Hwy 80 at Truckee Scales Atmospheric Data: 12/12/2017 Summary  Detailed Graphs  Station List

  Temperature     Wind Precipitation Visibility
Timestamp Air Wet
Bulb
Dew-
point
24-hr
Max
24-hr
Min
Relative
Humidity
Atmospheric
Pressure
Avg
Speed
Avg
Dir
Spot
Speed
Spot
Dir
Max
Speed
Max
Dir
  Rate Situation Start End 1 hr 3 hr 6 hr 12 hr 24 hr   Situation
Date Time °F °F °F °F °F % in Hg mph ° mph ° mph ° Y/N in/hr text Date Time Date Time in in in in in mi text
12/12/2017 12:09 AM 17.42 17.24 16.34 47.12 8.60 95.0 Not Reported 0.00 N 0.00 N 0.67 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.13 Clear
12/12/2017 12:24 AM 17.24 17.06 16.16 47.12 8.60 95.0 Not Reported 0.00 N 0.00 SW 0.00 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.48 Clear
12/12/2017 12:39 AM 16.70 16.34 15.44 47.12 8.60 94.0 Not Reported 1.12 W 1.57 NW 0.00 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.38 Clear
12/12/2017 12:54 AM 16.52 16.34 15.62 47.12 8.60 96.0 Not Reported 1.12 NW 0.22 NW 1.79 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.80 Clear
12/12/2017 01:09 AM 16.52 16.34 15.62 47.12 8.60 96.0 Not Reported 0.00 N 0.00 W 1.34 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.64 Clear
12/12/2017 01:24 AM 15.80 15.62 14.90 47.12 8.60 96.0 Not Reported 0.22 NW 0.45 NW 0.00 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.41 Clear
12/12/2017 01:39 AM 16.16 15.98 15.26 47.12 8.60 96.0 Not Reported 0.22 NW 0.67 NW 2.24 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.63 Clear
12/12/2017 01:54 AM 15.26 15.08 14.18 47.12 8.60 95.0 Not Reported 2.01 NW 1.79 NW 2.46 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.59 Clear
12/12/2017 02:09 AM 14.72 14.54 13.64 47.12 8.60 95.0 Not Reported 0.00 N 0.00 NW 2.24 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.83 Clear
12/12/2017 02:24 AM 15.08 14.72 14.18 47.12 8.60 96.0 Not Reported 0.00 W 0.00 W 0.00 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.23 Clear
12/12/2017 02:39 AM 14.00 13.82 12.74 47.12 8.60 94.0 Not Reported 1.34 W 0.67 W 1.12 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.54 Clear
12/12/2017 02:54 AM 14.18 14.00 13.10 47.12 8.60 95.0 Not Reported 0.00 N 0.00 NE 0.00 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.29 Clear
12/12/2017 03:09 AM 13.82 13.64 12.56 47.12 8.60 94.0 Not Reported 0.00 N 0.00 W 0.00 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.87 Clear
12/12/2017 03:24 AM 13.82 13.64 12.56 47.12 8.60 94.0 Not Reported 0.00 N 0.00 NE 0.00 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.21 Clear
12/12/2017 03:39 AM 12.92 12.56 11.30 47.12 8.60 93.0 Not Reported 0.00 N 0.00 NW 0.00 N No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.06 Clear
12/12/2017 03:54 AM 12.74 12.38 11.12 47.12 8.60 93.0 Not Reported 0.00 W 1.12 W 0.00 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.73 Clear
12/12/2017 04:09 AM 12.56 12.38 11.30 47.12 8.60 94.0 Not Reported 1.12 NW 0.89 NW 1.79 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.91 Clear
12/12/2017 04:24 AM 12.74 12.56 11.48 47.12 8.60 94.0 Not Reported 1.12 NW 0.00 NW 2.24 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 0.09 Fog Not Patchy
12/12/2017 04:39 AM 12.74 12.56 11.48 47.12 8.60 94.0 Not Reported 1.12 NW 1.12 NW 2.24 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.35 Fog Not Patchy
12/12/2017 04:54 AM 12.20 11.84 10.58 47.12 8.60 93.0 Not Reported 0.22 NW 0.67 W 1.79 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.70 Fog Not Patchy
12/12/2017 05:09 AM 11.66 11.30 10.04 47.12 8.60 93.0 Not Reported 0.00 N 0.00 S 0.67 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.49 Fog Not Patchy
12/12/2017 05:24 AM 11.66 11.30 10.04 47.12 8.60 93.0 Not Reported 0.00 N 0.00 NE 0.00 SE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.60 Fog Not Patchy
12/12/2017 05:39 AM 11.84 11.48 10.22 47.12 8.60 93.0 Not Reported 0.00 NE 0.00 N 1.34 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.69 Clear
12/12/2017 05:54 AM 10.04 9.68 8.24 47.12 8.60 92.0 Not Reported 0.22 NW 0.45 NW 1.12 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.35 Clear
12/12/2017 06:09 AM 10.58 10.22 8.96 47.12 8.60 93.0 Not Reported 0.00 W 0.22 W 1.57 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.82 Clear
12/12/2017 06:24 AM 10.40 10.04 8.78 47.12 8.60 93.0 Not Reported 0.00 N 0.00 W 1.12 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.90 Clear
12/12/2017 06:39 AM 10.22 9.86 8.60 47.12 8.60 93.0 Not Reported 1.79 W 1.57 NW 0.67 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.94 Clear
12/12/2017 06:54 AM 10.22 9.86 8.60 47.12 8.60 93.0 Not Reported 0.00 NW 0.00 NW 1.34 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.51 Clear
12/12/2017 07:09 AM 10.04 9.68 8.24 47.12 8.60 92.0 Not Reported 0.00 NE 0.00 NE 0.89 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.59 Clear
12/12/2017 07:24 AM 9.68 9.32 7.88 47.12 8.60 92.0 Not Reported 0.00 N 0.00 NW 0.00 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.23 Clear
12/12/2017 07:39 AM 9.68 9.32 7.88 47.12 8.60 92.0 Not Reported 0.00 W 0.89 W 0.00 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.71 Clear
12/12/2017 07:54 AM 12.02 11.48 9.68 47.12 8.60 90.0 Not Reported 0.00 NW 0.67 W 0.67 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.99 Clear
12/12/2017 08:09 AM 12.92 12.38 10.58 47.12 8.60 90.0 Not Reported 0.00 N 0.00 W 2.68 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.93 Clear
12/12/2017 08:24 AM 16.16 15.62 14.00 47.12 8.60 91.0 Not Reported 0.45 E 1.12 SE 0.89 SE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.96 Clear
12/12/2017 08:39 AM 17.60 17.06 15.44 47.12 8.60 91.0 Not Reported 0.00 SE 1.34 E 2.24 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.71 Clear
12/12/2017 08:54 AM 20.30 19.40 17.06 47.12 8.60 87.0 Not Reported 0.22 E 0.00 SE 0.89 SE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.50 Clear
12/12/2017 09:09 AM 21.38 20.12 16.52 47.12 8.60 81.0 Not Reported 0.00 N 0.00 W 0.67 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.57 Clear
12/12/2017 09:24 AM 22.64 21.20 17.42 47.12 8.60 80.0 Not Reported 0.00 N 0.00 NW 0.89 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.89 Clear
12/12/2017 09:39 AM 27.50 25.16 19.76 47.12 8.60 72.0 Not Reported 0.00 NE 1.57 E 0.45 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.23 Clear
12/12/2017 09:54 AM 25.16 23.36 19.40 47.12 8.60 78.0 Not Reported 1.34 W 2.01 W 2.24 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.36 Clear
12/12/2017 10:09 AM 25.70 23.90 19.58 47.12 8.60 77.0 Not Reported 0.00 W 0.00 W 2.24 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.31 Clear
12/12/2017 10:24 AM 30.20 27.14 21.02 47.12 8.60 68.0 Not Reported 2.01 E 2.24 E 0.67 SW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.14 Clear
12/12/2017 10:39 AM 33.44 29.48 21.56 47.12 8.60 61.0 Not Reported 0.00 S 0.22 SE 3.13 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.33 Clear
12/12/2017 10:54 AM 35.24 30.74 22.46 47.12 8.60 59.0 Not Reported 0.00 N 0.00 E 1.12 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.96 Clear
12/12/2017 11:09 AM 34.16 30.02 21.74 47.12 8.60 60.0 Not Reported 0.22 S 0.00 E 1.79 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.41 Clear
12/12/2017 11:24 AM 35.06 30.56 22.28 47.12 8.60 59.0 Not Reported 0.00 W 0.89 W 0.22 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.40 Clear
12/12/2017 11:39 AM 36.68 31.64 22.10 47.12 8.60 55.0 Not Reported 2.24 NE 3.13 NE 1.57 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.88 Clear
12/12/2017 11:54 AM 37.22 31.82 21.74 47.12 8.60 53.0 Not Reported 2.68 NE 2.24 E 4.03 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.74 Clear
12/12/2017 12:09 PM 39.74 33.44 23.18 47.12 8.60 51.0 Not Reported 1.79 NE 0.00 N 4.25 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.57 Clear
12/12/2017 12:24 PM 41.72 34.52 22.64 47.12 8.60 46.0 Not Reported 0.89 N 1.34 NE 1.79 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.25 Clear
12/12/2017 12:39 PM 42.98 35.06 22.10 47.12 8.60 43.0 Not Reported 1.34 NW 1.57 W 1.57 N No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.65 Clear
12/12/2017 12:54 PM 45.68 36.50 21.56 47.12 8.60 38.0 Not Reported 1.79 E 1.12 SE 2.46 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.05 Clear
12/12/2017 01:09 PM 46.40 36.14 18.32 47.12 8.60 32.0 Not Reported 3.36 NE 0.67 E 3.13 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.53 Clear
12/12/2017 01:24 PM 47.12 35.96 15.80 47.12 8.60 28.0 Not Reported 2.46 NE 3.36 NE 4.25 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.83 Clear
12/12/2017 01:39 PM 48.56 37.22 17.78 47.12 8.60 29.0 Not Reported 2.46 E 3.80 NE 3.58 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.36 Clear
12/12/2017 01:54 PM 49.82 37.76 17.24 47.12 8.60 27.0 Not Reported 3.13 E 2.01 E 4.47 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.47 Clear
12/12/2017 02:09 PM 50.36 38.12 16.88 47.12 8.60 26.0 Not Reported 0.67 W 0.89 NW 4.25 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.66 Clear
12/12/2017 02:24 PM 50.36 37.58 14.00 47.12 8.60 23.0 Not Reported 0.67 N 0.89 N 2.91 N No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.90 Clear
12/12/2017 02:39 PM 50.18 37.58 14.90 47.12 8.60 24.0 Not Reported 0.45 N 1.12 NE 2.68 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.66 Clear
12/12/2017 02:54 PM 49.82 37.04 13.64 47.12 8.60 23.0 Not Reported 2.68 NE 4.03 NE 5.14 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.84 Clear
12/12/2017 03:09 PM 49.82 36.86 12.56 47.12 8.60 22.0 Not Reported 3.80 NE 0.00 NE 4.47 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.98 Clear
12/12/2017 03:24 PM 49.46 36.86 13.28 47.12 8.60 23.0 Not Reported 3.58 NE 2.46 NE 3.80 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.83 Clear
12/12/2017 03:40 PM 48.20 36.14 14.18 47.12 8.60 25.0 Not Reported 3.80 NE 2.24 NE 4.47 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.46 Clear
12/12/2017 03:54 PM 46.58 35.24 13.64 47.12 8.60 26.0 Not Reported 2.91 N 3.13 NE 4.70 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.21 Clear
12/12/2017 04:09 PM 45.14 34.52 14.00 50.54 9.50 28.0 Not Reported 4.47 NE 5.37 NE 5.14 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.00 Clear
12/12/2017 04:24 PM 43.52 33.44 13.46 50.54 9.50 29.0 Not Reported 4.47 NE 5.14 N 5.37 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.61 Clear
12/12/2017 04:40 PM 42.26 32.72 13.64 50.54 9.50 31.0 Not Reported 3.80 NE 3.13 NE 6.93 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.81 Clear
12/12/2017 04:54 PM 40.10 32.00 15.44 50.54 9.50 36.0 Not Reported 2.91 NE 2.01 NE 5.14 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.61 Clear
12/12/2017 05:09 PM 37.58 30.02 13.82 50.54 9.50 37.0 Not Reported 0.00 N 0.00 N 3.36 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.78 Clear
12/12/2017 05:24 PM 34.52 28.58 15.98 50.54 9.50 46.0 Not Reported 0.00 N 0.00 W 0.89 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.22 Clear
12/12/2017 05:39 PM 32.18 27.50 17.06 50.54 9.50 53.0 Not Reported 0.00 N 1.34 NW 0.22 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.19 Clear
12/12/2017 05:54 PM 31.82 27.68 19.22 50.54 9.50 59.0 Not Reported 0.00 N 1.12 NW 1.34 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.02 Clear
12/12/2017 06:09 PM 30.02 26.42 18.68 50.54 9.50 62.0 Not Reported 0.45 NW 0.89 NW 1.12 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.02 Clear
12/12/2017 06:24 PM 30.56 26.96 19.22 50.54 9.50 62.0 Not Reported 0.67 N 0.00 N 0.89 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.13 Clear
12/12/2017 06:39 PM 28.58 25.88 20.12 50.54 9.50 70.0 Not Reported 3.13 NW 2.46 NW 2.24 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.28 Clear
12/12/2017 06:54 PM 27.50 25.16 20.12 50.54 9.50 73.0 Not Reported 0.00 N 0.00 W 1.12 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.05 Clear
12/12/2017 07:09 PM 26.24 24.26 20.12 50.54 9.50 77.0 Not Reported 0.00 N 0.00 NW 0.00 N No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.48 Clear
12/12/2017 07:24 PM 26.06 24.08 19.40 50.54 9.50 75.0 Not Reported 0.00 N 0.00 S 0.00 S No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.95 Clear
12/12/2017 07:40 PM 25.70 23.72 19.40 50.54 9.50 77.0 Not Reported 0.00 N 0.00 N 0.00 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.84 Clear
12/12/2017 07:54 PM 24.80 23.00 19.04 50.54 9.50 78.0 Not Reported 0.45 NE 0.00 NE 0.67 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.98 Clear
12/12/2017 08:09 PM 24.26 23.00 19.94 50.54 9.50 83.0 Not Reported 0.45 NW 0.00 N 2.46 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.52 Clear
12/12/2017 08:24 PM 23.72 22.64 20.30 50.54 9.50 86.0 Not Reported 0.00 N 0.00 N 0.00 N No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 1.93 Clear
12/12/2017 08:39 PM 23.54 22.82 20.84 50.54 9.50 89.0 Not Reported 1.79 W 2.01 W 0.89 S No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.28 Clear
12/12/2017 08:54 PM 23.18 22.28 20.30 50.54 9.50 88.0 Not Reported 0.00 N 0.00 E 1.34 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.52 Clear
12/12/2017 09:09 PM 24.26 23.00 20.30 50.54 9.50 84.0 Not Reported 0.22 NE 0.22 NE 0.00 SE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.38 Clear
12/12/2017 09:24 PM 23.18 22.10 19.40 50.54 9.50 85.0 Not Reported 0.00 N 0.00 NW 0.00 E No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.57 Clear
12/12/2017 09:39 PM 22.82 21.92 19.58 50.54 9.50 87.0 Not Reported 0.22 E 0.00 SE 0.00 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.06 Clear
12/12/2017 09:55 PM 22.28 21.20 19.40 50.54 9.50 88.0 Not Reported 0.00 N 1.79 NW 0.45 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.80 Clear
12/12/2017 10:09 PM 19.94 19.40 17.60 50.54 9.50 90.0 Not Reported 3.58 W 3.58 NW 2.68 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.83 Clear
12/12/2017 10:24 PM 20.30 19.94 18.68 50.54 9.50 93.0 Not Reported 0.00 N 0.00 NE 2.01 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.83 Clear
12/12/2017 10:39 PM 20.30 20.12 19.22 50.54 9.50 95.0 Not Reported 1.12 W 0.22 W 0.00 N No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.54 Clear
12/12/2017 10:54 PM 19.40 19.04 17.96 50.54 9.50 94.0 Not Reported 0.00 N 0.00 SW 0.00 W No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.05 Clear
12/12/2017 11:09 PM 19.40 19.22 18.32 50.54 9.50 95.0 Not Reported 0.00 N 0.00 W 0.00 SW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 4.01 Clear
12/12/2017 11:24 PM 19.58 19.22 17.96 50.54 9.50 93.0 Not Reported 0.00 NE 0.00 NE 0.00 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 2.40 Clear
12/12/2017 11:39 PM 18.32 17.96 16.52 50.54 9.50 92.0 Not Reported 0.00 N 0.00 W 0.22 NE No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.17 Clear
12/12/2017 11:54 PM 18.14 17.78 16.88 50.54 9.50 94.0 Not Reported 1.79 NW 1.57 NW 2.68 NW No 0.000 No Precipitation     0.000 0.000 0.000 0.000 0.000 3.79 Clear