G-AIRMET Help

Interactive Display

The interactive G-AIRMET display shows the following hazard types:

  • Turb Hi - Upper level turbulence.
  • Turb Lo - Lower level turbulence.
  • LLWS - Low Level Wind Shear.
  • Sfc Winds - Strong surface winds.
  • Icing - Icing.
  • Freezing Level - Freezing level (line) and multiple freezing levels (polygon).
  • Ceil&Vis (IFR) - Low ceilings and visibility.
  • Mtn Obscuration - Areas where mountains obscured.

Each type of hazard is colored differently. Each area labeled with hazard. Endpoints of freezing level lines have level in 100s of feet. Multiple freezing levels labeled with top and bottom level.

Figure 1: G-AIRMET polygon colors

A time selector is available to cycle through each forecast out to 12 hours. G-AIRMETs can be filtered by altitude range by adjusting the Top and Bottom selectors.

The G-AIRMETs are all clickable to access the raw text of the product.

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.
  • turbhi={on|off} - This turns the high level turbulence layer on or off. The default is on.
  • turblo={on|off} - This turns the low level turbulence layer on and off. The default is on.
  • llws={on|off} - This turns the low level wind shear layer on and off. The default is on.
  • sfcwind={on|off} - This turns the surface wind layer on and off. The default is on.
  • icing={on|off} - This turns the icing layer on and off. The default is on.
  • frzlvl={on|off} - This turns the freezing level layer on and off. The default is on.
  • ifr={on|off} - This turns the ceiling and visibility layer on and off. The default is on.
  • mtnobs={on|off} - This turns the mountain obscuration layer on and off. The default is on.
  • fore={0|3|6|9|12} - This sets the forecast time. The default is the first available valid time ahead of current time.
  • top=### - This sets the top level for SIGMETs. The default is undefined.
  • bottom=### - This sets the bottom level for SIGMETs. The default is undefined.
  • 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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