| HOME | ARCHIVES | FORECASTS | IMAGERY | ABOUT NHC | RECONNAISSANCE |

Tropical Storm ISELLE (Text)


ZCZC MIATCDEP5 ALL
TTAA00 KNHC DDHHMM
TROPICAL STORM ISELLE DISCUSSION NUMBER  10
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL   EP102008
200 PM PDT FRI AUG 15 2008
 
ISELLE'S CONVECTIVE PATTERN HAS CONTINUED TO DETERIORATE TODAY DUE
TO MODERATE TO STRONG EASTERLY UPPER-LEVEL SHEAR. HOWEVER...A
15/1316Z QUIKSCAT OVERPASS INDICATED SOME CREDIBLE 35- TO 40-KT
SURFACE WINDS IN THE SOUTHERN SEMICIRCLE. THEREFORE...THE INITIAL
INTENSITY IS BEING MAINTAINED AT 35 KT SINCE THERE IS STILL SOME
CONVECTION PRESENT IN THE SOUTHWESTERN QUADRANT. THE 34-KT WIND
RADII HAVE ALSO BEEN LIMITED TO ONLY THE SOUTHWESTERN QUADRANT
BASED ON THE QUIKSCAT WIND DATA AND CURRENT CONVECTIVE PATTERN.
 
VISIBLE SATELLITE IMAGERY SUGGESTS THAT THE MOSTLY-EXPOSED LOW-LEVEL
CIRCULATION HAS BEEN NEARLY STATIONARY FOR THE PAST 12 HOURS OR SO.
HOWEVER...ALL NHC MODEL GUIDANCE INDICATES THAT A SLOW
WEST-NORTHWEST OR WESTWARD MOTION IS EXPECTED TO RESUME DURING THE
NEXT 12 HOURS AND CONTINUE THROUGHOUT THE FORECAST PERIOD. THE
OFFICIAL FORECAST IS SIMILAR TO THE PREVIOUS FORECAST TRACK AND A
LITTLE SOUTH OF THE NHC MODEL CONSENSUS.
 
ALTHOUGH THE UPPER-LEVEL FLOW REMAINS DIFLUENT...20- TO 30-KT WINDS
OVERSPREADING THE CYCLONE HAS CREATED MODERATE TO STRONG VERTICAL
WIND SHEAR CONDITIONS. ALL AVAILABLE GUIDANCE SUGGESTS THAT THESE
UNFAVORABLE UPPER-LEVEL WINDS WILL SLOWLY INCREASE THROUGHOUT THE
FORECAST PERIOD...WHICH SHOULD INDUCE GRADUAL WEAKENING DURING THE
NEXT 12 TO 24 HOURS.

 
FORECAST POSITIONS AND MAX WINDS
 
INITIAL      15/2100Z 17.6N 111.2W    35 KT
 12HR VT     16/0600Z 17.8N 111.8W    35 KT
 24HR VT     16/1800Z 18.0N 112.4W    30 KT
 36HR VT     17/0600Z 18.1N 113.2W    30 KT
 48HR VT     17/1800Z 18.3N 114.1W    25 KT...REMNANT LOW
 72HR VT     18/1800Z 18.5N 116.0W    20 KT...REMNANT LOW
 96HR VT     19/1800Z 18.5N 118.0W    20 KT...REMNANT LOW
120HR VT     20/1800Z 18.5N 119.5W    20 KT...REMNANT LOW
 
$$
FORECASTER STEWART/BEVEN
 
NNNN

Standard version of this page

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

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
Privacy Policy
Credits
About Us
Glossary
Career Opportunities
Page last modified: Tuesday, 21-Apr-2009 12:09:40 UTC