Current Conditions
Temp2.0 C
RH19 %
WindNE 2 mph
RoadClosed
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
November 18, 2018 - 0930 HSTSnowPoor 0.0 oC6.2 oC
Summit Road Surface Observations Trend and UKIRT Web Cam

Ice Detector Network

Haukea Pass - No Hazardous Conditions Reported
Upper Switch Back - No Hazardous Conditions Reported
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
20181118 09:30:02 2562 521 4.913 6.2 0.0 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:29:52 2569 521 4.927 6.2 0.6 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:29:42 2567 529 4.855 6.1 0.0 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:29:32 2578 537 4.798 6.1 0.0 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:29:22 2559 521 4.909 6.1 0.0 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:29:12 2565 530 4.841 6.1 0.6 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:29:02 2556 536 4.768 6.1 0.0 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:28:52 2568 526 4.879 6.1 0.0 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:28:42 2559 523 4.897 6.0 0.0 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:28:32 2574 525 4.902 6.0 0.6 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:28:22 2573 526 4.889 6.0 0.6 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:28:12 2563 534 4.803 6.0 0.6 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:28:01 2553 525 4.863 5.8 0.6 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:27:52 2654 554 4.789 5.7 -1.1 4 4 SN1 SN1 16 16 0.10 0.10 4 POOR
20181118 09:27:42 2658 547 4.859 5.7 -0.6 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.