Current Conditions
Temp-1.5 C
RH92 %
WindSSW 59 mph
RoadClosed
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
December 17, 2017 - 1122 HSTGood 6.7 oC-1.9 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
20171217 11:22:43 5000 5000 1.000 -1.9 6.7 9 9 MAX MAX 1 1 0.90 0.90 0 GOOD
20171217 11:22:38 5000 5000 1.000 -1.9 6.1 9 9 MAX MAX 1 1 0.90 0.90 0 GOOD
20171217 11:22:33 5000 5000 1.000 -1.8 6.1 9 9 MAX MAX 1 1 0.90 0.90 0 GOOD
20171217 11:22:28 5000 5000 1.000 -1.8 6.1 9 9 MAX MAX 1 1 0.90 0.90 0 GOOD
20171217 11:22:23 4814 4856 0.991 -1.8 6.1 9 1 MAX DRY 1 1 0.90 0.90 0 GOOD
20171217 11:22:18 4949 4982 0.993 -1.8 7.2 9 15 MAX ERR 1 1 0.90 0.90 0 GOOD
20171217 11:22:13 5000 5000 1.000 -1.9 6.7 9 9 MAX MAX 1 1 0.90 0.90 0 GOOD
20171217 11:22:08 5000 5000 1.000 -1.9 6.7 9 9 MAX MAX 1 1 0.90 0.90 0 GOOD
20171217 11:22:03 4363 4344 1.004 -1.9 7.2 9 1 MAX DRY 1 1 0.90 0.90 0 GOOD
20171217 11:21:58 4310 4270 1.009 -1.9 6.7 9 1 MAX DRY 1 1 0.90 0.90 0 GOOD
20171217 11:21:53 5000 5000 1.000 -1.9 6.1 9 9 MAX MAX 1 1 0.90 0.90 0 GOOD
20171217 11:21:48 5000 5000 1.000 -1.9 6.1 9 9 MAX MAX 1 1 0.90 0.90 0 GOOD
20171217 11:21:43 5000 5000 1.000 -1.9 6.1 9 9 MAX MAX 1 1 0.90 0.90 0 GOOD
20171217 11:21:38 5000 5000 1.000 -1.9 6.1 9 9 MAX MAX 1 1 0.90 0.90 0 GOOD
20171217 11:21:33 5000 5000 1.000 -1.9 5.6 9 9 MAX MAX 1 1 0.90 0.90 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.