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WPC Verification
Forecast Products
Quantitative Precipitation Forecasts
How Threat Scores and Bias are Computed
24-Hourly QPF's
Annual WPC Day-1 / Day-2 / Day-3 Threat Scores
and Observed Areal Coverage;
Annual WPC Day-1 / Day-2 / Day-3 Bias
Annual WPC vs. NWP Guidance Threat Scores
1993-2018
Monthly WPC vs. NWP Guidance Threat Scores and Bias
October 2018 to October 2019
Monthly WPC Threat Score and Bias Comparisons (.50", 1.00", 2.00")
October 2018 to October 2019
Monthly WPC Threat Score and Bias Comparisons (Day 1 / Day 2 / Day 3)
October 2018 to October 2019
6-Hourly QPF's
Monthly WPC vs. NWP Guidance Threat Scores
Update
October 2018 to October 2019
Monthly WPC vs. NWP Guidance Threat Scores
Day 1
October 2018 to October 2019
Monthly WPC vs. NWP Guidance Threat Scores
Day 2
October 2018 to October 2019
Monthly WPC vs. NWP Guidance Threat Scores
Day 3
October 2018 to October 2019
WPC vs. NWP Guidance - Threat Scores
November 2018 to October 2019
Days 4-5/6-7 QPF's
Annual WPC Days 4-5/6-7 Threat Scores
and Observed Areal Coverage (2001-2018)
Monthly WPC vs. NWP Guidance Threat Scores and Bias
October 2018 to October 2019
Monthly WPC Threat Score and Bias Comparisons
.50", 1.00", 2.00"
October 2018 to October 2019
5-Day Total QPF's
Monthly WPC vs. NWP Guidance Threat Scores and Bias
October 2018 to October 2019
Monthly WPC Threat Score and Bias Comparisons
.50", 1.00", 2.00", 3.00", 4.00"
October 2018 to October 2019
Medium-Range Forecasts
Overview of data plotted on annual charts
Minimum Temperatures
Annual Mean Absolute Error (MAE) Charts (1972 - 2018)
Monthly Performance Charts (November 2018 - November 2019)
Year-to-Date Performance Chart (January - November 2019)
Maximum Temperatures
Annual Mean Absolute Error (MAE) Charts (1972 - 2018)
Monthly Performance Charts (November 2018 - November 2019)
Year-to-Date Performance Chart (January - November 2019)
Probability of Precipitation (PoP)
Monthly Performance Charts - 24-Hour PoP (November 2018 - November 2019)
Year-to-Date Performance Chart - 24-Hour PoP (January - November 2019)
Monthly Performance Charts - 12-Hour PoP (August 2018 - August 2019)
WPC Gridded Medium-Range Forecasts
How grids are verified
Monthly Performance Charts (August 2019)
Note: MAE = Mean Absolute Error
Forecasts prepared by WPC meteorologists
MOS/WPC/NDFD Minimum Temperature (Days 4-7)
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MAE
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Bias
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MOS/WPC/NDFD Maximum Temperature (Days 4-7)
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MAE
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Bias
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MOS/WPC/NDFD 12-Hour PoP (Days 4-7)
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Brier Score
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Products derived from forecasts prepared by WPC meteorologists
MOS/WPC/NDFD Dew Point Temperature (valid every 6 hours from F90-F180)
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MAE
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Bias
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MOS/WPC/NDFD Wind Speed (valid every 6 hours from F90-F180)
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MAE
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Bias
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MOS/WPC/NDFD Wind Direction (valid every 6 hours from F90-F180)
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MAE
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Bias
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WPC/NDFD Cloud Cover (valid every 6 hours from F90-F180)
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MAE
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Bias
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Mean Sea Level Pressure (PMSL)
WPC -vs- Guidance Anomaly Correlations
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