What say ye about Isaac?
Argh. I had a decent post put together and my browser bombed. I don't mind work but I HATE rework...
When a storm is this far out, it’s not particularly useful to predict exact tracks so I usually take a look at some macro-analysis tools. Here’s a good one that plots most of the trust-worthy computer models. It gives you an idea of the bounding parameters of potential centered on the mean.
http://www.ral.ucar.edu/hurricanes/realtime/plots/northatlantic/2012/al092012/track_early/aal09_2012082412_track_early.pngI like this tool, maybe a little better. It’s a combo plot from the NOA Earth System Research Lab that plots the two most trusted models (GFS and Euro) and their ensemble members along with the potential error ellipse:
http://www.esrl.noaa.gov/psd/forecasts/gfsenkf/ens/2012082400/ellipses_2012082400_09L.gifIn addition to the track guidance, this far out, I do the same macro-analysis for intensity. Here’s a good tool:
http://www.ral.ucar.edu/hurricanes/realtime/plots/northatlantic/2012/al092012/intensity_early/aal09_2012082412_intensity_early.pngAs you can see, none of the models bring the thing to a major hurricane and almost half do not even attain hurricane status.
I have nothing but respect for the NHC guys but they are quite bullish on the storm. They bring the thing up to 80mph as it comes ashore near Pensacola.
http://www.nhc.noaa.gov/refresh/graphics_at4+shtml/150135.shtml?5-daynl?large#contentsI have a hard time believing this. Even though the storm is initializing well (it’s up to 60mph now), it has some difficult terrain ahead of it. The land interaction is disrupting the convergent moisture feed in the boundary layer and is disrupting the vorticity structure lee of the topography. The storm has a challenge with vertical stretching of the vortex column lee of the topography and deflected to the right due to the coriolis affect. You can see this well in this vorticity plot:
http://tropic.ssec.wisc.edu/real-time/atlantic/winds/wg8vor.GIFIt's that small area of green (low vorticity) just ahead of the storm.
Just because it’s pretty, here’s a good pic of Isaac from today. Very nice outflow at the upper levels but the lower and mid levels are still very disorganized:
http://www.nnvl.noaa.gov/images/high_resolution/1157v1_20120824-IssacA.pngHere’s a pic from the NOAA hurricane hunter research mission from yesterday evening. Nice day for a flight:
https://p.twimg.com/A1B9akDCMAA5seJ.jpgEven though the storm is still in its formative stages, there is still some research value in analyzing the storm for cyclogenesis studies. GOES-14, the latest geostationary weather satellite that is in orbital storage until ops begin next year was placed into super rapid scan operations this morning to take a peek at Isaac. The images in this loop were taken every 1 minute for a two hour period. You get a real sense of a storm as a living, breathing thing when viewed like this. Take care clicking the link, it’s 45mb. It’s worth taking a look if you can:
http://cimss.ssec.wisc.edu/goes/blog/wp-content/uploads/2012/08/Isaac_GOES14_SRSO_24Aug2012_1145_1340.gifAnd, completely unrelated, here’s a link to a radar image of Typhoon Tembin as it came ashore in Taiwan, raw data compliments of their Central Weather Bureau:
https://yvu0og.blu.livefilestore.com/y1pIYluYeQGgdKQbUw79kNkMO-YvMcJR_zY3-__E1bL7TQpWSOucKlVUHlmVdmf9QL1w1LsZPwEaVgZbl_8W7PdNChJQgAlVFzI/Tembin%20Full.gifCareful, it’s 31mb. I don’t expect Isaac to be anything like this…