Cyclone Megh Makes Direct Hit on Socotra; Second Final Landfall In Yemen (RECAP)

This came on the heels of Cyclone Chapala, which made an extremely rare pass through the region, triggering destructive flash flooding Nov. 1-3, 2015.

(CHAPALA RECAPS: A Rare, Destructive Landfall | News Reports, Photos)

According to the India Meteorological Department (IMD), the agency sanctioned by the World Meteorological Organization for issuing official tropical cyclone bulletins for the Arabian Sea, Cyclone Megh was a strong Category 2 or Category 3 on Nov. 8 near the time it made a direct hit on the main island of Socotra, about 150 miles east of the Horn of Africa in the central Arabian Sea that is a part of Yemen. The U.S. Joint Typhoon Warning Center (JTWC) classified Megh as a Category 3 equivalent near the time it hit Socotra.

Back-to-back cyclones (Chapala and Megh) affecting Socotra within a week's time is unprecedented in the historical record (More on that below). At least two people were killed many others injured by the cyclone in Socotra. For more on impacts in Socotra from Cyclone Megh, see our news article at this link.

After making a direct hit on Socotra and then brushing northeast Somalia, satellite imagery showed that Megh became less organized due to land interaction, dry air and cooler sea-surface temperatures. The IMD and JTWC classified Megh as a tropical storm as it moved into mainland Yemen just northeast of Aden on Nov. 10.

According to Relief Web, heavy rains in Somalia led to flooding which resulted in destruction to property and infrastructure, including roads and buildings.

Tropical cyclones in the Indian Ocean basin, which includes the Arabian Sea, are simply known in English as "cyclones" or "cyclonic storms" once they produce winds equivalent to tropical storm force. There are no special terms such as "hurricane" or "typhoon" applied based on reaching higher intensity, but the India Meteorological Department does apply various adjectives such as "severe" or "very severe" to describe different intensity levels.

(MORE: Why Tropical Cyclones Are Named)

Unprecedented Back-to-Back Cyclones

There was no record of a cyclone of Category 4 strength or stronger tracking as far south in the Arabian Sea prior to Chapala.

You may wonder, then, if there is any record of back-to-back cyclones within roughly a week's time affecting this region of the Arabian Sea.

According to NOAA's historical hurricane tracks database, only once before on record have a pair of cyclones tracked within 200 nautical miles of Socotra Island within the same season.

Cyclone Twelve passed over the island on Oct. 24, 1972. Less than one month later, Cyclone Thirteen fizzled southeast of Socotra on Nov. 21.

So, it's safe to say back-to-back cyclones affecting Socotra Island within a week's time is unprecedented in the historical record.

According to NOAA, prior to Chapala, there had been 16 cyclones of record that tracked within 200 nautical miles of the mouth of the Gulf of Aden. 

(MORE: Hurricanes in Strange Places | Strange Things in the Tropics in 2015)

Despite all this, Arabian Sea tropical cyclones are not as unusual as they sound.

Each year, an average of one to two tropical cyclones form in the Arabian Sea, according to a 2011 climatology study by Amato Evan and Suzana Camargo. 

These cyclones are most likely to form in two periods: May-June and October-November. The mid-late summer period is typically not favorable, thanks to increased wind shear from the wet phase of the Asian monsoon. 

(MORE: Where the Season Peaks Twice)

Somalian tropical cyclones aren't even as rare as they may sound, according to Colorado State University tropical expert, Dr. Phil Klotzbach.

In June 2007, Cyclone Gonu was the most intense Arabian Sea storm on record, making landfall in Oman, then in southern Iran.

Gonu claimed 100 lives in Oman, Iran and the United Arab Emirates and was responsible for $4 billion in damage, according to the Evan and Camargo study.

Almost exactly three years later, Cyclone Phet alarmingly intensified to a Category 4 equivalent cyclone, before weakening to a Category 1 storm upon making landfall on the eastern tip of Oman, east of the capital city of Muscat. 

In May 1999, Cyclone ARB 01 slammed into Pakistan near Karachi as a strong Category 3 equivalent storm, killing at least 700 in Pakistan. This was the strongest tropical cyclone on record to hit Pakistan.

(MORE: Deadliest Tropical Cyclones in World History)

In the limited historical record, however, strong cyclones in the Arabian Sea are more rare than other basins, due to the proximity of dry air from the Arabian Desert, the aforementioned increased wind shear during the wet phase of the Asian monsoon, and the basin's overall small size.

MORE ON WEATHER.COM: Cyclone Chapala Photos, Images