The diagnostic analysis combines WSR-88D national radar and
echo top mosaics (provided by NOAA with mosaics created and
distributed by UNISYS) and cloud-to-ground lightning (provided by
Global Atmospherics Inc). The Convective Hazard Detection field is
depicted based on a 6 level intensity scale. The 6 levels
fundamentally correspond to VIP level (see images above and to the
Forecasts are determined by applying a stratiform-convective
partitioner (Steiner et.al. 1985) and an elliptical filter (Wolfson
et al. 1998) to the hazard detection field. These filters eliminate
stratiform return and small-scale perishable features that are not a
hazard to aviation or are not likely to persist for 1 hour,
respectively. Extrapolations are performed based on the Thunderstorm
Identification Tracking and Nowcasting (TITAN, Dixon and Wiener
Click on the above image to plot forecast polygons (blue
The NCWF forecast product does well with long lived mature
systems. However, the initiation, growth, and dissipation of these
systems, as well as shorter lived isolated storms, are not well
forecast. Work on automated methods to forecast the growth and
dissipation of storms is on going.
This training module is broken into 7 categories. For information
setting up your browser - click on "Setup".
how to use the web page - click on "Navigation".
steps taken to create hazard field - click on "Hazard
how forecasts are produced - click on "Forecast".
how to interpret performance image - click on "Performance".
what to do when things don't work - click on "Help".
frequently asked questions - click on "FAQ".
Also, a quick reference to the product can be viewed by clicking
To view the "Aeronautical Information Manual"
click on "AIM".
Click on the "Intro" link (left menu) to return
to this introduction page.
Click on the "NCWF" logo (top left) to return to