The Weather Blog

THE WEATHER BLOG

April 17, 2009|By frank.roylance@baltsun.com

Our April 1 switch to a new weather data vendor for this page has introduced some subtle changes. Several alert readers noticed that the new outfit - Weather Underground - uses a formula that yields precipitation probabilities in increments of 1 percentage point instead of more familiar 10 percent increments. We use them when the WJZ forecasters' predictions are unavailable.

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