Current Conditions
Temp5.1 C
RH27 %
WindESE 4 mph
RoadOpen (4x4)
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
August 19, 2017 - 0838 HSTDryGood 11.7 oC4.7 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 08:38:52 2104 2095 1.004 4.7 11.7 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:38:47 2100 2092 1.004 4.7 11.7 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:38:42 2105 2096 1.004 4.7 11.7 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:38:37 2099 2103 0.998 4.7 11.7 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:38:32 2098 2100 0.999 4.7 11.7 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:38:27 2105 2096 1.004 4.7 11.7 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:38:22 2107 2100 1.003 4.7 11.7 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:38:17 2103 2099 1.002 4.7 11.7 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:38:12 2101 2095 1.003 4.7 11.7 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:38:07 2100 2098 1.001 4.7 11.7 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:38:02 2101 2098 1.002 4.7 12.2 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:37:57 2105 2095 1.005 4.7 11.7 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:37:52 2103 2096 1.003 4.7 12.2 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:37:47 2109 2093 1.008 4.7 12.2 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170819 08:37:42 2101 2095 1.003 4.7 11.7 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.