Maunakea Weather Center

Maunakea Road Conditions
Road Status: Open (4-Wheel Drive Please)
Tuesday, July 23, 2024 - 05:00 a.m.

Aloha and Good Morning,

The summit access road is OPEN to the public.

The DLNR has CLOSED the Humu`ula Trail due to eradication operations until Wednesday July 24 at 7:00 pm.

It is beneficial for all visitors to acclimate at the Visitor Information Station for at least 30 minutes before driving to the summit. It is unsafe for children under 13 years old to be on the summit as they have a high risk for high altitude sickness. It is also unsafe for anyone with pre-existing health conditions, pregnancy, or SCUBA diving in the last 24 hours to be on the summit.

The Maunakea Rangers will screen all vehicles to ensure they are 4WD, free of mud and vegetation that may carry invasive species, and have at least a half tank of fuel (full is best). No pets will be allowed up the summit access road or at the Visitor Information Station.

Mahalo, and drive safely,

Maunakea 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: Maunakea 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 will be closed to the public at the Visitor Information Station to ensure everyone's safety. The road will reopen as soon as the weather and road conditions are safe.

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.

Visitors to the summit are required to stop at the Visitor Information Station, at an elevation of 9,200 feet to acclimate to the altitude and read about the hazards. All visitors are advised that 4-wheel drive vehicles are required, they should be in good health and at least 13 years of age. For safety reasons, those with medical conditions such as asthma, heart conditions/problems, pregnancy or scuba diving within the last 24 hours, may not be permitted access beyond the Visitor Information Station. Animals, aerial drones, alcoholic beverages and open fires are not allowed. All vehicles attempting access should be clean to prevent the spread of invasive species on the mountain. Muddy vehicles will be turned away. Call 934-4550 for a recorded message about Visitor Information Station programs. If you are coming to the mountain today, please be sure to fuel and service your vehicle before you leave town.

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

Jul 23 2024, 19:45 HST Minimum Maximum UTC | HST
Temperature 35.6 oF 27.9 oF @ 23:22 46.7 oF @ 13:39 oC | K | F
Wind Chill 29.3 oF 14.0 oF @ 23:29 32.1 oF @ 19:29 oC | K | F
Relative Humidity 58% 11% @ 12:48 98% @ 05:11
Pressure 619 mb 618 mb @ 04:46 619 mb @ 22:28
Wind speed 8 mph 3 mph @ 19:27 30 mph @ 23:03 mph | Kts | m/s
Wind direction NE

dir | deg
Precipitation (as of 8 am) -5.56 mm

mm | inches
Fog Possibility

Random Web Cams
CFHT-C4 (Aimed NNE)

MK ASIVA Camera (Aimed UP)

IRTF Mauna Loa (Aimed South)

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)
Chance for fog/high humidity
Current HNL NWS Mountain Bulletin(s) - (Latest Forecast)
Winter Storm Warning/Watch/Advisory
Non-Precipitation Warning

Additional Information
Visiting Maunakea 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 Maunakea.