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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
1993-2021
Monthly WPC vs. NWP Guidance Threat Scores and Bias
December 2021 to December 2022
Monthly WPC Threat Score and Bias Comparisons (.50", 1.00", 2.00")
December 2021 to December 2022
Monthly WPC Threat Score and Bias Comparisons (Day 1 / Day 2 / Day 3)
December 2021 to December 2022
6-Hourly QPF's
Monthly WPC vs. NWP Guidance Threat Scores
Update
December 2021 to December 2022
Monthly WPC vs. NWP Guidance Threat Scores
Day 1
December 2021 to December 2022
Monthly WPC vs. NWP Guidance Threat Scores
Day 2
December 2021 to December 2022
Monthly WPC vs. NWP Guidance Threat Scores
Day 3
December 2021 to December 2022
WPC vs. NWP Guidance - Threat Scores
October - December 2022
Days 4-5/6-7 QPF's
Annual WPC Days 4-5/6-7 Threat Scores
and Observed Areal Coverage (2001-2021)
Monthly WPC vs. NWP Guidance Threat Scores and Bias
December 2021 to December 2022
Monthly WPC Threat Score and Bias Comparisons
.50", 1.00", 2.00"
December 2021 to December 2022
5-Day Total QPF's
Monthly WPC vs. NWP Guidance Threat Scores and Bias
December 2021 to December 2022
Monthly WPC Threat Score and Bias Comparisons
.50", 1.00", 2.00", 3.00", 4.00"
December 2021 to December 2022
Medium-Range Forecasts
Overview of data plotted on annual charts
Minimum Temperatures
Annual Mean Absolute Error (MAE) Charts (1972 - 2021)
Monthly Performance Charts (December 2021 - December 2022)
Year-to-Date Performance Chart (January - December 2022)
Maximum Temperatures
Annual Mean Absolute Error (MAE) Charts (1972 - 2021)
Monthly Performance Charts (December 2021 - December 2022)
Year-to-Date Performance Chart (January - December 2022)
Probability of Precipitation (PoP)
Monthly Performance Charts - 24-Hour PoP (December 2021 - December 2022)
Year-to-Date Performance Chart - 24-Hour PoP (January - December 2022)
Monthly Performance Charts - 12-Hour PoP (December 2018 - December 2019)
WPC Gridded Medium-Range Forecasts
How grids are verified
Monthly Performance Charts (December 2019)
Note: MAE = Mean Absolute Error
Forecasts prepared by WPC meteorologists
NBM/WPC/NDFD Minimum Temperature (Days 4-7)
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MAE
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Bias
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NBM/WPC/NDFD Maximum Temperature (Days 4-7)
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MAE
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Bias
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NBM/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
NBM/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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NBM/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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NBM/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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