Current Conditions
Temp4.1 C
RH21 %
WindESE 4 mph
RoadOpen (4x4)
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
August 19, 2017 - 1756 HSTDryGood 10.6 oC2.4 oC
Summit Road Surface Observations Trend and UKIRT Web Cam

Latest Lens Code

Not Soiled
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
20170819 17:56:57 2150 2079 1.034 2.4 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:56:52 2151 2076 1.036 2.4 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:56:47 2153 2078 1.036 2.4 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:56:42 2151 2079 1.035 2.4 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:56:37 2153 2078 1.036 2.4 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:56:32 2149 2081 1.033 2.4 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:56:27 2149 2079 1.033 2.4 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:56:22 2150 2078 1.035 2.4 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:56:17 2148 2077 1.034 2.4 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:56:12 2150 2078 1.035 2.4 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:56:07 2153 2078 1.036 2.4 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:56:01 2150 2078 1.035 2.4 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:55:48 2150 2078 1.035 2.5 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:55:43 2149 2081 1.033 2.5 11.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 17:55:38 2151 2078 1.035 2.5 10.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
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.