Super Typhoon affected Hong Kong on 16 September 2018 with destructive southeasterly winds, intense rainbands bringing frequent squalls and heavy rain with severe flooding. Under the influence of storm surge the water level at Victoria Harbour has reached about 3.9 meters above chart datum. The Hong Kong Observatory appealed on that day to the members of the public to stay on high alert with Signal 10 for storm category 5.
IMGW also come with an early prepared numerical simulation of Super-Typhoon “Mangkhut” with real data before the tropical storm attacked Hong Kong. The forecast material was also delivered to Dr. Chi-ming Shun, Director of the Hong Kong Observatory, and shared on public on FB.
The forecast is for 36 hours ahead using the last released version of Weather Research Forecast WRF v. 4.0 model with initial and boundary conditions taken from GFS global model.
The forecast video outputs show 36 hours forecast of the following parameters:
- Relative Humidity (%) at 700 hPa level
- Sea Level Pressure (hPa) and 10m wind (m/s)
- Absolute vorticity at 700 hPa (10-3s-1)
- Relative Storm Motion (m/s) between (0-6km)
- Total accumulated precipitation (kg/m2)
People expresses are especially grateful to Dr. Chi-ming Shun, Director of the Hong Kong Observatory (personnel communication) for a timely and accurately weather early warning information and advisory reports about the extremely bad weather conditions