Current Conditions
Temp5.2 C
RH11 %
WindN 0 mph
RoadOpen (4x4)
Latest Summit Road Surface Observations
LocationDate - TimeConditionGrip Surface TempAir Temp
UKIRTMay 19, 2019 - 2155 HSTDryGood 3.3 oC4.3 oC
Haukea PassCLEAR
Upper Switch BackNot Operable
Summit Road Surface Observations Trend and UKIRT Web Cam
Latest Lens Code
Not Soiled
Raw UKIRT Road Surface Observations
Date HST xvalue yvalue ratio airtmpc sfctmpc ave cond
code		 cur cond
code		 ave fric
code		 cur fric
code		 soiled
lens		 grip
20190519 21:55:03 1918 1888 1.016 4.3 3.3 DRY DRY 0.82 0.82 0 GOOD
20190519 21:54:03 1919 1888 1.017 4.3 3.3 DRY DRY 0.82 0.82 0 GOOD
20190519 21:53:03 1919 1889 1.016 4.3 3.3 DRY DRY 0.82 0.82 0 GOOD
20190519 21:52:01 1919 1888 1.017 4.3 3.3 DRY DRY 0.82 0.82 0 GOOD
20190519 21:51:04 1921 1883 1.020 4.3 3.3 DRY DRY 0.82 0.82 0 GOOD
Ice Detector Network Road Surface Observations
Haukea Pass
Date HST xvalue yvalue ratio airtmpc sfctmpc ave cond
code		 cur cond
code		 ave fric
code		 cur fric
code		 soiled
lens		 grip RH
20190505 09:58:34 1705 2076 0.821 -2.81 -0.91 DRY DRY 0.82 0.80 6 GOOD 100.00
20190505 09:57:34 2066 2504 0.825 -2.87 -1.07 DRY DRY 0.82 0.82 2 GOOD 100.00
20190505 09:56:34 1823 2299 0.793 -2.87 -0.71 DRY DRY 0.80 0.80 2 GOOD 100.00
20190505 09:55:34 2299 3001 0.766 -2.85 -1.37 DRY DRY 0.82 0.82 2 GOOD 99.45
20190505 09:54:34 1219 1411 0.863 -2.93 -1.31 DRY FZW 0.77 0.75 4 GOOD 98.94
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.