Current Conditions
Temp-0.5 C
RH11 %
WindWSW 34 mph
RoadOpen (4x4)
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
December 15, 2017 - 1329 HSTDryGood 18.9 oC2.2 oC
Summit Road Surface Observations Trend and UKIRT Web Cam

Latest Lens Code

Received optical signal is low enough that lens could be "Soiled" if condition continues for a long time. Note that a 4 reading is normal in adverse weather conditions.
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
20171215 13:29:36 1746 1746 1.000 2.2 18.9 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:29:31 1751 1740 1.006 2.2 18.9 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:29:26 1750 1733 1.010 2.2 18.9 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:29:21 1750 1728 1.013 2.2 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:29:16 1750 1734 1.009 2.2 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:29:11 1753 1735 1.011 2.2 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:29:06 1757 1733 1.014 2.2 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:29:01 1758 1726 1.018 2.2 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:28:56 1753 1730 1.013 2.2 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:28:51 1751 1736 1.008 2.2 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:28:46 1750 1735 1.008 2.2 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:28:41 1750 1729 1.012 2.2 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:28:36 1756 1742 1.008 2.2 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:28:31 1756 1736 1.011 2.2 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20171215 13:28:26 1751 1737 1.008 2.2 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 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.