Quantitative verification statistics for NAM parallel

Real-time NAM parallel test

Evaluation results for NAM parallel:

1. PRECIPITATION THREAT AND BIAS SCORES

2. NEAR-SURFACE STATISTICS

1 December 2016 - 28 February 2017 : Ops vs parallel NAM CONUS/Alaska Nests

The NAM parallel log with further details can be found here.

1. PRECIPITATION THREAT AND BIAS SCORES (CONUS only)

CONUS,
24-60 hour forecasts
NAM parallel

**Eastern US, 24-60 hour forecasts**
NAM parallel

**Western US, 24-60 hour forecasts**
NAM parallel

**CONUS, 24-h forecasts**
NAM parallel

**CONUS, 36-h forecasts**
NAM parallel

**CONUS, 48-h forecasts**
NAM parallel

**CONUS, 60-h forecasts**
NAM parallel

**Eastern U.S., 24-h forecasts**
NAM parallel

**Eastern U.S., 36-h forecasts**
NAM parallel

**Eastern U.S., 48-h forecasts**
NAM parallel

**Eastern U.S., 60-h forecasts**
NAM parallel

**Western U.S., 24-h forecasts**
NAM parallel

**Western U.S., 36-h forecasts**
NAM parallel

**Western U.S., 48-h forecasts**
NAM parallel

**Western U.S., 60-h forecasts**
NAM parallel

2. UPPER AIR STATISTICS

00-60 h forecasts

Parameter CONUS RMS Error CONUS Bias Error Alaska RMS Error Alaska Bias Error

Height X X X X

Temperature X X X X

Relative Humidity X X X X

Specific Humidity X X X X

Wind X X

Parameter	CONUS RMS Error	CONUS Bias Error	Alaska RMS Error	Alaska Bias Error
Height	X	X	X	X
Temperature	X	X	X	X
Relative Humidity	X	X	X	X
Specific Humidity	X	X	X	X
Wind	X		X

3. NEAR-SURFACE STATISTICS - Diurnal Observed vs Forecast Mean

**2-M Temperature**
Eastern US (00z cycle)
Eastern US (12z cycle)
Western US (00z cycle)
Western US (12z cycle)
Alaska (00z cycle)
Alaska (12z cycle)

**2-M Dew Point Temp**
Eastern US (00z cycle)
Eastern US (12z cycle)
Western US (00z cycle)
Western US (12z cycle)
Alaska (00z cycle)
Alaska (12z cycle)

**2-M RH**
Eastern US (00z cycle)
Eastern US (12z cycle)
Western US (00z cycle)
Western US (12z cycle)
Alaska (00z cycle)
Alaska (12z cycle)

**10-M Wind Speed**
Eastern US (00z cycle)
Eastern US (12z cycle)
Western US (00z cycle)
Western US (12z cycle)
Alaska (00z cycle)
Alaska (12z cycle)

4. NEAR-SURFACE STATISTICS - Diurnal RMS and Bias Error vs Observations

**2-M Temperature**
CONUS (00z cycle)
CONUS (12z cycle)
East CONUS (00z cycle)
East CONUS (12z cycle)
West CONUS (00z cycle)
West CONUS (12z cycle)
North East/Central CONUS (00z cycle)
North East/Central CONUS (12z cycle)
South East/Central CONUS (00z cycle)
South East/Central CONUS (12z cycle)
Alaska (00z cycle)
Alaska (12z cycle)

**2-M Dew Point T**
CONUS (00z cycle)
CONUS (12z cycle)
East CONUS (00z cycle)
East CONUS (12z cycle)
West CONUS (00z cycle)
West CONUS (12z cycle)
North East/Central CONUS (00z cycle)
North East/Central CONUS (12z cycle)
South East/Central CONUS (00z cycle)
South East/Central CONUS (12z cycle)
Alaska (00z cycle)
Alaska (12z cycle)

**2-M RH**
CONUS (00z cycle)
CONUS (12z cycle)
East CONUS (00z cycle)
East CONUS (12z cycle)
West CONUS (00z cycle)
West CONUS (12z cycle)
North East/Central CONUS (00z cycle)
North East/Central CONUS (12z cycle)
South East/Central CONUS (00z cycle)
South East/Central CONUS (12z cycle)
Alaska (00z cycle)
Alaska (12z cycle)

**10-M Wind Speed**
CONUS (00z cycle)
CONUS (12z cycle)
East CONUS (00z cycle)
East CONUS (12z cycle)
West CONUS (00z cycle)
West CONUS (12z cycle)
North East/Central CONUS (00z cycle)
North East/Central CONUS (12z cycle)
South East/Central CONUS (00z cycle)
South East/Central CONUS (12z cycle)
Alaska (00z cycle)
Alaska (12z cycle)

**Sea Level Pressure**
CONUS (00z cycle)
CONUS (12z cycle)
East CONUS (00z cycle)
East CONUS (12z cycle)
West CONUS (00z cycle)
West CONUS (12z cycle)
North East/Central CONUS (00z cycle)
North East/Central CONUS (12z cycle)
South East/Central CONUS (00z cycle)
South East/Central CONUS (12z cycle)
Alaska (00z cycle)
Alaska (12z cycle)

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PRIVACY / COLLECTION OF INFORMATION STATEMENT