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

<P0-S0> The 2007 Atlantic hurricane season was an active Atlantic hurricane season, although most of the storms were weak and short-lived. <P0-S1>  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. <P0-S2>  It produced 17 tropical cyclones, 15 tropical storms, six hurricanes, and two major hurricanes. <P0-S3>  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. <P0-S4>  The first tropical cyclone, Subtropical Storm Andrea, developed on May 9, while the last storm, Tropical Storm Olga, dissipated on December 13. <P0-S5>  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. <P0-S6>  The season was one of only six on record for the Atlantic with more than one Category 5 hurricane. <P0-S7>  It was the second on record in which an Atlantic hurricane, Felix, and an eastern Pacific hurricane, Henriette, made landfall on the same day. <P0-S8>  September had a record-tying eight storms, although the strengths and durations of most of the storms were low. <P0-S9>  Aside from hurricanes Dean and Felix, none of the storms in the season exceeded Category 1 intensity. <SEP> <P1-S0>  The storm was the first named storm of the season. <P1-S1>  It hit Florida across the Southeast United States in July, causing a massive flooding disaster while stalling over Georgia and Alabama. <P1-S2>  Alberto caused $1 billion in damage (1994 USD) and 30 deaths. <P1-S3> Tropical Storm Alberto was the costliest storm of the 1994 Atlantic hurricane season. <SEP> <P2-S0> The 1994 Atlantic hurricane season produced seven named tropical cyclones and three hurricanes, a total below the Atlantic hurricane season average. <P2-S1>  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. <P2-S2>  The first tropical cyclone, Tropical Storm Alberto, developed on June 30, while the last storm, Hurricane Gordon, dissipated on November 21. <P2-S3>  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. <P2-S4>  The most intense hurricane, Hurricane Florence, peaked as a Category 2 storm with winds of 110 mph . <P2-S5>  Aside from Chris, Florence, and Gordon, none of the storms exceeded tropical storm intensity. <SEP> <P3-S0>  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. <P3-S1> The 1994 Atlantic hurricane season was a below-average Atlantic hurricane season that produced seven named tropical cyclones. <P3-S2>  The first named storm, Tropical Storm Alberto, formed on June 30. <P3-S3>  The last storm of the season, Hurricane Gordon, dissipated on November 21. <P3-S4>  This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, as well as dissipation during the season. <P3-S5>  The timeline also includes information which was not operationally released, such as post-storm reviews by the National Hurricane Center.