Current Conditions
Temp-1.4 C
RH27 %
WindNW 0 mph
Road Status: Closed

Monday, March 02, 2015 - 05:01 a.m.


The road to the summit is currently closed due to ice and snow. Weather conditions will be updated as the night unfolds.

Thank you and stay safe,

VIS Staff

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 Road Surface Observations

Date - TimeConditionGrip Surface Temperature
Mar 02, 2015 - 0855 HSTSnowPoor -11.7 oC
The conditions above represent a 1 foot diameter section of road on the summit and you should not assume conditions on the rest of the road are the same. For more details, see Summit Road Surface Observations.
Summit Weather via the CFHT/GEMINI WX Tower and SUBARU

Most Recent Previous 24 hours Options

Mar 02 2015, 08:55 HST Minimum Maximum UTC | HST
Temperature -1.4 oC -3.5 oC @ 19:12 -0.3 oC @ 14:43 oC | K | F
Wind Chill 12.3 oC -11.6 oC @ 17:10 12.1 oC @ 08:48 oC | K | F
Relative Humidity 27% 28% @ 08:16 96% @ 18:57
Pressure 616 mb 613 mb @ 16:24 616 mb @ 11:06
Wind speed 0 mph 0 mph @ 08:48 46 mph @ 14:41 mph | Kts | m/s
Wind direction VAR

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

mm | inches
Fog Not Likely

Random Web Cams

SMA/MLO Camera (Aimed South)

UH88 All Sky Camera (Aimed Up)

Subaru Cat Walk (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)
Fog/ice, high humidity and flurries
Chance for convection and heavy snow
Current HNL NWS Mountain Bulletin(s) - (Latest Forecast)
Winter Storm Warning/Watch/Advisory
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, including safety, summit tours, and public star-gazing.