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Reports

Analysis of One- to Nine-Day-Out Temperature Forecasts for U.S., Europe, and Asia-Paci c (Calendar Year 2015)

ForcastWatch

ForecastWatch collected over 21 million high and low temperature forecasts from seven commercial forecast providers and the U.S. National Weather Service over the period January 1, 2015 through December 31, 2015. These forecasts were collected for 765 locations in the United States, 141 locations in Europe, and 59 locations in the Asia-Paci c region and compared with 7am to 7pm (MOS) high temperature observations and 7pm to 8am (MOS) low temperature observations in those locations.
Analysis of One- to Nine-Day-Out High Temperature Forecasts for U.S., Europe, and Asia-Pacific (Calendar Year 2014)

ForecastWatch

ForecastWatch collected high temperature forecasts from eight commercial forecast providers and the U.S. National Weather Service over the full calendar year 2014, or January 1, 2014 through December 31, 2014. Nearly 24 million forecasts were collected for over 950 locations in the United States, Europe, and the Asia- Pacific regions. These forecasts were compared with 7 a.m. to 7 p.m. (MOS) high temperature observations in those locations.
Global Weather Corporation had the lowest high temperature forecast error overall for U.S., Europe, and Asia- Pacific. Global Weather Corporation also had the least error for all days-out ranges for U.S., Europe, and Asia- Pacific, though was in a statistical tie for first with MeteoGroup for the 4-6 day-out range for the U.S. and Asia- Pacific.
Six-Month Analysis of High Temperature Forecasts (Calendar Year 2013)

ForecastWatch

ForecastWatch collected high temperature forecasts from eight commercial forecast providers and the U.S. National Weather Service over a period of six-months from July 1, 2013 through December 31, 2013. More than 11 million forecasts were collected for over 900 locations in the United States and Europe. These forecasts were compared with 7 a.m. to 7 p.m. (MOS) high temperature observations in those locations. Global Weather Corporation had the lowest high temperature forecast error overall for both U.S. and Europe. Global Weather Corporation also had the least error for all days-out ranges for Europe, and for two of the three days-out groupings in the U.S. MeteoGroup had the lowest high temperature forecast error in the 4-6 day-out range for the U.S.
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