Archive for the ‘Tropical Storm Irene’ Category

IRENE – 8-21-2011 SPAGHETTI CHART

THIS IS A TIME-SENSITIVE POSTING SUBMITTED 8-21-2011 AFTER 11 PM EASTERN TIME.

IT IS NOW OUT OF DATE.  PLEASE CLICK ON THE BLOG TAB AT THE TOP LEFT OF THIS PAGE AND SCROLL DOWN TO LOOK FOR A MORE RECENT REPORT ON THIS STORM WHICH IS NOW A SERIOUS HURRICANE (posted 8-22-2011 near midnight EDT).

Invest (investigation) 97L (or 97AL) has become Tropical Storm Irene.  My concerns for Florida remain and it looks to me as though the east coast is the part of Florida most likely to be influenced by the system.  If it does skirt the coast at least that region will be subjected to the left-hand leading quadrant which is almost always less powerful than the right-hand leading quadrant.  Based upon my observation of the ECMWF (European Centre for Medium-Range Weather Forecasting) model  – it now looks as though South Carolina could very well be the landfall site.  Of course many changes can occur over the next few days and much depends upon the movement and strength of a trough dipping down over the Eastern U.S.A.  One of my favorite sources, Dr. Jeff Masters wrote yesterday:

“The best model for predicting the timing and strength of such troughs over the past two years has been the ECMWF (European Center model).  The European Center does not permit public display of tropical storm positions from their hurricane tracking module of their model, so we are unable to put ECMWF forecasts on our computer model forecast page that plots positions from the other major models.  Remember that a 7-day forecast by even our best model will be off by an average of over 700 miles, so it is too early to tell what part of the U.S. might be most at risk from a strike by 97L. This weekend would be a good time to go over your hurricane preparation.”

In the future, if you wish to view the ECMWF model loops go to the right of this page and under the heading of  “Tropical Weather” click on the link to Penn. State U. Models Page.  Scroll down until you find it.

Here is Jonathan Vigh’s spaghetti chart effort releases at 8 pm Eastern Time, 8-21-2011.

TWO LEFT CLICKS WILL ENLARGE THIS FULLY FOR YOU