Cloud Patterns in Subtropical Cyclones / Hybrid Systems

•Hebert / Poteat (H/P) Technique (..continued..)

•ST 3.5 (55-60 knots max sustained winds)

–Deep layer convection (frequently with dense overcast) is evident in band(s) 1 to 3 degrees latitude (60 - 180 nm) from LLCC (NO CENTRAL DENSE OVERCAST!).

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–The outer, eastern convective band (5 to 10 degrees latitude from the LLCC) is weaker than the day before, but a new band may be forming to the west.

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–For systems moving rapidly eastward, there may be only a dense overcast ( > 3 degrees latitude) about 2 to 4 degrees east of the LLCC

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–If the system meets the requirements of any of the above statements, then the intensity is ST 3.5

Cloud Patterns in Subtropical Cyclones / Hybrid Systems