Typhoon Ma-On (2011)
Typhoon Ma-On reached Category 4 in the Western Pacific between July 10, 2011 and July 31, 2011, with a lowest pressure of 937 mb, and made landfall.
Radar
Reflectivity now over Typhoon Ma-On. Open it to see storms, cones and warnings on the map.
Radar mosaic and map layers from NOAA MRMS. Boundaries from the Iowa Environmental Mesonet.
The storm
- Basin
- Western Pacific
- Dates
- July 10, 2011 to July 31, 2011
- Peak strength
- Category 4, 115 kt (132 mph)
- Lowest pressure
- 937 mb (27.67 inHg)
- Landfall
- Yes
- Accumulated cyclone energy
- 27.0
- Tropical-storm-force wind reached
- 240 nmi (444 km, 276 mi) from the center at its widest
- Hurricane-force wind reached
- 65 nmi (120 km, 75 mi) from the center at its widest
- Eyewall radius at its peak
- 15 nmi (28 km, 17 mi)
- Overall size
- 337 nmi (624 km, 388 mi) to the outermost closed isobar
- Peak gust in the best track
- 140 kt (161 mph)
- Fastest the center moved
- 22 kt (25 mph)
- Identifier
- WP082011
Deaths and damage
No source this site reads carries a casualty or damage figure for this storm.
Track
| Time (UTC) | Position | Wind | Pressure | Status |
|---|---|---|---|---|
| Jul 10, 18:00 | 17.9N 158.3E | 15 kt | 1010 mb | Disturbance |
| Jul 11, 00:00 | 18.1N 158.4E | 20 kt | 1007 mb | Disturbance |
| Jul 11, 06:00 | 18.0N 158.0E | 25 kt | 1004 mb | Tropical depression |
| Jul 11, 12:00 | 18.1N 157.3E | 30 kt | 1005 mb | Tropical depression |
| Jul 11, 18:00 | 18.3N 156.6E | 30 kt | 1000 mb | Tropical depression |
| Jul 12, 00:00 | 18.5N 155.9E | 30 kt | 1000 mb | Tropical depression |
| Jul 12, 06:00 | 18.7N 155.2E | 35 kt | 996 mb | Tropical storm |
| Jul 12, 12:00 | 18.9N 154.4E | 35 kt | 996 mb | Tropical storm |
| Jul 12, 18:00 | 19.2N 153.6E | 45 kt | 989 mb | Tropical storm |
| Jul 13, 00:00 | 19.5N 152.6E | 55 kt | 982 mb | Tropical storm |
| Jul 13, 06:00 | 19.7N 151.3E | 60 kt | 978 mb | Tropical storm |
| Jul 13, 12:00 | 19.8N 150.0E | 65 kt | 974 mb | Typhoon |
| Jul 13, 18:00 | 19.9N 148.7E | 80 kt | 963 mb | Typhoon |
| Jul 14, 00:00 | 20.0N 147.4E | 90 kt | 956 mb | Typhoon |
| Jul 14, 06:00 | 20.1N 146.2E | 90 kt | 956 mb | Typhoon |
| Jul 14, 12:00 | 20.2N 145.0E | 95 kt | 952 mb | Typhoon |
| Jul 14, 18:00 | 20.3N 143.7E | 100 kt | 948 mb | Typhoon |
| Jul 15, 00:00 | 20.4N 142.5E | 110 kt | 941 mb | Typhoon |
| Jul 15, 06:00 | 20.7N 141.5E | 110 kt | 941 mb | Typhoon |
| Jul 15, 12:00 | 20.6N 140.5E | 105 kt | 944 mb | Typhoon |
| Jul 15, 18:00 | 20.8N 139.6E | 105 kt | 944 mb | Typhoon |
| Jul 16, 00:00 | 21.1N 138.7E | 105 kt | 944 mb | Typhoon |
| Jul 16, 06:00 | 21.3N 137.8E | 115 kt | 937 mb | Typhoon |
| Jul 16, 12:00 | 21.9N 137.1E | 115 kt | 937 mb | Typhoon |
| Jul 16, 18:00 | 22.7N 136.4E | 110 kt | 941 mb | Typhoon |
| Jul 17, 00:00 | 23.5N 135.6E | 110 kt | 941 mb | Typhoon |
| Jul 17, 06:00 | 24.4N 134.6E | 105 kt | 944 mb | Typhoon |
| Jul 17, 12:00 | 25.2N 133.8E | 100 kt | 948 mb | Typhoon |
| Jul 17, 18:00 | 26.0N 133.4E | 90 kt | 956 mb | Typhoon |
| Jul 18, 00:00 | 27.1N 133.3E | 90 kt | 956 mb | Typhoon |
| Jul 18, 06:00 | 28.4N 133.2E | 85 kt | 959 mb | Typhoon |
| Jul 18, 12:00 | 29.7N 133.0E | 75 kt | 967 mb | Typhoon |
| Jul 18, 18:00 | 30.9N 132.8E | 75 kt | 967 mb | Typhoon |
| Jul 19, 00:00 | 31.9N 132.9E | 70 kt | 970 mb | Typhoon |
| Jul 19, 06:00 | 32.7N 133.3E | 70 kt | 970 mb | Typhoon |
| Jul 19, 12:00 | 33.3N 134.1E | 70 kt | 970 mb | Typhoon |
| Jul 19, 18:00 | 33.6N 134.8E | 65 kt | 974 mb | Typhoon |
| Jul 20, 00:00 | 33.6N 135.7E | 60 kt | 978 mb | Tropical storm |
| Jul 20, 06:00 | 33.6N 136.9E | 55 kt | 982 mb | Tropical storm |
| Jul 20, 12:00 | 33.0N 137.9E | 55 kt | 982 mb | Tropical storm |
| Jul 20, 18:00 | 32.1N 138.6E | 45 kt | 989 mb | Tropical storm |
| Jul 21, 00:00 | 31.2N 139.3E | 40 kt | 993 mb | Tropical storm |
| Jul 21, 06:00 | 30.7N 140.8E | 35 kt | 996 mb | Tropical storm |
| Jul 21, 12:00 | 30.5N 141.8E | 25 kt | 1004 mb | Tropical depression |
| Jul 21, 18:00 | 29.8N 142.1E | 20 kt | 1007 mb | Disturbance |
| Jul 22, 00:00 | 28.9N 142.8E | 20 kt | 1006 mb | Disturbance |
| Jul 22, 06:00 | 28.9N 144.3E | 15 kt | 1010 mb | Disturbance |
| Jul 22, 12:00 | 30.6N 144.3E | 45 kt | 990 mb | Tropical storm |
| Jul 22, 18:00 | 31.5N 144.6E | 45 kt | 990 mb | Tropical storm |
| Jul 23, 00:00 | 32.4N 145.0E | 45 kt | 990 mb | Tropical storm |
| Jul 23, 06:00 | 33.4N 145.5E | 45 kt | 990 mb | Tropical storm |
| Jul 23, 12:00 | 34.5N 146.2E | 45 kt | 990 mb | Tropical storm |
| Jul 23, 18:00 | 36.3N 146.9E | 45 kt | 990 mb | Tropical storm |
| Jul 24, 00:00 | 37.8N 147.9E | 45 kt | 990 mb | Tropical storm |
| Jul 24, 06:00 | 39.6N 149.2E | 45 kt | 992 mb | Mixed |
| Jul 24, 12:00 | 41.6N 150.3E | 994 mb | Extratropical | |
| Jul 24, 18:00 | 43.1N 151.1E | 998 mb | Extratropical | |
| Jul 25, 00:00 | 44.5N 152.5E | 1000 mb | Extratropical | |
| Jul 25, 06:00 | 45.7N 153.1E | 1000 mb | Extratropical | |
| Jul 25, 12:00 | 46.1N 154.2E | 1002 mb | Extratropical | |
| Jul 25, 18:00 | 46.1N 155.0E | 1002 mb | Extratropical | |
| Jul 26, 00:00 | 45.8N 156.5E | 1004 mb | Extratropical | |
| Jul 26, 06:00 | 45.5N 157.9E | 1004 mb | Extratropical | |
| Jul 26, 12:00 | 45.3N 159.0E | 1004 mb | Extratropical | |
| Jul 26, 18:00 | 45.0N 159.3E | 1004 mb | Extratropical | |
| Jul 27, 00:00 | 43.8N 160.8E | 1004 mb | Extratropical | |
| Jul 27, 06:00 | 43.3N 161.1E | 1004 mb | Extratropical | |
| Jul 27, 12:00 | 42.6N 161.0E | 1004 mb | Extratropical | |
| Jul 27, 18:00 | 41.9N 161.1E | 1002 mb | Extratropical | |
| Jul 28, 00:00 | 41.5N 161.1E | 1002 mb | Extratropical | |
| Jul 28, 06:00 | 41.2N 161.0E | 1000 mb | Extratropical | |
| Jul 28, 12:00 | 40.7N 160.7E | 1000 mb | Extratropical | |
| Jul 28, 18:00 | 40.8N 161.7E | 1000 mb | Extratropical | |
| Jul 29, 00:00 | 42.2N 162.2E | 1000 mb | Extratropical | |
| Jul 29, 06:00 | 43.6N 163.0E | 1000 mb | Extratropical | |
| Jul 29, 12:00 | 44.8N 163.4E | 1000 mb | Extratropical | |
| Jul 29, 18:00 | 45.8N 163.4E | 1000 mb | Extratropical | |
| Jul 30, 00:00 | 47.1N 163.6E | 1004 mb | Extratropical | |
| Jul 30, 06:00 | 48.1N 163.8E | 1004 mb | Extratropical | |
| Jul 30, 12:00 | 49.3N 163.8E | 1008 mb | Extratropical | |
| Jul 30, 18:00 | 50.7N 164.1E | 1010 mb | Extratropical | |
| Jul 31, 00:00 | 51.7N 164.7E | 1012 mb | Extratropical |
Other Western Pacific storms of 2011
- Unnamed tropical depressionWestern Pacific · 2011
- Unnamed tropical depressionWestern Pacific · 2011
- Tropical Storm AereWestern Pacific · 2011
- Super Typhoon SongdaWestern Pacific · 2011
- Unnamed tropical depressionWestern Pacific · 2011
- Tropical Depression SarikaWestern Pacific · 2011
- Tropical Storm HaimaWestern Pacific · 2011
- Tropical Storm MeariWestern Pacific · 2011
- Tropical Depression TokageWestern Pacific · 2011
- Typhoon Nock-TenWestern Pacific · 2011
- Super Typhoon MuifaWestern Pacific · 2011
- Typhoon MerbokWestern Pacific · 2011
- Unnamed tropical depressionWestern Pacific · 2011
- Super Typhoon NanmadolWestern Pacific · 2011
- Tropical Storm TalasWestern Pacific · 2011
- Tropical Storm NoruWestern Pacific · 2011
- Tropical Storm KulapWestern Pacific · 2011
- Typhoon RokeWestern Pacific · 2011
- Typhoon SoncaWestern Pacific · 2011
- Typhoon NesatWestern Pacific · 2011
- Tropical Storm HaitangWestern Pacific · 2011
- Super Typhoon NalgaeWestern Pacific · 2011
- Tropical Depression BanyanWestern Pacific · 2011
- Unnamed tropical depressionWestern Pacific · 2011
- Unnamed tropical depressionWestern Pacific · 2011
- Unnamed tropical depressionWestern Pacific · 2011
- Tropical Storm WashiWestern Pacific · 2011
What this means
A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.
Sources
Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.