NHC Introduces 5-day Graphical TWO

By: Astrometeor , 1:03 AM GMT on July 02, 2014

So, the NHC has begun its use of the 5-day graphical Tropical Weather Outlook (TWO). This comes after a 4-year test of their 5 day skills in forecasting tropical cyclogenesis.

The 5-day chart will include everyone's favorite Crayola ovals, now expanded to include 5 days of potential formation area. The correspondingly colored “X” will be the location of the disturbance at the time of the TWO's issuance. An arrow will be used whenever the X (x marks the spot) is located outside of the potential formation area (our colorful ovals). The same colors will be used (yellow = low, orange = medium, red =high).

More explanation (and a link to the feedback survey) is here at the NHC's blog: NHC Blog



For the 48-hour graphics, it will look similar to the current overlay of clouds, but the 48 hour forecast will have Xs marked with centers of the disturbances, and colored according to the 48-hour outlook. The NHC will also put the corresponding colored percentages and numbers (numbers mark the order of appearance of these disturbances and give the NHC a reference label) next to each colored X.



Short video courtesy of the NHC on the new changes:



Thanks for reading, and since we now have TS Arthur, welcome to the 2014 Atlantic Hurricane Season (and July)!

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Reader Comments

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4. WunderAlertBot (Admin)
10:14 PM GMT on July 08, 2014
Astrometeor has created a new entry.
3. Astrometeor
2:19 AM GMT on July 06, 2014
Quoting 1. MaxWeather:

Hmm thanks for the info. Now I don't need to do the research myself...

Looks like this may be something for the Central Pacific later on?



You're welcome Max.

Very possibly. Nino years always have a threat to Hawaii.
Member Since: December 31, 1969 Posts: Comments:
2. MaxWeather
12:51 AM GMT on July 06, 2014
Hey Astro... just to let you know some more about my issue from there...

My "belligerent" character of discussion from South Carolina almost gets in a serious "physical confrontation" with a co-worker today. I was just told that on FB.
I know what you may ask but he doesn't say anything about this impulsive reaction. So Idk.
Member Since: December 31, 1969 Posts: Comments:
1. MaxWeather
8:02 PM GMT on July 05, 2014
Hmm thanks for the info. Now I don't need to do the research myself...

Looks like this may be something for the Central Pacific later on?
Member Since: December 31, 1969 Posts: Comments:

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