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
   Air Quality
   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 1218Z Oct 15, 2014)
 
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
818 AM EDT Wed Oct 15 2014

Valid 00Z Thu Oct 16 2014 - 00Z Thu Oct 23 2014

...Tropical Storm Ana to affect Hawai'i starting late Friday...

Note... The Central Pacific Hurricane Center is issuing advisories
on Tropical Storm Ana. Please consult their advisories for the
latest information.

Upper ridging will linger to the northeast of Hawai'i for the next
couple days as surface high pressure weakens, allowing the trades
to slacken Thursday. By Friday, tropical storm Ana is forecast to
approach the Big Island from the southeast, passing near or over
the island chain this weekend. The models remain in rather good
agreement taking the center just to the west of the islands, with
winds veering east-northeast to south-southeast during the period
based on the forecast track. With abudant tropical moisture likely
to overtake the islands, rainfall totals could be heavy
(especially in terrain-enhanced areas).

Ana should pull away to the northwest of the 50th state early next
week, allowing drier air to push in from the east. However, it is
unclear if the weakening system will try to curve back to the
northeast (north of the islands), which will keep elevated PW
values over most of the region or continue to the northwest or
north. Ensembles are split, likely due to timing differences in
the north Pacific. Rainfall may linger into midweek over at least
Kauai.


Fracasso