CBM Numerical Weather Prediction and Forecast Models 2

Question 1

Model Output Statistics (MOS) improve upon raw model output primarily by:

Accepted Answer

Applying statistical relationships derived from historical model errors to correct systematic biases

Answer

MOS uses regression equations built from historical pairs of model output and observed weather to correct known systematic biases in raw model data.

Question 2

The High-Resolution Rapid Refresh (HRRR) model is particularly valuable to broadcast meteorologists because it:

Accepted Answer

Runs hourly with 3 km resolution and explicitly resolves convection across the CONUS

Answer

The HRRR runs every hour with a 3 km grid and uses a convection-allowing configuration, making it highly useful for short-range convective forecasting and live storm coverage.

Question 3

What is 'quantitative precipitation forecast (QPF)' as it appears in NWP model output?

Accepted Answer

A numerical estimate of the total liquid-equivalent precipitation over a specified time period

Answer

QPF is the model's numerical prediction of total liquid-equivalent precipitation accumulation over a defined time interval, expressed in inches or millimeters.

Question 4

Which of the following statements about the Rapid Refresh (RAP) model is correct?

Accepted Answer

It is a regional hourly-updating model covering North America at approximately 13 km resolution

Answer

The RAP is a NOAA hourly-cycling regional model covering North America at roughly 13 km resolution, providing frequently updated guidance for short-range forecasting.

Question 5

In NWP, 'convective parameterization' schemes are used when model grid spacing is too coarse to:

Accepted Answer

Explicitly resolve individual thunderstorm updrafts and downdrafts

Answer

Convective parameterization approximates the bulk effects of sub-grid-scale convection when grid spacing (typically >4 km) is too large to explicitly simulate individual storm-scale circulations.

CBM - Certified Broadcast Meteorologist Practice Test

CBM - Certified Broadcast Meteorologist Practice Test

CBM Numerical Weather Prediction and Forecast Models 2