Tropical moisture from Howard expected to arrive this weekend

Water vapor satellite imagery from 430pm HST.

With showers from former Tropical Cyclone Frank breaking up and moving to the west today, our forecast focus turns towards another remnant, Howard moving in from the east. Models show tropical moisture from Howard is expected to arrive late in the day Saturday, and will track across the state through Monday. An upper low is expected to dig down towards the state from the northwest on Sunday night and Monday and destabilize the atmosphere while this moisture moves over us. Thus, we are anticipating the potential for heavy rain and thunderstorms during this Sunday night-Monday time frame (possibly including daytime Sunday). Grounds are already saturated with recent rains, so it would take less than usual to cause flooding issues. As we saw with the Darby, flash flooding, lightning and hazardous surf are hazards not to be taken lightly (tropical storm or not). Tropical Storm Ivette is still about 1800 miles away and Hawaii lies beyond the 5 day forecast cone…still a bit early to speculate on impacts, if any.

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