Current Conditions
Temp7.0 C
RH30 %
WindENE 15 mph
RoadOpen (4x4)
Road Status: Open (4-Wheel Drive Please)

Saturday, April 21, 2018 - 08:25 a.m.


After performing remedial work and grading, the summit access road is currently open to the public (subject to the emergency rule passed by the Board of Land and Natural Resources restricting access from 10:00 p.m. to 4:00 a.m.). Vehicular access above the Halepohaku area will be by 4-wheel drive only and no 2-wheel drive vehicles will be allowed past the end of the paved road.

More Information: Mauna Kea weather varies widely. A calm sunny day may quickly become treacherous with hurricane force winds and blizzard conditions. Summit winds above 120 mph are not uncommon. Snowstorms have even occurred during the summer months.

When conditions are too dangerous, the Summit Access road is closed at the Visitor Information Station to ensure everyone's safety. The road is re-opened as soon as the weather and the roads are safe again.

Traffic delays and road closures on the summit access road may also occur due to the use and transport of heavy equipment, slow vehicle movements, deliveries, road maintenance, stalled or abandoned vehicles, hikers and bikers. Remember that dust, fog or snow can reduce visibility and slow traffic. Specific road closure criteria is listed below:

1. Any ice or snow on the road.
2. Winds greater than 55 mph for one hour and/or gusts greater than 65 mph.
3. Visibility less than 50 feet.
4. Any emergent condition that makes the road unsafe for travel.

Mahalo for your understanding.

Public road conditions and snow report message: (808) 935-6268
Summit Weather via the CFHT/GEMINI WX Tower and SUBARU

Most Recent Previous 24 hours Options

Apr 23 2018, 14:37 HST Minimum Maximum UTC | HST
Temperature 44.6 oF 31.7 oF @ 22:37 46.1 oF @ 13:19 oC | K | F
Wind Chill 37.7 oF 18.4 oF @ 22:37 37.9 oF @ 14:28 oC | K | F
Relative Humidity 30% 15% @ 10:23 37% @ 13:29
Pressure 617 mb 617 mb @ 16:45 619 mb @ 10:52
Wind speed 15 mph 1 mph @ 01:36 25 mph @ 22:48 mph | Kts | m/s
Wind direction ENE

dir | deg
Precipitation (as of 8 am) -9.79 mm

mm | inches
Fog Not Likely

Random Web Cams

SMA/MLO Camera (Aimed South)

Subaru Cat Walk (Aimed South)

MLO Image (Aimed SW)

Check the MKWC Current Obs page for additional weather observations and the MKWC Web Cams page for more mountain cams.
Latest Mountain Warnings and Forecasts

Current MKWC Warning(s) - (Latest Forecast)
Current HNL NWS Mountain Bulletin(s) - (Latest Forecast)
Additional Information

Visiting Mauna Kea Observatories Information
Road is always closed the morning after a snowfall.
Road is always closed while snow removal equipment is in operation.
Road is closed when the pavement has ice/snow.
Snow removal equipment can only remove snow. Thermal heating is needed to remove the final layer of ice that usually forms under the snow.
Other information for visitors to Mauna Kea.