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 Cent
er on Facebook Follow the National Hurricane Center on Twitter
FirstGov.gov is the U.S. Government's official Web portal to all Federal, state and local government Web resources and services.
 
 

Tropical Storm GENEVIEVE


ZCZC MIATCDEP3 ALL
TTAA00 KNHC DDHHMM
TROPICAL STORM GENEVIEVE DISCUSSION NUMBER   7
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL   EP082008
800 PM PDT TUE JUL 22 2008
 
GENEVIEVE CONTINUES TO SLOWLY STRENGTHEN IN THE FACE OF MODERATE
EASTERLY SHEAR.  THE INITIAL INTENSITY IS RAISED TO 55 KT BASED ON
UNANIMOUS SUBJECTIVE AND OBJECTIVE DVORAK SATELLITE CLASSIFICATIONS. 
MULTIPLE FACTORS COMPLICATE THE INTENSITY FORECAST.  ON ONE
HAND...VERTICAL SHEAR IS EXPECTED TO WEAKEN DURING THE NEXT 12 TO
24 HOURS AND ALL OF THE INTENSITY GUIDANCE SHOWS STRENGTHENING.
HOWEVER...SATELLITE BASED SST ESTIMATES INDICATE THAT THE CYCLONE
IS ABOUT TO MOVE OVER A COLD WAKE GENERATED BY FAUSTO. WHILE THE
POCKET OF COOLER WATER IS NOT THAT LARGE...IT COULD SLOW OR EVEN
STOP DEVELOPMENT IN THE SHORT-TERM. BEYOND 24 HOURS...GENEVIEVE
SHOULD BE BACK OVER SUFFICIENTLY WARM WATERS WHERE IT WILL HAVE
ABOUT A 48 HOUR WINDOW TO STRENGTHEN BEFORE SHEAR INCREASES AGAIN.
IN LIGHT OF THE AFOREMENTIONED COLD WAKE...THE OFFICIAL FORECAST IS
BELOW THE INTENSITY MODEL CONSENSUS EARLY IN THE FORECAST.
 
GENEVIEVE CONTINUES WESTWARD AT ABOUT 10 KT UNDER THE INFLUENCE OF A
MIDDLE TO UPPER LEVEL RIDGE OVER NORTHERN MEXICO.  WHILE DYNAMICAL
MODELS GENERALLY AGREE THAT THIS RIDGE WILL NOSE WESTWARD INTO THE
EASTERN PACIFIC...THEY DISAGREE ON THE STRENGTH OF THE RIDGE.
ADDITIONALLY...THE VARIOUS MODELS DIFFER IN THEIR FORECASTS OF THE
STRENGTH AND DEPTH OF THE CYCLONE.  THOSE MODEL DEPICTING A WEAK
SYSTEM MOVE IT SOUTHWESTWARD WHILE THOSE MODELS WHICH DEPICT A
STRONG SYSTEM TURN THE CYCLONE WEST-NORTHWESTWARD OR NORTHWESTWARD.
ALL THIS RESULTS IN A HUGE DIVERGENCE OF THE TRACK MODELS BEYOND A
DAY OR SO.  IN FACT...THE TRACK MODEL ENVELOPE SPANS APPROXIMATELY
1000 MILES AT DAY 5.  GIVEN THE EXTREME UNCERTAINTY...THE OFFICIAL
FORECAST MAINTAINS A DUE WESTWARD MOTION THROUGH 5 DAYS.  THIS
RESULTS IN A SLIGHT NORTHWARD SHIFT OF THE NEW OFFICIAL TRACK
FORECAST BUT IT STILL LIES SIGNIFICANTLY SOUTH OF THE DYNAMICAL
MODEL CONSENSUS.
 
FORECAST POSITIONS AND MAX WINDS
 
INITIAL      23/0300Z 14.3N 108.2W    55 KT
 12HR VT     23/1200Z 14.4N 109.7W    55 KT
 24HR VT     24/0000Z 14.4N 111.3W    60 KT
 36HR VT     24/1200Z 14.4N 112.8W    65 KT
 48HR VT     25/0000Z 14.4N 114.2W    65 KT
 72HR VT     26/0000Z 14.4N 117.2W    65 KT
 96HR VT     27/0000Z 14.5N 120.0W    55 KT
120HR VT     28/0000Z 14.5N 123.5W    45 KT
 
$$
FORECASTER RHOME
 
NNNN


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 33165-2149 USA
nhcwebmaster@noaa.gov
Disclaimer
Credits
Information Quality
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities
Page last modified: Tuesday, 21-Apr-2009 12:09:37 UTC