CWA/MIS Help

Interactive Display

The interactive map shows both Center Weather Advisories (CWAs) and Meteorological Impact Statements (MISs). The CWAs show up as polygons for the hazard area. The outlines of the polygons are black to make them distinctive from SIGMETs. The polygons are filled based on hazard type (See Fig. 1).

Figure 1: CWA polygon colors

MIS are display as yellow circles in the middle of the ARTCC region. Only regions with a valid MIS are shown.

Figure 2: MIS symbol

Each polygon or circle is clickable to obtain the text of the advisory or statement.

URL Options

Here is a list of the URL options:

  • date=yyyymmddhhnn - This selects a specific date and time to display. The ADDS database stores roughly a weeks worth of METAR data. Selecting a specific date will display METARs valid for that time.
  • center=lat,lon - This will center the map at a specific latitude and longitude. The default is 39,-97.
  • zoom=level - This sets the zoom level. The default is 4. A higher number zooms in. A lower number zooms out.
  • basemap={light|dark|simple} - This selects the type of basemap. The default is light.
  • cwa={on|off} - This turns on and off the CWA layer. The default is on.
  • mis={on|off} - This turns on and off the MIS layer. The default is on.
  • highways={on|off} - Turns highway layer on or off. These are primarily interstates. The default is off.
  • jetroutes={on|off} - Turns the top jetroutes layer on or off. The default is off.
  • firs={on|off} - Turns the FIR layer on or off. The default is off.
  • hover={on|off} - Turns on hover for features. The popups will come up when mouse hovers. Default is off.


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