Tuesday, June 12, 2012

Cyclone watch

Tropical Cyclone Information

Typhoon in effect:

SONAMU (STS 1301) [i] is the first tropical storm (typhoon) in the year 2013 in the western North Pacific and the South China Sea (Jan 3, 2013). The word Sonamu means Pine tree. The naming adopted by the ESCAP/WMO Typhoon Committee, is contributed by DPR Korea.

The tropical cyclone in this region occurred relatively very early compared to occurrence of typhoon in recent years. Last year the first typhoon was announced by JTWC/JMA on March 29th only.

Typhoons in 2013:

STS 1301 (SONAMU) (Jan 3) (meaning: Pine tree / Orig: DPR Korea)

Typhoons in 2012:

TS 1201 (Pakhar) (Mar 29) (meaning fresh water fish, which lives in lower Mekong River / Orig: Lao PDR)
STS 1202 (Sanvu) (May 22) (meaning Coral / Orig: Macao, China)
STS 1203 (Mawar) (Jun 1) (meaning Rose / Orig: Malaysia)
TY 1204 (Guchol) (Jun 12) (meaning Turmeric / Orig: Micronesia)
STS 1205 (Talim) (Jun 17) (meaning sharp cutting edge / Orig: Philippines)
TS 1206 (Doksuri) (Jun 26) (meaning Eagle / Orig: Republic of Korea)
STS 1207 (KHANUN) (Jul 16) (meaning Jackfruit / Orig: Thai)
TY 1208 (VICENTE) (Jul 21) (meaning Chamorro man's name / Orig: USA)
TY 1209 (SAOLA) (Jul 28) (meaning Newly found animal in Vietnam / Orig: Vietnam)
STS 1210 (DAMREY) (Jul 28) (meaning Elephant / Orig: Cambodia)
TY 1211 (HAIKUI) (Aug 3) (meaning A kind of submarine animal appearing like sunflower / Orig: China)
STS 1212 (KIROGI) (Aug 7) (meaning Wild goose / Orig: DPR Korea)
TY 1213 (KAI-TAK) (Aug 13) (meaning: name of old HongKong airport / HK, China)
TY 1214 (TEMBIN) (Aug 19) (meaning: Libra; balance / Orig: Japan)
TY 1215 (BOLAVEN) (Aug 20) (meaning: Plateau in the southern part of LAO / Orig: Lao PDR)
TY 1216 (SANBA) (Sep 11) (meaning: Placename in Macao / Orig: Macao, China)
TY 1217 (JELAWAT) (Sep 20) (meaning: A fresh water fish / Orig: Malaysia)
STS 1218 (EWINIAR) (Sep 24) (meaning: Chuuk traditional storm god  / Orig: Micronesia)
STS 1219 (MALIKSI) (Oct 1) (meaning: Filipino word meaning fast  / Orig: Philippines)
STS 1220 (GAEMI) (Oct 1) (meaning: Ant  / Orig: R.O. Korea)
TY 1221 (PRAPIROON) (Oct 7) (meaning: God of Rain  / Orig: Thailand)
STS 1222 (MARIA) (Oct 14) (meaning: Chamorro woman's name / Orig: U.S.A.)
TY 1223 (SON-TINH) (Oct 24) (meaning: God of mountain in Vietnamese myth / Orig: Viet Nam)
TY 1224 (BOPHA) (Nov 27) (meaning: Flower/the name of little girl / Orig: Cambodia)
TS 1225 (WUKONG) (Dec 25) (meaning: Famous hero in Chinese story / Orig: China)

Tropical storm category / scale in North West Pacific basin (JMA scale) >>
Code Category 10-minute sustained winds [wiki]
TD Tropical Depression < 30-33 knots (< 56-61 km/h)
TS Tropical Storm 34-47 knots (63-87 km/h)
STS Severe Tropical Storm 48-63 knots (89-117 km/h)
TY Typhoon >64knots ( >119 km/h)

Past 36 hours animated satellite image
Tropical storm, weather, satellite, image, Kathmandu, Nepal, typhoon, cyclone, tropical storm, pakhar, sanvu, 台風,2号,1,2,3,4,5,6,7,8,9,10,号, storm path, tropical depression

IR Satellite image: Aviation Weather Center, NOAA

Kathmandu Sky NOW

weather, Kathmandu, Nepal, IR Satellite Image, rain, clouds, forecast, current sky

Related topics:
Kathmandu Rainfall Watch
Nepal Flood Watch

A Tropical Cyclone is
a storm system characterized by a low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Tropical cyclones strengthen when water evaporated from the ocean is released as the saturated air rises, resulting in condensation of water vapor contained in the moist air. They are fueled by a different heat mechanism than other cyclonic windstorms such as nor'easters, European windstorms, and polar lows. The characteristic that separates tropical cyclones from other cyclonic systems is that at any height in the atmosphere, the center of a tropical cyclone will be warmer than its surroundings; a phenomenon called "warm core" storm systems.

The term "tropical" refers both to the geographical origin of these systems, which usually form in tropical regions of the globe, and to their formation in maritime tropical air masses. The term "cyclone" refers to such storms' cyclonic nature, with counterclockwise wind flow in the Northern Hemisphere and clockwise wind flow in the Southern Hemisphere. The opposite direction of the wind flow is a result of the Coriolis force. Depending on its location and strength, a tropical cyclone is referred to by names such as hurricane (/ˈhʌrɨkeɪn/, /ˈhʌrɨkən/), typhoon, tropical storm, cyclonic storm, tropical depression, and simply cyclone.

While tropical cyclones can produce extremely powerful winds and torrential rain, they are also able to produce high waves and damaging storm surge as well as spawning tornadoes. They develop over large bodies of warm water, and lose their strength if they move over land due to increased surface friction and loss of the warm ocean as an energy source. This is why coastal regions can receive significant damage from a tropical cyclone, while inland regions are relatively safe from receiving strong winds. Heavy rains, however, can produce significant flooding inland, and storm surges can produce extensive coastal flooding up to 40 kilometres (25 mi) from the coastline. Although their effects on human populations can be devastating, tropical cyclones can relieve drought conditions. They also carry heat energy away from the tropics and transport it toward temperate latitudes, which makes them an important part of the global atmospheric circulation mechanism. As a result, tropical cyclones help to maintain equilibrium in the Earth's troposphere, and to maintain a relatively stable and warm temperature worldwide.

Many tropical cyclones develop when the atmospheric conditions around a weak disturbance in the atmosphere are favorable. The background environment is modulated by climatological cycles and patterns such as the Madden-Julian oscillation, El Niño-Southern Oscillation, and the Atlantic multidecadal oscillation. Others form when other types of cyclones acquire tropical characteristics. Tropical systems are then moved by steering winds in the troposphere; if the conditions remain favorable, the tropical disturbance intensifies, and can even develop an eye. On the other end of the spectrum, if the conditions around the system deteriorate or the tropical cyclone makes landfall, the system weakens and eventually dissipates. It is not possible to artificially induce the dissipation of these systems with current technology. text: wikipedia

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