Skip Navigation Links   
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
National Hurricane Center
Local forecast by
"City, St" or "ZIP"

Alternate Formats
   Text     |   Mobile
   Email   |   RSS XML/RSS logo
   About Alternates
Cyclone Forecasts
   Latest Advisory
   Past Advisories
   About Advisories
Marine Forecasts
   Atlantic & E Pacific
   Gridded Marine
   About Marine
Tools & Data
   Satellite | Radar
   Analysis Tools
   Aircraft Recon
   GIS Datasets
   Data Archive
   Forecast Accuracy
Outreach & Education
   Storm Surge
   About Cyclones
   Cyclone Names
   Wind Scale
   Most Extreme
   Forecast Models
   Glossary | Acronyms
   Frequent Questions
Our Organization
   About NHC
   Mission & Vision
   Staff | Q&A
   Visitors | Virtual Tour
   Library Branch
   NCEP | Newsletter
Contact Us
Follow the National Hurricane Center on Facebook Follow the National Hurricane Center on Twitter
Subscribe the National Hurricane Center on YouTube Read the National Hurricane Center Inside the Eye blog on WordPress is the U.S. Government's official Web portal to all Federal, state and local government Web resources and services.

Hurricane JULIO


200 AM PDT WED AUG 06 2014

A small burst of deep convection with cloud tops of -75C to -80C has
developed over the low-level center, resulting in the formation of a
central dense overcast feature. In addition, passive microwave
satellite imagery has been indicating a 75-100 percent closed low-
to mid-level eye feature since about 0100 UTC. Satellite intensity
estimates are a consensus T4.0 from TAFB and SAB, so the initial
intensity has been increased to 65 kt, making Julio the fifth
hurricane of the 2014 eastern North Pacific season.

The initial motion estimate is 285/15 kt based on a blend of
conventional and microwave satellite fixes. The NHC model guidance
remains in excellent agreement on Julio moving along the southern
periphery of a deep-layer ridge to its north for the next 72 hours
or so. After that, a break in the ridge is forecast to develop north
of the Hawaiian Islands on Days 4 and 5, and Julio is expected to
turn more northwestward, passing just north of the Islands. However,
the new model runs, which have incorporated the 0000 UTC NOAA G-IV
jet dropsonde data are not showing as much erosion of the ridge as
in previous runs, and the response has been a slight southward shift
of the track guidance at 96 and 120 hours. The official forecast
track is just an update of the previous advisory track through 72
hours, and was shifted slightly southward after that, similar to the
consensus model TVCE, but not as far south as the ECMWF model. The
latter model brings Julio much closer to the Hawaiian Islands since
it no longer develops a break in the ridge.

The developing eye feature, low shear of less than 5 kt, and a
moistening mid-troposphere argue for at least some modest
strengthening for the next 36 hours or so as Julio moves from a SST
cold pool and over a warmer oceanic ridge. These condition also
typically favor rapid intensification, which would be a possibility,
except for the occasional intrusions of cooler and more stable air
from the north. However, it wouldn't be surprising if Julio
reaches its peak intensity a little sooner than forecast while the
upper-level outflow pattern continues to expand. By 48 hours, the
cyclone will be moving over cooler waters and into a more stable air
mass, which should induce gradual weakening. The official intensity
forecast is a little higher than the previous advisory and the
consensus model ICON.


INIT  06/0900Z 14.8N 129.0W   65 KT  75 MPH
 12H  06/1800Z 15.4N 131.4W   70 KT  80 MPH
 24H  07/0600Z 16.1N 134.5W   75 KT  85 MPH
 36H  07/1800Z 16.7N 137.5W   80 KT  90 MPH
 48H  08/0600Z 17.3N 140.4W   75 KT  85 MPH
 72H  09/0600Z 18.5N 145.9W   65 KT  75 MPH
 96H  10/0600Z 20.4N 151.1W   55 KT  65 MPH
120H  11/0600Z 23.0N 156.0W   50 KT  60 MPH

Forecaster Stewart


Quick Navigation Links:
Tropical Cyclone Forecasts  -  Tropical Marine Forecasts  -  Data Archive
Outreach  -  Prepare  -  About Cyclones  -  About NHC  -  Contact Us

NOAA/ National Weather Service
National Centers for Environmental Prediction
National Hurricane Center
11691 SW 17th Street
Miami, Florida 33165 USA
Information Quality
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities
Page last modified: Wednesday, 31-Dec-2014 12:09:37 UTC