Skip Navigation Links weather.gov 
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
   QPF
   PQPF
   Flood Outlook
   Winter Weather
   Storm Summaries
   Heat Index
   Tropical Products
   Daily Weather Map
   GIS Products
Current Watches/
Warnings

Satellite and Radar Imagery
   Satellite Images
   National Radar
Product Archive
WPC Verification
   QPF
   Medium Range
   Model Diagnostics
   Event Reviews
International Desks
Development and Training
   Development
WPC Overview
   About the WPC
   Staff
   WPC History
   Accomplishments
   Other Sites
   FAQs
Meteorological Calculators
Contact Us
   About Our Site
 
USA.gov 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 1221Z Jan 17, 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
721 AM EST Sat Jan 17 2015

Valid 00Z Sun Jan 18 2015 - 00Z Sun Jan 25 2015

A main mid-latitude storm track remains channeled north of the
state overtop an east-west oriented mid-upper level ridge centered
over the west-central Pacific southwest of the Hawaiian Islands.
Trades remain generally disrupted in this pattern over much of the
next week.

Model and ensemble forecast spread and uncertainty is still quite
low over the next week, so predictability looks good using a
preferred composite model and ensemble blend to smooth any of the
rougher smaller scale details.

Current passage of impulses energy aloft supported surface frontal
system and shower approach into the western islands. The stalled
front should gradually weaken over the weekend. Significant
Pacific flow amplification, including development of a strong
mid-upper level trough to the northwest of the state, is still
expected to force a second frontal approach into the state
starting Friday. This amplified system offers increased potential
for the return of deeper lead moisture inflow across the state to
fuel some heavier frontal/pre-frontal rains

Schichtel