Meteorology Chapter 12

Weather vs. Climate The worst weather ever recorded in the United States took place here at the weather station atop Mt. Washington in the White Mts. of New Hampshire. Weather - Climate - the current state of the atmosphere long-term variations in weather for a particular area

Global Winds – complete the diagram below: high low polar easterlies westerlies trade winds

Differences in heating (land vs. water, light vs. dark, rough vs. smooth) cause differences in air pressure which creates winds. During the day the land heats up faster, so in this picture the winds would be coming from the ____________. sea

High Low Sea breeze LowHigh Land breeze Low High Mountain breeze High Low Valley breeze

Fronts Review Which letter would have thunderstorms? Which letter would have steady rains? Which letter would have warm, clear conditions? Which letter would have cold, clear conditions? B C D A

The lines of equal air pressure shown on this map are called _________. The closer together they are, the __________ the winds. isobars stronger

cold front front warm front wave cyclone occluded front stationary front

Use the pictures on the previous slide to help answer the following questions about weather instruments. E A B C D F

Follow the steps below to locate a front and isobars on the diagram to the right: Step 1. Use wind direction to locate the front. Step 2. Use temperatures to identify the type of front. Step 3. Draw and label the 1004 isobar so that every station below 1004 falls toward the “low”. Step 4. Draw and label the 1008 and 1012 isobars

Describe the weather conditions at each of the following cities: Portland – Atlantic City – Chicago - winds SW at 10mph, overcast, drizzle, 34 degrees F winds N at 5 mph, partly cloudy, 36 degrees F winds NW at 20 mph, overcast, light snow, 29 degrees F

Chapter Review Describe the weather conditions for each of the stations below: air pressure mb temp 55 degrees F skies obscured by light rain winds south at 10 mph air pressure mb temp 80 degrees F partly cloudy skies winds NW at 25 mph air pressure 999.7mb temp 30 degrees F skies obscured by moderate snow winds calm

Chapter Review (continued) 1.High pressure means skies will be ________. 2.Lines of equal air pressure are called __________. 3.The instrument that measures wind speed is an ________________. 4.Thunderstorms would most likely be found along a ________ front. 5.The map symbol for a warm front are ____________. 6.Virginia is located in the _____________ wind belt. 7.At the beach during the day the winds would come from the ________. 8.Cold air _________ because it is more dense. 9.A rising barometer would signal __________ weather approaching. 10.Long-term variations in weather for a particular area is ____________. clear isobars anemometer cold semi-circles Westerlies sea sinks clear climate