ZCZC MIATCDEP4 ALL TTAA00 KNHC DDHHMM TROPICAL DEPRESSION FOUR-E DISCUSSION NUMBER 1 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 8 PM PDT SUN JUL 18 2004 THE LOW PRESSURE SYSTEM LOCATED ABOUT 600 MILES SOUTH-SOUTHWEST OF THE SOUTHERN TIP OF BAJA CALIFORNIA HAS BEEN UPGRADED TO A TROPICAL DEPRESSION. THE UPGRADE IS BASED ON SATELLITE INTENSITY ESTIMATES OF 30 KTS FROM BOTH TAFB AND SAB. THE SYSTEM HAS A GOOD LOW LEVEL CIRCULATION WITH MOST OF THE DEEP CONVECTION LOCATED IN THE WESTERN SEMI-CIRCLE. THE SATELLITE METEOROLOGISTS ALSO NOTED THE STRONG OUTFLOW TOWARD THE NORTH. THE SYSTEM IS CURRENTLY ON THE SOUTHEAST SIDE OF A HIGH PRESSURE SYSTEM AND IS EXPECTED TO BE STEERED WESTWARD ON THE SOUTH SIDE OF THIS HIGH. THE INITIAL MOTION IS 270/09. ALL OF THE GLOBAL MODEL GUIDANCE MOVES THE SYSTEM WESTWARD...WHILE THE STATISTICAL AND STATISTICAL-DYNAMICAL MODELS ARE A LITTLE NORTH OF DUE WEST. THE OFFICIAL TRACK CLOSELY FOLLOWS THE GFS SOLUTION. THE DEPRESSION IS CURRENTLY IN A LOW SHEER ENVIRONMENT AND IS OVER WARM SSTS. SHIPS GUIDANCE TAKES THE SYSTEM TO A 60 KT TROPICAL STORM IN TWO TO THREE DAYS. HOWEVER...SATELLITE PHOTOS SHOW STRATO-CUMULUS CLOUDS TO THE WEST OF THE SYSTEM AND THIS AIR WILL BE ENTRAINED INTO THE SYSTEM AS IT MOVES WESTWARD. THEREFORE...THE OFFICIAL FORECAST IS NOT AS AGGRESSIVE AS THE SHIPS. FORECASTER JARVINEN FORECAST POSITIONS AND MAX WINDS INITIAL 19/0300Z 14.4N 113.7W 30 KT 12HR VT 19/1200Z 14.5N 115.2W 35 KT 24HR VT 20/0000Z 14.6N 117.3W 40 KT 36HR VT 20/1200Z 14.7N 119.4W 45 KT 48HR VT 21/0000Z 14.8N 121.9W 50 KT 72HR VT 22/0000Z 15.0N 127.0W 50 KT 96HR VT 23/0000Z 15.1N 132.0W 50 KT 120HR VT 24/0000Z 15.2N 136.9W 50 KT $$ NNNN
Alternate Formats
About Alternates -
E-Mail Advisories -
RSS Feeds
Cyclone Forecasts
Latest Advisory -
Past Advisories -
About Advisories
Marine Forecasts
Latest Products -
About Marine Products
Tools & Data
Satellite Imagery -
US Weather Radar -
Aircraft Recon -
Local Data Archive -
Forecast Verification -
Deadliest/Costliest/Most Intense
Learn About Hurricanes
Storm Names
Wind Scale -
Prepare -
Climatology -
NHC Glossary -
NHC Acronyms -
Frequently Asked Questions -
AOML Hurricane-Research Division
About Us
About NHC -
Mission/Vision -
Other NCEP Centers -
NHC Staff -
Visitor Information -
NHC Library
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
Privacy Policy
Credits
About Us
Glossary
Career Opportunities
Page last modified: Monday, 19-Jul-2004 02:32:22 UTC