National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Weather observations for the past three days for
Chesapeake, Chesapeake Municipal Airport
Imperial (Metric)
Date Time (edt) 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.
24 23:35 Calm 10.00 Fair CLR 69.1 67.1 93% 29.92 0.0
24 23:15 Calm 10.00 Fair CLR 69.4 66 89% 29.9 0.0
24 22:55 Calm 10.00 Fair CLR 69.4 66.9 92% 29.9 0.0
24 22:35 Calm 10.00 Fair CLR 70.5 67.8 91% 29.9 0.0
24 22:15 Calm 10.00 Fair CLR 70.5 67.8 91% 29.89 0.0
24 21:55 Calm 10.00 Fair CLR 72.3 66.7 83% 29.88 0.0
24 21:35 Calm 10.00 Fair CLR 77.7 64.4 64% 80 29.87 0.0
24 21:15 N 3 10.00 Fair CLR 78.1 64.4 63% 80 29.86 0.0
24 20:55 Calm 10.00 Fair CLR 77 72.3 86% 78 29.85 0.0
24 20:35 Calm 10.00 Partly Cloudy SCT075 77.7 72.5 84% 80 29.85 0.0
24 20:15 Calm 10.00 Fair CLR 77.5 71.8 83% 79 29.85 0.0
24 19:55 Calm 10.00 Fair CLR 79 72.5 84.9 72.7 81% 82 29.84 0.0
24 19:35 SW 3 10.00 Partly Cloudy SCT060 SCT080 79.7 72.1 78% 83 29.84 0.0
24 19:15 S 6 10.00 Partly Cloudy SCT060 SCT080 81.3 72.9 76% 86 29.82 0.0
24 18:55 S 5 10.00 Fair CLR 84 71.6 66% 89 29.8 0.0
24 18:35 SE 5 10.00 Partly Cloudy SCT085 84.7 68.4 58% 88 29.79 0.0
24 18:15 E 5 10.00 Partly Cloudy SCT085 SCT110 84.9 69.6 60% 89 29.79 0.0
24 17:55 E 5 10.00 Mostly Cloudy BKN110 84.6 70.5 63% 89 29.78 0.0
24 17:35 NE 6 10.00 Partly Cloudy SCT120 84.4 66.7 56% 87 29.78 0.0
24 17:15 E 3 10.00 Mostly Cloudy SCT080 SCT090 BKN110 83.3 70.9 66% 88 29.78 0.0
24 16:55 E 3 10.00 Overcast SCT055 BKN080 OVC090 81 72 74% 85 29.78 0.0
24 16:35 E 5 10.00 Overcast BKN055 BKN090 OVC110 80.4 71.6 75% 84 29.78 0.0
24 16:15 E 3 10.00 Mostly Cloudy SCT075 BKN095 79.7 71.6 76% 83 29.77 0.0
24 15:55 E 3 10.00 Overcast SCT075 OVC085 78.8 72.3 81% 82 29.76 0.0
24 15:35 E 6 10.00 Mostly Cloudy BKN085 79.3 73 81% 83 29.77 0.0
24 15:15 E 6 10.00 Mostly Cloudy BKN085 81 72 74% 85 29.77 0.0
24 14:55 Calm 10.00 Mostly Cloudy BKN085 78.1 70.5 78% 80 29.77 0.0
24 14:35 Calm 10.00 Mostly Cloudy SCT085 BKN120 74.3 70.2 87% 29.77 0.0
24 14:15 Calm 10.00 Thunderstorm SCT085 SCT120 73.6 69.4 87% 29.77 0.0
24 13:55 Calm 10.00 Light Rain SCT065 SCT085 SCT110 72.5 69.6 88.7 71.4 91% 29.77 0.0 0.15 0.15
24 13:35 W 3 7.00 Thunderstorm Rain in Vicinity SCT005 BKN046 BKN060 71.4 68.7 91% 29.78 0.0 0.15
24 13:15 NW 13 G 21 10.00 Overcast SCT030 BKN042 OVC065 77 67.8 73% 79 29.8 0.0
24 12:55 NW 20 G 25 10.00 Mostly Cloudy SCT030 SCT036 BKN090 87.6 71.8 59% 94 29.77 0.0
24 12:35 NW 7 10.00 Mostly Cloudy SCT027 SCT040 BKN090 87.8 72.5 61% 95 29.76 0.0
24 12:15 NW 7 10.00 Mostly Cloudy BKN027 SCT039 BKN048 88.3 72.5 60% 96 29.76 0.0
24 11:55 W 9 10.00 Mostly Cloudy BKN025 BKN030 BKN039 86.2 73.6 66% 94 29.77 0.0
24 11:35 NW 8 10.00 Partly Cloudy SCT023 SCT100 86.4 74.5 68% 95 29.77 0.0
24 11:15 W 8 10.00 Mostly Cloudy SCT018 SCT030 BKN100 84.2 75.6 75% 93 29.77 0.0
24 10:55 W 7 10.00 Overcast BKN018 BKN030 OVC085 82.4 75.9 81% 90 29.76 0.0
24 10:35 W 6 10.00 Mostly Cloudy SCT014 BKN090 83.3 75.9 79% 92 29.75 0.0
24 10:15 SW 6 10.00 Partly Cloudy SCT090 SCT110 82 76.1 82% 89 29.75 0.0
24 09:55 SW 6 10.00 Overcast SCT011 OVC090 80.8 75.6 84% 87 29.75 0.0
24 09:35 SW 5 10.00 Overcast BKN011 OVC100 80.1 75.4 86% 85 29.76 0.0
24 09:15 SW 5 10.00 Overcast BKN011 OVC100 79 74.8 87% 83 29.76 0.0
24 08:55 SW 6 10.00 Overcast BKN011 OVC100 78.4 74.7 88% 81 29.76 0.0
24 08:35 SW 7 10.00 Overcast SCT011 OVC100 78.1 74.8 90% 81 29.75 0.0
24 08:15 S 7 10.00 Overcast BKN011 OVC090 77.2 74.3 91% 79 29.74 0.0
24 07:55 SW 3 10.00 Overcast BKN013 OVC085 76.8 74.3 79.2 74.3 92% 78 29.75 0.0 0.24
24 07:35 S 5 10.00 Overcast OVC013 76.1 73.8 93% 76 29.74 0.0
24 07:15 Calm 10.00 Thunderstorm in Vicinity OVC013 75.2 73.4 94% 74 29.74 0.0
24 06:55 Calm 10.00 Overcast BKN015 OVC070 74.8 72.9 94% 29.74 0.0
24 06:35 Calm 10.00 Thunderstorm SCT018 BKN070 OVC100 75.2 72.5 91% 74 29.75 0.0
24 06:15 Calm 10.00 Mostly Cloudy SCT070 BKN100 74.8 72.5 92% 29.75 0.0
24 05:55 S 7 10.00 Mostly Cloudy BKN100 74.8 72.1 91% 29.74 0.0
24 05:35 S 5 10.00 Thunderstorm in Vicinity OVC100 74.3 71.6 91% 29.75 0.0
24 05:15 S 6 10.00 Mostly Cloudy BKN110 74.3 71.6 91% 29.75 0.0
24 04:55 S 7 10.00 Mostly Cloudy SCT080 BKN110 74.7 71.6 90% 29.75 0.0 0.24
24 04:35 S 9 10.00 Thunderstorm in Vicinity SCT075 BKN120 75.7 72.7 90% 75 29.75 0.0
24 04:15 S 8 10.00 Light Rain BKN016 BKN075 BKN120 76.8 73.2 89% 78 29.75 0.0
24 03:55 S 8 10.00 Thunderstorm OVC018 76.6 73.4 90% 77 29.76 0.0 0.24
24 03:35 SW 6 10.00 Overcast SCT005 OVC018 76.1 73.4 91% 76 29.76 0.0 0.24
24 02:55 W 7 10.00 Thunderstorm BKN018 BKN049 OVC065 79 72 79% 82 29.8 0.0
24 02:35 SW 7 10.00 Thunderstorm in Vicinity SCT018 SCT065 BKN110 78.8 72 80% 82 29.79 0.0
24 02:15 SW 10 10.00 Mostly Cloudy SCT080 BKN110 78.8 71.8 79% 82 29.79 0.0
24 01:35 S 13 G 21 10.00 Fair CLR 79 71.6 78% 82 29.79 0.0
24 01:15 S 10 10.00 Fair CLR 79.2 71.6 78% 82 29.78 0.0
24 00:55 S 13 G 20 10.00 Fair CLR 79.5 71.6 77% 83 29.79 0.0
24 00:35 S 9 G 13 10.00 Fair CLR 79.7 71.6 76% 83 29.79 0.0
24 00:15 S 13 G 17 10.00 Fair CLR 79.9 71.6 76% 83 29.79 0.0
23 23:55 S 12 G 17 10.00 Fair CLR 79.9 71.6 76% 83 29.8 0.0
23 23:35 S 12 G 20 10.00 Fair CLR 80.6 71.4 74% 85 29.8 0.0
23 23:15 S 12 G 18 10.00 Fair CLR 80.8 71.2 73% 85 29.8 0.0
23 22:55 S 15 G 20 10.00 Fair CLR 81.5 70.9 70% 86 29.79 0.0
23 22:35 S 14 G 21 10.00 Fair CLR 81.9 70.5 69% 86 29.79 0.0
23 22:15 S 15 G 21 10.00 Fair CLR 82 70.2 67% 86 29.79 0.0
23 21:55 S 16 G 22 10.00 Fair CLR 82.6 70 66% 87 29.78 0.0
23 21:35 S 13 G 18 10.00 Fair CLR 83.3 70.2 65% 88 29.78 0.0
23 21:15 S 12 G 18 10.00 Fair CLR 83.7 70.7 65% 88 29.78 0.0
23 19:55 S 9 10.00 Fair CLR 86.5 71.1 94.6 86.5 60% 92 29.77 0.0
23 19:35 S 9 10.00 Fair CLR 87.6 71.1 58% 93 29.78 0.0
23 19:15 S 13 G 17 10.00 Fair CLR 88.7 71.1 56% 95 29.77 0.0
23 18:55 S 13 G 20 10.00 Fair CLR 89.6 70.9 54% 96 29.77 0.0
23 18:35 S 15 G 21 10.00 Fair CLR 90.5 70.3 52% 96 29.78 0.0
23 18:15 S 14 G 18 10.00 Partly Cloudy SCT060 91.9 68.4 46% 96 29.77 0.0
23 17:55 S 12 G 17 10.00 Partly Cloudy SCT060 93.7 67.1 42% 98 29.77 0.0
23 17:35 S 16 10.00 Partly Cloudy SCT060 93.6 67.3 42% 97 29.77 0.0
23 17:15 SW 12 G 24 10.00 Partly Cloudy SCT060 93.2 66.2 41% 96 29.78 0.0
23 16:55 SW 15 10.00 Partly Cloudy SCT060 93.9 67.1 41% 98 29.8 0.0
23 16:35 S 12 G 16 10.00 Partly Cloudy SCT060 93.9 67.6 42% 98 29.8 0.0
23 16:15 S 12 G 23 10.00 Fair CLR 92.5 66.6 43% 96 29.81 0.0
23 15:55 S 17 G 26 10.00 Fair CLR 92.7 66.2 42% 96 29.81 0.0
23 15:35 S 17 G 23 10.00 Fair CLR 93 66 41% 96 29.82 0.0
23 15:15 SW 15 G 23 10.00 Partly Cloudy SCT050 93 67.3 43% 97 29.83 0.0
23 14:55 S 17 G 21 10.00 Partly Cloudy SCT050 92.7 68.4 45% 97 29.84 0.0
23 14:35 SW 10 G 17 10.00 Partly Cloudy SCT050 92.5 68 45% 97 29.85 0.0
23 14:15 S 13 G 22 10.00 Partly Cloudy SCT002 SCT048 93 69.1 46% 98 29.86 0.0
23 13:55 SW 10 G 18 10.00 Partly Cloudy SCT048 92.1 68.4 92.7 79 46% 97 29.87 0.0
23 13:35 SW 15 G 21 10.00 Partly Cloudy SCT046 91.6 68.2 46% 96 29.88 0.0
23 13:15 SW 8 G 16 10.00 Partly Cloudy SCT044 90.9 68.7 48% 95 29.89 0.0
23 12:55 SW 12 G 17 10.00 Partly Cloudy SCT040 SCT047 90.7 69.8 50% 96 29.89 0.0
23 12:35 SW 9 10.00 Partly Cloudy SCT038 90.5 70 51% 96 29.9 0.0
23 12:15 S 14 G 17 10.00 Partly Cloudy SCT036 88.7 70.7 55% 94 29.9 0.0
23 11:55 W 10 G 20 10.00 Fair CLR 88.9 70.2 54% 94 29.91 0.0
23 11:35 SW 8 G 17 10.00 Fair CLR 88.7 70.3 55% 94 29.91 0.0
23 11:15 SW 9 10.00 Partly Cloudy SCT032 87.6 71.1 58% 93 29.91 0.0
23 10:55 SW 10 G 17 10.00 Fair CLR 87.3 71.1 59% 93 29.92 0.0
23 10:35 SW 9 10.00 Partly Cloudy SCT028 86.2 71.4 62% 92 29.92 0.0
23 10:15 SW 10 10.00 Partly Cloudy SCT026 86.7 71.6 61% 93 29.92 0.0
23 09:55 S 8 10.00 Partly Cloudy SCT025 84.7 72.1 66% 91 29.92 0.0
23 09:35 SW 7 G 16 10.00 Partly Cloudy SCT023 84 72 67% 90 29.94 0.0
23 09:15 SW 12 10.00 Partly Cloudy SCT021 82.8 72 70% 88 29.94 0.0
23 08:55 SW 7 10.00 Partly Cloudy SCT019 81.9 72 72% 87 29.95 0.0
23 08:35 SW 7 G 16 10.00 Fair CLR 80.6 72.1 76% 85 29.95 0.0
23 08:15 SW 7 G 16 10.00 Fair CLR 79.5 72 78% 83 29.96 0.0
23 07:55 SW 9 10.00 Fair CLR 78.8 71.8 78.8 73.9 79% 82 29.96 0.0
23 07:35 SW 6 10.00 Partly Cloudy SCT011 77.7 72 83% 80 29.96 0.0
23 07:15 SW 8 10.00 Partly Cloudy SCT011 76.5 71.8 86% 77 29.96 0.0
23 06:55 SW 8 10.00 Partly Cloudy SCT011 SCT065 75.6 71.6 88% 75 29.96 0.0
23 06:35 SW 8 10.00 Partly Cloudy SCT065 75.2 71.1 87% 75 29.97 0.0
23 06:15 S 7 10.00 Fair CLR 74.3 70.7 89% 29.96 0.0
23 05:55 SW 7 10.00 Fair CLR 73.9 70.7 90% 29.96 0.0
23 05:35 S 6 10.00 Fair CLR 73.9 70.7 90% 29.96 0.0
23 05:15 S 6 10.00 Fair CLR 74.3 70.7 89% 29.96 0.0
23 04:55 SW 5 10.00 Fair CLR 74.5 70.7 88% 29.96 0.0
23 04:35 SW 5 10.00 Fair CLR 74.7 70.7 88% 29.96 0.0
23 04:15 SW 7 10.00 Fair CLR 74.7 70.7 88% 29.96 0.0
23 03:55 S 6 10.00 Fair CLR 74.5 70.7 88% 29.96 0.0
23 03:35 S 6 10.00 Fair CLR 74.8 70.7 87% 29.97 0.0
23 03:15 SW 6 10.00 Fair CLR 75.2 70.7 86% 75 29.97 0.0
23 02:55 S 7 10.00 Fair CLR 75.6 70.7 85% 76 29.97 0.0
23 02:35 S 7 10.00 Fair CLR 75.7 70.7 84% 76 29.97 0.0
23 02:15 S 7 10.00 Fair CLR 76.1 70.9 84% 77 29.98 0.0
23 01:55 S 8 10.00 Fair CLR 76.3 70.9 87.1 76.3 83% 77 29.98 0.0
23 01:35 S 7 10.00 Fair CLR 77 71.1 82% 79 29.98 0.0
23 01:15 S 7 10.00 Fair CLR 77 71.1 82% 79 29.98 0.0
23 00:55 S 7 10.00 Fair CLR 77.4 71.2 82% 79 29.98 0.0
23 00:35 S 7 10.00 Fair CLR 77.9 71.2 80% 80 29.98 0.0
23 00:15 S 6 10.00 Fair CLR 78.1 71.2 80% 80 29.98 0.0
22 23:55 S 6 10.00 Fair CLR 78.4 71.4 79% 81 29.99 0.0
22 23:35 S 6 10.00 Fair CLR 79 71.6 78% 82 29.99 0.0
22 23:15 S 5 10.00 Fair CLR 79.5 71.8 77% 83 29.99 0.0
22 22:55 S 7 10.00 Fair CLR 80.1 72.1 77% 84 29.99 0.0
22 22:35 S 6 10.00 Fair CLR 80.2 72.5 77% 84 29.99 0.0
22 22:15 S 7 10.00 Fair CLR 80.8 72.5 76% 85 29.99 0.0
22 21:55 S 8 10.00 Fair CLR 81 72.5 76% 86 29.99 0.0
22 21:35 S 6 10.00 Fair CLR 81.7 72.5 74% 87 29.98 0.0
22 21:15 SE 5 10.00 Fair CLR 81.5 73 76% 87 29.98 0.0
22 20:55 SE 5 10.00 Fair CLR 82 72.9 74% 87 29.97 0.0
22 20:35 SE 5 10.00 Fair CLR 83.3 72.7 70% 89 29.97 0.0
22 20:15 SE 5 10.00 Fair CLR 84.6 71.6 65% 90 29.97 0.0
22 19:55 SE 5 10.00 Fair CLR 87.4 68.9 94.5 87.4 54% 92 29.96 0.0
22 19:35 S 6 10.00 Fair CLR 88.7 67.5 50% 92 29.96 0.0
22 19:15 S 7 10.00 Fair CLR 90 65.3 44% 92 29.96 0.0
22 18:55 S 7 10.00 Fair CLR 91 64.2 41% 93 29.96 0.0
22 18:35 S 9 10.00 Fair CLR 91.6 63.3 39% 93 29.96 0.0
22 18:15 SW 9 10.00 Fair CLR 92.3 63.9 39% 94 29.97 0.0
22 17:55 SW 8 10.00 Fair CLR 92.3 63.9 39% 94 29.97 0.0
22 17:35 SW 8 10.00 Fair CLR 92.8 65.1 40% 95 29.98 0.0
22 17:15 SW 7 10.00 Fair CLR 92.5 64.2 39% 94 29.98 0.0
22 16:55 SW 7 10.00 Fair CLR 93.2 65.3 40% 96 29.99 0.0
22 16:35 SW 7 10.00 Partly Cloudy SCT060 93.4 65.3 40% 96 30 0.0
22 16:15 S 8 10.00 Partly Cloudy SCT060 92.8 66 41% 96 30 0.0
22 15:55 SW 6 10.00 Partly Cloudy SCT060 93 65.7 41% 96 30.01 0.0
22 15:35 SW 3 10.00 Fair CLR 94.5 65.7 39% 97 30.01 0.0
22 15:15 SW 6 10.00 Partly Cloudy SCT060 92.7 64.8 40% 95 30.02 0.0
22 14:55 W 8 10.00 Fair CLR 92.7 64.2 39% 94 30.03 0.0
22 14:35 S 9 10.00 Fair CLR 91.8 65.5 42% 94 30.04 0.0
22 14:15 S 9 10.00 Partly Cloudy SCT055 91.9 67.3 44% 96 30.05 0.0
22 13:55 SW 7 10.00 Fair CLR 91.6 66.2 92.1 75.9 43% 94 30.06 0.0
22 13:35 SW 6 10.00 Fair CLR 91.9 64.8 41% 94 30.06 0.0
22 13:15 SW 6 10.00 Partly Cloudy SCT048 90.9 66 44% 94 30.07 0.0
22 12:55 SW 5 10.00 Partly Cloudy SCT048 90.1 66.2 45% 93 30.08 0.0
22 12:35 S 6 10.00 Partly Cloudy SCT046 90 65.8 45% 92 30.08 0.0
22 12:15 S 5 10.00 Fair CLR 88.9 67.6 50% 92 30.09 0.0
22 11:55 SW 7 10.00 Partly Cloudy SCT036 88.9 69.6 53% 94 30.1 0.0
22 11:35 W 6 10.00 Partly Cloudy SCT034 88.3 70.2 55% 94 30.1 0.0
22 11:15 SW 6 10.00 Partly Cloudy SCT029 87.1 70.9 59% 93 30.11 0.0
22 10:55 SW 5 10.00 Fair CLR 87.1 71.6 60% 93 30.11 0.0
22 10:35 W 7 10.00 Fair CLR 85.8 70.7 61% 91 30.11 0.0
22 10:15 W 3 10.00 Fair CLR 84.9 71.2 64% 90 30.11 0.0
22 09:55 W 5 10.00 Partly Cloudy SCT018 83.3 72.1 69% 89 30.12 0.0
22 09:35 W 6 10.00 Partly Cloudy SCT018 82.9 72.3 70% 88 30.12 0.0
22 09:15 W 5 10.00 Partly Cloudy SCT011 81.3 72.7 75% 86 30.13 0.0
22 08:55 W 8 10.00 Partly Cloudy SCT011 79.7 72.7 79% 84 30.13 0.0
22 08:35 W 7 10.00 Partly Cloudy SCT009 78.4 72.7 83% 81 30.14 0.0
22 08:15 SW 3 10.00 Partly Cloudy SCT007 77 72.5 86% 78 30.14 0.0
22 07:55 SW 6 10.00 Partly Cloudy SCT007 SCT110 75.7 72.1 75.7 69.8 89% 76 30.14 0.0
22 07:35 SW 5 10.00 Fair CLR 73.9 72.5 95% 30.14 0.0
22 07:15 S 3 10.00 Fair CLR 72.9 71.8 96% 30.13 0.0
22 06:55 S 5 7.00 Partly Cloudy SCT002 SCT013 71.8 70.7 96% 30.13 0.0
22 06:35 S 3 0.50 Fog OVC002 71.2 70.2 96% 30.13 0.0
22 06:15 S 3 1.50 Fog/Mist OVC002 70.2 69.1 96% 30.13 0.0
22 05:55 Calm 2.50 Fog/Mist OVC004 70.5 69.4 96% 30.13 0.0
22 05:35 S 3 5.00 Fog/Mist SCT004 SCT055 SCT070 70.5 69.1 95% 30.13 0.0
22 05:15 Calm 10.00 Partly Cloudy SCT004 SCT120 70.9 69.8 96% 30.13 0.0
22 04:55 SW 3 10.00 Fair CLR 70.9 69.8 96% 30.13 0.0
22 04:35 S 3 10.00 Fair CLR 70.9 69.8 96% 30.13 0.0
22 04:15 S 5 10.00 Fair CLR 70.7 69.3 95% 30.14 0.0
22 03:55 Calm 10.00 Fair CLR 71.6 70.2 95% 30.14 0.0
22 03:35 Calm 10.00 Fair CLR 71.6 70 95% 30.14 0.0
22 03:15 S 3 10.00 Fair CLR 71.6 70 95% 30.14 0.0
22 02:55 S 3 10.00 Fair CLR 72.3 70.5 94% 30.14 0.0
22 02:35 S 3 10.00 Fair CLR 72.3 70.5 94% 30.15 0.0
22 02:15 S 5 10.00 Fair CLR 72.5 70.3 93% 30.15 0.0
22 01:55 S 3 10.00 Fair CLR 71.8 70 80.8 71.6 94% 30.16 0.0
22 01:35 S 5 10.00 Fair CLR 71.8 69.8 94% 30.16 0.0
22 01:15 S 5 10.00 Fair CLR 72 70 94% 30.16 0.0
22 00:55 Calm 10.00 Fair CLR 72.9 70.2 91% 30.16 0.0
22 00:35 S 3 10.00 Fair CLR 73 70.2 91% 30.16 0.0
22 00:15 S 3 10.00 Fair CLR 73.6 70.2 89% 30.17 0.0
21 23:55 S 5 10.00 Fair CLR 73.9 70.3 89% 30.17 0.0
Date Time (edt) 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)