MET 121 FINAL EXAM (CHS. 9-11)
2025 QUESTIOSN AND ANSWERS
What is the function of the National Center for Environmental Prediction? -
....ANSWER ...-The National Center for Environmental Prediction (NCEP)
receives global weather data from several world meteorological centers many times
each day. The data are analyzed and plotted, and forecasts are prepared and
transmitted to National Center for Environmental Prediction (NCEP).
How does a weather watch differ from a weather warning? - ....ANSWER ...-
Weather watch- Indicates that atmospheric conditions favor hazardous weather
occurring over a particular region during a specified time period. These hazards
may or may not actually develop, and their timing and location are uncertain, so a
watch simply means be on "watch" for that threat and to be prepared to act if
necessary
Weather Warning- Indicates that the hazard now occurring or imminent is
considered to be a threat to life and/or property (tornadoes, thunderstorms, etc)
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
,List at least four tools a weather forecaster might use when making a short-range
forecast - ....ANSWER ...-Doppler radar, surface weather, maps & upper air
winds
How does a prog differ from an analysis? - ....ANSWER ...-Analysis is what
is going on right now and a prog is a forecast
In what ways have high-speed computers assisted the meteorologist in making
weather forecasts? - ....ANSWER ...-Computer-generated weather forecasts
can analyze large quantities of data extremely fast. Each day the many thousands of
observations transmitted to NCEP are fed into a high-speed computer, which
plots and draws lines on surface and upper-air charts. Meteorologists interpret the
weather patterns and then correct any errors that may be present. The routine daily
forecasting of weather by the computer has come to be known as numerical
weather prediction. To help forecasters handle all the available charts and maps,
high-speed data modeling systems using computers are employed.
How are computer-generated forecasts prepared? - ....ANSWER ...-The
models are programmed into the computer, and surface and upper-air observations
of temperature, pressure, moisture, winds, and air density are fed into the
equations. To determine how each of these variables will change, each equation is
solved for a small increment of future time, say, 5 minutes, for a large number of
locations called grid points; each situated a given distance apart. In addition, each
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
, equation is solved for as many as 50 levels in the atmosphere. The results of these
computations are then fed back into the original equations. The computer again
solves the equations with the new "data," thus predicting weather over the
following 5 minutes. The computer then analyzes the data and draws the projected
positions of pressure systems with their isobars or contour lines.
What are some of the problems associated with computer-model forecasts? -
....ANSWER ...-Observations over uninhabited regions
Weather systems crossing boundaries of models
Forecasting small scale evens with larger grids
Suppose that where you live, the middle of January is typically several degrees
warmer than the rest of the month. If you forecast this "January thaw" for the
middle of next January, what type of weather forecast will you have made? -
....ANSWER ...-Climatological
Describe four methods of forecasting the weather and give an example for each
one - ....ANSWER ...-Persistence Forecasts- A prediction that future
weather will be the same as present weather
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 3
2025 QUESTIOSN AND ANSWERS
What is the function of the National Center for Environmental Prediction? -
....ANSWER ...-The National Center for Environmental Prediction (NCEP)
receives global weather data from several world meteorological centers many times
each day. The data are analyzed and plotted, and forecasts are prepared and
transmitted to National Center for Environmental Prediction (NCEP).
How does a weather watch differ from a weather warning? - ....ANSWER ...-
Weather watch- Indicates that atmospheric conditions favor hazardous weather
occurring over a particular region during a specified time period. These hazards
may or may not actually develop, and their timing and location are uncertain, so a
watch simply means be on "watch" for that threat and to be prepared to act if
necessary
Weather Warning- Indicates that the hazard now occurring or imminent is
considered to be a threat to life and/or property (tornadoes, thunderstorms, etc)
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
,List at least four tools a weather forecaster might use when making a short-range
forecast - ....ANSWER ...-Doppler radar, surface weather, maps & upper air
winds
How does a prog differ from an analysis? - ....ANSWER ...-Analysis is what
is going on right now and a prog is a forecast
In what ways have high-speed computers assisted the meteorologist in making
weather forecasts? - ....ANSWER ...-Computer-generated weather forecasts
can analyze large quantities of data extremely fast. Each day the many thousands of
observations transmitted to NCEP are fed into a high-speed computer, which
plots and draws lines on surface and upper-air charts. Meteorologists interpret the
weather patterns and then correct any errors that may be present. The routine daily
forecasting of weather by the computer has come to be known as numerical
weather prediction. To help forecasters handle all the available charts and maps,
high-speed data modeling systems using computers are employed.
How are computer-generated forecasts prepared? - ....ANSWER ...-The
models are programmed into the computer, and surface and upper-air observations
of temperature, pressure, moisture, winds, and air density are fed into the
equations. To determine how each of these variables will change, each equation is
solved for a small increment of future time, say, 5 minutes, for a large number of
locations called grid points; each situated a given distance apart. In addition, each
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
, equation is solved for as many as 50 levels in the atmosphere. The results of these
computations are then fed back into the original equations. The computer again
solves the equations with the new "data," thus predicting weather over the
following 5 minutes. The computer then analyzes the data and draws the projected
positions of pressure systems with their isobars or contour lines.
What are some of the problems associated with computer-model forecasts? -
....ANSWER ...-Observations over uninhabited regions
Weather systems crossing boundaries of models
Forecasting small scale evens with larger grids
Suppose that where you live, the middle of January is typically several degrees
warmer than the rest of the month. If you forecast this "January thaw" for the
middle of next January, what type of weather forecast will you have made? -
....ANSWER ...-Climatological
Describe four methods of forecasting the weather and give an example for each
one - ....ANSWER ...-Persistence Forecasts- A prediction that future
weather will be the same as present weather
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 3
