Tropical Storm Sonca (2017)

Tropical Storm Sonca
Tropical storm (JMA scale)
Tropical storm (Saffir–Simpson scale)

Sonca nearing landfall on July 25
Formed July 21, 2017
Dissipated July 25, 2017
Highest winds 10-minute sustained: 65 km/h (40 mph)
1-minute sustained: 85 km/h (50 mph)
Lowest pressure 994 hPa (mbar); 29.35 inHg
Fatalities 31 confirmed (as of August 2)
Damage $7.3 million (2017 USD)
Areas affected Hainan, Vietnam, Cambodia, Laos, Thailand (particulary Sakhon Nakhon), Myanmar
Part of the 2017 Pacific typhoon season

Tropical Storm Sonca was a weak tropical cyclone that impacted Indochina during the end of July 2017.

Meteorological history

Map plotting the track and intensity of the storm according to the Saffir–Simpson scale

On July 21, both the JMA and the JTWC reported that Tropical Depression 08W had developed approximately 582 km (361 mi) to the south of Hong Kong.[1][2] After moving westward for a couple of days, the system strengthened into a tropical storm by both agencies while nearing the island province of Hainan, receiving the name Sonca.[3] By July 24, Sonca reached its maximum intensity with a minimum pressure of 994 hPa.[4] Early on July 25, the JTWC issued its final advisory as the system made landfall over in Quảng Trị Province, Vietnam.[5][6] The JMA issued its final advisory a few hours later until it weakened into an area of low-pressure.

Preparations and impact

Cambodia

Tropical Storm Sonca affected 4 provinces across Cambodia, at least 3 people died and 2686 houses were submerged. 53 households were affected and only 23 were evacuated.[7]

Thailand

Flash floods across Thailand killed 23 people and affected 44 out of 76 provinces in Thailand. The hardest hit province was Sakon Nakhon, Northeast Thailand as the storm forced the closer of Sakon Nakhon Airport lasting for 3 days.[7] Damages in Sakon Nakhon exceeded 100 million baht (US$3million).[8]

See also

References

  1. "Marine Weather Warning for GMDSS Metarea XI 2017-07-21T06:00:00Z". WIS Portal – GISC Tokyo. Japan Meteorological Agency. Retrieved July 21, 2017.
  2. "Tropical Depression 08W (Eight) Warning Nr 001". Joint Typhoon Warning Center. July 21, 2017.
  3. "Tropical Storm 08W (Eight) Warning Nr 009". Joint Typhoon Warning Center. July 23, 2017.
  4. "Tropical Storm 08W (Sonca) Warning Nr 016". Joint Typhoon Warning Center. July 24, 2017.
  5. "Tropical Storm 08W (Sonca) Warning Nr 018". Joint Typhoon Warning Center. July 25, 2017.
  6. "VIDEO Cập nhật bão số 4: Đổ bộ vào Quảng Trị và gây mưa lớn | TTVH Online". thethaovanhoa.vn. Retrieved August 5, 2017.
  7. 1 2 "AHA Centre Flash Update: Flooding, Cambodia, Lao PDR, Myanmar & Thailand. - Myanmar". ReliefWeb. Retrieved August 5, 2017.
  8. "Sakon Nakhon flood damage estimated at over Bt100 million". nationmultimedia.com. Retrieved August 5, 2017.
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