FXHW01 KWNH 210626

PMDHI 



Hawaii Extended Forecast Discussion

NWS Weather Prediction Center College Park MD

226 AM EDT Sat Mar 21 2026



Valid 00Z Sun 22 Mar 2026 - 00Z Sun 29 Mar 2026



...Unwelcome wet pattern to continue into Monday across 

Hawai'i...



An 850mb low to the north is working in tandem with low level

ridging east of Hawai'i to maintain a steadfast SWrly low-level

flow regime across Hawaii today and through Monday. PWATs remain 

above the 99th climatological percentile and the islands are 

placed favorably beneath diffluent 250-500mb winds. Combined with 

favorable upslope ascent into the islands terrain, excessive 

rainfall rates will unfortunately remain in the forecast through 

the remainder of the weekend and into the first half of next week.

With soils overly saturated and flooding still ongoing, Hawaii 

remains vulnerable to additional life-threatening flash flooding 

and landslides through the first half of next week.



As surface ridging begins to build in Tuesday onward to the north

and northeast, the anomalous moisture plume will advance north 

and east as well. This is will finally bring a much need tranquil 

period of weather for clean up efforts for the second half of next

week.





Mullinax