Forecast total
Rain total
For
All the rain forecast from now to each frame, in inches: the week’s rain adding up, and where it builds highest.
.0112 in
Forecast map / Forecast amount
Forecast rain, each 6 hours
Over Flash Flood Warning for Kane, UT, where the map opens. The whole country
How much rain will fall in each 6 hours, in inches, snow as its water: the bands of rain crossing storm by storm. How to read it.
The rings are the storms the radars detect, the larger ring a severe one; each line runs to where its storm will be in an hour if it keeps its present speed and heading. Rotation and hail are what the radars detect and the analysis measures, not warnings: the official watches and warnings in force are drawn on the map in their own colours and set out in full under Alerts.
What the rain, 6 hours map shows
How much rain will fall in each 6 hours, in inches, with snow counted as the water it melts to. Played, the bands of rain cross the country storm by storm.
How to read it
- Under 0.1 in
- Light rain.
- 0.1 to 0.5 in
- Steady rain.
- 0.5 to 1 in
- Heavy rain.
- Over 1 in
- Very heavy rain; flooding possible.
- Over 2 in
- Flooding likely.
What it is for
- Time the wettest hours of a storm.
- See the heaviest band of a front before it arrives.
- Plan outdoor work in the dry hours between.
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 6 hours for 7 days, played as a loop of 1 to 7 days. As data: /radar/now.json?show=fqpf, the times of its frames.
In the Field Book
- Flash floodFB-EVT-100
Over a state
AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareDistrict of ColumbiaFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming
With it
Severe AlertsWeather by stateForecast accuracyInstrument atlas
Beside it
Forecast, each 12 hours
Chance of rain
For
The chance of rain or snow in each 12 hours, day and night, for seven days: when to expect it, and how surely.
0100%
Falling now
Rain rate
Latest
How hard rain and snow are falling at this moment, in inches of water an hour, a new picture every two minutes.
.014 in an hour