Archive for August 29th, 2016|Daily archive page

Update On Tropical Depression Nine (AL09) 8-29-2016, 10:30 pm EST

Compare this to the previous posting which was 24 hours earlier and you will see some change in the tracking model forecasts – which is to be expected.

I have greatest confidence in the TVCA run which is a consensus of 5 other models which have been good performers over the last few years.  Generally, the TVCA model is very close to the National Hurricane Center’s “official” track that is the basis for the “uncertainty” cones released to the public.  If you are one to pay attention to which models get mentioned or shown in weather reports you have surely heard of the “European model” which is labeled ECMWF.  You won’t find it on these spaghetti illustrations; Data from this model is restricted from being redistributed according to international agreement.   However, the National Weather Service official track runs very close to being the same as the ECMWF.  The BAMM and related models are still useful for long term runs but in this case I think you can pretty much ignore them (the ones that run off toward the west). 

Suppose you lived along the Nature Coast of Florida, (e.g. Citrus County) then you might feel that you have nothing to be concerned about because the tracks seem to be shifting northward.  But please remember, these tracks are merely forecasting the storm’s center.  In most cases the strongest winds are at the right hand, leading quadrant of such storms, which, in this case might cause Citrus County some concerns. 

Please be sure to click on the graphic for enlargement.

 

2016-8-30 L 0000z

Invest 99L Has Become Tropical Depression AL09

REMINDER:  THIS IS A TIME-SENSITIVE REPORT

As of late this afternoon, 8-29-2016, Invest 99L has strengthened to a tropical depression.  For up-to-date information on the system, I recommend Dr. Jeff Masters’ weblog (blog).  See link below:

https://www.wunderground.com/

Go to the top of the page and click on News & Blogs.

As of the time of this writing, Dr. Masters expresses reasonable confidence that the system will track in such a way that a landfall will occur somewhere in the Florida coast north of Tampa.  I urge all interested persons to pay close attention to Dr. Masters’ postings, the Weather Channel tropical reports, and your local news.

Here is the most recent version from my favorite spaghetti chart source, the National Center for Atmospheric Research in Boulder, Colorado (CLICK ON IMAGE TO ENLARGE):

2016-8-29 Model tracks