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Weather Terms
| Question | Answer |
|---|---|
| Squall Line | A fast moving cold front with a narrow band. The band is parallel to the front..a line of storms |
| Hurricane | Tropical cyclone with sustainable 70+MPH winds |
| Tropical Storm | tropical storms with wind speeds up to 30-73MPH |
| High Atmospheric pressure | area where air press is higher than surrounding pressure |
| Eye | The center of the hurricane..calmest part |
| Eye Wall | The barrier that separates the eye from the storm |
| Storm Surge | When the lose pressure eye creates a mound of water..most dangerous part |
| Wind Gust | sudden increase of wind |
| Watch-hurricane | hurricane will hit within 36 hours |
| Warning-hurricane | hurricane will hit within 24 hours |
| Winds are 112-131..damage small utility buildings and poorly constructed signs | Category 3 hurricane |
| What caused Hurricane to turn towards Eastcoast | High pressure front |
| A full moon during Sandy caused... | the storm surge to become higher. |
| A hurricane weakens when... | it moves over land |
| The Saffin -Simpson Scale measures... | A hurricanes wind speed and damage |
| Warm Front | warm air mass displaces a cold air mass |
| A warm front brings this kind of weather | clear skies...light precipitation |
| Cold Front | cold air mass pushes a warm front away from it |
| A cold front brings this kind of weather | drop in temperature, heavy rain, storms, wind snow..severe weather |
| Occluded | cold front follows behind a warm front..the cold front moves faster and overtakes |
| The Fujita Scale..measures | damage after a tornado has moved through. |
| funnel cloud | fast spinning funnel of air |
| vortex | when air and liquid spin |
| dry line thunderstorm | a line that separates moist air mass from a dry air mass..off the Gulf of Mexico |
| Straight line winds | wind that comes out of a thunderstorm..produced in a downdraft |
| downdraft | downward moving air currents of cold dense air |
| downburst | concentrated are of strong wind produced by a convection downdraft |
| microburst | small pocket of intense wind |
| derecho | A line of intense, widespread, fast-moving windstorms and thunderstorms |
| Joplin tornado | 200 MPH winds..EF5. Had multiple vortexes |
| gust front | leading edge of cool air rushing down and out of a storm. |
| front | the boundary where two air masses meet |
| supercell | A thunderstorm with a mesocyclone(one deep rotating updraft) |
| updraft | air current that moves upwards |
| straight line wind-dorecho damage | damage will be in line with how the wind was blowing ..straight |
| Tornado damage | debris will be scattered in all different directions |
| Doppler Radar | detects changes in frequency/wavelengths resulting from storm motions |
| TVS Tornado Votex Signature | Doppler radar requirement-strength, vertical depth, and time continuity ..this increase probability of a tornado |
| Sprite | upper atmosphere lightning..positively cloud to ground..25-55 miles above the thunderstorm occur usually in mesoscale, not supercell |
| jet | lightning propelled upward..up to 12 miles from the top..very difficult to see |
| mesoscale | weather systems such as sea breezes, squall lines and mesoscale convection complexes |
| 3 main wind belts | easterly trade winds, prevailing westerlies and polar easterlies |
| doldrums | region near equator where trade winds from each hemisphere meet-hot humid weather/light winds |
| continental tropical..forms? | over land at low latitudes |
| maritime tropical..forms? | over sea at low latitudes |
| continental polar..forms? | over land at high latitudes |
| maritime Polar...forms? | over water at high latitudes |
| severe weather | any weather even that is disruptive or destructive to human life and property |
| Thunderstorms are severe when.... | one or more- Hail (3/4+ in diameter)wind gusts in excess of 50 knots(57.5 MPH) One or more tornadoes |
| Thunderstorm stages | Developing, Mature, Dissipating |
| isobars | are lines of pressure |
| isotherms | bands of temperature |
| mid latitude cyclone | cyclone that is in a low pressure area with counterclockwise in N. Hemisphere..clockwise in S. Hemisphere |
| tropical depression | sustained winds of 33 knots or less |
| Warning -tornado | a tornado has been visibly spotted |
| Watch-tornado | the conditions are likely for a tornado to form |
| trade winds | winds moving towards equator |
| prevailing westerlies | winds that move from west to east towards the poles |
| polar easterlies | air flowing away from the poles and turn towards the west |
| United States and Canada's weather patterns come from which Global wind? | prevailing westerlies |
| semi permanent high/low | regions of high and low pressure that persist through the year and influence US weather |
| How dust storms form | air is forced down and pushed forward by a thunderstorm cell |
| Aleatian Low | found over Gulf of Alaska Steers storms into Pacific NW in winter |
| Iceland Low | cyclones converge and intensify during winter.found near Iceland |
| Bermuda High | In Atlantic off East coast of US |
| Directs paths of Hurricanes..makes summer months wet/humid on East coast | Bermuda High |
| Pacific High | West coast of N America..clockwise winds |
| Keeps west coast dry during summer | Pacific High |
| Brings storms into coast making winter wet across Western US | Pacific High |
| lightning detector | ground, mobil and space.. |
Created by:
kdurak
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