I saw a great discussion on several Twitter/X threads about revamping some of the threat messaging for tropical systems moving forward to convey the full inland threats better -- the new cone is a good step, but more can be done.
Much of the conversation centered on the "HTI", or the "Hurricane Threats and Impacts" graphics that I had not heard of until that conversation, and I consider myself pretty weather-savvy! Apparently, each WFO gets a webpage (for example, Tampa Bay's is at
https://www.weather.gov/srh/tropical?office=tbw#hti and others can be found by replacing "tbw" with the WFO's abbreviation, this url works for the south and southeast, the northern states have a different one.) In all of my looking at graphics and such from a myriad of sites for these kind of storms, I have NEVER seen the HTI before, but I think it's fantastic and simple!
It gives a threat level, color-coded in four levels, for each of 4 threats -- wind damage, storm surge, rainfall, and tornadoes. Each of the 4 graphics are geographically placed to show the threat depicted in each area. The discussion from several meteorologists and enthusiasts alike on X was to create a Composite HTI graphic that is the max of the four HTI's across every area. This would give a simple color-coded threat level 1-4 for each area to see on the approach of a storm.
Brandon Black on Twitter came up with such a Composite HTI (with earliest arrival of TS winds overlaid), and I think this gives an excellent summary of the threat Helene posed and matches the highest damage areas mostly (the Alabama threat didn't pan out much, though, but otherwise!)
Thoughts people?
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