2 Main Idea: Weather maps are created to organize & describe meteorological (weather) observations.
3 ASPECTS OF WEATHER MAPS TEMPERATURELines on map: ISOTHERMSDescribe: SMOOTH LINECONNECTING AREAS OFEQUAL SURFACETEMPERATURE.PressureLines on map: ISOBARSDescribe: SMOOTH LINECONNECTING AREAS OF EQUAL AIR PRESSURE.
4 RADAR MAPSDescribe: Energy waves are sent out, & the amount reflected back is measured.Reflectivity Effects: The more energy reflected back, the higher the rainfall amount.
5 LIMITATIONS INCLUDEGround clutter and EvaporationGround Clutter: Buildings, elephants, swarmsof bugs, or other energy waves can makestorms look worse than they really ARE!
6 EVAPORATIONWhen water evaporates before it reachesthe ground, it can look like RAIN on a map!
7 MAIN IDEA 2:Weather predictions are not always accurate. However, much information & science goes into each forecast made.
8 5 Forecasting Methods: PERSISTENCE METHOD: DESCRIBE: “The weather tomorrow will be like the weather today.”
9 NUMERICAL MODELS:DESCRIBE: Scientists collect data & computers analyze it to predict weather.
10 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
11 ANALOG METHOD:DESCRIBE: Weather is predicted by comparing current conditions to past conditions that commonly produce bad types of weather.Uses: Predicting SEVERE weather!!
12 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!