of station as well as labeled directly to the right of station circle.
VFR (white) – visibility greater than 5 miles and ceiling greater than
MVFR (green) – visibility between 3 and 5 miles and/or ceiling between
1000 and 3000 ft.
IFR (yellow) – visibility less than 3 miles and/or ceiling less than
LIFR (red) – visibility less than or equal to 1 mile and/or ceiling less
than or equal to 500 ft.
VLIFR (purple) – visibility less than or equal to 1/2 mile and/or
ceiling less than or equal to 200 ft.
directly below station circle in hundreds of feet if a ceiling is present.
to the left of station circle. Value is in units normally reported in
METAR for that region. North America reports visibility in statute miles,
most other international areas report visibility in meters. If visibility
is greater than or equal to 6 sm or 10,000 meters, it is omitted from the
symbol is directly to the left of station circle if station is reporting
Direction and Speed
flag used to indicate wind direction and speed. Speed value is in same
units as reported in METAR. Most observations use knots, some countries (Russia
and China) use meters per second
Surface Weather Analysis
Cold fronts are dark blue,
warm fronts are red, occluded fronts are purple, stationary fronts are
alternating red/blue. Surface Troughs are dashed purple lines
white lines representing contours of sea-level pressure. Drawn at 4 mb
intervals and labeled with the pressure (1008 = 1008 mb and 996 = 996 mb).
H denotes center of high sea-level pressure, and red L denotes center of
Low sea-level pressure. Value of central pressure is labeled beneath the
center with the last two digits (1008 = 1008 mb and 996 = 996 mb).
current position of all tropical systems is depicted on the map using
standard symbols. A red "L" denotes a Tropical Depression (wind
speed less than 35 kts), a red tropical symbol with a hole in the middle
denotes a Tropical Storm (wind speed between 35 and 64 kts), and a solid
filled symbol denotes a hurricane/typhoon/tropical cyclone (wind speed
greater than 64 kts).
station reporting present weather is depicted with the appropriate weather
sybmol in yellow at the airport location. To identify the type of weather,
see the map symbol help page.
light blue lines represent contours of current temperature as reported by
all available stations in the region.
maps only. Contains latest NEXRAD base reflectivity overlay.
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