Current Conditions
Temp9.4 C
RH50 %
WindNNE 8 mph
RoadOpen (4x4 only)
MAUNA KEA SUMMIT ROAD CONDITIONS
Road Status: Open (4-Wheel Drive Only)
Comments

Saturday, August 22, 2015 - 07:25 a.m.

Aloha,

The road to the summit is currently open to all visitors and observatory personnel, please exercise caution as weather conditions are difficulty with fog, rain, dipping temperatures, and potential for ice. The road could close with short notice if conditions deteriorate. This message will be updated accordingly as conditions change.

After performing remedial work and grading, the summit access road will be re-opened (subject to the emergency rule pass by the Board of Land and Natural Resources restricting access from 10:00 p.m. to 4:00 a.m.). Vehicular access above the Halepohaku area will be by 4-wheel drive only and no 2-wheel drive vehicles will be allowed past the end of the paved road.

Please drive safely.

Mahalo,

Mauna Kea Rangers

There are fewer weather related road closures from April through November, and this message will not be updated during this time period unless necessary.

The rest of this website is regularly updated with the summit weather forecast and is a useful source of current Maunakea 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 Road Surface Observations

Date - TimeConditionGrip Surface Temperature
Aug 29, 2015 - 1054 HSTDryGood 36.1 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

Aug 29 2015, 10:54 HST Minimum Maximum UTC | HST
Temperature 48.9 oF 37.9 oF @ 22:44 52.7 oF @ 12:00 oC | K | F
Wind Chill 45.4 oF 32.1 oF @ 22:44 46.7 oF @ 10:48 oC | K | F
Relative Humidity 50% 27% @ 07:38 80% @ 15:01
Pressure 619 mb 618 mb @ 05:50 620 mb @ 11:43
Wind speed 4 m/s 0 m/s @ 10:45 8 m/s @ 13:45 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

MLO Image (Aimed SW)

IRTF2 (Aimed South)

Keck1 (Aimed NNE)

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)
Small chances for episodes of high relative humidity
Current HNL NWS Mountain Bulletin(s) - (Latest Forecast)
None
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.
Maps