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
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
   Audio/Podcasts
   About Advisories
Marine Forecasts
   Atlantic & E Pacific
   Gridded Marine
   About Marine
Tools & Data
   Satellite | Radar
   Analysis Tools
   Aircraft Recon
   GIS Datasets
   Data Archive
Development
   Experimental
   Research
   Forecast Accuracy
Outreach & Education
   Prepare
   Storm Surge
   About Cyclones
   Cyclone Names
   Wind Scale
   Most Extreme
   Forecast Models
   Breakpoints
   Resources
   Glossary | Acronyms
   Frequent Questions
Our Organization
   About NHC
   Mission & Vision
   Staff | Q&A
   Visitors | Virtual Tour
   Library Branch
   NCEP | Newsletter
Contact Us
   Comments
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
FirstGov.gov is the U.S. Government's official Web portal to all Federal, state and local government Web resources and services.
 
 

Tropical Storm POLO Forecast Discussion


Home   Public Adv   Fcst Adv   Discussion   Wind Probs   Graphics   Archive  


000
WTPZ42 KNHC 182038
TCDEP2

TROPICAL STORM POLO DISCUSSION NUMBER  11
NWS NATIONAL HURRICANE CENTER MIAMI FL       EP172014
200 PM PDT THU SEP 18 2014

An Air Force reconnaissance plane just traversed the core of Polo,
and although a dropsonde measured a pressure of 983 mb with 25 kt
winds in the center, neither the flight-level nor SFMR-winds in any
quadrant support keeping Polo at hurricane intensity. The
maximum winds have been lowered to 60 kt in this advisory. This
is also reflected in the cloud pattern, which has become a little
bit disrupted in the past few hours. Polo had the opportunity to
strengthen, but it appears that the northeasterly shear increased
earlier than anticipated, halting the intensification. Little
change in strength is expected for the next 12 hours or so, but
a gradual weakening trend is forecast to begin in 24 hours, as
indicated by most of the guidance.

There is no change in the forecast track, and as in previous runs,
most of the guidance maintains Polo moving toward the northwest or
west-northwest around the periphery of an amplifying mid-level ridge
centered over Mexico. On the forecast track, the cyclone will pass
well south of the southwestern coast of Mexico and well south of the
southern Baja California peninsula.  The confidence in the track
forecast is relatively high since both the multi-model consensus
TVCN and the average of the GFS and the ECMWF models, GFEX, are
keeping Polo well removed from land.  However, any unexpected
deviation to the right of the track could require the issuance of a
tropical storm watch for the southern portion of the Baja
California peninsula.

FORECAST POSITIONS AND MAX WINDS

INIT  18/2100Z 17.8N 105.9W   60 KT  70 MPH
 12H  19/0600Z 18.5N 106.7W   60 KT  70 MPH
 24H  19/1800Z 19.2N 107.6W   55 KT  65 MPH
 36H  20/0600Z 20.0N 108.5W   50 KT  60 MPH
 48H  20/1800Z 20.8N 110.0W   45 KT  50 MPH
 72H  21/1800Z 21.5N 112.5W   40 KT  45 MPH
 96H  22/1800Z 22.0N 115.0W   30 KT  35 MPH
120H  23/1800Z 22.0N 117.0W   25 KT  30 MPH...POST-TROP/EXTRATROP

$$
Forecaster Avila




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
nhcwebmaster@noaa.gov
Disclaimer
Credits
Information Quality
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities
Page last modified: Thursday, 18-Sep-2014 20:38:28 UTC