Current Conditions
Temp7.5 C
RH7 %
WindSSE 4 mph
RoadOpen (4x4)
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
November 13, 2018 - 1011 HSTDryGood 20.0 oC7.9 oC
Summit Road Surface Observations Trend and UKIRT Web Cam

Ice Detector Network

Haukea Pass - No Hazardous Conditions Reported
Upper Switch Back - No Hazardous Conditions Reported
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
20181113 10:11:57 1808 1762 1.026 7.9 20.0 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:11:52 1812 1764 1.027 7.9 20.0 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:11:47 1801 1763 1.021 7.9 20.0 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:11:42 1808 1752 1.032 7.9 20.0 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:11:37 1812 1752 1.034 7.9 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:11:32 1808 1756 1.030 7.9 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:11:27 1802 1759 1.024 7.9 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:11:22 1805 1759 1.026 7.9 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:11:17 1802 1757 1.026 7.9 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:11:12 1802 1761 1.024 7.9 20.0 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:11:07 1810 1761 1.028 7.9 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:11:02 1802 1757 1.026 7.9 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:10:57 1801 1761 1.023 7.9 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:10:52 1807 1757 1.028 7.9 19.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20181113 10:10:47 1807 1759 1.027 7.9 20.0 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.