1977 Global Tropical Cyclones Outside the Northwest Pacific

Included in this database in 1977 6 Tropical Cyclones outside the Northwest Pacific: 6 in the North Indian Ocean. Strongest of the year: 1977 Unnamed North Indian Ocean Cyclone (approx. 56.6 m/s). For Northwest Pacific typhoons, please see 1977 Typhoon .

Data reliability:
● ReliableWeather satellites monitored these systems throughout, resulting in relatively accurate tracks and intensities (Atlantic and Eastern Pacific from 1966; other basins from 1980)
● Generally reliableAircraft entered typhoons for direct measurements, but satellites were not yet widespread: tracks are generally accurate, while intensities may be biased and weaker cyclones may be missing (from 1950 until satellite coverage became widespread)
● Inferred dataWith no satellites or aircraft that year, intensities were retrospectively estimated from records from ships and coastal weather stations (before 1950)
● Track onlyOnly approximate positions are available, with no wind speed or pressure records, so they are excluded from intensity rankings (mostly early records from the Indian Ocean and Southern Hemisphere)

The name	English Name	ocean area	Peak Category	Max Wind(m/s)	Minimum Pressure (hPa)	formed日期	数据可信度 ⓘ
-	-	North Indian Ocean	强气旋风暴	30.9	-	1977-05-09	较可靠
-	-	North Indian Ocean	强气旋风暴	30.9	-	1977-06-09	较可靠
-	-	North Indian Ocean	-	-	-	1977-10-19	仅路径
-	-	North Indian Ocean	气旋风暴	20.6	-	1977-10-27	较可靠
-	-	North Indian Ocean	极强气旋风暴	56.6	-	1977-11-09	较可靠
-	-	North Indian Ocean	极强气旋风暴	56.6	-	1977-11-14	较可靠

Data sources: NOAA IBTrACS v04r01; 等级按各ocean area当地机构分级换算, for reference only.