Current Conditions
Temp-4.6 C
RH95 %
WindSW 42 mph
RoadClosed
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
February 19, 2018 - 1122 HSTSnowPoor -1.1 oC-2.5 oC
Summit Road Surface Observations Trend and UKIRT Web Cam

Latest Lens Code

Received optical signal is low enough that lens could be "Soiled" if condition continues for a long time. Note that a 4 reading is normal in adverse weather conditions.
Raw Summit Road Surface Observations

Date HST xvalue yvalue ratio airtmpc sfctmpc ave cond
index
cur cond
index
ave cond
code
cur cond
code
ave fric
index
cur fric
index
ave fric
code
cur fric
code
soiled
lens
grip
20180219 11:22:01 1431 81 17.758 -2.5 -1.1 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:21:51 1425 77 18.524 -2.5 -1.7 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:21:41 1426 81 17.697 -2.6 -1.7 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:21:31 1426 77 18.540 -2.6 -1.7 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:21:21 1424 79 17.938 -2.6 -1.7 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:21:11 1425 77 18.524 -2.6 -1.7 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:21:01 1425 77 18.524 -2.6 -1.7 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:20:51 1422 79 17.923 -2.6 -1.7 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:20:41 1424 76 18.806 -2.6 -1.7 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:20:31 1425 77 18.524 -2.6 -1.1 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:20:21 1422 77 18.492 -2.6 -1.1 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:20:11 1424 77 18.508 -2.6 -1.1 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:20:01 1425 79 17.954 -2.6 -1.1 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:19:51 1424 82 17.403 -2.6 -1.1 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20180219 11:19:41 1425 81 17.682 -2.6 -1.7 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
Disclaimer

The road surface condition detector cannot determine the road surface condition when there is fog. However, if the temperature is near freezing and fog is present, road ice is highly likely.

The road surface condition detector only looks at a one foot diameter area of asphalt located on the summit ridge adjacent to the United Kingdom Infra-Red Telescope. As Mauna Kea has many micro-climates, the detector may indicate the road is clear while hazardous conditions exist in other locations.