Weather observations for the past three days for
Half Moon Bay Airport
Imperial (Metric)
Date Time (pst) Wind (mph) Vis. (mi.) Weather Sky Cond. Temperature (ºF) Relative Humidity Wind Chill (°F) Heat Index (°F) Pressure Precipitation (in)
Air Dwpt 6 hour altimeter (in) sea level (mb) 1 hr 3 hr 6 hr
Max. Min.
26 09:35 S 8 4.00 Fog/Mist OVC012 55.4 55.4 100% 30.18 0.0
26 09:15 SE 7 4.00 Fog/Mist BKN007 OVC013 53.6 53.6 100% 30.17 0.0
26 08:55 S 8 3.00 Fog/Mist BKN005 OVC010 53.6 53.6 100% 30.16 0.0
26 08:35 S 12 1.75 Fog/Mist OVC008 53.6 53.6 100% 30.14 0.0
26 08:15 SE 5 4.00 Fog/Mist BKN009 BKN013 53.6 53.6 100% 30.16 0.0
26 07:55 SE 6 1.00 Fog/Mist OVC008 53.6 53.6 100% 30.14 0.0 0.02
26 07:35 SE 5 1.25 Fog/Mist OVC008 51.8 51.8 100% 30.15 0.0
26 07:15 SE 5 1.25 Fog/Mist OVC007 51.8 51.8 100% 30.14 0.0
26 06:55 S 6 3.00 Fog/Mist OVC007 51.8 51.8 100% 30.13 0.0 0.02
26 06:35 S 9 0.75 Fog/Mist OVC007 51.8 51.8 100% 30.15 0.0
26 06:15 SE 8 2.00 Fog/Mist OVC007 51.8 51.8 100% 30.14 0.0
26 05:55 S 7 2.00 Fog/Mist BKN007 OVC014 53.6 53.6 100% 30.14 0.0
26 05:35 Calm 1.25 Fog/Mist SCT006 BKN011 OVC015 53.6 53.6 100% 30.15 0.0
26 05:15 SE 7 1.00 Fog/Mist FEW004 OVC014 53.6 53.6 100% 30.14 0.0
26 04:55 S 6 5.00 Fog/Mist OVC013 53.6 53.6 100% 30.14 0.0
26 04:35 S 9 2.00 Fog/Mist OVC015 53.6 53.6 100% 30.13 0.0
26 04:15 SE 8 4.00 Fog/Mist OVC016 53.6 53.6 100% 30.13 0.0
26 03:55 S 9 4.00 Fog/Mist OVC017 55.4 51.8 88% 30.13 0.0
26 03:35 SE 7 6.00 Overcast with Haze FEW013 OVC019 55.4 50 82% 30.15 0.0
26 03:15 SE 7 7.00 Overcast OVC020 53.6 50 88% 30.15 0.0
26 02:55 SE 8 9.00 Overcast OVC020 53.6 48.2 82% 30.17 0.0
26 02:35 SE 5 10.00 Overcast OVC020 53.6 46.4 77% 30.18 0.0
26 02:15 SE 6 10.00 Overcast OVC023 53.6 44.6 72% 30.17 0.0
26 01:55 SE 8 G 14 9.00 Overcast OVC021 51.8 42.8 72% 30.15 0.0
26 01:35 SE 9 8.00 Overcast OVC021 51.8 42.8 72% 30.17 0.0
26 01:15 SE 7 6.00 Overcast with Haze OVC021 51.8 44.6 77% 30.19 0.0
26 00:55 SE 13 8.00 Overcast OVC024 51.8 46.4 82% 30.18 0.0
26 00:35 SE 7 8.00 Overcast OVC027 50 44.6 82% 48 30.23 0.0
26 00:15 SE 6 8.00 Overcast OVC026 50 44.6 82% 48 30.23 0.0
25 23:55 SE 8 8.00 Overcast OVC026 50 44.6 82% 47 30.23 0.0
25 23:35 SE 7 9.00 Overcast OVC027 50 42.8 76% 48 30.22 0.0
25 23:15 Calm 10.00 Overcast OVC028 48.2 44.6 87% 30.23 0.0
25 22:55 Calm 9.00 Overcast SCT030 OVC037 48.2 44.6 87% 30.23 0.0
25 22:15 Calm 9.00 Overcast BKN003 BKN036 OVC043 46.4 42.8 87% 30.23 0.0
25 21:55 Calm 10.00 Mostly Cloudy BKN036 BKN041 46.4 44.6 93% 30.24 0.0
25 21:35 Calm 9.00 Partly Cloudy SCT035 48.2 46.4 94% 30.21 0.0
25 21:15 Calm 9.00 Fair CLR 48.2 46.4 94% 30.19 0.0
25 20:55 SE 5 9.00 Fair CLR 48.2 48.2 100% 47 30.19 0.0
25 20:35 Calm 9.00 A Few Clouds FEW037 50 50 100% 30.2 0.0
25 20:15 Calm 9.00 Fair CLR 50 50 100% 30.21 0.0
25 19:55 Calm 9.00 Fair CLR 50 50 100% 30.22 0.0
25 19:35 Calm 7.00 Fair CLR 50 50 100% 30.23 0.0
25 19:15 E 3 7.00 A Few Clouds FEW004 FEW013 50 50 100% 30.22 0.0
25 18:55 E 5 5.00 Fog/Mist FEW004 FEW013 50 50 100% 49 30.23 0.0
25 18:35 E 5 5.00 Fog/Mist CLR 50 50 100% 49 30.22 0.0
25 18:15 Calm 5.00 Fog/Mist CLR 50 50 100% 30.23 0.0
25 17:55 Calm 5.00 Fog/Mist FEW004 SCT110 51.8 51.8 100% 30.23 0.0
25 17:35 S 3 4.00 Fog/Mist SCT004 OVC110 51.8 50 94% 30.21 0.0
25 17:15 Calm 4.00 Fog/Mist BKN110 51.8 50 94% 30.23 0.0
25 16:55 SE 6 5.00 Fog/Mist FEW120 51.8 50 94% 30.2 0.0
25 16:35 Calm 5.00 Fog/Mist CLR 51.8 50 94% 30.22 0.0
25 16:15 Calm 6.00 Fog/Mist FEW120 51.8 50 94% 30.22 0.0
25 15:55 Calm 5.00 Fog/Mist FEW014 51.8 50 94% 30.21 0.0
25 15:35 Calm 6.00 Fog/Mist CLR 53.6 50 88% 30.22 0.0
25 15:15 NW 6 5.00 Fog/Mist SCT100 53.6 50 88% 30.22 0.0
25 14:55 N 6 6.00 Fog/Mist SCT100 53.6 50 88% 30.22 0.0
25 14:35 Calm 6.00 Fog/Mist CLR 51.8 50 94% 30.2 0.0
25 14:15 NW 6 5.00 Fog/Mist CLR 51.8 48.2 88% 30.2 0.0
25 13:55 NW 7 6.00 Fog/Mist FEW095 51.8 48.2 88% 30.21 0.0
25 13:35 NW 9 7.00 Partly Cloudy SCT095 53.6 48.2 82% 30.21 0.0
25 13:15 Calm 6.00 Fair with Haze CLR 53.6 48.2 82% 30.2 0.0
25 12:55 NW 9 6.00 Fair with Haze CLR 53.6 48.2 82% 30.21 0.0
25 12:35 NW 9 6.00 Fair with Haze CLR 53.6 48.2 82% 30.22 0.0
25 12:15 NW 9 5.00 Fair with Haze CLR 55.4 50 82% 30.22 0.0
25 11:55 N 3 5.00 Fair with Haze CLR 53.6 48.2 82% 30.22 0.0
25 11:35 NW 6 5.00 Fair with Haze CLR 53.6 48.2 82% 30.23 0.0
25 11:15 N 7 6.00 Fair with Haze CLR 53.6 48.2 82% 30.24 0.0
25 10:55 N 5 6.00 Fair with Haze CLR 53.6 48.2 82% 30.25 0.0
25 10:35 Calm 3.00 Fog/Mist CLR 51.8 48.2 88% 30.26 0.0
25 10:15 Calm 3.00 Fog/Mist CLR 50 48.2 94% 30.26 0.0
25 09:55 Calm 4.00 Fog/Mist CLR 48.2 48.2 100% 30.25 0.0
25 09:35 Calm 3.00 Fog/Mist CLR 48.2 48.2 100% 30.26 0.0
25 09:15 Calm 7.00 Fair CLR 46.4 46.4 100% 30.25 0.0
25 08:55 Calm 7.00 Fair CLR 44.6 44.6 100% 30.25 0.0
25 08:15 Calm 8.00 Fair CLR 42.8 42.8 100% 30.24 0.0
25 07:55 Calm 7.00 Fair CLR 42.8 42.8 100% 30.24 0.0
25 07:35 Calm 7.00 Fair CLR 42.8 42.8 100% 30.24 0.0
25 07:15 Calm 7.00 Fair CLR 42.8 42.8 100% 30.22 0.0
25 06:55 Calm 9.00 Fair CLR 42.8 42.8 100% 30.23 0.0
25 06:35 Calm 9.00 Fair CLR 42.8 42.8 100% 30.23 0.0
25 06:15 Calm 9.00 Fair CLR 42.8 42.8 100% 30.22 0.0
25 05:55 Calm 8.00 A Few Clouds FEW004 42.8 42.8 100% 30.23 0.0
25 05:35 Calm 9.00 Fair CLR 44.6 44.6 100% 30.23 0.0
25 05:15 Calm 8.00 Fair CLR 42.8 42.8 100% 30.22 0.0
25 04:55 Calm 8.00 Fair CLR 44.6 44.6 100% 30.22 0.0
25 04:35 Calm 9.00 Fair CLR 44.6 44.6 100% 30.2 0.0
25 04:15 Calm 8.00 Fair CLR 46.4 46.4 100% 30.2 0.0
25 03:55 Calm 7.00 Fair CLR 48.2 48.2 100% 30.2 0.0
25 03:35 N 8 6.00 Fog/Mist CLR 50 48.2 94% 47 30.22 0.0
25 03:15 N 12 G 18 6.00 Fog/Mist FEW018 50 48.2 94% 46 30.23 0.0
25 02:55 N 12 6.00 Fog/Mist CLR 50 48.2 94% 46 30.24 0.0
25 02:35 N 8 6.00 Fog/Mist FEW003 SCT020 50 48.2 94% 47 30.25 0.0
25 02:15 N 8 6.00 Fog/Mist BKN021 50 48.2 94% 47 30.25 0.0
25 01:55 N 9 7.00 Mostly Cloudy BKN021 50 48.2 94% 47 30.24 0.0
25 01:35 N 9 8.00 A Few Clouds FEW020 51.8 48.2 88% 30.23 0.0
25 01:15 N 7 6.00 Fog/Mist SCT018 46.4 46.4 100% 43 30.23 0.0
25 00:55 Calm 5.00 Fog/Mist BKN018 46.4 46.4 100% 30.21 0.0
25 00:35 NE 6 6.00 Fog/Mist SCT017 48.2 48.2 100% 46 30.2 0.0
25 00:15 S 5 4.00 Fog/Mist FEW017 48.2 48.2 100% 47 30.18 0.0
24 23:55 Calm 6.00 Fog/Mist FEW017 50 48.2 94% 30.18 0.0
24 23:35 N 9 G 15 7.00 A Few Clouds FEW016 51.8 50 94% 30.18 0.0
24 23:15 N 12 7.00 Fair CLR 51.8 50 94% 30.2 0.0
24 22:55 N 14 6.00 Fog/Mist CLR 50 50 100% 45 30.2 0.0
24 22:35 N 7 6.00 Fog/Mist FEW018 50 48.2 94% 48 30.2 0.0
24 22:15 N 7 6.00 Fog/Mist SCT017 SCT030 51.8 50 94% 30.19 0.0
24 21:55 N 6 7.00 A Few Clouds FEW016 51.8 50 94% 30.2 0.0
24 21:35 NW 10 6.00 Fog/Mist SCT017 51.8 50 94% 30.19 0.0
24 21:15 N 6 G 12 7.00 Partly Cloudy SCT018 SCT027 51.8 50 94% 30.2 0.0
24 20:55 N 8 G 15 7.00 Fair CLR 51.8 50 94% 30.21 0.0
24 20:35 NW 14 7.00 Fair CLR 51.8 50 94% 30.2 0.0
24 20:15 N 12 7.00 Partly Cloudy SCT021 SCT029 SCT034 51.8 50 94% 30.21 0.0
24 19:55 N 12 6.00 Fog/Mist SCT019 SCT023 BKN031 51.8 50 94% 30.21 0.0
24 19:35 N 12 6.00 Fog/Mist SCT020 BKN026 BKN032 53.6 51.8 94% 30.2 0.0
24 19:15 N 12 G 17 8.00 Mostly Cloudy BKN020 BKN026 BKN032 53.6 50 88% 30.2 0.0
24 18:55 N 10 6.00 Fog/Mist BKN021 BKN040 53.6 51.8 94% 30.2 0.0 0.01
24 18:35 NW 12 6.00 Fog/Mist FEW023 FEW040 53.6 51.8 94% 30.21 0.0
24 18:15 NW 13 6.00 Fog/Mist FEW003 FEW043 53.6 51.8 94% 30.2 0.0
24 17:55 NW 12 5.00 Fog/Mist CLR 53.6 51.8 94% 30.19 0.0
24 17:35 NW 13 7.00 Fair CLR 53.6 51.8 94% 30.18 0.0
24 17:15 NW 13 3.00 Fog/Mist FEW003 53.6 51.8 94% 30.18 0.0
24 16:55 NW 9 3.00 Fog/Mist CLR 53.6 51.8 94% 30.17 0.0 0.01
24 16:35 NW 6 4.00 Fog/Mist CLR 53.6 50 88% 30.15 0.0
24 16:15 NW 6 5.00 Fair with Haze CLR 55.4 50 82% 30.13 0.0
24 15:55 NW 7 6.00 Fair with Haze CLR 55.4 50 82% 30.13 0.0
24 15:35 NW 8 7.00 Fair CLR 55.4 50 82% 30.12 0.0
24 15:15 NW 5 6.00 Fair with Haze CLR 57.2 50 77% 30.11 0.0
24 14:55 N 6 G 12 8.00 A Few Clouds FEW055 FEW080 57.2 50 77% 30.13 0.0 0.01
24 14:35 NW 14 6.00 Mostly Cloudy with Haze SCT060 SCT080 BKN100 55.4 51.8 88% 30.14 0.0
24 14:15 N 13 G 18 6.00 Mostly Cloudy with Haze FEW016 SCT021 BKN044 55.4 51.8 88% 30.15 0.0
24 13:55 NW 10 3.00 Fog/Mist FEW019 FEW025 SCT031 57.2 55.4 94% 30.14 0.0 0.01
24 13:35 NW 8 3.00 Fog/Mist CLR 57.2 55.4 94% 30.14 0.0
24 13:15 NW 9 3.00 Fog/Mist CLR 57.2 57.2 100% 30.14 0.0
24 12:55 W 9 3.00 Fog/Mist SCT015 57.2 55.4 94% 30.15 0.0 0.02
24 12:35 W 12 2.50 Fog/Mist BKN016 BKN024 57.2 55.4 94% 30.16 0.0
24 12:15 W 10 3.00 Fog/Mist OVC014 55.4 55.4 100% 30.16 0.0
24 11:55 Vrbl 6 4.00 Fog/Mist BKN014 OVC020 55.4 55.4 100% 30.16 0.0 0.02
24 11:35 SW 6 1.25 Light Rain Fog/Mist BKN015 OVC019 53.6 53.6 100% 30.16 0.0
24 11:15 SW 7 5.00 Fog/Mist BKN017 BKN022 OVC026 53.6 53.6 100% 30.17 0.0
24 10:55 SW 10 5.00 Fog/Mist FEW012 SCT021 BKN027 53.6 53.6 100% 30.17 0.0 0.02
24 10:35 SW 9 G 16 1.50 Fog/Mist SCT008 BKN013 BKN023 53.6 53.6 100% 30.17 0.0
24 10:15 Calm 0.50 Light Rain Fog BKN006 SCT009 OVC015 51.8 51.8 100% 30.17 0.0
24 09:55 Vrbl 3 1.25 Fog/Mist SCT005 SCT009 BKN015 51.8 51.8 100% 30.15 0.0 0.01
24 09:35 S 6 0.25 Fog BKN004 BKN016 BKN021 51.8 51.8 100% 30.14 0.0
24 09:15 S 10 1.25 Fog/Mist SCT008 BKN022 OVC026 51.8 51.8 100% 30.15 0.0
24 08:55 S 10 1.25 Fog/Mist SCT008 BKN026 OVC031 53.6 53.6 100% 30.14 0.0 0.03
24 08:35 S 7 1.50 Fog/Mist FEW002 SCT024 BKN031 53.6 53.6 100% 30.13 0.0
24 08:15 S 5 2.50 Fog/Mist FEW041 BKN060 51.8 51.8 100% 30.1 0.0
24 07:55 S 7 1.75 Light Rain Fog/Mist SCT006 BKN034 OVC055 51.8 51.8 100% 30.11 0.0 0.03
24 07:35 S 3 2.00 Light Rain Fog/Mist SCT007 SCT034 OVC060 51.8 51.8 100% 30.12 0.0
24 07:15 SE 6 2.50 Light Rain Fog/Mist SCT006 BKN010 OVC055 51.8 51.8 100% 30.08 0.0
24 06:55 S 8 2.00 Light Rain Fog/Mist BKN009 BKN033 OVC049 53.6 53.6 100% 30.11 0.0 0.04
24 06:35 S 5 2.50 Light Rain Fog/Mist SCT010 BKN028 OVC060 53.6 53.6 100% 30.1 0.0
24 06:15 Calm 2.50 Light Rain Fog/Mist FEW011 BKN029 OVC065 53.6 53.6 100% 30.07 0.0
24 05:55 W 6 2.00 Light Rain Fog/Mist FEW008 BKN013 OVC060 53.6 53.6 100% 30.09 0.0 0.03
24 05:35 Calm 2.00 Light Rain Fog/Mist SCT007 BKN013 OVC030 53.6 53.6 100% 30.1 0.0
24 05:15 NW 5 G 13 2.00 Unknown Precip Fog/Mist FEW009 BKN019 OVC029 53.6 53.6 100% 30.1 0.0
24 04:55 W 3 1.50 Light Rain Fog/Mist SCT010 BKN028 OVC032 53.6 53.6 100% 30.11 0.0 0.03
24 04:35 Calm 2.00 Fog/Mist FEW005 SCT008 BKN029 53.6 53.6 100% 30.1 0.0
24 04:15 Calm 3.00 Fog/Mist SCT008 BKN011 OVC060 53.6 53.6 100% 30.07 0.0
24 03:55 N 12 5.00 Fog/Mist SCT007 BKN020 OVC060 53.6 53.6 100% 30.06 0.0 0.01
24 03:35 N 9 G 16 3.00 Fog/Mist FEW009 SCT018 BKN023 53.6 53.6 100% 30.08 0.0
24 03:15 N 13 1.00 Fog/Mist BKN008 BKN011 OVC023 53.6 53.6 100% 30.09 0.0
24 02:55 N 15 1.50 Light Rain Fog/Mist SCT011 OVC021 53.6 53.6 100% 30.08 0.0 0.18
24 02:35 N 15 4.00 Fog/Mist SCT004 SCT007 OVC026 53.6 53.6 100% 30.07 0.0
24 02:15 W 17 G 25 0.75 Heavy Rain Fog/Mist OVC003 55.4 55.4 100% 30.06 0.0
24 01:55 S 13 1.00 Fog/Mist OVC002 57.2 57.2 100% 30.02 0.0 0.08
24 01:35 S 15 G 21 1.00 Fog/Mist OVC002 57.2 57.2 100% 30.02 0.0
24 00:55 S 14 G 20 0.25 Fog OVC002 57.2 57.2 100% 30.03 0.0
24 00:35 S 14 0.25 Fog OVC002 59 59 100% 30.05 0.0
24 00:15 S 9 1.50 Fog/Mist OVC003 57.2 57.2 100% 30.06 0.0
23 23:55 SE 9 1.25 Fog/Mist OVC003 57.2 57.2 100% 30.06 0.0
23 23:35 SE 8 1.25 Fog/Mist OVC003 57.2 57.2 100% 30.07 0.0
23 23:15 SE 9 G 15 1.50 Fog/Mist OVC002 57.2 57.2 100% 30.07 0.0
23 22:55 S 14 3.00 Fog/Mist OVC004 57.2 57.2 100% 30.08 0.0
23 22:35 S 14 2.00 Fog/Mist OVC002 57.2 57.2 100% 30.08 0.0
23 22:15 SE 7 0.50 Fog/Mist OVC002 57.2 57.2 100% 30.08 0.0
23 21:55 SE 8 0.50 Fog/Mist OVC002 57.2 57.2 100% 30.08 0.0
23 21:35 SE 8 G 16 1.25 Fog/Mist BKN003 OVC013 57.2 57.2 100% 30.09 0.0
23 21:15 S 16 1.75 Fog/Mist OVC003 59 59 100% 30.09 0.0
23 20:55 S 8 1.00 Fog/Mist OVC003 59 59 100% 30.09 0.0
23 20:35 SE 7 1.00 Fog/Mist OVC003 59 59 100% 30.1 0.0
23 20:15 SE 10 1.75 Fog/Mist OVC004 59 59 100% 30.09 0.0
23 19:55 SE 9 1.75 Fog/Mist OVC004 59 59 100% 30.1 0.0
23 19:35 S 7 1.25 Fog/Mist OVC003 59 59 100% 30.11 0.0
23 19:15 SE 13 1.25 Fog/Mist OVC003 59 59 100% 30.11 0.0
23 18:55 SE 13 1.75 Fog/Mist OVC003 59 59 100% 30.12 0.0
23 18:35 S 10 1.75 Fog/Mist OVC003 59 59 100% 30.12 0.0
23 18:15 SE 7 3.00 Fog/Mist OVC003 59 59 100% 30.12 0.0
23 17:55 SE 8 2.00 Fog/Mist OVC004 59 59 100% 30.12 0.0
23 17:35 S 6 1.00 Fog/Mist BKN006 BKN010 OVC023 59 59 100% 30.12 0.0
23 17:15 S 6 1.75 Fog/Mist SCT007 BKN022 OVC030 59 59 100% 30.13 0.0
23 16:55 SE 9 1.75 Fog/Mist SCT005 BKN022 OVC033 59 59 100% 30.12 0.0
23 16:35 SE 7 2.00 Fog/Mist SCT005 OVC023 59 59 100% 30.12 0.0
23 16:15 SE 7 1.75 Fog/Mist BKN005 OVC024 59 59 100% 30.12 0.0
23 15:55 S 8 G 15 2.50 Fog/Mist BKN005 OVC024 59 59 100% 30.13 0.0
23 15:15 SE 7 1.50 Fog/Mist OVC006 59 59 100% 30.14 0.0
23 14:35 SE 7 3.00 Fog/Mist FEW006 OVC019 59 59 100% 30.13 0.0
23 14:15 SE 9 3.00 Fog/Mist BKN006 OVC018 59 59 100% 30.14 0.0
23 13:55 SE 8 2.00 Fog/Mist BKN006 BKN015 59 59 100% 30.14 0.0
23 13:35 SE 7 1.25 Fog/Mist SCT007 OVC014 59 59 100% 30.15 0.0
23 13:15 S 6 0.50 Fog SCT004 OVC013 59 59 100% 30.15 0.0
23 12:55 S 5 0.50 Fog/Mist BKN011 OVC023 60.8 60.8 100% 30.15 0.0
23 12:35 SW 6 0.25 Fog SCT003 OVC024 60.8 60.8 100% 30.15 0.0
23 12:15 SE 5 0.75 Fog/Mist OVC022 62.6 62.6 100% 30.15 0.0
23 11:55 SE 3 1.00 Fog/Mist OVC020 62.6 62.6 100% 30.17 0.0 0.01
23 11:35 S 3 1.50 Fog/Mist BKN018 BKN025 62.6 62.6 100% 30.18 0.0
23 11:15 SE 7 1.00 Fog/Mist SCT020 62.6 62.6 100% 30.18 0.0
23 10:55 SE 6 0.25 Fog BKN006 62.6 62.6 100% 30.19 0.0
23 10:35 S 3 0.25 Fog BKN003 60.8 60.8 100% 30.19 0.0
23 10:15 SE 6 0.25 Fog OVC003 59 59 100% 30.19 0.0
23 09:55 SE 9 0.25 Fog OVC003 59 59 100% 30.2 0.0 0.02
Date Time (pst) Wind (mph) Vis. (mi.) Weather Sky Cond. Air Dwpt Max. Min. Relative Humidity Wind Chill (°F) Heat Index (°F) altimeter (in) sea level (mb) 1 hr 3 hr 6 hr
6 hour
Temperature (ºF) Pressure Precipitation (in)