A guide to forecast maps
A map is a model
Learn what fronts, pressure lines, and precipitation probabilities can tell you.
Read the symbols
Find the legend, the valid time, and the units before interpreting pressure lines or fronts.
Read the map guide →Keep uncertainty in view
Forecasts cover a time and area, and their precision varies. Probability language needs context.
Read the uncertainty notes →Check the timestamp: a forecast map is valid for a stated period. It is not a live observation of conditions at every location.