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### 14 Cards in this Set

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 HURRICANE -a tropical cyclone having winds in excess of 64 knots (74mi) DISTINGUISH BETWEEN A TROPICAL DISTURBANCE, TROPICAL DEPRESSION, TROPICAL STORM, AND HURRICANE. These are all various stages of hurricanes. -TROPICAL DISTURBANCE=cluster of clouds -TROPICAL DEPRESSION= cluster of clouds with central circulation -TROPICAL STORM=the winds are 39 mph and it is given a name -HURRICANE=wind speeds 74 mph or higher. WHEN DOES A TROPICAL CYCLONE GET A NUMBER? A NAME? A tropical cyclone receives a name when it is a tropical storm. Its winds are 39 mph. WHAT ARE THE DIFFERENT TERMS USED TO IDENTIFY TROPICAL CYCLONES IN DIFFERENT OCEAN BASINS? -hurricane= forms over the warm northern Atlantic and eastern North Pacific Oceans -typhoon= western North Pacific -India=cyclone -Australia=tropical cyclone -everywhere= tropical cyclone HOW ARE HURRICANES NAMES DETERMINED? (HOW DOES A FORECASTER KNOW WHAT THE NEXT HURRICAN NAMED?) There are lists that are utilized. When they run out of names they go to the greek alphabet. DESCRIBE THE CHARACTERISITICS OF NAME LISTS. -alphabetical -skips certain letters -it goes female/male -the names are from the areas in which the hurricane will go through, the areas that will be affected. DESCRIBE THE HURRICANE INTENSITY RANKING SCALE. The hurricane intensity ranking scale is called the Saffir-Simpson Scale. It's based on max. sustained wind. With this scale we know winds speed and likely damage. COMPARE AND CONTRAST THE RANKING SCALES FOR HURRICANES AND TORNADOES. The scale utilized for tornadoes catagorizes the tornado after the damage has been done. With the Saffir-Sampson Scale we know the likely damage before hand. WHAT FIVE ENVIRONMENTAL CONDITIONS ARE NECESSARY FOR HURRICAN FORMATION? 1. warm ocean water 2. deep warm water 3. no/little wind shear 4. moisture: high RH in troposphere 5. north/south of equator 5 degrees IF A HURRICANE IS MOVING WESTWARD AT 10 MPH WILL THE STRONGEST WINDS BE NORTH OR SOUTH? EXPLAIN. The strongest winds are usually on its north. The reason for this phenomenon is that the winds that push the storm along add to the winds on the north side and subtract from the winds on the south. WHAT THREE FACTORS WEAKEN HURRICANES? 1. cold water 2. speed sheer 3. land HOW HAVE SATELLITES AIDED IN HURRICANE FORECASTING IN THE PAST 30 YEARS? Satellite images help us to see where the hurricanes are headed and can evne give us the wind speeds and rainfall estimates. WHAT IS ENSEMBLE FORECASTING? HOW IS IT USED IN HURRICANE PREDICTION. Ensemble forecasting is a numerical weather prediction in which we run many different computer models and compare them. COMPARE AND CONTRAST EXTRATROPICAL CYCLONES. -Tropical cyclones get their energy from warm water. Extratropical cyclones get their energy from warm moist air. Tropical cyclones are 300-500 miles. Extratropical cyclones are 1,000 miles. -Tropical cyclones can last from days to three weeks. Extrapocial cyclones last 3-7 days. -Tropical cyclones move from east to west. Extratropical cyclones move from west to east. -Tropical cyclones have low pressure and a clear eye. Extratropical cyclones have low pressure and the eye is cloudy. -Tropical cyclones have cyclonic winds that go 75-155 mph. Extratropical cyclones have cyclonic winds that are 5-50 mph.