WWSO21 ABRF 080627
IDQ20015
Australian Bureau of Meteorology
Tropical Cyclone Warning Centre

SATELLITE ANALYSIS BULLETIN
Issued at 0627 UTC on 8 APRIL 2026
Severe Tropical Cyclone Vaianu

080600 UTC

Located near 23.3S 178.5E

Analysis based on: animated visible and IR imagery

Latitude Detection Sum: 8

Longitude Detection Sum: 21

Dvorak analysis: T3.0/3.5/W1.5/24HRS STT:W0.5/06HRS

Intensity estimate 70 knots. Intensity estimate is higher than subjective
Dvorak, and closer to objective aids. System is under strong vertical wind
shear (CIMSS assessment at 0000 UTC 27 knots). Environmental conditions for
tropical development will continue to degrade, with 11F travelling further
south over cold waters, and the structure will become more asymetric. ATMS
microwave at 0235 UTC highlights the asymetric structure, with the strongest
convection all on the southern side. This is also evident in visible satellite
imagery. Obtaining a DT is difficult shear pattern suggests less than 30nm from
the T gradient and DT =3.0. MET is 3.5 with a W+ 24 hour trend, PT adjusted to
3.0. FT based on PT and is 3.0. CI is held at 3.5. 

The next bulletin will be available 090130 UTC.