Quick intensification followed, and an upper-level low to the northwest assisted in providing outflow.
Additionally, an upper-level trough provided outflow, instead of an anticyclone as found in tropical cyclones.
With warm waters and an anticyclone providing outflow, the depression quickly intensified, becoming Tropical Storm Dera on March 9 and soon after developing an eye feature.
Strong upper-level cyclones far to its northwest provided outflow channels and light wind shear, with warm water temperatures along its path.
Conditions were favorable for development, with low wind shear and a large anticyclone providing outflow, or the outward wind flow from a storm.
An upper-level low to the northeast provided outflow, and the Joint Typhoon Warning Center issued a tropical cyclone formation alert early on July 19.
Due to the approach of an upper-level trough, it was expected to dissipate quickly from wind shear, although forecasters noted the possibility for the trough to provide an outflow channel, which might allow strengthening.
Additionally, a nearby anticyclone provided good outflow for the system.
The combination of the two provided favorable outflow, allowing Kate to quickly intensify.
An anticyclone aloft provided favorable outflow, which contributed in the strengthening.
