US weather forecast map
The National Weather Service national forecast chart: fronts, high and low pressure centers, and the areas expected to get rain, storms or wintry weather.
Day
Fronts and pressure
- Cold front
- Blue line with triangles pointing the way the front is moving.
- Warm front
- Red line with half circles pointing the way the front is moving.
- Stationary front
- Alternating blue triangles and red half circles on opposite sides of the line.
- Occluded front
- Purple line with triangles and half circles on the same side.
- Trough
- Dashed brown line.
- H and L
- Blue H marks a center of high pressure; red L marks a center of low pressure.
Shaded areas
- Rain
- Solid shading.
- Rain/Thunderstorms
- Dotted pattern.
- Mixed Precipitation
- Solid shading.
- Freezing Rain Possible
- Diagonal stripes.
- Heavy Rain/Flash Flooding Possible
- Diagonal stripes.
- Severe Thunderstorms Possible
- Diagonal stripes.
The key inside each map lists the shading used that day.
Source: NOAA/NWS Weather Prediction Center, public domain. This site is not endorsed by NOAA. See also the rain forecast and the snow forecast.