Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
226 AM EDT Sat Aug 15 2026

Valid 00Z Sun 16 Aug 2026 - 00Z Sun 23 Aug 2026

Tropical Storm Lala continues to move on a west-northwest heading
towards the Big Island of Hawaii this evening with its positioning
currently around 17.7N, 153.0W as of the latest update. For more
information on TS Lala and expected impacts from the tropical
cyclone, please visit the National Hurricane Center for the latest
on the storm as it makes headway towards the island chain.

Timing of the most impactful period from Lala will occur on 
Saturday with the backside of the storm still likely to maintain
trailing bands in its wake before finally ceasing as we step into
Monday. Beyond the weekend, expecting a return to a predominant
northeast trade wind setup with passing showers on the windward
side of the islands leading to additional rainfall over top what
will be very saturated grounds in wake of Lala. The next several
days will provide heightened threats of flash flooding compared to
normal, so please be sure to monitor the local forecast from the
Honolulu WFO for the latest.

Another potential tropical cyclone could develop well downstream
of the island chain by the end of the period with current ensemble
means indicating another surface low with a westerly trajectory
over the Eastern Pacific that could end up being something to
monitor for the extended. This is a very fluid situation, but as
the Eastern Pacific remains active, the threat for future impacts
remains valid.

Kleebauer