Draft:Typhoon Choi-wan (2003)

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Typhoon Choi-wan (Roskas)
Typhoon Choi-wan at peak intensity on September 21
Meteorological history
FormedSeptember 16, 2003
ExtratropicalSeptember 23, 2003
DissipatedSeptember 24, 2023
Typhoon
10-minute sustained (JMA)
Highest winds130 km/h (80 mph)
Lowest pressure955 hPa (mbar); 28.20 inHg
Category 3-equivalent typhoon
1-minute sustained (SSHWS/JTWC)
Highest winds185 km/h (115 mph)
Lowest pressure955 hPa (mbar); 28.20 inHg
Overall effects
Damage$2.5 million (2003 USD)
Areas affectedJapan

Part of the 2003 Pacific typhoon season

Typhoon Choi-wan, known in the Philippines as Typhoon Roskas[1], was a powerful typhoon which paralleled Japan in September 2003. The 29th depression, 15th named storm, and 9th typhoon of the 2003 Pacific typhoon season, Choi-wan developed from (TBD)

Meteorological history[edit]

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

In mid-September 2003, the monsoonal trough spawned a tropical disturbance east-northeast of Luzon. At the time, the system was in an environment with low wind shear and favorable conditions, allowing the disturbance to rapidly develop. On 00:00 UTC on September 16, the Japan Meteorological Agency (JMA) would state that the disturbance had developed into a tropical depression.[2] On 01:30 UTC the next day, the JTWC would first note the disturbance in the Philippine Sea, later issuing a Tropical Cyclone Formation Alert (TCFA) less than 12 hours later.[3] On September 18, both the JMA and JTWC would recognize the system as a tropical storm, with the former naming it Choi-wan.[2][3]

Choi-wan would be upgraded to a severe tropical storm on September 19 as it paralleled Japan, later peaking as a typhoon at 21:00 UTC on September 20.[2] After that, Choi-wan would steadily weaken, becoming a severe tropical storm on September 22 and transitioning into an extratropical low the next day, resulting in the JTWC issuing their last advisory on the system.[2][3] The JMA would monitor the system until it crossed the International Date Line later that day.[2]


References[edit]

  1. ^ Gary Padgett (2003). "Monthly Global Tropical Cyclone Summary, November 2003". Retrieved January 31, 2013.
  2. ^ a b c d e Annual Report on Activities of the RSMC Tokyo – Typhoon Center 2003 (PDF) (Report). Japan Meteorological Agency. Retrieved January 27, 2013.
  3. ^ a b c Joint Typhoon Warning Center. 2003 Annual Tropical Cyclone Report (PDF) (Report). United States Navy. Archived from the original (PDF) on February 21, 2013. Retrieved January 27, 2013.