Skip Navigation Links 
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
The Weather Prediction Center



Follow the Weather Prediction Center on Facebook Follow the Weather Prediction Center on Twitter
NCEP Quarterly Newsletter
WPC Home
Analyses and Forecasts
   National High & Low
   WPC Discussions
   Surface Analysis
   Days ½-2½ CONUS
   Days 3-7 CONUS
   Days 4-8 Alaska
   Flood Outlook
   Winter Weather
   Storm Summaries
   Heat Index
   Tropical Products
   Daily Weather Map
   GIS Products
Current Watches/

Satellite and Radar Imagery
   Satellite Images
   National Radar
Product Archive
WPC Verification
   Medium Range
   Model Diagnostics
   Event Reviews
   Winter Weather
International Desks
Development and Training
WPC Overview
   About the WPC
   WPC History
   Other Sites
Meteorological Calculators
Contact Us
   About Our Site is the U.S. Government's official web portal to all federal, state, and local government web resources and services.
Hawaii Extended Forecast Discussion
(Latest Discussion - Issued 1214Z Jan 16, 2018)
Version Selection
Versions back from latest:  0   1   2   3   4   5   6   7   8   9   10   
Abbreviations and acronyms used in this product

Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
714 AM EST Tue Jan 16 2018

Valid 00Z Wed Jan 17 2018 - 00Z Wed Jan 24 2018

Upper ridging is forecast to remain in control for most of the
next seven days over Hawai'i as one trough to the north slides
eastward this week. A weak front may push through early Thursday
with perhaps some briefly enhanced but generally limited shower
activity but ensembles show an increase in precipitable water
values from Friday onward as a sfc high moves eastward along 35N.
This increase in pressure gradient will increase trades over the
next few days with a decrease starting this weekend. Windward and
mauka showers are expected (with some leeward spillover) over the
next several days. By next week, ensembles were in good agreement
in digging a trough to the northwest of the area and the
deterministic GFS/ECMWF show an upper low dipping below 40N near
170W. This will act to lower heights across Hawai'i but maintain a
windward trade pattern with generally light showers.