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
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
(Caution: Version displayed is not the latest version. - Issued 1225Z Feb 20, 2015)
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
725 AM EST Fri Feb 20 2015

Valid 00Z Sat Feb 21 2015 - 00Z Sat Feb 28 2015

The latest models and ensembles still reasonably agree that an
amplified mid-upper level trough now passing to the north of the
state is supporting a trailing surface frontal push into the
islands today. This front and modest moisture/shower focus will
gradually diminish over the weekend.

Pacific flow amplification next week should slow the next main
upstream mid-upper level trough to the northwest of the islands. A
favored guidance composite indicates that an associated frontal
system advances into the state late next week leading to pooled
moisture and organized showers working into the west-central
islands. This occurs as an amplified downstream mid-upper level
ridge settles to the northeast of the Hawaiian Islands. This ridge
may begin to be undercut by a lower latitide closed low that
guidance shows should prove slow to approach the Big Island from
the east-southeast late next week...but may get into close enough
proximity in about 7/8 days.