Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 303 AM EST Thu Mar 10 2022 Valid 00Z Fri Mar 11 2022 - 00Z Fri Mar 18 2022 Surface high pressure building north of the region should keep the overall pattern across Hawaii fairly stable and dry over the next week with moderate to breezy trade winds (especially by the middle of next week). The exception may be some instability associated with an upper shortwave to the southeast, enhancing thunderstorm activity some over the Big Island through this week. The upper trough should push away from Hawaii by this weekend as stronger upper ridging moves in. Santorelli