247
FXHW01 KWNH 190729
PMDHI

Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
229 AM EST Wed Nov 19 2025

Valid 00Z Thu 20 Nov 2025 - 00Z Thu 27 Nov 2025

...Wet pattern developing over the islands...

Guidance mass field solutions remain reasonably well clustered
for much of the upcoming week, bolstering forecast confidence.
Tropical moisture is lifting over the state, especially the
eastern islands, as troughing at the surface and aloft settles
over/southwest of the state along with a slow frontal approach
from the northwest. This fuels chances for enhanced island
downpours with focus today into Thursday. Trades and an
increasing windward terrain rain pattern focus should uptick
through mid-late week as renewed high pressure bridges to the
north of the state. Later, less certain upstream upper trough and
frontal approach by Sunday may renew leading moisture return and
rainfall potential in disrupted trades prior to system passage
into early next week that may act to then ease moisture/showers.

Schichtel

$$