American Meteorological Society Certification Weather Forecasting and Applied Meteorology

Question 1

What is Numerical Weather Prediction (NWP)?

Accepted Answer

Computer simulation of the atmosphere using mathematical equations to forecast weather

Answer

NWP uses discretized mathematical equations governing atmospheric dynamics and physics to simulate future atmospheric states.

Question 2

What does ensemble forecasting provide compared to a single deterministic model run?

Accepted Answer

Probabilistic forecast information by running multiple model simulations with varied initial conditions

Answer

Ensemble forecasting produces a range of possible outcomes by perturbing initial conditions and model physics, quantifying forecast uncertainty.

Question 3

The Model Output Statistics (MOS) technique improves NWP forecasts by doing what?

Accepted Answer

Applying statistical relationships between model output and observed weather to reduce systematic errors

Answer

MOS uses regression relationships derived from historical model errors and observations to generate bias-corrected, site-specific forecast guidance.

Question 4

What is the primary purpose of data assimilation in NWP?

Accepted Answer

Optimally combining model background fields with new observations to create the best initial state for forecasts

Answer

Data assimilation merges model background states with observations using statistical methods to produce the optimal analysis for initializing NWP forecasts.

Question 5

What is the Probability of Precipitation (PoP) in a weather forecast?

Accepted Answer

The probability that at least 0.01 inches of precipitation will occur at any given point in the forecast area

Answer

PoP represents the probability that a specific point will receive measurable precipitation (≥0.01 inch) during the forecast period.

American Meteorological Society Certification Practice Test

American Meteorological Society Certification Practice Test

American Meteorological Society Certification Weather Forecasting and Applied Meteorology