National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Weather observations for the past three days for
Aurora, Aurora Municipal Airport
Imperial (Metric)
Date Time (cdt) 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.
27 09:35 Calm 0.50 Fog OVC002 65.1 63.9 96% 30.08 0.0
27 09:15 N 3 0.50 Fog OVC002 64.6 63.5 96% 30.08 0.0
27 08:55 Calm 0.50 Fog OVC002 64.4 63.1 96% 30.07 0.0
27 08:35 Calm 0.25 Fog OVC002 64.4 63.3 96% 30.06 0.0
27 08:15 E 3 0.25 Fog OVC002 64 63 96% 30.05 0.0
27 07:55 E 5 0.25 Fog OVC002 63.9 62.8 96% 30.04 0.0
27 07:35 SE 3 0.25 Fog OVC002 64 63 96% 30.03 0.0
27 07:15 SE 3 0.25 Fog OVC002 64 63 96% 30.02 0.0
27 06:55 SE 3 0.25 Fog OVC002 64 63 65.7 62.1 96% 30.02 0.0
27 06:35 E 5 0.25 Fog OVC002 64 62.8 96% 30.02 0.0
27 06:15 Calm 0.25 Fog OVC002 63.9 62.8 96% 30.02 0.0
27 05:55 Calm 0.25 Fog OVC002 63.7 62.6 96% 30.01 0.0
27 05:35 E 3 0.25 Fog OVC002 63.5 62.6 97% 30 0.0
27 05:15 E 5 0.25 Fog OVC002 63.5 62.6 97% 29.99 0.0
27 04:55 SE 5 0.25 Fog OVC002 63.5 62.2 96% 29.99 0.0
27 04:35 SE 5 0.25 Fog OVC002 63 61.9 96% 29.99 0.0
27 04:15 SE 3 0.50 Fog OVC002 62.8 61.7 96% 29.99 0.0
27 03:55 E 3 2.00 Fog/Mist OVC002 62.4 61.3 96% 29.99 0.0
27 03:35 SE 3 3.00 Fog/Mist SCT002 62.2 61.2 96% 29.99 0.0
27 03:15 SE 5 3.00 Fog/Mist CLR 62.4 61.2 96% 29.99 0.0
27 02:55 SE 3 4.00 Fog/Mist CLR 62.6 61.7 97% 29.99 0.0
27 02:35 SE 3 5.00 Fog/Mist CLR 63.5 62.4 96% 29.99 0.0
27 02:15 SE 5 7.00 Fair CLR 63.9 62.8 96% 29.99 0.0
27 01:55 SE 5 7.00 Fair CLR 64.4 63 95% 29.99 0.0
27 01:35 SE 5 10.00 Fair CLR 64.8 63.7 96% 29.99 0.0
27 01:15 SE 6 10.00 Fair CLR 65.3 64.2 96% 29.99 0.0
27 00:55 SE 6 10.00 Fair CLR 65.8 64.6 76.1 65.8 96% 29.99 0.0
27 00:35 SE 7 10.00 Fair CLR 66.2 65.1 96% 29.99 0.0
27 00:15 SE 7 10.00 Fair CLR 66.4 65.3 96% 29.98 0.0
26 23:55 SE 7 10.00 Fair CLR 66.6 65.5 96% 29.98 0.0
26 23:35 SE 7 10.00 Fair CLR 66.7 65.5 96% 29.98 0.0
26 23:15 SE 7 10.00 Fair CLR 66.9 65.7 96% 29.98 0.0
26 22:55 SE 7 10.00 Partly Cloudy SCT033 SCT050 67.3 66.2 96% 29.98 0.0
26 22:35 SE 8 10.00 Mostly Cloudy BKN050 68.2 66.6 95% 29.97 0.0
26 22:15 SE 8 10.00 Partly Cloudy SCT050 68.4 66.6 94% 29.97 0.0
26 21:55 SE 7 10.00 Mostly Cloudy BKN050 68.9 66.6 92% 29.96 0.0
26 21:35 SE 7 10.00 Overcast OVC050 69.8 66.7 90% 29.96 0.0
26 21:15 SE 7 10.00 Mostly Cloudy BKN050 70 66.6 89% 29.96 0.0
26 20:55 SE 8 10.00 Overcast OVC050 70.9 66.7 87% 29.95 0.0
26 20:35 SE 8 10.00 Overcast OVC050 71.8 66.2 83% 29.94 0.0
26 20:15 SE 7 10.00 Overcast OVC050 72.5 66 80% 29.93 0.0
26 19:55 S 3 10.00 Mostly Cloudy BKN050 72 65.7 81% 29.92 0.0
26 19:35 SE 3 10.00 Overcast OVC050 72.5 65.5 79% 29.92 0.0
26 19:15 S 5 10.00 Mostly Cloudy BKN050 74.7 65.3 73% 29.91 0.0
26 18:55 SE 6 10.00 Overcast OVC050 76.3 66.2 78.6 74.3 71% 78 29.91 0.0
26 18:35 S 6 10.00 Overcast OVC050 77.7 65.7 67% 80 29.91 0.0
26 18:15 SE 9 10.00 Overcast OVC050 77 66 69% 79 29.9 0.0
26 17:55 S 8 10.00 Overcast SCT034 OVC050 78.4 65.5 65% 80 29.9 0.0
26 17:35 S 8 10.00 Overcast OVC048 77.9 65.7 66% 80 29.9 0.0
26 17:15 S 8 10.00 Overcast OVC044 77.4 66.2 69% 79 29.9 0.0
26 16:55 S 7 10.00 Overcast SCT036 OVC042 77.2 66.2 69% 79 29.9 0.0
26 16:35 S 8 10.00 Overcast SCT030 OVC037 77 66 69% 79 29.91 0.0
26 16:15 S 8 10.00 Overcast BKN028 OVC037 77 66.6 70% 79 29.9 0.0
26 15:55 S 8 10.00 Overcast BKN026 OVC035 76.6 66 70% 78 29.91 0.0
26 15:35 S 9 10.00 Overcast BKN026 OVC031 76.6 66.2 70% 78 29.91 0.0
26 15:15 S 9 10.00 Mostly Cloudy BKN027 76.1 65.7 70% 78 29.92 0.0
26 14:55 S 12 10.00 Mostly Cloudy BKN023 76.1 65.7 70% 78 29.92 0.0
26 14:35 S 13 G 18 10.00 Mostly Cloudy BKN023 BKN027 76.1 66.2 72% 78 29.92 0.0
26 14:15 SE 13 G 17 10.00 Mostly Cloudy BKN023 BKN030 75.4 66.2 73% 77 29.93 0.0
26 13:55 S 14 G 17 10.00 Overcast BKN023 OVC029 75.4 66.4 74% 77 29.93 0.0
26 13:35 S 9 10.00 Mostly Cloudy SCT023 BKN029 75.4 65.8 72% 77 29.94 0.0
26 13:15 S 10 10.00 Partly Cloudy SCT018 75.6 66.2 73% 77 29.94 0.0
26 12:55 S 9 10.00 Partly Cloudy SCT016 74.1 66.2 74.1 62.6 76% 29.94 0.0
26 12:35 S 8 10.00 Partly Cloudy SCT014 72.7 65.8 79% 29.95 0.0
26 12:15 S 10 10.00 Mostly Cloudy BKN012 71.6 66 83% 29.95 0.0
26 11:55 S 9 G 17 10.00 Overcast OVC012 69.8 65.3 86% 29.96 0.0
26 11:35 S 10 10.00 Overcast OVC010 69.8 65.7 87% 29.96 0.0
26 11:15 S 8 10.00 Overcast OVC010 68.5 65.3 89% 29.97 0.0
26 10:55 S 10 10.00 Overcast OVC010 67.8 64.8 90% 29.97 0.0
26 10:35 S 9 10.00 Overcast OVC006 66.6 64 92% 29.97 0.0
26 10:15 S 10 10.00 Overcast OVC006 65.7 63.5 93% 29.97 0.0
26 09:55 S 14 10.00 Overcast OVC004 64.6 63.5 96% 29.97 0.0
26 09:35 SE 8 10.00 Overcast OVC004 63.9 62.8 96% 29.97 0.0
26 09:15 S 10 7.00 Overcast OVC004 63.1 62.1 96% 29.97 0.0
26 08:55 SE 9 7.00 Overcast OVC004 63 61.9 96% 29.98 0.0
26 08:35 SE 13 7.00 Overcast OVC004 62.8 61.7 96% 29.98 0.0
26 08:15 SE 9 7.00 Overcast OVC004 62.6 61.7 97% 29.98 0.0
26 07:55 S 9 7.00 Overcast OVC004 62.6 61.3 96% 29.98 0.0
26 07:35 SE 9 7.00 Overcast OVC004 62.6 61.7 97% 29.98 0.0
26 07:15 SE 12 7.00 Overcast OVC004 62.8 61.7 96% 29.97 0.0
26 06:55 SE 9 10.00 Overcast OVC004 63 61.9 65.5 63 96% 29.97 0.0 0.11
26 06:35 SE 7 10.00 Overcast OVC006 63.5 62.2 96% 29.96 0.0
26 06:15 S 9 10.00 Overcast OVC006 63.7 62.6 96% 29.97 0.0
26 05:55 S 13 G 16 10.00 Overcast OVC006 63.9 62.8 96% 29.97 0.0
26 05:35 S 8 10.00 Overcast OVC006 64 63 96% 29.96 0.0
26 05:15 S 10 10.00 Overcast OVC006 64 63 96% 29.96 0.0
26 04:55 S 9 G 17 10.00 Overcast OVC006 64.4 63.1 96% 29.95 0.0
26 04:35 S 12 G 20 10.00 Overcast OVC006 64.4 63.3 96% 29.96 0.0
26 04:15 S 12 G 18 10.00 Overcast OVC006 64.6 63.5 96% 29.96 0.0
26 03:55 S 12 G 20 10.00 Overcast OVC006 64.6 63.5 96% 29.96 0.0 0.11
26 03:35 S 13 G 18 10.00 Overcast OVC006 64.8 63.7 96% 29.97 0.0
26 03:15 S 12 G 18 10.00 Overcast OVC006 64.9 63.9 96% 29.97 0.0
26 02:55 S 10 10.00 Overcast OVC006 65.3 64.2 96% 29.98 0.0 0.02
26 02:35 S 14 G 17 10.00 Overcast OVC006 65.3 64.2 96% 29.98 0.0 0.02
26 02:15 S 12 10.00 Light Rain OVC006 65.3 64 96% 29.99 0.0 0.02
26 01:55 S 12 7.00 Rain OVC006 65.5 64.4 96% 30 0.0 0.08
26 01:35 S 15 G 21 10.00 Light Rain OVC004 65.5 64.4 96% 30 0.0 0.04
26 01:15 S 10 10.00 Rain OVC004 65.3 64.2 96% 30.01 0.0 0.02
26 00:55 SE 10 7.00 Rain OVC004 65.3 64 65.3 64 96% 30.01 0.0 0.05 0.1
26 00:35 S 9 10.00 Light Rain OVC004 65.1 63.9 96% 30.02 0.0 0.01
26 00:15 SE 10 10.00 Thunderstorm Light Drizzle in Vicinity OVC004 64.8 63.7 96% 30.02 0.0
25 23:55 SE 10 G 17 10.00 Overcast OVC004 64.6 63.5 96% 30.04 0.0
25 23:35 SE 10 5.00 Thunderstorm Light Drizzle in Vicinity OVC002 64.4 63.5 97% 30.04 0.0
25 23:15 SE 13 5.00 Fog/Mist OVC002 64.4 63.1 96% 30.04 0.0
25 22:55 SE 13 7.00 Overcast OVC002 64.4 63.3 96% 30.03 0.0 0.02
25 22:35 SE 10 7.00 Thunderstorm Light Rain in Vicinity OVC002 64.4 63.1 96% 30.03 0.0 0.01
25 22:15 SE 9 5.00 Drizzle OVC002 64.4 63.3 96% 30.04 0.0 0.01
25 21:55 SE 9 5.00 Light Rain OVC002 64.4 63.3 96% 30.05 0.0 0.03 0.03
25 21:35 SE 10 G 18 2.50 Light Rain OVC002 64.4 63.1 96% 30.04 0.0 0.02
25 21:15 SE 15 2.50 Drizzle OVC002 64.4 63.3 96% 30.05 0.0
25 20:55 SE 13 3.00 Fog/Mist OVC002 64.4 63.3 96% 30.03 0.0
25 20:35 SE 13 G 17 2.50 Fog/Mist OVC002 64.4 63.3 96% 30.03 0.0
25 20:15 SE 9 1.00 Fog/Mist OVC002 64.4 63.1 96% 30.04 0.0
25 19:55 SE 8 1.00 Fog/Mist OVC002 64.2 63 96% 30.04 0.0
25 19:35 SE 10 1.00 Fog/Mist OVC002 64 63 96% 30.05 0.0
25 19:15 SE 8 1.00 Fog/Mist OVC002 64 63 96% 30.05 0.0
25 18:55 SE 9 0.75 Fog/Mist OVC002 64.2 63 64.4 62.2 96% 30.05 0.0
25 18:35 SE 9 1.25 Fog/Mist OVC002 64.4 63 95% 30.05 0.0
25 18:15 SE 9 3.00 Fog/Mist OVC002 64.4 63.1 96% 30.05 0.0
25 17:55 SE 6 2.50 Fog/Mist OVC002 64.4 63.1 96% 30.05 0.0
25 17:35 SE 9 1.50 Fog/Mist OVC002 64.4 63.3 96% 30.06 0.0
25 17:15 SE 8 1.00 Fog/Mist OVC002 64.4 63.3 96% 30.07 0.0
25 16:55 SE 7 0.50 Fog OVC002 64 63 96% 30.07 0.0
25 16:35 SE 8 1.50 Fog/Mist OVC002 64.2 63.1 96% 30.07 0.0
25 16:15 SE 8 4.00 Fog/Mist OVC004 64.2 63 96% 30.08 0.0
25 15:55 SE 10 5.00 Fog/Mist OVC004 64 63 96% 30.08 0.0
25 15:35 SE 9 2.50 Fog/Mist OVC004 64 62.8 96% 30.08 0.0
25 15:15 SE 9 2.00 Fog/Mist OVC004 63.9 62.8 96% 30.09 0.0
25 14:55 SE 10 1.75 Fog/Mist OVC004 63.5 62.6 97% 30.09 0.0
25 14:35 SE 8 1.75 Fog/Mist OVC004 63.1 62.1 96% 30.1 0.0
25 14:15 SE 10 3.00 Fog/Mist OVC004 63.1 62.1 96% 30.1 0.0
25 13:55 SE 10 5.00 Fog/Mist OVC004 63.1 62.1 96% 30.11 0.0
25 13:35 SE 10 3.00 Fog/Mist OVC004 63.1 62.1 96% 30.11 0.0
25 13:15 SE 13 2.50 Fog/Mist OVC004 62.4 61.3 96% 30.12 0.0
25 12:55 SE 12 1.50 Fog/Mist OVC004 62.1 61 62.1 60.8 96% 30.12 0.0 0.02
25 12:35 SE 8 1.50 Fog/Mist OVC004 61.7 60.6 96% 30.13 0.0
25 12:15 SE 14 1.75 Fog/Mist OVC004 61.2 60.1 96% 30.13 0.0
25 11:55 SE 12 G 17 1.75 Fog/Mist OVC004 61.7 60.4 96% 30.13 0.0
25 11:35 SE 13 1.75 Fog/Mist OVC004 61.3 60.3 96% 30.13 0.0
25 11:15 SE 13 2.00 Fog/Mist OVC004 61.2 60.1 96% 30.13 0.0
25 10:55 SE 13 G 18 2.00 Fog/Mist OVC004 61 59.9 96% 30.13 0.0
25 10:35 SE 8 1.75 Fog/Mist OVC004 61 59.9 96% 30.13 0.0
25 10:15 SE 10 1.75 Fog/Mist OVC004 60.8 59.9 97% 30.13 0.0
25 09:55 SE 8 1.50 Fog/Mist OVC004 60.8 59.7 96% 30.14 0.0 0.01 0.02
25 09:35 SE 10 1.25 Fog/Mist OVC004 60.8 59.7 96% 30.13 0.0 0.01
25 09:15 SE 10 1.00 Fog/Mist OVC004 60.8 59.7 96% 30.15 0.0 0.01
25 08:55 SE 9 1.00 Fog/Mist OVC004 60.8 59.9 97% 30.14 0.0
25 08:35 SE 12 1.25 Fog/Mist OVC004 60.8 59.7 96% 30.14 0.0
25 08:15 SE 8 1.50 Fog/Mist OVC004 61 59.9 96% 30.14 0.0
25 07:55 E 10 2.00 Fog/Mist OVC004 61 59.9 96% 30.14 0.0 0.01
25 07:35 SE 8 4.00 Fog/Mist OVC004 61 59.9 96% 30.15 0.0
25 07:15 SE 8 5.00 Fog/Mist OVC004 61.3 60.3 96% 30.13 0.0
25 06:55 SE 7 5.00 Light Drizzle OVC003 61.5 60.3 61.7 60.8 96% 30.13 0.0 0.13 1.13
25 06:35 SE 6 4.00 Rain OVC003 61.3 60.3 96% 30.13 0.0 0.13
25 06:15 SE 9 5.00 Light Rain OVC003 61.3 60.3 96% 30.13 0.0 0.07
25 05:55 E 8 7.00 Light Rain BKN005 BKN008 OVC012 61.5 60.4 96% 30.13 0.0 0.09
25 05:35 SE 10 7.00 Drizzle OVC003 61.3 60.3 96% 30.12 0.0 0.05
25 05:15 SE 12 7.00 Light Rain OVC003 61.3 60.3 96% 30.12 0.0 0.03
25 04:55 E 12 G 16 7.00 Light Rain OVC003 61.2 60.1 96% 30.12 0.0 0.12
25 04:35 E 12 5.00 Rain OVC003 61.3 60.3 96% 30.13 0.0 0.09
25 04:15 E 8 5.00 Rain SCT003 OVC029 61.2 60.1 96% 30.13 0.0 0.04
25 03:55 E 13 4.00 Rain SCT005 SCT008 OVC029 61.2 60.1 96% 30.13 0.0 0.47 0.78
25 03:35 E 10 3.00 Heavy Rain OVC007 61.3 60.3 96% 30.15 0.0 0.19
25 03:15 E 7 5.00 Rain BKN007 OVC011 61.3 60.3 96% 30.15 0.0 0.01
25 02:55 E 6 7.00 Overcast SCT004 OVC011 61.2 60.1 96% 30.16 0.0
25 02:35 E 6 7.00 Overcast BKN004 OVC008 61 59.9 96% 30.16 0.0
25 02:15 E 8 7.00 Overcast OVC004 61 59.9 96% 30.17 0.0
25 01:55 E 7 7.00 Overcast BKN004 OVC008 60.8 59.9 97% 30.17 0.0 0.31
25 01:35 E 7 3.00 Heavy Rain BKN004 BKN009 OVC013 60.8 59.9 97% 30.18 0.0 0.29
25 01:15 E 6 3.00 Heavy Rain BKN004 BKN010 OVC013 61 59.9 96% 30.18 0.0 0.1
25 00:55 E 5 5.00 Light Rain OVC004 61 59.9 61.3 60.8 96% 30.19 0.0 0.08 0.12
25 00:35 E 6 5.00 Light Rain OVC004 61 59.9 96% 30.19 0.0 0.05
25 00:15 E 5 5.00 Rain OVC006 61 59.9 96% 30.2 0.0 0.02
24 23:55 E 5 5.00 Fog/Mist BKN006 OVC010 60.8 59.9 97% 30.2 0.0
24 23:35 E 5 5.00 Fog/Mist OVC010 60.8 59.9 97% 30.2 0.0
24 23:15 E 5 5.00 Fog/Mist OVC010 60.8 59.9 97% 30.2 0.0
24 22:55 E 3 7.00 Light Drizzle OVC008 61 59.9 96% 30.21 0.0 0.02
24 22:35 Calm 7.00 Rain OVC006 61 59.9 96% 30.21 0.0 0.02
24 22:15 SE 3 7.00 Rain OVC006 61 59.9 96% 30.21 0.0 0.01
24 21:55 E 3 7.00 Drizzle OVC008 61 59.9 96% 30.2 0.0 0.01 0.02
24 21:35 SE 5 7.00 Light Drizzle OVC008 61 59.9 96% 30.2 0.0 0.01
24 21:15 E 5 4.00 Drizzle OVC006 60.8 59.9 97% 30.2 0.0
24 20:55 SE 5 4.00 Rain OVC006 60.8 59.9 97% 30.19 0.0 0.01
24 20:35 SE 3 3.00 Rain OVC006 61 59.9 96% 30.19 0.0
24 20:15 SE 5 5.00 Light Rain OVC006 61.2 60.1 96% 30.19 0.0
24 19:55 SE 3 7.00 Overcast OVC006 61.2 60.1 96% 30.19 0.0
24 19:35 SE 5 5.00 Fog/Mist OVC004 61.3 60.3 96% 30.19 0.0
24 19:15 Calm 10.00 Overcast OVC004 61.3 60.3 96% 30.19 0.0
24 18:55 SE 3 10.00 Overcast OVC004 61.2 60.1 61.2 59.4 96% 30.19 0.0 0.01 0.53
24 18:35 SE 5 10.00 Overcast OVC004 61.2 60.1 96% 30.19 0.0
24 18:15 SE 6 10.00 Light Rain OVC004 61 59.9 96% 30.19 0.0
24 17:55 SE 3 10.00 Light Drizzle OVC006 60.8 59.9 97% 30.2 0.0
24 17:35 SE 5 7.00 Overcast OVC006 60.8 59.9 97% 30.2 0.0
24 17:15 SE 5 10.00 Overcast OVC006 60.8 59.9 97% 30.2 0.0
24 16:55 SE 6 10.00 Rain OVC004 60.8 59.9 97% 30.19 0.0 0.08
24 16:35 S 5 10.00 Rain OVC004 60.8 59.5 96% 30.2 0.0 0.08
24 16:15 SE 6 4.00 Heavy Rain OVC004 60.4 59.4 96% 30.2 0.0 0.05
24 15:55 SE 8 4.00 Rain OVC004 60.3 59.2 96% 30.2 0.0 0.16 0.43
24 15:35 SE 8 7.00 Light Rain OVC004 60.1 59 96% 30.19 0.0 0.09
24 15:15 SE 7 5.00 Rain OVC004 60.1 59 96% 30.19 0.0 0.06
24 14:55 S 8 5.00 Rain OVC004 60.1 59 96% 30.2 0.0 0.14
24 14:35 SE 13 3.00 Heavy Rain OVC004 60.1 59 96% 30.2 0.0 0.1
24 14:15 SE 13 7.00 Light Rain OVC004 59.9 59 97% 30.18 0.0 0.02
24 13:55 SE 12 5.00 Light Rain OVC004 59.4 58.3 96% 30.2 0.0 0.12
24 13:35 SE 16 G 21 7.00 Rain OVC004 59.5 58.5 96% 30.21 0.0 0.08
24 13:15 SE 12 5.00 Rain OVC004 59.7 58.6 96% 30.23 0.0 0.03
24 12:55 SE 10 7.00 Rain OVC004 59.5 58.5 60.3 59.4 96% 30.25 0.0 0.21 1.07
24 12:35 SE 9 5.00 Rain OVC004 59.5 58.5 96% 30.25 0.0 0.17
24 12:15 SE 9 3.00 Heavy Rain OVC004 59.4 58.3 96% 30.26 0.0 0.1
24 11:55 SE 9 3.00 Heavy Rain OVC004 59.7 58.6 96% 30.27 0.0 0.29
24 11:15 SE 8 4.00 Heavy Rain BKN004 BKN015 OVC070 59.9 59 97% 30.27 0.0 0.07
24 10:55 SE 8 5.00 Rain BKN004 BKN017 OVC085 60.1 59 96% 30.26 0.0 0.12
24 10:35 SE 8 7.00 Light Rain BKN006 BKN017 OVC075 59.9 59 97% 30.26 0.0 0.06
24 10:15 SE 8 7.00 Rain SCT006 BKN020 OVC075 59.9 58.6 96% 30.25 0.0 0.03
Date Time (cdt) 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)