High pressure parks over the West Coast

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High pressure parks over the West Coast 〰️

The Morning Intel | Tahoe Sector Watch

Location: #HippieHaus | South Lake Tahoe, CA
Date: Friday, January 9, 2026
Time: 06:15 PST

¡Buenos días my friends,
Cup’O’Joe in hand, #StokeLevelSolid at 12, on a #FreakFlagFly’n Friday, upper Mtn East winds are honk’n, 135mph (Saffir-Simpson Hurricane scale - Cat3/4) last night atop KirkwoodMtn, cold temps, inverted, 9º here at the #HippieHaus, 21º at 9,100’… Dress in layers, stay warm, and get ready for a great day on the Mtn. Snow, wind affected, wind-loaded up top, wind-loaded.

Snow’s mid-winter shape, cold, on-piste is perfect, soft, carvable-schmoo. Off-piste, depending on elev:/aspect, wind-blown, playful, edgeable, and in some zones filled in for #Coldy-face-shots. Be aware of terrain traps, and tree-wells, YES, even at resorts. BC, Next SAC update is at 0700; check the latest (link below) before you head out today. Winds are creating Wind Slabs and other challenges, so check the latest, make the plan, and stick to it today. Forecast, sunny, with a high around 40º at lake level, upper mtn much cooler, with winds calming and a switch around 1300. With Upper Mtn Winds, be aware there may be some upper Mtn wind-holds, so be patient and have a ripping day, mìs amigos!

Current Sector Data (Verified @ 0615 PST)

Regional Temperatures:

  • South Lake Tahoe (KTLV) at 6,308’: 9ºF

  • Truckee (KTRK) at 5,899’: 7ºF

  • Palisades - Siberia (8,700’): 14ºF

  • Alpine Meadows (Scott Top 8,120’): 21ºF

  • KirkwoodMtn Chair 6 (9,100’): 21ºF

  • MammothMtn Summit (11,034’): 11ºF

Regional Winds (The Engine Room):

  • HippieHaus: E 6mph

  • Camp Rich: ESE 7mph

  • Mid-Lake Buoy (NW): E 6mph

  • Truckee: ESE 3mph

  • Donner Pass: E 6mph

  • Alpine Meadows (Mt Ward): SW 47/51mph

  • Palisades (Siberia): E 22/31mph

  • KirkwoodMtn (Chair 6): E 36/52mph (Honk’n)

  • MammothMtn Summit: NNE 44/53mph

Roads (CalTrans @ 0601 PST):

  • Status: Clear & Cold

  • SR88: No traffic restrictions reported.

  • HWY 50: No traffic restrictions reported.

  • I-80: No traffic restrictions reported.

  • Advisory: Watch for Black Ice due to refreezing snowmelt.

  • QuickMap: https://quickmap.dot.ca.gov/

Weather Ahead: The Ridge Returns

⚠️ Weather Advisories:

  • None Active. All Winter Weather and Lake Wind Advisories have expired.

  • Note: Freezing Fog (FZFG) is possible in Truckee/Martis Valley and Tahoe basins early this morning.

The NWS Deep Dive (REV vs. STO):
The storm cycle has exited stage right, and a dominant high-pressure ridge is building in. We are transitioning to a “Cold Morning / Sunny Day” pattern.

1. The Cold Start (Today):

  • NWS Reno (REV): Warns of a “bitterly cold” commute. Sierra valleys are seeing single-digit and even sub-zero temps.

  • Refreeze Risk: Yesterday’s snowmelt has likely turned to ice on untreated surfaces. Walkways and decks will be slick.

  • NWS Sacramento (STO): Agrees on the cold, noting temps in the teens/20s above 4500’. North winds will gradually decrease through the evening.

2. The Ridge Build (The Weekend):

  • Inversions: Both offices highlight “stout inversions” developing. This means haze in the urban valleys, but crystal-clear, warmer air in the higher elevations.

  • Temperatures: Gradual warming to near average by the end of the weekend. Highs in the 40s at lake level, but it might actually feel warmer on the summits due to the inversion.

3. The Outlook (Next Week):

  • Stagnant Pattern: High pressure parks over the West Coast. Expect dry weather, potential valley fog, and light winds through mid-January. #BluebirdDays are here.

Sierra Avalanche Centers

Central Sierra (Tahoe/Carson Pass):

  • Status: Moderate (Pocket Specific)

  • Issued: Thursday, Jan 8 (Expires: Friday, Jan 9 @ 4:00 AM).

  • Author: Brandon Schwartz

  • The Bottom Line: You could trigger an avalanche today in places where wind-drifted snow has filled in near ridgetops and gully features. The hazard is localized but real. Move cautiously around blowing snow areas.

  • Link: Sierra Avalanche Center Forecast

Eastside Region (Mammoth):

  • Status: Wind Slab Hazard

  • Issued: Thursday, Jan 8 (Expires: Friday, Jan 9 @ 7:00 AM).

  • Author: Greg Cunningham

  • The Bottom Line: Strong winds from all directions (swirling) have created fresh, reactive wind slabs. You may find these on all aspects today as winds shift. Largest slabs are in alpine terrain.

  • Link: Eastern Sierra Avalanche Center Forecast

✈️ Aviation Section

Current Status: VFR (Local FZFG)

  • Conditions: Generally VFR. The main concern is Freezing Fog (FZFG) and IFR/LIFR conditions at KTRK, KTVL, and KMMH during the overnight/early morning hours.

  • Winds: Strong north winds aloft (15-20 kts sustained, gusts 25-30 kts) will gradually decrease after 00Z Friday (4 PM today).

⚓ Tahoe Mariners Forecast

Advisory: None. (Lake Wind Advisory Expired).

  • Today: Partly cloudy -> Clearing. Light winds. Highs 34-40. Waves < 1 foot.

  • Tonight: Clear. Light winds. Lows 5-15 (Chilly!). Waves < 1 foot.

  • Saturday: Partly cloudy. Light winds. Highs 38-43.

  • Water Temp: 44.7ºF.

The Bottom Line: The “Freak Flag” winds ripped last night, rearranging the furniture on the upper mountain. Today is a day for tactical skiing—hunt the wind-buff, avoid the scoured patches, and enjoy the sunshine. It’s cold, crisp, and clear—the perfect setup for a ripping Friday on the hill.

Stay’nThirsty for POW,

Coop | RS#69

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

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

ECMWF AIFS AI - 0.25º Precipitable Water (Inches)

ECMWF AIFS AI [M] 0.25º 72hr Precipitation (Inches)

ECMWF AIFS AI Ens 0.25º - Probability of 24hr QPF >1” (%)

Chair Six(6) Ridge 1.9.26 - KirkwoodMtn - 9,100’

NAM 3Km 6hr Precip, MSLP, 850mb Temp (Cº)

NAM 3km Composite Reflectivity + Precip Type

NBM Para v5 2.5km 24-hr Snow (Inches)

NAM 3km | 24hr Snow (Kuchera Ratio) (Inches)

NAM 3km | 24hr Precipitation (in)

NAM 3km | 2m Temperatures - MIN ºf)

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

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

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

Weather map showing 24-hour snowfall accumulation in inches across parts of the southwestern United States, including Arizona, California, and Nevada, with various areas marked in shades of blue, pink, and purple indicating different snowfall amounts, valid for 6 AM on January 9, 2026.
Map showing 24-hour snowfall in inches across the southwestern United States, with varying snow depths marked in pink, purple, and blue, indicating areas with up to 27.9 inches of snow.

NAM 3km | 24-hr Snow (Inches) Utah

Weather map showing 24-hour snowfall forecast across the northern United States, with areas of heavy snowfall indicated by pink and purple colors, and lighter snow in blue. The map includes state boundaries, latitude and longitude lines, and snow accumulation amounts in inches.

NAM 3km | 24-hr Snow (Inches) Colorado

Weather map showing snow accumulation in centimeters across parts of the Pacific Northwest, including Washington and Oregon, for January 9, 2026, at 6 a.m. local time. Varying intensities of snow are depicted with color shading, with the highest accumulation reaching 159.7 cm.

NAM 3km | 24-hr Snow (Inches) WA

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

Weather map showing 24-hour snow accumulation across parts of the northwestern United States, with varying intensities indicated by colors from light blue to pink, and details about snow ratios and geographic coordinates.
Map showing 24-hour snowfall accumulation in inches across parts of the Pacific Northwest, including Washington and Oregon, with areas of high snowfall marked in pink and purple, indicating around 48 inches. The map also shows surrounding US states and Canada.

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

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

A weather map showing snow accumulation predictions in inches across parts of the northern United States on January 9, 2026, at 6 AM. The map highlights areas with varying snow levels, with some regions forecasted to receive over 14 inches of snow, especially in central regions with significant pink and purple areas indicating heavy snowfall.

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

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