Since the previous advisory, Bertha intensified from 80kts (CAT1) to 100kts now (CAT3). The estimated minimum sea level pressure is 948mb, or 27mb lower than six hours ago!
This type of "Cape Verde storm" is atypical so early in the season. They happen, but this one stands out as being the easternmost formation prior to August 1. This would indicate a generally active season is in the making, since SST and shear are already favorable in this classically Aug-Sep formation zone.
Bermuda should still be keeping a close eye on this hurricane as the week progresses.
Please visit my tropical Atlantic headquarters.
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