User's Guide

Table Of Contents
FasTrac Millennium User’s Guide – May 2003
Managing Storm Tracks
5. Select the AutoTrac button. The status panel will indicate, “Replaying archived data for
AutoTrac.” After a short pause, it will read, “Finished replay. Left-click on storm’s
position.”
6. Carefully click the position of the storm during this archived sweep. Click only once.
7. After the system finishes the NEXRAD replay, carefully click on the new position for an
instant auto-track.
4.6 Identifying Storms with StormScan
StormScan displays cell-by-cell characteristics of a storm system, letting you easily view and
summarize the characteristics of a storm, including the presence of hail, hail size, storm top
height, storm speed, and the direction in which the storm is traveling. You may also access
tornado signatures, max dBZ, and circulation through StormScan. You can easily review current
and past storm parameters by comparing two consecutive NEXRAD sweeps. In short, StormScan
displays the complete attributes of the storm system, as shown in the following example:
The following tables describe the default color codes used to describe weather characteristics.
The five SCITs in the first table are derived from National Weather Service data:
Description
Color Code and RGB Value
Storms with Tornado Vortex Signature (TVS)
LIGHT RED
TVSAttributeColor=255,0,0
Storms with mesocyclonic activity
DARK RED
MesoAttributeColor=128,0,0
Storms with a chance of severe hail
DARK BLUE
SevHailAttributeColor=0,0,128
Storms with a chance of hail
LIGHT BLUE
HailAttributeColor=0,0,255
Normal thunderstorms
GREEN
StormAttributeColor=0,128,0
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