Current Conditions
Temp4.0 C
RH83 %
WindS 0 mph
RoadOpen (4x4)
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
September 25, 2018 - 1933 HSTDryGood 5.6 oC3.9 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
20180925 19:33:33 1675 1641 1.021 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:33:23 1674 1640 1.021 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:33:13 1676 1637 1.024 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:33:03 1675 1642 1.020 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:32:53 1673 1639 1.021 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:32:43 1673 1640 1.020 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:32:33 1674 1639 1.022 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:32:23 1675 1637 1.023 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:32:13 1673 1639 1.021 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:32:03 1674 1636 1.023 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:31:53 1674 1637 1.022 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:31:43 1674 1639 1.022 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:31:33 1673 1641 1.019 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:31:23 1673 1637 1.022 3.9 5.6 1 1 DRY DRY 3 3 0.70 0.70 4 GOOD
20180925 19:31:13 1673 1639 1.021 3.9 5.6 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.