07-24-2017, 06:12 PM
In the East Pacific: Greg looks to be doomed, but Hilary and Irwin are predicted to interact with each other soon and we might see the Fujiwhara effect in play (where the two storms spiral into each other and potentially merge).
There's a nice article by Bob Henson describing the current situation:
https://www.wunderground.com/cat6/stormy...t-atlantic
"All three of the current systems—Tropical Storm Greg, Tropical Storm Irwin, and Hurricane Hilary (see Figure 1 above)—are projected to stay well out to sea over the next five days. Greg will be moving west toward increasing wind shear and drier air, and it will likely become a depression or remnant low by Wednesday. The more interesting dynamic will be the interplay between fast-intensifying Hilary (which could be a Category 2 or 3 storm as soon as Tuesday) and more slowly strengthening Irwin (likely to be a Category 1 by Wednesday). By midweek, Hilary is predicted to move within about 800 miles of Irwin, close enough to trigger Fujiwhara interaction, the process by which two tropical cyclones close to each other take on an aspect of rotation around a point in between. Because Hilary is expected to be a stronger cyclone at that point, its upper-level outflow will likely have an increasingly negative effect on Irwin’s strength."
There's a nice article by Bob Henson describing the current situation:
https://www.wunderground.com/cat6/stormy...t-atlantic
"All three of the current systems—Tropical Storm Greg, Tropical Storm Irwin, and Hurricane Hilary (see Figure 1 above)—are projected to stay well out to sea over the next five days. Greg will be moving west toward increasing wind shear and drier air, and it will likely become a depression or remnant low by Wednesday. The more interesting dynamic will be the interplay between fast-intensifying Hilary (which could be a Category 2 or 3 storm as soon as Tuesday) and more slowly strengthening Irwin (likely to be a Category 1 by Wednesday). By midweek, Hilary is predicted to move within about 800 miles of Irwin, close enough to trigger Fujiwhara interaction, the process by which two tropical cyclones close to each other take on an aspect of rotation around a point in between. Because Hilary is expected to be a stronger cyclone at that point, its upper-level outflow will likely have an increasingly negative effect on Irwin’s strength."