Current Conditions
Temp0.9 C
RH96 %
WindSSW 24 mph
Road Status: Closed

Monday, October 23, 2017 - 04:12 a.m.

The road to the summit of Mauna Kea is closed at the Visitor Information Station due to high humidity, heavy fog, below freezing temperatures, and reports of frost on the ground. We will continue to monitor the conditions and update this message as necessary. Thank you for your patience and understanding.

MK Rangers

This announcement is primarily used to inform the public about road closures. Road closures typically occur during winter months due to ice or snow on the road and occasionally for high wind situations. Specific road closure criteria are listed below:

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

There are very few road closures from April 1 through November 30, and this message will not be updated during this time period unless unusual circumstances develop.

The rest of this website is regularly updated with the summit weather forecast and is a useful source of current Mauna Kea weather conditions.

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

Oct 23 2017, 06:47 HST Minimum Maximum UTC | HST
Temperature 33.7 oF 28.8 oF @ 00:54 44.8 oF @ 15:51 oC | K | F
Wind Chill 21.2 oF 12.0 oF @ 01:29 32.6 oF @ 17:25 oC | K | F
Relative Humidity 96% 10% @ 18:22 96% @ 06:38
Pressure 617 mb 617 mb @ 05:44 621 mb @ 10:10
Wind speed 24 mph 0 mph @ 11:46 41 mph @ 01:29 mph | Kts | m/s
Wind direction SSW

dir | deg
Precipitation (as of 8 am) 0.00 mm

mm | inches
Fog Imminent

Random Web Cams

MK Visitor Center (Aimed South)

MLO Image (Aimed SW)

MLO Solar Radiation Deck (Aimed East)

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)
Moderate/strong (tapering) winds
Chance for moisture on Sunday
Current HNL NWS Mountain Bulletin(s) - (Latest Forecast)
Non-Precipitation Warning
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.