12.4 notes weather analysis
DESCRIPTION
12.4 Notes Weather Analysis. Main Idea: Weather maps are created to organize & describe meteorological (weather) observations. ASPECTS OF WEATHER MAPS TEMPERATURE Lines on map: ISOTHERMS Describe: SMOOTH LINE CONNECTING AREAS OF EQUAL SURFACE TEMPERATURE. Pressure - PowerPoint PPT PresentationTRANSCRIPT
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12.4 Notes Weather Analysis
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• Main Idea: Weather maps are created to organize & describe meteorological (weather) observations.
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• ASPECTS OF WEATHER MAPS
TEMPERATURELines on map: ISOTHERMSDescribe: SMOOTH LINECONNECTING AREAS OFEQUAL SURFACE TEMPERATURE.
PressureLines on map: ISOBARS
Describe: SMOOTH LINECONNECTING AREAS OF EQUAL AIR PRESSURE.
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• RADAR MAPS
Describe: Energy waves are sent out, & the amount reflected back is measured.
Reflectivity Effects: The more energy reflected back, the higher the rainfall amount.
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• LIMITATIONS INCLUDEGround clutter and Evaporation
Ground Clutter: Buildings, elephants, swarmsof bugs, or other energy waves can make storms look worse than they really ARE!
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• EVAPORATION
When water evaporates before it reachesthe ground, it can look like RAIN on a map!
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• MAIN IDEA 2: Weather predictions are not always accurate. However, much information & science goes into each forecast made.
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PERSISTENCE METHOD: DESCRIBE:“The weather tomorrow will be like the weather today.”
5 Forecasting Methods:
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• NUMERICAL MODELS: DESCRIBE: Scientists collect data & computers analyze it to predict weather.
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CLIMATOLOGY METHOD: DESCRIBE: Weather on a particular day willbe close to the average weather of that same date of past years.
Uses: Long-term forecasts
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ANALOG METHOD: DESCRIBE: Weather is predicted by comparing current conditions to past conditions that commonly produce bad types of weather. Uses: Predicting SEVERE weather!!
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TRENDS METHOD: DESCRIBE: By looking at a storm’s startingpoint, direction, & speed & by understandingpressure & winds, the arrival of rain, snow, or hail storms are predicted.Uses: Predicting ARRIVAL of precipitation!