Daily update- Wednesday, April 27, 2016

NWPAC outlook, 27 APR

NWPAC outlook, 27 APR

Temperatures cool just a bit in the north region while clouds and showers dominate most of the central region. More heat is in store for the south as the tropics show a little life but nothing of real importance. 


A strong impulse of energy will slide out of eastern China, south of South Korea, and into southwestern Japan today, bringing in plenty of clouds and showers. The cloudy canopy is helping to keep temperatures down from the near-record levels they have seen over the past 3 days in parts of eastern China and Korea. This storm system will team up with a slow-moving cold front over central Japan tonight and tomorrow and bring heavy rain to some parts of the archipelago. Conditions are much better to the west and north, where warm spring temperatures abound under partly cloudy skies.

City High Temp C (F) Low Temp C (F) Conditions
Ulaanbaatar 17 (63) 2 (36) Partly Cloudy
Vladivostok 11 (52) 2 (36) Partly Cloudy
Beijing 20 (68) 11 (52) Cloudy
Seoul 19 (66) 10 (50) Cloudy
Tokyo 19 (66) 15 (59) Scattered Showers
Xi’an 29 (84) 12 (54) Fair
Shanghai 63 (66) 13 (55) Cloudy



The seasonal east Asian monsoon, also known as the méiyǔ or plum rains, is starting to set up very well as continuous pulses of energy from the west slide over the boundary between the continental air to the north and the humid, tropical air to the south that is slowly propagating northward. The entire region will see a good chance for showers and occasional thunderstorms today as another pulse of energy moves offshore of eastern China, dragging a weak trough through southeastern China, Taiwan, and the Ryukyu Islands. This trough will be the focal points of the activity in the region, while areas to the west and south will deal with moisture associated with new energy coming in from the west.

City High Temp C (F) Low Temp C (F) Conditions
Kunming 24 (75) 11 (52) Scattered Showers
Hong Kong 28 (82) 24 (75) Sctd Thunderstorms
Taipei 29 (84) 21 (70) Thunderstorms
Naha 27 (81) 20 (68) Thunderstorms
Hanoi 26 (79) 23 (73) Sctd Thunderstorms



The heat stays in place in the south, but the good news is, most locations will see air temperatures stay below 40C (104F) today, however, when factoring in the humidity that continues to build into the region, we could see indices well in excess of 45C (113F) across Laos and interior locations within Cambodia, Thailand, Vietnam, and the northern Philippines. Very humid, tropical air is building in the southern half of the region, where the best chances for rain can be found.

City High Temp C (F) Low Temp C (F) Conditions
Siem Reap 39 (102) 29 (84) Fair
Ho Chi Minh 37 (99) 28 (82) Partly Cloudy
Manila 36 (97) 26 (79) Fair
Davao City 33 (91) 25 (77) Sctd Thunderstorms
Brunei 32 (90) 26 (79) Thunderstorms
Singapore 32 (90) 27 (81) Thunderstorms



The tropics are still showing some signs of things to come, as a daily dose of direct sunshine heats up the ocean and helps the humidity build across the region. The trough mentioned yesterday continues to track westward in a strong fetch of easterlies associated with the trade winds and I.T.C.Z. (Inter-Tropical Convergence Zone). It’s still located in far western Micronesia, extending from NW to SE between longitude 127.0E-141.0E, and latitude 13.0N-4.0N. This system is expected to remain weak as it slows down in the next day or so and dissipates in a weak surge of energy from the north. Another area that looks impressive on satellite is far to the east in the Marshall Islands. Although this area will be responsible for clouds and showers, no development is expected at any point in the foreseeable future. Due to the building moisture and intense sunshine, showers and thunderstorms are a good bet just about anywhere throughout the tropical region below 10 degrees north latitude, with the Mariana Islands and Wake Island being the exceptions.

City High Temp C (F) Low Temp C (F) Conditions
Guam 31 (88) 25 (77) Fair
Yap 33 (91) 26 (79) Sctd Thunderstorms
Palau 30 (86) 27 (81) Thunderstorms
Chuuk 31 (88) 27 (81) Thunderstorms
Pohnpei 32 (90) 27 (81) Thunderstorms
Majuro 28 (82) 26 (79) Thunderstorms
Wake 26 (79) 24 (75) Fair

Have a wacky Wednesday!

Courtesy: CIMSS, Tropical Tidbits, Intellicast, WUnderground.com, MeteoEarth

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