Hurricane Joan-Miriam

Hurricane Joan–Miriam

Category 4 major hurricane (SSHWS/NWS)
Hurricane Joan near peak intensity on October 21 east of Costa Rica
Formed	October 10, 1988
Dissipated	November 2, 1988
Highest winds	1-minute sustained: 145 mph (230 km/h)
Lowest pressure	932 mbar (hPa); 27.52 inHg
Fatalities	216-334 total (all as Joan)
Damage	$2 billion (1988 USD)
Areas affected	Windward Islands, Aruba, Bonaire, Curaçao, Colombia, Venezuela, Costa Rica, Panama (as Joan), El Salvador, Guatemala, Mexico (as Miriam), Nicaragua (as both)
Part of the 1988 Atlantic hurricane season and 1988 Pacific hurricane season

Hurricane Joan was a powerful hurricane that caused death and destruction in over a dozen countries in the Caribbean and Central America. Moving on a due west course for nearly two weeks in October 1988, Hurricane Joan caused widespread flooding and over 200 deaths after moving into Central America. Widespread suffering and economic crises were exacerbated by Joan, primarily across Nicaragua, as heavy rains and high winds impacted those near the hurricane's path.

After crossing Central America into the Pacific, the cyclone was renamed Tropical Storm Miriam, with the system's dissipation occurring southwest of Mexico. Joan–Miriam was the final hurricane of the 1988 Atlantic hurricane season and the final named storm of the Pacific hurricane season.

One of the latest Cape Verde-type hurricanes to form in any season, Joan formed from an area of convection in the intertropical convergence zone that moved off the coast of Africa early in October. It developed banding and was upgraded to Tropical Depression Seventeen on October 10 and later designated as Tropical Storm Joan while located at low latitude in the central Atlantic Ocean.

Joan gradually strengthened as it passed over the southern Windward Islands on October 15. It continued heading west in response to a strong Ridge, and passed over the Guajira Peninsula on October 17. After entering the extreme southwestern Caribbean Sea, Joan strengthened into a hurricane. It then slowly executed a small counterclockwise loop, possibly in response to the nearby Tropical Depression Eighteen. Upwelling caused by the quasi-stationary hurricane weakened the system. As the nearby depression dissipated, Joan resumed its westward track. A strong anticyclone over the southwestern Caribbean Sea created an extremely favorable environment, and Joan underwent rapid deepening at a rate of 38 millibars in the space of a day. With a minimum pressure of 932 millibars, Joan was one of the strongest October hurricanes since 1961. At the time, it was located at 12°N, the southernmost Category 4 hurricane ever recorded at the time. That record has since been broken by Hurricane Ivan.