Current Conditions
Temp5.8 C
RH13 %
WindESE 2 mph
RoadOpen (4x4)
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
March 26, 2017 - 1245 HSTDryGood 43.9 oC11.8 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
20170326 12:45:43 1849 1786 1.035 11.8 43.9 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:45:38 1842 1791 1.029 11.8 43.9 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:45:33 1844 1792 1.029 11.8 43.9 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:45:28 1841 1791 1.028 11.8 43.9 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:45:23 1852 1792 1.033 11.8 43.9 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:45:18 1846 1785 1.034 11.8 44.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:45:13 1845 1786 1.033 11.7 44.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:45:08 1855 1792 1.035 11.7 44.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:45:03 1846 1790 1.031 11.7 44.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:44:58 1855 1791 1.035 11.7 44.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:44:52 1850 1791 1.033 11.7 44.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:44:47 1846 1788 1.033 11.7 44.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:44:42 1855 1792 1.035 11.7 44.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:44:37 1851 1791 1.033 11.7 44.4 1 1 DRY DRY 2 2 0.80 0.80 4 GOOD
20170326 12:44:32 1851 1795 1.031 11.7 44.4 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.