The 2025 hurricane season forecast from Colorado State University was released this past Thursday and like our forecast, they are forecasting a somewhat above average season in terms of activity. CSU is forecasting 17 named storms, 9 of those storms becoming hurricanes and 4 of those hurricanes becoming major hurricanes. This is comparable to our forecast in which we released on March 20. In our forecast, we are forecasting 16 named storms, 7 of those storms becoming hurricanes and 4 of those hurricanes becoming major hurricanes.
There are a couple of reasons why we are expecting a busier than average hurricane season.
The First Reason Is The Likelihood Of ENSO-Neutral Conditions During This Summer Into This Fall: Weak La Nina conditions currently exist across the eastern Pacific and it seems rather likely that we will see neutral ENSO conditions during the peak of the Atlantic hurricane season forecast.
Neutral ENSO conditions is an enhancing influence on tropical activity during the hurricane season. This means that at least somewhat above average activity can be expected this hurricane season in terms of the number of tropical storms and hurricanes.
A Second Reason Are The Ocean Water Temperatures: Ocean water temperatures are currently warmer than average across the western and central Atlantic & is currently slightly below average over the eastern tropical Atlantic. Warmer than average ocean water temperatures are also currently occurring over the eastern subtropical Atlantic.
It should be noted that there is a positive correlation between above average ocean temperatures over the Caribbean and the eastern subtropical Atlantic during April and an active Atlantic hurricane season.
Analog Years: The analog years that Colorado State University used for their forecast are very close to what we used for analog years.
CSU went with the following analog years that seem to be a close match with what the 2025 hurricane season might be like – 1996, 1999, 2006, 2008, 2011 & 2017.
Our analog forecast here at Crown Weather used the following years for what the 2025 hurricane season may be like. They are 1895, 1916, 1959, 1967, 1996, 1999, 2008, 2011, 2017 & 2021.
Landfall Threat Forecast: There are no changes at all with my landfall threat forecast. In the map attached to this discussion, I have added my expectations of the most likely potential tracks of tropical systems this season.
There are still three areas that I’m most concerned about for this upcoming season in terms of a tropical storm or hurricane impact.
The First Area Is the area from the Carolinas northward to Southern New England. As I mentioned previously, all indications seem to be pointing towards this being an East Coast concentrated season for tropical storm or hurricane threats. Based on this, in addition to model guidance and analog data, I do think that a corridor from South Carolina and North Carolina northward to Southern New England could be an area to really watch.
The Second Area Of Particular Concern Is across the far northeastern Caribbean, including the far northern Leeward Islands, the Virgin Islands and Puerto Rico.
Model guidance and analog data seems to be pointing towards the possibility of any tropical systems moving westward from the central and eastern tropical Atlantic to begin curving west-northwest and northwest just before they reach the Caribbean. This leads to the potential for these tropical systems to directly impact the northeastern Caribbean before they either head further west towards the Bahamas or the East Coast of the United States or curve northward into the open Atlantic.
Another Area Of Some Concern Is the area from the northwestern Caribbean northward to the central Gulf coast where any tropical disturbances moving westward may begin to strengthen by the time they reach the northwestern Caribbean and then head for the central Gulf Coast.
Even though your area may have a low or medium risk this season, be aware that any small fluctuations in the upper level weather pattern at the “wrong” time could threaten the low or medium risk areas.
Finally, I am pushing up the date of the start of regular tropical weather discussions for the 2025 Atlantic Hurricane Season. I now expect to begin issuing regular tropical weather discussions on Thursday, May 1.
The reason why is because there are some subtle signs in the very long model guidance that there could be some sort of tropical development sometime during early or mid-May. Very long model guidance has been somewhat consistent in showing this scenario & because of this, I am pushing up the start date of tropical weather discussions to May 1.