Current Conditions
Temp-2.6 C
RH39 %
WindWSW 11 mph
Road Status: Closed

Wednesday, April 01, 2020 - 08:19 p.m.


The access road to the summit of Maunakea is closed to the public at the Visitor Information Station at an elevation of 9200 ft due to high humidity, fog, freezing temperatures, with possible snow and icy road conditions. We have been monitoring the summits road and weather conditions throughout the day finding no decrease in humidity or increase in temperture. We also have a forecast of high humidity, fog, freezing temperature with possible snow and icy road conditions.

We will continue to monitor the summit road and weather conditions with updates to follow.

We thank you for your patience and understanding.

Mahalo, Maunakea Ranger

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

Apr 02 2020, 01:44 HST Minimum Maximum UTC | HST
Temperature -2.5 oC -3.6 oC @ 05:16 0.3 oC @ 15:00 oC | K | F
Wind Chill -8.1 oC -12.2 oC @ 02:31 11.5 oC @ 00:08 oC | K | F
Relative Humidity 39% 46% @ 01:37 100% @ 19:13
Pressure 613 mb 612 mb @ 04:40 614 mb @ 10:41
Wind speed 11 mph 0 mph @ 00:08 31 mph @ 02:52 mph | Kts | m/s
Wind direction WSW

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

mm | inches
Fog Not Likely

Random Web Cams

Gemini Telescope (Aimed South)

Gemini South (Aimed South)

JCMT (Aimed Variable)

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)
High humidity, fog and ice
Chance for afternoon convection
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.