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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
1993-2012
Monthly WPC vs. NWP Guidance Threat Scores and Bias
January 2012 to January 2013
Monthly WPC Threat Score and Bias Comparisons (.50", 1.00", 2.00")
January 2012 to January 2013
Monthly WPC Threat Score and Bias Comparisons (Day 1 / Day 2 / Day 3)
January 2012 to January 2013
6-Hourly QPF's
Monthly WPC vs. NWP Guidance Threat Scores
Update
January 2012 to January 2013
Monthly WPC vs. NWP Guidance Threat Scores
Day 1
January 2012 to January 2013
Monthly WPC vs. NWP Guidance Threat Scores
Day 2
January 2012 to January 2013
Monthly WPC vs. NWP Guidance Threat Scores
Day 3
January 2012 to January 2013
WPC vs. NWP Guidance - Threat Scores
February 2012 to January 2013
Days 4-5 QPF's
Monthly WPC vs. NWP Guidance Threat Scores and Bias
January 2012 to January 2013
Monthly WPC Threat Score and Bias Comparisons
.50", 1.00", 2.00"
January 2012 to January 2013
5-Day Total QPF's
Monthly WPC vs. NWP Guidance Threat Scores and Bias
January 2012 to January 2013
Monthly WPC Threat Score and Bias Comparisons
.50", 1.00", 2.00", 3.00", 4.00"
January 2012 to January 2013
Medium-Range Forecasts
Overview of data plotted on annual charts
Minimum Temperatures
Annual Mean Absolute Error (MAE) Charts (1972 - 2012)
Monthly Performance Charts (January 2011 - January 2012)
Year-to-Date Performance Chart (January-December 2012)
Maximum Temperatures
Annual Mean Absolute Error (MAE) Charts (1972 - 2012)
Monthly Performance Charts (January 2011 - January 2012)
Year-to-Date Performance Chart (January-December 2012)
Probability of Precipitation (PoP)
Monthly Performance Charts - 24-Hour PoP (January 2011 - January 2012)
Year-to-Date Performance Chart - 24-Hour PoP (January-December 2012)
Monthly Performance Charts - 12-Hour PoP (January 2012 - January 2013)
WPC Gridded Medium-Range Forecasts
How grids are verified
Monthly Performance Charts (January 2013)
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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