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Common terms and phrases50th degree north Air Wet Ther appearance April 20th area of high areas of low atmospheric barometer British Columbia British Northwest California Coast Cape Mendocino Cascade Mountains Cascade Ranges central Chinook winds cloudiness Columbia River degree north latitude dynamic heating east Eastern Washington evaporation fair weather high barometric pressure high pressure move high temperature influence Lakes low pressure moisture Montana Monthly Weather Review morning reports move eastward movement mrmeter Nevada North Pacific Coast North Pacific Slope northeast November 12 occur ocean Oregon and Washington Pacific Northwest portions of Washington Portland predictions rain Rocky Mountains Roseburg snow Southern Idaho southward summer high Summer type Tatoosh Island thence thunder storms type of weather U. S. Weather Bureau Valley Vancouver Island Walla Walla warm southerly wind Washington and Oregon weather changes weather conditions Weather Forecasting WEATHER TYPES Western Oregon western portions Willamette Valley winter season winter storm Winter type Popular passagesPage 14 - Bureau stations throughout the country for publication on the maps. Solid lines, called isobars, are drawn through points having the same atmospheric pressure; a separate line being drawn for each difference of one-tenth of an inch in the height of the barometer. Dotted lines, called isotherms, connecting places having the same temperature, are drawn for each ten degrees of the thermometer. Heavy dotted lines, inclosing areas where a decided change in temperature has occurred within the last twenty-four... Page 14 - Solid lines, called isobars, are drawn through points having the same pressure, a separate line being drawn for each difference of one-tenth of an inch in the height of the barometer. Dotted lines, called isotherms, connecting places having the same temperature, are drawn for each ten degrees of the thermometer. Heavy dotted lines, inclosing areas where a great change in temperature has occurred within the last twenty-four hours, are sometimes added. The direction of the wind is indicated by an arrow... Page 14 - Canada, showing the stations where weather observations are taken daily at eight AM and eight PM, seventy-fifth meridian time, and telegraphed to Washington and other cities. These observations consist of readings of the barometer, thermometer (dry and wet), direction and velocity of wind, state of sky (whether cloudy or otherwise) and amount of rain or snow. Solid lines, called isobars, are drawn through points having the same pressure, a separate line being drawn for each difference of one-tenth... Page 19 - ... obtain the beneficial effects of the reduction of temperature by evaporation the shade must be sought and the direct sun's rays avoided. The effects may be heightened by a natural or artificial breeze or wind, and for parts of the body covered by clothing they may be obtained by adapting the clothing to the free passage of air and moisture. For hot weather and in the shade the color of the clothing is of less consequence than its texture, together with sufficient looseness to permit of the free... Page 11 - ... occurring on the eastern slopes of the mountains of the Northwest, beginning at any hour of the day and continuing from a few hours to several days." Others make the definition somewhat broader. According to them this wind is defined as a warm, dry wind from the southeast, south, or southwest when west of the Rocky Mountains, and from the southwest, west, or northwest when east of the Rocky Mountains, beginning at any hour of the day or night, and continuing from a few hours to several days. Page 19 - ... avoided. The effects may be heightened by a natural or artificial breeze or wind, and for parts of the body covered by clothing they may be obtained by adapting the clothing to the free passage of air and moisture. For hot weather and in the shade the color of the clothing is of less consequence than its texture, together with sufficient looseness to permit of the free access of air. The reduction of temperature by evaporation may be increased by many devices for making an artificial breeze (as... Page 12 - ... referred to. After having thus explained and established in general terms this new method of presenting the thermo-dynamic processes peculiar to the atmosphere their applicability will now be elucidated by a few examples. (1) Thefoehn. Moist air expands during its rise up the side of a mountain chain, and is then again compressed in its descent without having any heat added or withdrawn. 4\r« This is represented by a diagram, as shown in Fig. Page 14 - ... Heavy dotted lines, inclosing areas where a great change in temperature has occurred within the last twenty-four hours, are sometimes added. The direction of the wind is indicated by an arrow flying with the wind, or opposite to the ordinary vane, and has a square end when storm signals are displayed. Shaded areas show where rain or snow has been falling since the last observation. The general movement of storms in the United States is from west to east, similar to a series of atmospheric waves,... Page 18 - If the air were as moist as that found in the region of the Great Lakes, and along the Atlantic seaboard, and the temperature as high as it now is at times, the effect of the heat might be injurious. Bibliographic information
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