HP ridge to an incoming round of weather past the 10-day mark. From what I see and who I reference, it feels more like the 18th/19th range for a shift, with a possibility (not probability) of a snowy, white Christmas here at the #HippieHaus.

So, for now, my friends, patience and gratitude for what we have before us here in the Sierra. If you are in need of POW, look to our friends at Alta, Revy, Jackson, and way down south at AZ Snowbowl. Go get'cha some... 24hr NAM 3km Snow forecast models are available on the page here, to assist in'yr POWHunt'n decision-making process.

Off to HV for a few morning laps, then out to KirkwoodMtn for a few mid-morning laps. Two mountains, limited terrain—one day in the life.

Today's Intel

  • 🚠 Bullwheels Turning: KirkwoodMtn, Heavenly, Mt Rose, MammothMtn, Palisades, Boreal, Northstar, Revelstoke.

  • 🌡️ Temps: Unseasonably Warm. Highs 15-20º degrees above average (mid-50s to mid-60s). South Lake Tahoe could challenge the record high of 63° today.

  • 🚗 Roads: ALL CLEAR in the Sierra. Dense Fog Advisory in the Sacramento/Solano Valleys (Hwy 50 / I-80).

The RS Mindset: While we wait for the pattern flip, we embrace the dual-sport life. Ski in the AM, bike or paddle in the PM. The storm door is locked here, but open elsewhere. If you stay, enjoy the "Tahoe Zonker Tan-Athon." #JustDoIt

Looking forward to the next 3–7 days:

  • Potential Rain and Snow Outlook: Dry Pattern Continues. High pressure remains anchored through the weekend.

  • Forecast Update / Changes:

  • The Shift: Models continue to hint at a pattern change next week, but the trend is shifting wetter compared to yesterday.

  • The Data: Latest ensembles show a 20-40% chance of light precip (0.25" liquid) arriving next Tuesday (Dec 16).

  • The Catch: Snow levels look HIGH (8,000-9,000 ft), so this first pulse may not bring much help to the snowpack below the highest peaks.

  • Snow Levels: N/A

  • Temperatures: Near Record Warmth. Highs will be 10-15º degrees above average through the weekend.

  • Winds / Wind Conditions: Light. Winds remain light and terrain-driven.

  • Road Conditions: ALL CLEAR. Watch for brake checks on I-80 West.

The Weather Ahead | Temperatures | Winds | Winter

Forecasted Temperatures (Today's High / Tonight's Low):

  • #HippieHaus (SLT / 6,380'): 60° / 37°

  • Kirkwood (Base / 7,800'): 55° / 32°

  • Truckee (North Shore / 5,800'): 58° / 25°

  • Mammoth Mtn (Base / 8,900'): 48° / 30°

Timing of wind direction/wind speeds: Light/Variable winds today. No significant wind events expected.

Seven(7) Day forecast (Lake Level Highs/Lows):

  • Today (Wed): 60° / 37° (Sunny, Near Record Warmth)

  • Thursday: 59° / 35° (Sunny, Warm)

  • Friday: 56° / 32° (Sunny)

  • Saturday: 54° / 30° (Sunny)

  • Sunday: 52° / 28° (Partly Cloudy)

  • Monday: 50° / 26° (Cooling Trend)

  • Tuesday: 48° / 28° (Chance of Rain/Snow High Elevation)

Sierra Avalanche Center (Tahoe / Carson Pass):

  • Status: #LowTide.

  • Hazard: #SnowSharks.

  • Discussion: Shallow snowpack. Avalanche concerns exist in isolated areas where hard, supportable slabs of wind-drifted snow exist on top of weak sugary snow.

  • Link: https://bit.ly/SierraAvyForecast

Eastern Sierra Avalanche Center (Mammoth Zone):

⚓ Marine Forecast for Lake Tahoe:

  • Status: NO HAZARDOUS WEATHER.

  • TODAY: Sunny. Light winds. Highs 55-60. Wave Heights < 1 foot.

  • TONIGHT: Clear. Light winds. Lows 37-44. Wave Heights < 1 foot.

  • THURSDAY: Sunny. Light winds. Highs around 60.

  • Water Temp: 49.0°F.

  • Mariner Note: Glassy conditions. Highly recommend a 4/3 or 5/4 wetty if you are paddling/foiling due to cold water shock risk.

✈️ Aviation Forecast:

  • Conditions: VFR prevails across all terminals.

  • Hazards:

  • Haze: Valley inversions could produce minor reductions in slantwise visibility each morning.

  • FZFG (Freezing Fog): 50-70% chance for patchy Freezing Fog at KTRK (Truckee) between 10Z-16Z.

  • Winds: Light winds. No significant turbulence or LLWS expected.

For #HippieHaus & Mammoth (NWS Reno):

  • Records: Yesterday missed record highs by 3 degrees. Today brings another shot, but inversions may limit heating potential.

  • Long Range Update: "The blocking pattern... looks to finally dislodge towards the middle of the month." Ensembles are trending wetter for next Tuesday, but snow levels remain high (8-9k ft).

  • Wind: Light winds continue this week.

For Carson Pass / KirkwoodMtn Zone (NWS Sacramento):

  • Valley Focus: Dense Fog Advisory (Solano/Yolo/Sacramento).

  • Mountain Focus: "Increasingly mild temperatures with sunny skies and dry weather are expected over higher terrain."

On this #WisdomWednesday, we find balance. The skiing is firm but fun, the weather is warm, and the travel is easy. Enjoy the dual-sport days, keep your edges sharp, and stay tuned for the mid-month pattern shift. Patience is the practice.

Stay'nThirsty for POW

Coop | RS#69

ECMWF AIFS ENS [M] 0.25º 6-hr Precip (in.), MSLP (hPa), 850mb Temp.(ºC)

Weather map showing high and low pressure systems, precipitation, and temperature patterns across the United States and parts of Canada and Mexico for December 10, 2025.

ECMWF AIFS ENS [M] 0.25º 500mb Height (dam) and Anomaly - 5 day

A weather map showing 500 millibar height, anomaly, and jet streams over North America. It displays regions of high and low-pressure systems, with colors indicating anomalies from normal conditions, including a significant low-pressure area over the Arctic and a high-pressure area over the southwestern United States.

ECMWF AIFS ENS [M] 0.25º QPF 5-day Anomaly (Inches)

Map of the United States showing weather anomalies with areas of precipitation and drought. Green indicates wetter-than-normal conditions, brown indicates drier-than-normal, and blue highlights areas with above-average rainfall.

ECMWF AIFS ENS [M] 0.25º 24hr Snow (10:1 Ratio) (Inches)

7-day snow accumulation forecast map for North America showing varying snow levels, with higher accumulations in the northeastern US, parts of Canada, and the mountainous western regions, using shades of blue, pink, and gray.

ECMWF AIFS ENS [M] 0.25º 500mb Geopotential Height (dam)

A weather map showing 500mb geopotential height contours over North America, with a low-pressure system centered over the Great Lakes and a high-pressure system over the southeastern United States, indicating varying atmospheric conditions.

ECMWF AIFS ENS [M] 0.25º Ensemble Member-Wise Minimun MSLP (hPa)

A weather map showing ensemble member-wise minimum sea level pressure in hPa across North America and surrounding regions, with high and low-pressure systems marked and color-coded to indicate pressure levels, valid for 06:00 UTC on December 10, 2025.

Chair Six(6) Ridge Actual - KirkwoodMtn - 9,100’

Graph showing wind direction in green, wind speed in blue, and gusts in red over 24 hours, with a switch labeled 'Heat Off/On'. Below is a table with timestamped weather data including air temperature, wet bulb, relative humidity, wind direction, speed, gust, and voltage readings.

NAM 12Km 6hr Precip, MSLP, 850mb Temp (Cº)

Weather map displaying frosty conditions over parts of Central America, with clouds and precipitation near the northwestern coast, high-pressure system over the Caribbean, and various isobars indicating atmospheric pressure.

NAM 12km | Composite Precip Type & Cloud Cover

Weather map showing composite reflectivity, precipitation type, and total cloud cover over California and surrounding areas, with areas of green indicating light rain. The map includes various weather stations and labels.
Map showing 24-hour precipitation levels across California and neighboring states, with light rainfall indicated in green and minimal precipitation in gray, valid for December 11, 2025.

NAM 3km | 24hr Precipitation (in)

Map of the western United States showing 24-hour snow accumulation in inches, with some regions like northern California, Oregon, Washington, and Idaho experiencing snowfall. The map includes a color scale at the bottom indicating snowfall amounts from 0.1 to 48 inches.

NBM 2.5km West-Conus | 24hr Snow (in)

NAM 3km Composite Reflectivity 1000m AGL

Weather radar map of California showing composite reflectivity. Light to moderate rain appears along the California coast, particularly around the San Francisco Bay area, with scattered showers elsewhere. The rest of the state shows no significant rain.

WPC 2.5km 24hr Snow 90 Percentile (Inches)

Map showing 24-hour snowfall accumulation in inches across the Northwestern United States on December 10, 2025, with some areas receiving over 12 inches of snow, especially in mountainous regions.
Weather map showing maximum surface temperatures in California, Nevada, Arizona, and surrounding states on December 10, 2025. Temperatures range from the mid-30s to the high 80s Fahrenheit, with the hottest areas in southern California and Arizona.

NAM 3km | 2m Temperatures - MAX (ºf)

Map showing temperature distribution across California and surrounding areas on December 11, 2025, with temperatures ranging from 24.1°F to 71.2°F. Cold areas are shaded in blue, warmer areas in yellow and orange. The map includes a timeline, calibration details, and weather data for specific locations.

NAM 3km | 80m Wind Speeds + Streamlines (kts)

Weather map showing wind speeds and streamlines over California and surrounding areas on December 10, 2025. Wind speeds are color-coded, with stronger winds in green and over 50 knots, especially offshore and along the coast, and lighter winds in blue and white inland. Streamlines indicate wind flow directions.

NAM 3km | 0-6km Wind Shear (kts) + Streamlines

Weather map showing wind shear in knots across California, Oregon, Nevada, and surrounding states, with areas in red indicating high wind shear and blue/green indicating lower wind shear. Map includes forecast data for December 10, 2025.

NAM 3km | 2m Temperatures - MIN ºf)

NAM 3km | 925mb Wind (kts) + Streamlines

Weather map showing wind speeds in knots and streamlines, indicating a weather system off the west coast of the United States with areas of high wind activity and varying atmospheric pressure. Color codes range from blue for lower wind speeds to orange and red for higher speeds.

POWHUNT’n 24hr Snowfall Guidance West

Weather radar map showing areas of snowfall in the northern United States, including parts of Montana and the Dakotas, with concentrations indicated by shades of blue, pink, and purple on December 10-11, 2025.

NAM 3km | 24hr Snow (10:1 Ratio) Utah

NAM 3km | 24hr Snow (10:1 Ratio) Colorado

Weather map showing snowfall forecast in inches across parts of the Northwestern United States, with darker and colored areas indicating higher snowfall amounts, valid for early December 11, 2025.

NAM 3km | 24hr Snow (10:1 Ratio) Washington

Map showing snow accumulation in inches across Montana, North Dakota, and parts of neighboring states, with most areas showing little to no snow, and some regions in the north and northwest experiencing significant snowfall.

NAM 3km | 24hr Snow (10:1 Ratio) British Columbia

Satellite weather map showing 24-hour snowfall accumulation in centimeters across Alaska and nearby regions, with the highest snowfall around 110.7 cm in southeastern Alaska. Different shades indicate varying snow depths, with pink and purple areas representing the most significant snowfall.

NAM 3km | 24hr Snow (10:1 Ratio) Alaska

Map showing snow accumulation in centimeters over Alaska and parts of Canada, with colors indicating different snow depths, on December 11, 2025.
Map showing snow accumulation in inches across the northwestern United States, with mountain ranges highlighted by higher snow levels in purple and pink shades, over a period ending December 10, 2025.

NAM 3km | 24hr Snow (10:1 Ratio) Idaho

NAM 3km | 24hr Snow (10:1 Ratio) Montana

Map showing 24-hour snow accumulation in inches across parts of the northwestern United States, with the heaviest snowfall in central Idaho and near the Cascade Mountains, and lighter snowfall in surrounding regions, valid for December 11, 2025.

NAM 3km | 24hr Snow (10:1 Ratio) Wyoming

Map showing 24-hour snowfall in inches over parts of the northwestern United States and southern Canada, with color-coded regions indicating varying snowfall amounts, mostly between 0.1 and 5.8 inches, with some areas exceeding 8 inches.

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