PEWA (01C) + UNALA (02C) + 92C…

The ocean is active near the Dateline…

01C, 02C and 92C, IR 2013-08-17 1132Z (from NOAA)

01C, 02C and 92C, IR 2013-08-17 1132Z (from NOAA)

ECMWF expects a steady NWward motion (from ECMWF)

ECMWF expects a steady NWward motion (from ECMWF)

Severe Tropical Storm PEWA (T1313/01C) is moving northwest to the west of the Dateline… near 15N 177E… PEWA experienced a period of intensification 12 hours ago… A small eye was visible in this morning’s VIS image… Convection weakened and the eye collapsed in the afternoon and the evening… Latest IR image revealed that the centre may be partially exposed to the south…

Environmental conditions along the forecast track are still favourable for development… PEWA should gain strength and become a Typhoon a couple of days later…

The storm will continue to move northwest in the coming few days… It should pass northeast of Wake Island on Wednesday… STS PEWA is not a threat to any populated area in the near future…

Some 35kts vectors observed in ASCAT descending pass in the early morning (from NOAA)

Some 35kts vectors observed in ASCAT descending pass in the early morning (from NOAA)

To the northeast of PEWA… 90C finally developed into a Tropical Cyclone in the morning… Hawaii upgraded it to Tropical Storm UNALA (02C) as ASCAT scan showed some 35 kts vectors to the north of its exposed centre… UNALA weakened this afternoon as it crossed the Dateline and approached PEWA… The outflow of PEWA will prevent UNALA from strengthening… UNALA may dissipate within 24 hours…

Further to the east… Tropical Disturbance 92C is moving westward near 17N 173E… Recent satelite animation shows convection persist over the low level circulation centre… This system may become a Tropical Depression later…

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