Cat Bonds: Forecasters at CSU Raise Their Hurricane Expectations From Six To Seven

But you knew they would didn't you.*
From Artemis, August 6:
2019 hurricane forecast raised to seven after Barry, by Colorado State

One additional Atlantic hurricane is now being forecast for the 2019 Atlantic Hurricane Season by the Colorado State University (CSU) tropical weather forecasting team, after it included recent storm Barry in its seasonal forecast.

For the entire 2019 Atlantic tropical storm and hurricane season, the Colorado State team led by Philip J. Klotzbach has updated its forecast to 14 named storms, 7 hurricanes and 2 major hurricanes of Category 3 strength or greater.

The figures have been lifted since tropical storm Barry briefly made hurricane status as it approached landfall on the Gulf Coast.

That storm is not expected to cause a significant insurance or reinsurance market loss, with the latest estimates ranging from $300 million to a maximum of $600 million.

But the intensification of Barry into a hurricane has led the forecasters to add it to their forecast for the number of hurricanes that will form, meaning there are still 6 more hurricanes to go during the season, according to the Colorado State team’s prediction....MUCH MORE

*"Hurricane Outlook May Change For The Worse As El Niño Fades"

That was from July 25 and also re-referenced "Re/Insurance: With Today's Start of the Official Hurricane Season, A Look At Various Forecasts":

...From opening day of the 2019 season:
June 1, 2019
Re/Insurance: With Today's Start of the Official Hurricane Season, A Look At Various Forecasts

The most interesting factor at the moment, more interesting even than the SAL (Saharan Air Layer) if you can believe that, is the El El Niño/Southern Oscillation. 
(just kidding about the SAL, it doesn't really come into play until those long-haul Cape Verde storms start running later in the season) 

As noted a couple weeks ago in "Hurricane Watch: Australia's Bureau of Meteorology Lowers Odds of Full-Blown El Niño":

Long time readers know the El Niño/Southern Oscillation, through a couple teleconnections influences the North Atlantic hurricane season. Stronger/longer El Niño tends to correlate with fewer hurricanes, La Niña tends toward more 'canes....

*** 

...Look for later hurricane season forecasts to add one or two more hurricnes than the earlier guesses.
The BOM is one of our big three public sources on ENSO conditions, along with Columbia Uni/IRI and the US. NOAA.
For El Niño Modoki situations Japan's Japan Agency for Marine-Earth Science and Technology (JAMSTEC) is the go-to.
Finally, the comment thread on this NOAA page seems to be leaning toward a Modoki:...

And it's not just a less powerful El Niño that raises the chances for a more active hurricane season.
Should the above mentioned Modoki variation be the summer-of-2019 story we hark back to this 2009 post:
New Type Of El Nino Could Mean More Hurricanes Make Landfall