Current Conditions
Temp-3.0 C
RH96 %
WindE 9 mph
RoadClosed
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
January 23, 2018 - 0144 HSTWet (Damp)Fair -3.3 oC-3.5 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
20180123 01:44:03 1225 824 1.486 -3.5 -3.3 1 2 DRY WT1 8 9 0.50 0.40 4 FAIR
20180123 01:43:53 1258 855 1.471 -3.5 -3.3 1 2 DRY WT1 8 9 0.50 0.40 4 FAIR
20180123 01:43:43 1414 1005 1.407 -3.5 -3.3 1 1 DRY DRY 8 8 0.50 0.50 4 FAIR
20180123 01:43:33 1242 836 1.485 -3.5 -3.3 1 2 DRY WT1 8 9 0.50 0.40 4 FAIR
20180123 01:43:23 1234 829 1.489 -3.5 -3.3 1 2 DRY WT1 8 9 0.50 0.40 4 FAIR
20180123 01:43:13 1320 905 1.459 -3.5 -3.3 1 1 DRY DRY 8 9 0.50 0.40 4 FAIR
20180123 01:43:03 1388 972 1.428 -3.5 -3.3 1 1 DRY DRY 8 8 0.50 0.50 4 FAIR
20180123 01:42:53 1491 1068 1.395 -3.5 -3.3 1 1 DRY DRY 8 8 0.50 0.50 4 FAIR
20180123 01:42:43 1509 1087 1.389 -3.5 -3.3 1 1 DRY DRY 8 8 0.50 0.50 4 FAIR
20180123 01:42:33 1504 1077 1.397 -3.5 -3.3 1 1 DRY DRY 8 8 0.50 0.50 4 FAIR
20180123 01:42:23 1410 995 1.417 -3.3 -3.3 1 1 DRY DRY 8 8 0.50 0.50 4 FAIR
20180123 01:42:13 1444 1028 1.405 -3.3 -3.3 1 1 DRY DRY 8 8 0.50 0.50 4 FAIR
20180123 01:42:01 1587 1158 1.371 -3.3 -3.3 1 1 DRY DRY 8 8 0.50 0.50 4 FAIR
20180123 01:41:53 1354 918 1.475 -3.3 -3.3 1 1 DRY DRY 9 9 0.40 0.40 4 FAIR
20180123 01:41:43 1410 973 1.449 -3.3 -3.3 1 1 DRY DRY 9 9 0.40 0.40 4 FAIR
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.