# Met1010 final 1-50

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### A weather warning indicates that

Hazardous weather is either imminent or occurring within the forecast area

### A weather watch would probably be issued for which of the following conditions?

There is a chance for tornadoes tomorrow

### An analysis is:

A surface or upper-level chart that interprets the present weather patterns

### A forecast of an extended period of dry weather would be made for a region beneath:

An upper-level ridge

Warm and raining

### The least accurate forecast method of predicting the weather two days into the future during changeable weather conditions is usually the:

Persistence forecast

### Weather forecast that predicts that the future weather will be the same as the present weather is called:

Persistence forecasting

### A persistence forecast could be quite accurate when:

You are positioned in the middle of a large, stationary air mass

Nowcasting

All of the above

Analogue

### A forecast method that compares past weather maps and weather patterns to those of the present is:

The analogue method

### The forecasting technique that produces several versions of a forecast model, each beginning with slightly different weather information to reflect errors in the measurements, is called:

Ensemble forecasting

### 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, you would have made a:

Climatological forecast

### A probability forecast that calls for a "40 percent chance of rain" means that:

There is a 40% chance of rain that any random place in a forecasted area can receive measurable rain

All of the above

### An accurate forecast:

May or may not show skill

### For a forecast to show skill it must:

Be better than a persistence forecast or a climatological forecast

### A prog is:

The final forecast chart representing the atmosphere at a specified future time called a prognostic chart (prog)

### The forecasting of weather by a computer is known as:

Numerical weather prediction

### The greatest improvement in forecasting skill during the past 30 years has been made in forecasting:

Sever storm warnings for hurricanes and tornadoes

### Automated Surface Observing Systems (ASOS) measure:

Wind, temperature, pressure, cloud - base height, and runway visibility at various airports

Backing wind

### Warm advection is most likely to occur:

From the surface up to the 500mb level ahead of an advancing warm front

False

Back; cold

### When making a forecast, a meteorologist typically examines:

Surface charts, upper air charts, radar display, satellite imagery (all of the above)

### Modern computer forecasting models have increasingly smaller grid spacing. This presents which of the following problems?

Much more computations are needed

### Very short-range forecasts often utilize which of the following forecast methods?

Subjective interpretations of surface observations, satellite imagery and Doppler radar information

Isallobars

### A comma cloud is:

A band of organized cumuliform clouds that look like a comma on a satellite photograph

### If you wanted to make a persistence forecast of minimum and maximum temperatures for a particular city, which type of chart would be most helpful?

A surface weather map

Rising air

Cumulus stage

### Ordinary thunderstorms only last about one hour and begin to dissipate when:

The downdraft spreads throughout the cloud and cuts off the updraft

### An ordinary thunderstorm is a:

Scattered or isolated storm that is not severe

Dissipating

Mature

Afternoon

### Severe thunderstorms are different from ordinary thunderstorms in that severe thunderstorms:

Have a tilted updraft in the mature stage

### A supercell storm is:

An enormous thunderstorm that last for several hours

### Severe thunderstorms are capable of producing:

Large hail, tornadoes, flash floods (all of the above)

### In a severe thunderstorm, hail may:

Fall from the base of the anvil, fall from the bottom of the cloud, be tossed out the side of cloud (all of the above

### A Mesoscale Convective Complex is actually:

Individual thunderstorms that grow into a large, long - lasting weather system

Have rotating updrafts

### The downdraft in an ordinary thunderstorm is created mainly by:

Evaporating raindrops that make the air cold and heavy

A roll cloud

Gust front

Mesohigh

Example: