Current Conditions
Temp2.2 C
RH32 %
WindE 7 mph
RoadClosed
Latest Summit Road Surface Observations

LocationDate - TimeConditionGrip Surface TempAir Temp
UKIRTDecember 11, 2019 - 0536 HSTDryGood -4.4 oC1.2 oC
Haukea PassCLEAR
Upper Switch BackNo new data from Icesight
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 UKIRT Road Surface Observations

Date HST xvalue yvalue ratio airtmpc sfctmpc ave cond
code
cur cond
code
ave fric
code
cur fric
code
soiled
lens
grip
20191211 05:36:02 1741 1761 0.989 1.2 -4.4 DRY DRY 0.80 0.80 4 GOOD
20191211 05:35:02 1739 1762 0.987 1.2 -4.4 DRY DRY 0.80 0.80 4 GOOD
20191211 05:34:02 1740 1761 0.988 1.2 -5.0 DRY DRY 0.80 0.80 4 GOOD
20191211 05:33:03 1741 1764 0.987 1.1 -5.0 DRY DRY 0.80 0.80 4 GOOD
20191211 05:32:03 1737 1762 0.986 1.2 -5.0 DRY DRY 0.80 0.80 4 GOOD
Ice Detector Network Road Surface Observations

Haukea Pass
Date HST xvalue yvalue ratio airtmpc sfctmpc ave cond
code
cur cond
code
ave fric
code
cur fric
code
soiled
lens
grip RH
20191124 07:48:35 471 369 1.278 3.13 -0.25 WT2 WT2 0.50 0.50 4 FAIR 56.00
20191124 07:48:35 473 369 1.281 3.11 -0.29 WT2 WT2 0.50 0.50 4 FAIR 55.93
20191124 07:27:08 814 411 1.979 2.21 -0.79 IC1 IC1 0.30 0.30 4 FAIR 64.75
20191124 07:25:08 855 431 1.983 1.91 -0.93 IC1 IC1 0.30 0.30 4 FAIR 64.98
20191124 07:23:08 860 432 1.989 1.61 -1.41 IC1 IC1 0.30 0.30 4 FAIR 65.88
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.