Current Conditions
Temp2.4 C
RH16 %
WindSSW 23 mph
RoadOpen (4x4)
Latest Summit Road Surface Observations

Date - TimeConditionGrip Surface TempAir Temp
September 19, 2017 - 2314 HSTDryGood -1.1 oC1.4 oC
Summit Road Surface Observations Trend and UKIRT Web Cam

Latest Lens Code

Not Soiled
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
20170919 23:14:11 1943 1945 0.999 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:14:06 1941 1947 0.997 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:14:01 1943 1947 0.997 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:13:47 1943 1950 0.996 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:13:42 1943 1947 0.997 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:13:37 1944 1946 0.999 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:13:32 1941 1945 0.998 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:13:27 1941 1949 0.996 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:13:22 1943 1946 0.998 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:13:17 1940 1947 0.996 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:13:12 1941 1947 0.997 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:13:07 1940 1946 0.997 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:13:02 1944 1949 0.997 1.4 -1.1 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:12:57 1941 1946 0.997 1.4 -0.6 1 1 DRY DRY 2 2 0.80 0.80 0 GOOD
20170919 23:12:52 1945 1947 0.999 1.4 -0.6 1 1 DRY DRY 2 2 0.80 0.80 0 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.