Storyline · concluded · The storm ledger
Helene
Every dispatch filed on Helene, in order, so you can watch the call sharpen from first mention to the last word.
4Dispatches
4Days · SEP 23–SEP 26
I-26Tropics
The route · every exit
- Exit 1 · SEP 23 · Subscribers Advisories have started on a potentially historical storm
- Exit 2 · SEP 24 Helene likely to landfall as a major hurricane along Florida panhandle coast
- Exit 3 · SEP 25 Major damage expected throughout Georgia as Helene plows inland
- Exit 4 · SEP 26 · Subscribers Rapid intensification underway through landfall
END
Why I-26?
Tropical stories ride Interstate 26, after the 26 °C sea-surface temperature often used as a rough threshold for tropical development.
26 °C
The sea-surface temperature often used as a rough threshold for tropical development; the shield number of this road.
Invest
An area the Hurricane Center is investigating, numbered 90–99 with a basin letter, before it has a name.
ACE
Accumulated Cyclone Energy: a season's wind, squared and summed every six hours. Climatology sets the scale.