Latest Summit Road Surface Observations
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| Location | Date - Time | Condition | Grip |
Surface Temp | Air Temp |
| UKIRT | December 11, 2019 - 0536 HST | Dry | Good |
-4.4 oC | 1.2 oC |
| Haukea Pass | CLEAR |
| Upper Switch Back | No new data from Icesight |
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Summit Road Surface Observations Trend and UKIRT Web Cam
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Latest Lens Code
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| 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. |
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Raw UKIRT Road Surface Observations
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| 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 |
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Ice Detector Network Road Surface Observations
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| 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 |
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Disclaimer
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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.
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