Current Conditions
Temp13.7 C
RH25 %
WindNE 5 mph
RoadOpen (4x4)
Latest Summit Road Surface Observations

LocationDate - TimeConditionGrip Surface TempAir Temp
UKIRTMay 20, 2019 - 1331 HSTDryGood 42.2 oC10.0 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
20190520 13:31:32 1895 1857 1.020 10.0 42.2 DRY DRY 0.80 0.80 0 GOOD
20190520 13:30:32 1889 1867 1.012 9.9 42.8 DRY DRY 0.80 0.80 0 GOOD
20190520 13:29:32 1891 1864 1.014 9.9 41.7 DRY DRY 0.80 0.80 0 GOOD
20190520 13:28:32 1889 1855 1.018 9.9 41.7 DRY DRY 0.80 0.80 0 GOOD
20190520 13:27:32 1895 1853 1.022 10.0 42.2 DRY DRY 0.80 0.80 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.