of major hurricanes. Ultimately, the predictions issued by CSU proved to be too low, with 13 subtropical or tropical storms forming in 1984 and 5 of those reaching hurricane status. Season summary Six storms during the season had subtropical characteristics at some point in their track, those being Subtropical Storm One, Tropical Storm Cesar, Hurricane Hortense, Hurricane Josephine, Hurricane Klaus, and Hurricane Lili. The season's activity was reflected with a cumulative accumulated cyclone energy (ACE) rating of 84, which is classified as "near normal". ACE is, broadly speaking, a measure of the power of the hurricane multiplied by the length of time it existed, so storms that last a long time, as well as particularly strong hurricanes, have high ACEs. It is only calculated for full advisories on tropical systems at or exceeding 39 mph (63 km/h), which is the threshold for tropical storm strength. Systems Tropical Depression One By June 11, an upper-level low caused thunderstorm development off the Florida coast, which caused the formation of a tropical depression. Moving westward, the depression moved into St. Augustine, causing a total of of rainfall at Jacksonville Beach, Florida, as its main thunderstorm activity was concentrated north of the center. It dissipated as a tropical cyclone on June 14 while moving through the Florida panhandle. The small remnant low continued moving westward inland of the Gulf coast, causing occasional redevelopment of thunderstorm activity as the system moved into Louisiana, before both the thunderstorm activity and low-pressure area dissipated by June 17. Tropical Depression Two An upper-level low-pressure area traversing the southern Gulf of Mexico spawned convective activity over the Isthmus of Tehuantepec on June 16. This convective area waxed and waned somewhat in intensity, until becoming a larger disturbance on June 18. A surface low soon formed, and around 12:00 UTC that day, the system developed into a tropical depression over the Bay of Campeche. With vertical wind shear preventing significant further intensification, the depression made landfall near Tampico, Tamaulipas, with winds of 35 mph (55 km/h). The depression quickly dissipated over the mountainous terrain of eastern Mexico. The cyclone and its precursor dropped heavy rainfall in some areas, including a peak total of of precipitation in San Lucas Ojitlán, Oaxaca. Tropical Depression Three A tropical depression formed about east of the Windward Islands on July 24. Moving west-northwestward, the depression passed between Martinique and Saint Lucia early on the following