Current Conditions
Temp6.6 C
RH59 %
WindENE 8 mph
RoadOpen (4x4)
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
September 20, 2018 - 1601 HSTDryGood 36.1 oC8.9 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
20180920 16:01:23 1707 1664 1.026 8.9 36.1 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:01:18 1709 1667 1.026 8.9 36.1 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:01:13 1707 1665 1.025 8.9 36.1 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:01:08 1713 1667 1.028 8.9 35.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:01:03 1712 1669 1.026 8.9 35.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:00:58 1712 1664 1.029 8.9 35.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:00:53 1718 1663 1.033 8.9 35.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:00:48 1709 1664 1.027 8.9 35.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:00:43 1719 1667 1.032 8.9 35.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:00:38 1717 1661 1.034 8.9 35.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:00:33 1717 1661 1.034 8.9 35.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:00:28 1712 1665 1.028 8.9 36.1 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:00:23 1706 1664 1.025 8.9 36.1 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:00:18 1712 1662 1.030 8.9 36.1 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180920 16:00:13 1718 1659 1.035 8.9 36.1 1 1 DRY DRY 3 3 0.70 0.70 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.