Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
347 AM EDT Mon Jun 14 2021

Valid 00Z Tue Jun 15 2021 - 00Z Tue Jun 22 2021

Today's guidance offers good agreement and continuity with most
aspects of the forecast.  Trades will be moderate to brisk as high
pressure currently north of the state positions itself over the
eastern Pacific from Wednesday onward.  Primarily
windward/mountain-focused showers should increase somewhat
compared to the start of the week as one band of moisture brushes
the northwestern islands around Tuesday-Wednesday and another area
of moisture passes through from east to west mid-late week, while
an upper weakness/low settles over the area Tuesday or Wednesday
onward.  Guidance consensus shows precipitable water values
decreasing a bit by the weekend, to near or even slightly below
normal.  There are some differences for another area of moisture
that could approach the area by next Monday.  The 00Z GFS is the
most enthusiastic in bringing enhanced moisture to at least the
Big Island on Monday.  Other solutions vary in the specifics but
are some combination of slower and/or more suppressed with this
moisture.

Rausch