Current Conditions
Temp-5.5 C
RH33 %
WindSW 32 mph
Road Status: Closed

Saturday, February 16, 2019 - 06:11 p.m.

Aloha All,

The Mauna Kea Summit Access Road is now closed to the public at the Visitor Information Station at an elevation of 9,200 feet level due to the following conditions: Fog/ic and possibility for afternoon convection. The Mauna Kea Weather Condition posted a possibility of patches of clouds in the area mainly during the first half of the night. Therefore, the Mauna Kea Rangers reported increasing winds, dropping and freezing temperatures for this evening. As a precaution, the summit access road will remain closed throughout the night. This message will be updated accordingly.

The Maunakea Rangers thank you for your patience and understanding.


Maunakea Rangers

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

Feb 17 2019, 07:59 UTC Minimum Maximum UTC | HST
Temperature 267.7 oK 266.1 oK @ 15:06 273.3 oK @ 02:02 oC | K | F
Wind Chill 257.5 oK 256.7 oK @ 15:08 284.2 oK @ 08:29 oC | K | F
Relative Humidity 33% 7% @ 06:05 95% @ 09:13
Pressure 612 mb 611 mb @ 15:35 613 mb @ 20:38
Wind speed 32 mph 0 mph @ 08:29 37 mph @ 05:49 mph | Kts | m/s
Wind direction 216 o

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

mm | inches
Fog Not Likely

Random Web Cams

IRTF1 (Aimed West)

Subaru Cat Walk (Aimed South)

Keck Cosmic Cam (Aimed UKN)

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/ice
Possibility 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.