Geoscience Reference
In-Depth Information
Warning Level
Criteria
2
Success Ratio = 1- FAR = 5- 10% with POD=20-30%
1
1-FAR= 1-5% and POD=60-70%
Table 7. Hazardous Criteria Level
Fig. 18. The processing steps for hazardous wind potential at JMA. It is typical of current
systems where mesoscale NWP predictions are assumed to be good enough to match with
the observations.
6.12 SWAN - CHINA/CMA
In 2008, the China Meteorological Administration (CMA) launched a campaign on the
development of its first version of integrated nowcasting system SWAN (Severe Weather
Analysis and Nowcast system). This system aims at providing an integrated, state-of-the-art
and timely severe weather nowcast platform for operational forecasters at all levels over
China. SWAN ingests data from China's new generation Doppler radars (both S-band and
C-band), automatic weather station, satellite, and mesoscale numerical weather prediction
model. It offers a tool for severe weather monitoring, analysis, nowcasting and warnings
such as flashing a real-time alert, driving next algorithm processes and sending a warning
via SMS, etc.
The server application includes several modules, such as providing log files for monitoring
system behavior, configuring network environment, setting data acquisition parameters,
performing quality control for radar data and AWS data, generating 3D radar reflectivity
mosaic, running algorithm for nowcast products, analyzing observation data and providing
message for alerting the forecasters.
