Grading NHC's Tropical Weather Outlook
The National Hurricane Center's Tropical Weather Outlook (TWO) is a text-only product that rates the potential of disturbed areas of weather to turn into tropical depressions or tropical storms. The outlooks are issued four times daily, at 5am, 11am, 5pm, and 11pm EDT. I've found them to be an excellent guide to what to watch out for. But how accurate are these outlooks? To find out, Jamie Rhome and Dan Brown, who are two of the hurricane specialists that write the Tropical Weather Outlook, verified the accuracy of all the outlooks issued in 2005 and 2006. They used a three-tiered classification of threat based on the following language appearing in the TWO:
High: "A tropical depression could form tonight or the next day."
Medium: "Some slow development is possible."
Low: "Tropical storm formation is not expected."
These forecasts were then graded by looking at the "best track" database of Atlantic hurricanes and seeing if a tropical depression formed within 48 hours of each TWO issued. The results, shown below, reveal that for the Atlantic in the years 2005 and 2006:
-When the TWO said, "A tropical depression could form tonight of the next day," a depression formed within 48 hours 53% of the time.
-When the TWO said, "Some slow development is possible," a tropical depression formed within 48 hours about 20% of the time.
-When the TWO said, "Tropical storm formation is not expected," a tropical depression formed within 48 hours only 3% of the time.

Figure 1. Verification of the Atlantic and Eastern Pacific Tropical Weather Outlooks issued in 2005 and 2006. Image credit: Jamie Rhome and Dan Brown, National Hurricane Center.
Jeff Masters
Reader Comments
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Elevation: 3 ft / 1 m
[Mostly Cloudy]
92 °F / 33 °C
Mostly Cloudy
Here is the link
Wind shear rising in the W. Caribbean. I don't see any development in the near future.
Wind Speed (WSPD): 7.8 kts
Wind Gust (GST): 7.8 kts
Atmospheric Pressure (PRES): 29.84 in
Pressure Tendency (PTDY): -0.04 in ( Falling )
Air Temperature (ATMP): 83.7 °F
Water Temperature (WTMP): 84.7 °F
Link
Also, EPAC has a yellow Link
Interesting radar out of Wilmington. Strange echo, huge bow?
Has anyone seen the 12z 144hr CMC? It is a long way out, but that is the first I have seen of that. Also looks as if it would head to sea. Will be watching to see if CMC persists.
As for the SW Carib blob, there is a chance it will develop, but it will only be for a moment if it does. Looks as if it will run out of water in the next day or two.
Out at the beach with the family this week and weekend, so I hope to pop in when I can, but am going to mostly be enjoying my vacation☺ Will be keeping an eye on those wacky Canadians and their model.
Models and much more.
Not attacking anyone...just saying it is good to see a little balance - which is what makes the conversation valuable. Often times, it is one-sided IMO.
Wassup ?
These June blow ups take 24 to 36 hrs to do anything if they do get going. If it is still there tomorrow morning then it has a chance.
For now, it is just a typical SW Caribbean blow up. Hey thunder starting outside !
Must be from that W Cuba ULL causing a build up over us
SWFL we can't be talking about long term conditions when the system hasn't even developed yet. As of now we are talking about the short term which at this point is the main focus. That upper level low if a few hundred miles north of the "Blob". The shear charts showing moderate trend of marginal to favorable upper level winds. And the SST remain warm enough to support tropcal cyclone development.
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