Forecast, each day
Highs
For
The highest temperature of each day for the next seven days: where heat builds and where cold air holds.
-20110 F
Forecast map / Forecast, hour by hour
Forecast temperature map
Over Citizen station CW4743, New Mexico, where the map opens. The whole country
The temperature ahead across the lower 48, Alaska, Hawaii and Puerto Rico, hour by hour, for seven days: warm and cold air on the move. How to read it.
What the temperature map shows
The temperature ahead across the lower 48, Alaska, Hawaii and Puerto Rico, hour by hour to seven days. Played, it shows the day warming and the night cooling, and cold and warm air moving across the country behind the fronts.
How to read it
- Below 0 F
- Dangerous cold; frostbite in minutes with wind.
- 0 to 32 F
- Freezing.
- 32 to 60 F
- Cool.
- 60 to 85 F
- Mild to warm.
- Over 85 F
- Hot; over 100 F, dangerous heat.
What it is for
- Plan the week by the hour.
- Watch a cold front sweep across the country as it plays.
- See when a freeze or a heat wave reaches a place.
How it is made
The forecast maps are drawn from the national blend of the forecast models: the models joined into one forecast and corrected against what each place has measured, on a grid 1.6 miles across, the forecast the country’s forecasters start from. Each of its main runs, four a day, is read whole, laid onto the same grid of latitude and longitude as the radar at 2.8 miles a cell, and played forward from now.
A frame every 3 hours to 3 days, then every 6 hours to 7 days, played from now as a loop of 1 to 7 days. As data: /radar/now.json?show=ft, the times of its frames.
In the Field Book
- Lapse rates and stabilityFB-ENG-005
- Stevenson screen and sitingFB-INS-009
Over a state
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With it
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