nearby ships were used to upgrade the depression to a tropical storm twelve hours later. Despite persistent, deep convective activity, a trek over colder waters prevented Emily from further intensifying, and the system instead transitioned into an extratropical cyclone around 12:00 UTC on September 14. Hurricane Florence The strongest cyclone of the 1977 season began as a tropical disturbance over the open eastern Pacific. It developed into a tropical depression around 12:00 UTC on September 20 and strengthened into Tropical Storm Florence twelve hours later. The newly formed system moved west-northwest until reaching hurricane strength by 00:00 UTC on September 22, at which point Florence sharply curved toward the north-northeast. With a well-defined eye on satellite imagery, the storm reached peak winds of around 18:00 UTC on September 22, a Category 2 hurricane. Florence accelerated over increasingly cool ocean temperatures, causing it to weaken to a tropical storm early on September 23, weaken to a tropical depression early on September 24, and transition to an extratropical cyclone by 12:00 UTC that day. Tropical Storm Glenda Tropical Storm Glenda formed around 00:00 UTC on September 24 from a previously established area of disturbed weather well southwest of Acapulco. The storm did not intensify beyond minimal tropical storm strength and instead fell to tropical depression strength around 00:00 UTC on September 25. A north to northwestward forward motion brought the cyclone over progressively cooler waters, and it transitioned to an extratropical cyclone by 06:00 UTC on September 27 while located near Punta Eugenia, Baja California Sur. Hurricane Heather The final named storm of the season began as a tropical disturbance late on October 3. It moved west-northwest, organizing into a tropical depression around 00:00 UTC on October 4 and further intensifying into Tropical Storm Heather six hours thereafter. A sprawling storm, Heather reached hurricane strength early on October 5 and attained peak winds of by 12:00 UTC that day. A turn toward the north-northwest, however, brought the storm over increasingly cool waters, prompting a weakening trend. Heather fell to tropical storm strength late on October 6 and further to a tropical depression by 12:00 UTC as its low- and mid-level circulations became dislocated, marking an end to its time as a tropical cyclone. The remnants continued into Arizona, where measurable rainfall peaked at , with unspecified reports of up to in mountainous locales. As a result, the Santa Cruz River near Tucson