Current Conditions
Temp3.2 C
RH21 %
WindW 22 mph
RoadOpen (4x4)
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
March 18, 2019 - 0824 HSTDryGood 4.4 oC7.2 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
20190318 08:24:58 1839 1790 1.027 7.2 4.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:24:53 1834 1785 1.027 7.2 4.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:24:48 1834 1792 1.023 7.2 4.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:24:43 1831 1786 1.025 7.2 4.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:24:38 1834 1790 1.025 7.2 4.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:24:33 1835 1790 1.025 7.2 4.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:24:28 1840 1789 1.029 7.2 4.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:24:23 1833 1790 1.024 7.2 4.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:24:18 1834 1791 1.024 7.2 5.0 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:24:13 1835 1788 1.027 7.2 5.0 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:24:08 1833 1785 1.027 7.2 4.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:24:02 1839 1789 1.028 7.2 4.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:23:51 1830 1794 1.020 6.9 3.9 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:23:46 1824 1791 1.018 6.9 3.9 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20190318 08:23:41 1821 1788 1.018 6.9 3.9 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.