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  2. Weather forecasting - Wikipedia

    en.wikipedia.org/wiki/Weather_forecasting

    The simplest method of forecasting the weather, persistence, relies upon today's conditions to forecast tomorrow's. This can be valid when the weather achieves a steady state, such as during the summer season in the tropics. This method strongly depends upon the presence of a stagnant weather pattern.

  3. California storm leaves four dead as flooding wipes out homes ...

    www.aol.com/california-forecast-atmospheric...

    Forecasters predicted the rain will begin to ease later on Tuesday. ... We are expecting rain this evening and a surge of heavy rains in a short period of time that may impact tomorrow's commute ...

  4. Probability of precipitation - Wikipedia

    en.wikipedia.org/wiki/Probability_of_precipitation

    Environment Canada reports a chance of precipitation (COP) that is defined as "The chance that measurable precipitation (0.2 mm of rain or 0.2 cm of snow) will fall on any random point of the forecast region during the forecast period." [7] The values are rounded to 10% increments, but are never rounded to 50%. [8]

  5. List of Storm Prediction Center high risk days - Wikipedia

    en.wikipedia.org/wiki/List_of_Storm_Prediction...

    A high risk severe weather event is the greatest threat level issued by the Storm Prediction Center (SPC) for convective weather events in the United States. On the scale from one to five, a high risk is a level five; thus, high risks are issued only when forecasters at the SPC are confident of a major severe weather outbreak.

  6. Flood watches issued as another round of wet winter storms ...

    www.aol.com/news/flood-watches-issued-another...

    California's central coast is at risk of “significant flooding,” with up to 5 inches (12 cm) of rain predicted for many areas, according to the weather service. Isolated rain totals of 10 ...

  7. Wet winter storm hits California, closing regional airport ...

    www.aol.com/news/california-again-braces...

    The National Weather Service had warned that California’s central coast was at risk of “significant flooding,” with up to 5 inches (12 cm) of rain predicted for many areas and isolated rain ...

  8. Numerical weather prediction - Wikipedia

    en.wikipedia.org/wiki/Numerical_weather_prediction

    The ENIAC main control panel at the Moore School of Electrical Engineering operated by Betty Jennings and Frances Bilas. The history of numerical weather prediction began in the 1920s through the efforts of Lewis Fry Richardson, who used procedures originally developed by Vilhelm Bjerknes [1] to produce by hand a six-hour forecast for the state of the atmosphere over two points in central ...

  9. Dramatic weather changes predicted across US this week - AOL

    www.aol.com/weather/dramatic-weather-changes...

    A major thaw is forecast for the recently winter-bombarded south-central United States, where millions of Americans have been struggling to stay warm this past week. Even though temperature swings ...