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| 10-min winds=95
| 10-min winds=95
| Pressure=935
| Pressure=935
| Damages=
| Damages=0
| Fatalities=0
| Fatalities=0
| Areas=[[Northern Mariana Islands]]
| Areas=[[Northern Mariana Islands]]

Revision as of 09:47, 17 July 2011

Template:Two other uses

Typhoon Ma-on
Very strong typhoon (JMA scale)
Category 4 typhoon (SSHWS)
FormedJuly 11, 2011
DissipatedStill Active
Highest winds10-minute sustained: 175 km/h (110 mph)
1-minute sustained: 215 km/h (130 mph)
Lowest pressure935 hPa (mbar); 27.61 inHg
Fatalities0
DamageNone
Areas affectedNorthern Mariana Islands
Part of the 2011 Pacific typhoon season
Typhoon Ma-on
Current storm status
Typhoon  (JMA)
Current storm status
Category 3 typhoon (1-min mean)
Satellite image
Storm path
As of:0650 UTC July 17
Location:24.6°N 134.5°E
About 1415 km (880 mi) SSW of Tokyo, Japan
Sustained winds:95 knots (175 km/h; 110 mph) (10-min mean)
110 knots (200 km/h; 125 mph) (1-min mean)
gusting to 135 knots (250 km/h; 155 mph)
Pressure:935 hPa (mbar; 27.61 inHg)
Movement:NW at 15 kt (28 km/h; 17 mph)
See more detailed information.

Typhoon Ma-on (international designation: 1106, JTWC designation: 08W, PAGASA Name: Ineng) is a powerful typhoon that is forecast to strike Japan in a few days. It was the sixth named storm and second typhoon of the 2011 Pacific typhoon season.

Meteorological history

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
Saffir–Simpson scale
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

The origins of the typhoon were from an area of convection that persisted near Wake Island on July 9.[1] The system slowly organized as it developed a low-level circulation. With low wind shear and generally favorable environmental conditions, tropical cyclone forecast models anticipated the development of a tropical cyclone from the system.[2] Early on July 11, the Joint Typhoon Warning Center (JTWC) issued a tropical cyclone formation alert,[3] and a few hours later the Japan Meteorological Agency (JMA) reported the formation of a tropical depression about halfway between Wake Island and the Northern Marianas Islands.[4] The JTWC followed suit by initiating advisories on Tropical Depression 08W.[5]

Upon its formation, the depression tracked westward due to a ridge to its north.[6] The circulation was initially broad and ill-defined, while its convection was disorganized due to dry air. It was able to intensify due to generally favorable conditions,[7] and the JMA upgraded the depression to Tropical Storm Ma-on at 0600 UTC on July 12.[8] Gradually the thunderstorms became concentrated around the center, despite restricted outflow to the north and west. Ma-on intensified at a slower than climatological rate, although an eye feature became evident by early on July 13.[9] At 0000 UTC that day, the JMA upgraded Ma-on to a severe tropical storm,[10] and 18 hours later they upgraded it to a typhoon.[11] By that time, it was located about 970 km (575 mi) southeast of Iwo Jima. A ragged eye became apparent on satellite imagery, and after developing an anticyclone aloft, its outflow became much better defined.[12]

Preparations and impact

After Ma-on attained tropical storm status, the Tiyan, Guam National Weather Service office issued a tropical storm watch for Agrihan, Pagan, and Alamagan.[13] It was later upgraded to a tropical storm warning after Ma-on became a typhoon,[14] which was canceled after the storm passed the islands to the north.[15] The typhoon produced high waves in Guam,[16] as well as gusty winds and precipitation in an outer feeder band.[17]

See also

References

  1. ^ http://www.webcitation.org/603ZefTlH
  2. ^ http://www.webcitation.org/604Svx9ck
  3. ^ http://www.webcitation.org/605p9VXCq
  4. ^ http://www.webcitation.org/606R4LxP3
  5. ^ http://www.webcitation.org/606RBFEt6
  6. ^ http://www.webcitation.org/606jQibHf
  7. ^ http://www.webcitation.org/607ugZQFB
  8. ^ http://www.webcitation.org/607IDgR1M
  9. ^ http://www.webcitation.org/609EbsWju
  10. ^ http://www.webcitation.org/609DbQqZH
  11. ^ http://www.webcitation.org/60AvGVnvL
  12. ^ http://www.webcitation.org/60AwXe7kW
  13. ^ http://www.webcitation.org/609EQ6hN3
  14. ^ http://www.webcitation.org/60Aw6XBgw
  15. ^ http://www.webcitation.org/60BsKx31a
  16. ^ Staff Writer (2011-07-15). "Be safe: Heed weather and water warnings; take caution this weekend". Pacific Daily News. Retrieved 2011-07-15.
  17. ^ Staff Writer (2011-07-13). "NWS: Overnight Wind and Rain Blamed on "Tail" of Tropical Storm Ma-On". Pacific News Center. Guam News. Retrieved 2011-07-15.
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