Question: Which 1994 tropical storm formed on June 30 and proved to be the costliest of that Atlantic hurricane season?

 The season officially began on June 1 and ended on November 30, dates which conventionally limit the period of each year when tropical cyclones tend to form in the Atlantic.  The first named storm, Tropical Storm Alberto, formed on June 30.  The last storm of the season, Hurricane Gordon, dissipated on November 21. The 1994 Atlantic hurricane season was a below-average Atlantic hurricane season that produced seven named tropical cyclones.  This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, as well as dissipation during the season.  The timeline also includes information which was not operationally released, such as post-storm reviews by the National Hurricane Center. <SEP>  The storm was the first named storm of the season. Tropical Storm Alberto was the costliest storm of the 1994 Atlantic hurricane season.  It hit Florida across the Southeast United States in July, causing a massive flooding disaster while stalling over Georgia and Alabama.  Alberto caused $1 billion in damage (1994 USD) and 30 deaths. <SEP> The 2007 Atlantic hurricane season was an active Atlantic hurricane season, although most of the storms were weak and short-lived.  However, the 2007 season was the first season to feature more than one Category 5 landfalling hurricane, a feat that would not be matched until 2017.  It produced 17 tropical cyclones, 15 tropical storms, six hurricanes, and two major hurricanes.  It officially started on June 1 and ended on November 30, dates which conventionally delimit the period during which most tropical cyclones form in the Atlantic Ocean.  The first tropical cyclone, Subtropical Storm Andrea, developed on May 9, while the last storm, Tropical Storm Olga, dissipated on December 13.  The most intense hurricane, Dean, is tied for the eighth most intense Atlantic hurricane ever recorded as well as the third most intense Atlantic hurricane at landfall.  The season was one of only six on record for the Atlantic with more than one Category 5 hurricane.  It was the second on record in which an Atlantic hurricane, Felix, and an eastern Pacific hurricane, Henriette, made landfall on the same day.  September had a record-tying eight storms, although the strengths and durations of most of the storms were low.  Aside from hurricanes Dean and Felix, none of the storms in the season exceeded Category 1 intensity. <SEP> The 1994 Atlantic hurricane season produced seven named tropical cyclones and three hurricanes, a total below the Atlantic hurricane season average.  It officially started on June 1 and ended on November 30, dates which conventionally limit the period during which most tropical cyclones form in the Atlantic Ocean.  The first tropical cyclone, Tropical Storm Alberto, developed on June 30, while the last storm, Hurricane Gordon, dissipated on November 21.  The season was unusual in that it produced no major hurricanes, which are those of Category 3 status or higher on the Saffir–Simpson hurricane scale.  The most intense hurricane, Hurricane Florence, peaked as a Category 2 storm with winds of 110 mph .  Aside from Chris, Florence, and Gordon, none of the storms exceeded tropical storm intensity.