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Weather front

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50: 1000:(MCS) forming at the point of the upper level split in the wind pattern running southeast into the warm sector parallel to low-level thickness lines. When the convection is strong and linear or curved, the MCS is called a squall line, with the feature placed at the leading edge of the significant wind shift and pressure rise. Even weaker and less organized areas of thunderstorms lead to locally cooler air and higher pressures, and outflow boundaries exist ahead of this type of activity, which can act as foci for additional thunderstorm activity later in the day. 1085:, but do not move as quickly. Cold fronts and occluded fronts in the Northern Hemisphere usually travel from the northwest to southeast, while warm fronts move more poleward with time. In the Northern Hemisphere a warm front moves from southwest to northeast. In the Southern Hemisphere, the reverse is true; a cold or occluded front usually moves from southwest to northeast, and a warm front moves from northwest to southeast. Movement is largely caused by the pressure gradient force (horizontal differences in atmospheric pressure) and the 33: 1164: 339:, although any direction is possible. Occluded fronts are a hybrid merge of the two, and stationary fronts are stalled in their motion. Cold fronts and cold occlusions move faster than warm fronts and warm occlusions because the dense air behind them can lift as well as push the warmer air. Mountains and bodies of water can affect the movement and properties of fronts, other than atmospheric conditions. When the 603: 804: 1030: 816:
the boundary can be either warm or cold. In a cold occlusion, the air mass overtaking the warm front is cooler than the cold air mass receding from the warm front and plows under both air masses. In a warm occlusion, the cold air mass overtaking the warm front is warmer than the cold air mass receding from the warm front and rides over the colder air while lifting the warm air.
688:. Low pressure also creates surface winds deriving from high pressure zones and vice versa. Various symbols are used not just for frontal zones and other surface boundaries on weather maps, but also to depict the present weather at various locations on the weather map. In addition, areas of precipitation help determine the frontal type and location. 1043:(showers, thundershowers, heavy rain and related unstable weather) is caused by air being lifted and condensing into clouds by the movement of the cold front or cold occlusion under a mass of warmer, moist air. If the temperature differences of the two air masses involved are large and the turbulence is extreme because of 1073:
However, precipitation along warm fronts is relatively steady, as in light rain or drizzle. Fog, sometimes extensive and dense, often occurs in pre-warm-frontal areas. Although, not all fronts produce precipitation or even clouds because moisture must be present in the air mass which is being lifted.
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is precipitation created through the lifting action of air due to air masses moving over terrain such as mountains and hills, which is most common behind cold fronts that move into mountainous areas. It may sometimes occur in advance of warm fronts moving northward to the east of mountainous terrain.
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can also occur preceding a warm frontal passage. Clearing and warming is usually rapid after frontal passage. If the warm air mass is unstable, thunderstorms may be embedded among the stratiform clouds ahead of the front, and after frontal passage thundershowers may still continue. On weather maps,
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will form downwind of north–south oriented mountain chains, leading to the formation of a lee trough. Near the surface during daylight hours, warm moist air is denser than dry air of greater temperature, and thus the warm moist air wedges under the drier air like a cold front. At higher altitudes,
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A wide variety of weather can be found along an occluded front, with thunderstorms possible, but usually their passage is also associated with a drying of the air mass. Within the occlusion of the front, a circulation of air brings warm air upward and sends drafts of cold air downward, or vice versa
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is formed when a cold front overtakes a warm front, and usually forms around mature low-pressure areas, including cyclones. The cold and warm fronts curve naturally poleward into the point of occlusion, which is also known as the triple point. It lies within a sharp trough, but the air mass behind
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Warm fronts are at the leading edge of a homogeneous advancing warm air mass, which is located on the equatorward edge of the gradient in isotherms, and lie within broader troughs of low pressure than cold fronts. A warm front moves more slowly than the cold front which usually follows because cold
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When stationary fronts become smaller in scale and stabilizes in temperature, degenerating to a narrow zone where wind direction changes significantly over a relatively short distance, they become known as shearlines. A shearline is depicted as a line of red dots and dashes. Stationary fronts may
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is a non-moving (or stalled) boundary between two air masses, neither of which is strong enough to replace the other. They tend to remain essentially in the same area for extended periods of time, especially with parallel winds directions; They usually move in waves but not persistently. There is
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as well. Cold fronts can produce sharper and more intense changes in weather and move at a rate that is up to twice as fast as warm fronts, since cold air is more dense than warm air, lifting as well as pushing the warm air preceding the boundary. The lifting motion often creates a narrow line of
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A wide variety of weather can be found along a stationary front, but usually clouds and prolonged precipitation are found there. Stationary fronts either dissipate after several days or devolve into shear lines, but they can transform into a cold or warm front if the conditions aloft change.
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Different air masses which affect North America, as well as other continents, tend to be separated by frontal boundaries. In this illustration, the Arctic front separates Arctic from Polar air masses, while the Polar front separates Polar air from warm air masses.
988: 736:. On weather maps, the surface position of the cold front is marked by a blue line with triangles pointing in the direction where cold air travels and it is placed at the leading edge of the cooler air mass. Cold fronts often bring rain, and sometimes heavy 1732: 651:
which provides a top view of weather elements over a geographical area at a specified time based on information from ground-based weather stations. Weather maps are created by detecting, plotting and tracing the values of relevant quantities such as
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Organized areas of thunderstorm activity not only reinforce pre-existing frontal zones, but can outrun actively existing cold fronts in a pattern where the upper level jet splits apart into two streams, with the resultant
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classification is the most widely accepted form of air mass classification. Air mass classifications are indicated by three letters: Fronts separate air masses of different types or origins, and are located along
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is present as the lifted moist warm air condenses. The concept of colder, dense air "wedging" under the less dense warmer air is too simplistic, as the upward motion is really part of a maintenance process for
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Occluded fronts are indicated on a weather map by a purple line with alternating half-circles and triangles pointing in direction of travel. The trowal is indicated by a series of blue and red junction lines.
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These features are often depicted in the warm season across the United States on surface analyses and lie within surface troughs. If outflow boundaries or squall lines form over arid regions, a
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is possible, especially when an occlusion or triple point is formed with a cold front. A weaker form of the dry line seen more commonly is the lee trough, which displays weaker differences in
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has diminished between the air masses, for instance after flowing out over a uniformly warm ocean, the front can degenerate into a mere line which separates regions of differing
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A cold front is located along and on the bounds of the warm side of a tightly packed temperature gradient. On surface analysis charts, this temperature gradient is visible in
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Stationary fronts are marked on weather maps with alternating red half-circles and blue spikes pointing opposite to each other, indicating no significant movement.
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are a particularly favored location. The dry line normally moves eastward during the day and westward at night. A dry line is depicted on
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This also forces temperature differences across warm fronts to be broader in scale. Clouds appearing ahead of the warm front are mostly
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may result. Squall lines are depicted on NWS surface analyses as an alternating pattern of two red dots and a dash labelled SQLN or
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the surface location of a warm front is marked with a red line of semicircles pointing in the direction the air mass is travelling.
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the warm moist air is less dense than the cooler dry air and the boundary slope reverses. In the vicinity of the reversal aloft,
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features such as weather fronts. Surface weather analyses have special symbols which show frontal systems, cloud cover,
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depending on the type of occlusion the front is experiencing. Precipitations and clouds are associated with the
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There are two different meanings used within meteorology to describe weather around a frontal zone. The term "
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Approaching weather fronts are often visible from the ground, but are not always as well defined as this.
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on the other hand may represent low pressure, which frequently accompanies precipitation and
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Office of the Federal Coordinator for Meteorological Services and Supporting Research
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Air Apparent: How meteorologists learned to map, predict, and dramatize weather
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Air Apparent: How meteorologists learned to map, predict, and dramatize weather
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The third letter designates the stability of the atmosphere; it is labeled:
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Meteorology Today: An introduction to weather, climate, and the environment
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uperior air (dry air formed by significant upward lift in the atmosphere).
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The dry line may occur anywhere on earth in regions intermediate between
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may represent a high pressure area, implying fair or clear weather. An
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Cold fronts generally move from west to east, whereas warm fronts move
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A shelf cloud such as this one can be a sign that a squall is imminent
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increase on the north side of surface highs, areas of lowered
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Boundary separating two masses of air of different densities
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air is denser and harder to lift from the Earth's surface.
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Fronts are the principal cause of significant weather.
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areas and warm seas. The southern plains west of the
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bring light snow or rain for a long period of time.
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Occluded front depiction for the Northern Hemisphere
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Durham, NH: 868:characteristics, this air is susceptive to 728:and can sometimes also be identified using 351:. This is most common over the open ocean. 250: 236: 39: 1964:. Glossary – Weather World 2010 Project. 1948:. Glossary – Weather World 2010 Project. 1932:. Glossary – Weather World 2010 Project. 1699:. Glossary – Weather World 2010 Project. 1583:. Glossary – Weather World 2010 Project. 1469:. Glossary – Weather World 2010 Project. 1858:– via amsglossary.allenpress.com. 1828:– via amsglossary.allenpress.com. 1685:– via amsglossary.allenpress.com. 1628:– via amsglossary.allenpress.com. 1301:"Bergeron classification of air masses" 1288:– via amsglossary.allenpress.com. 1181: 198: 180: 133: 91: 1703:. Department of Atmospheric Sciences. 1587:. Department of Atmospheric Sciences. 1473:. Department of Atmospheric Sciences. 1385:Weather Underground (wunderground.com) 1192:Miller, Samuel T. (10 November 2000). 1911:Hydrometeorological Prediction Center 1299:Saravanan, K.J., ed. (27 June 2008). 1253:Hydrometeorological Prediction Center 415:characteristic of its source region: 355:Bergeron classification of air masses 7: 214:Glossary of tropical cyclone terms 25: 1529:World Meteorological Organisation 1412:. Psychology Press. p. 309. 1331:. Cengage Learning. p. 296. 516:older”) than the ground below it. 1994:Synoptic meteorology and weather 1898:Roth, David (21 November 2013). 1240:Roth, David (21 November 2013). 1162: 411:The second letter describes the 48: 1900:Unified Surface Analysis Manual 1844:American Meteorological Society 1814:American Meteorological Society 1796:American Meteorological Society 1771:American Meteorological Society 1697:"Dry line: A moisture boundary" 1671:American Meteorological Society 1614:American Meteorological Society 1242:Unified Surface Analysis Manual 1081:Fronts are generally guided by 526:armer than the ground below it. 396:ontinental air masses (dry) and 382:The first letter describes its 156:Climate variability and change 1: 1047:and the presence of a strong 622:6. squall / shear line 1872:Monmonier, Mark S. (1999). 1842:. Glossary of Meteorology. 1812:. Glossary of Meteorology. 1780:– via geographic.org. 1669:. Glossary of Meteorology. 1612:. Glossary of Meteorology. 1355:Monmonier, Mark S. (1999). 1198:University of New Hampshire 998:Mesoscale Convective System 522:  if the air mass is 508:  if the air mass is 406:aritime air masses (moist). 2015: 1531:/ Eumetcal. Archived from 1325:Ahrens, C. Donald (2007). 1194:"Clouds and precipitation" 1022: 980: 918: 883: 837: 796: 769: 717: 632: 358: 224:Glossary of climate change 1915:National Hurricane Center 1305:weatherfront.blogspot.com 1280:. Glossary of Meteorology 1257:National Hurricane Center 616:3. stationary front 266:is a boundary separating 219:Glossary of tornado terms 1989:Meteorological phenomena 1726:"Chapter 2: Definitions" 1559:SKYbrary Aviation Safety 1504:National Weather Service 1446:National Weather Service 1381:"Mixed surface analysis" 1278:"Airmass classification" 1144:Surface weather analysis 1069:Orographic precipitation 1040:Convective precipitation 1033:Convective precipitation 971:National Weather Service 635:Surface weather analysis 598:Surface weather analysis 309:are usually preceded by 1763:"[letter]  1641:"Dryline cross section" 1406:Park, Chris C. (2001). 1139:Norwegian cyclone model 1114:Atmospheric circulation 620:5. surface trough 618:4. occluded front 581:ontinental tropic; and 209:Glossary of meteorology 1970:University of Illinois 1954:University of Illinois 1938:University of Illinois 1705:University of Illinois 1589:University of Illinois 1475:University of Illinois 1387:. Current weather maps 1034: 1019:Precipitation produced 992: 870:convective instability 808: 630: 626:8. tropical wave 594: 37: 1129:Extratropical cyclone 1089:, which is caused by 1032: 990: 862:extratropical cyclone 806: 605: 535: 77:Atmospheric chemistry 35: 1840:"Orographic lifting" 1677:on 19 September 2011 1527:. English glossary. 1149:Trough (meteorology) 897:temperature gradient 864:. With its warm and 65:Atmospheric dynamics 42:Atmospheric sciences 1109:Atmosphere of Earth 614:2. warm front 612:1. cold front 607:Weather map symbols 290:can bring bands of 60:Atmospheric physics 44: 1850:on 14 October 2006 1761:Branick, Michael. 1647:on 20 January 2008 1581:"Stationary front" 1555:"Stationary Front" 1204:on 11 January 2005 1104:Anticyclonic storm 1035: 993: 848:is a near-surface 809: 654:sea-level pressure 643:High-pressure area 631: 595: 301:or be preceded by 38: 1419:978-0-415-21771-2 1338:978-0-495-01162-0 963:Mississippi River 895:normally a broad 639:Low-pressure area 624:7. dry line 402:  used for 392:  used for 386:properties, with 260: 259: 16:(Redirected from 2006: 1973: 1957: 1941: 1925: 1923: 1921: 1904: 1887: 1860: 1859: 1857: 1855: 1846:. Archived from 1836: 1830: 1829: 1827: 1825: 1816:. Archived from 1806: 1800: 1799: 1788: 1782: 1781: 1779: 1777: 1758: 1752: 1751: 1749: 1747: 1741: 1735:. Archived from 1730: 1722: 1716: 1715: 1713: 1711: 1693: 1687: 1686: 1684: 1682: 1673:. Archived from 1663: 1657: 1656: 1654: 1652: 1643:. Archived from 1636: 1630: 1629: 1627: 1625: 1620:on 14 March 2007 1616:. Archived from 1606: 1600: 1599: 1597: 1595: 1577: 1571: 1570: 1568: 1566: 1551: 1545: 1544: 1542: 1540: 1535:on 31 March 2014 1521: 1515: 1514: 1512: 1510: 1492: 1486: 1485: 1483: 1481: 1467:"Occluded front" 1463: 1457: 1456: 1454: 1452: 1430: 1424: 1423: 1403: 1397: 1396: 1394: 1392: 1377: 1371: 1370: 1352: 1343: 1342: 1322: 1316: 1315: 1313: 1311: 1296: 1290: 1289: 1287: 1285: 1274: 1268: 1267: 1265: 1263: 1246: 1237: 1214: 1213: 1211: 1209: 1200:. Archived from 1189: 1172: 1167: 1166: 1013:outflow boundary 892:stationary front 886:Stationary front 880:Stationary front 872:and can sustain 694: 666:geographical map 592: 588: 580: 572: 568: 560: 556: 548: 544: 525: 515: 511: 496: 484: 471: 458: 451: 438: 425: 405: 395: 341:density contrast 252: 245: 238: 119:Tropical cyclone 52: 45: 21: 2014: 2013: 2009: 2008: 2007: 2005: 2004: 2003: 1979: 1978: 1960: 1944: 1928: 1919: 1917: 1902: 1897: 1894: 1884: 1871: 1868: 1866:Further reading 1863: 1853: 1851: 1838: 1837: 1833: 1823: 1821: 1820:on 5 March 2007 1808: 1807: 1803: 1790: 1789: 1785: 1775: 1773: 1760: 1759: 1755: 1745: 1743: 1739: 1728: 1724: 1723: 1719: 1709: 1707: 1695: 1694: 1690: 1680: 1678: 1665: 1664: 1660: 1650: 1648: 1638: 1637: 1633: 1623: 1621: 1608: 1607: 1603: 1593: 1591: 1579: 1578: 1574: 1564: 1562: 1553: 1552: 1548: 1538: 1536: 1523: 1522: 1518: 1508: 1506: 1494: 1493: 1489: 1479: 1477: 1465: 1464: 1460: 1450: 1448: 1432: 1431: 1427: 1420: 1405: 1404: 1400: 1390: 1388: 1379: 1378: 1374: 1367: 1354: 1353: 1346: 1339: 1324: 1323: 1319: 1309: 1307: 1298: 1297: 1293: 1283: 1281: 1276: 1275: 1271: 1261: 1259: 1244: 1239: 1238: 1217: 1207: 1205: 1191: 1190: 1183: 1179: 1168: 1161: 1158: 1099: 1087:Coriolis effect 1079: 1027: 1021: 985: 979: 923: 917: 888: 882: 852:in between the 842: 836: 801: 795: 774: 768: 722: 716: 696: 692: 645: 633:Main articles: 629: 628:9. trough 627: 625: 623: 621: 619: 617: 615: 613: 610: 600: 590: 586: 578: 570: 566: 558: 554: 546: 542: 523: 513: 509: 494: 482: 469: 456: 449: 436: 423: 403: 393: 363: 357: 256: 28: 23: 22: 18:Baroclinic zone 15: 12: 11: 5: 2012: 2010: 2002: 2001: 1999:Weather fronts 1996: 1991: 1981: 1980: 1975: 1974: 1958: 1942: 1926: 1893: 1892:External links 1890: 1889: 1888: 1882: 1867: 1864: 1862: 1861: 1831: 1801: 1798:. 8 June 2016. 1783: 1753: 1717: 1688: 1658: 1639:Cai, Huaqing. 1631: 1601: 1572: 1561:. 20 July 2021 1546: 1516: 1498:. Norman, OK: 1496:"Triple Point" 1487: 1458: 1425: 1418: 1398: 1372: 1365: 1344: 1337: 1317: 1291: 1269: 1215: 1180: 1178: 1175: 1174: 1173: 1170:Weather portal 1157: 1156: 1151: 1146: 1141: 1136: 1131: 1126: 1121: 1116: 1111: 1106: 1100: 1098: 1095: 1078: 1075: 1023:Main article: 1020: 1017: 981:Main article: 978: 975: 944:severe weather 919:Main article: 916: 913: 884:Main article: 881: 878: 838:Main article: 835: 832: 813:occluded front 799:Occluded front 797:Main article: 794: 793:Occluded front 791: 770:Main article: 767: 764: 718:Main article: 715: 712: 695: 690: 670:synoptic scale 611: 599: 596: 530: 529: 528: 527: 517: 500: 499: 498: 488: 475: 462: 442: 429: 409: 408: 407: 397: 359:Main article: 356: 353: 326:severe weather 258: 257: 255: 254: 247: 240: 232: 229: 228: 227: 226: 221: 216: 211: 203: 202: 196: 195: 194: 193: 185: 184: 178: 177: 176: 175: 174: 173: 168: 161:Climate change 158: 153: 152: 151: 138: 137: 131: 130: 129: 128: 127: 126: 116: 115: 114: 109: 96: 95: 89: 88: 87: 86: 85: 84: 74: 73: 72: 62: 54: 53: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 2011: 2000: 1997: 1995: 1992: 1990: 1987: 1986: 1984: 1977: 1971: 1967: 1963: 1959: 1955: 1951: 1947: 1946:"Warm fronts" 1943: 1939: 1935: 1931: 1930:"Cold fronts" 1927: 1916: 1912: 1908: 1901: 1896: 1895: 1891: 1885: 1883:0-226-53422-7 1879: 1875: 1870: 1869: 1865: 1849: 1845: 1841: 1835: 1832: 1819: 1815: 1811: 1805: 1802: 1797: 1793: 1787: 1784: 1772: 1768: 1766: 1757: 1754: 1742:on 6 May 2009 1738: 1734: 1727: 1721: 1718: 1706: 1702: 1698: 1692: 1689: 1676: 1672: 1668: 1662: 1659: 1646: 1642: 1635: 1632: 1619: 1615: 1611: 1605: 1602: 1590: 1586: 1582: 1576: 1573: 1560: 1556: 1550: 1547: 1534: 1530: 1526: 1520: 1517: 1505: 1501: 1497: 1491: 1488: 1476: 1472: 1468: 1462: 1459: 1447: 1443: 1439: 1435: 1434:"Overrunning" 1429: 1426: 1421: 1415: 1411: 1410: 1402: 1399: 1386: 1382: 1376: 1373: 1368: 1366:0-226-53422-7 1362: 1358: 1351: 1349: 1345: 1340: 1334: 1330: 1329: 1321: 1318: 1306: 1302: 1295: 1292: 1279: 1273: 1270: 1258: 1254: 1250: 1243: 1236: 1234: 1232: 1230: 1228: 1226: 1224: 1222: 1220: 1216: 1203: 1199: 1195: 1188: 1186: 1182: 1176: 1171: 1165: 1160: 1155: 1152: 1150: 1147: 1145: 1142: 1140: 1137: 1135: 1132: 1130: 1127: 1125: 1122: 1120: 1117: 1115: 1112: 1110: 1107: 1105: 1102: 1101: 1096: 1094: 1092: 1088: 1084: 1076: 1074: 1071: 1070: 1065: 1060: 1058: 1054: 1050: 1046: 1042: 1041: 1031: 1026: 1025:Precipitation 1018: 1016: 1014: 1010: 1006: 1001: 999: 989: 984: 976: 974: 972: 968: 967:United States 964: 960: 955: 953: 952:thunderstorms 949: 945: 940: 936: 932: 928: 922: 914: 912: 908: 904: 902: 898: 893: 887: 879: 877: 875: 874:thunderstorms 871: 867: 863: 859: 855: 851: 847: 841: 833: 831: 827: 825: 824: 817: 814: 805: 800: 792: 790: 787: 783: 778: 773: 765: 763: 761: 760:frontogenesis 757: 752: 748: 747:thunderstorms 744: 739: 738:thunderstorms 735: 731: 727: 721: 713: 711: 709: 705: 704:precipitation 701: 691: 689: 687: 683: 679: 675: 674:precipitation 671: 668:to help find 667: 663: 659: 655: 650: 644: 640: 636: 608: 604: 597: 584: 576: 564: 552: 540: 534: 521: 518: 507: 504: 503: 501: 492: 489: 486: 479: 476: 473: 466: 463: 460: 453: 446: 443: 440: 433: 430: 427: 420: 417: 416: 414: 410: 401: 398: 391: 388: 387: 385: 381: 380: 379: 377: 373: 368: 362: 354: 352: 350: 346: 345:wind velocity 342: 338: 333: 331: 327: 323: 319: 315: 314:precipitation 312: 308: 304: 300: 299:precipitation 297: 293: 292:thunderstorms 289: 285: 281: 277: 273: 269: 265: 264:weather front 253: 248: 246: 241: 239: 234: 233: 231: 230: 225: 222: 220: 217: 215: 212: 210: 207: 206: 205: 204: 201: 197: 192: 189: 188: 187: 186: 183: 179: 172: 169: 167: 164: 163: 162: 159: 157: 154: 150: 147: 146: 145: 142: 141: 140: 139: 136: 132: 125: 122: 121: 120: 117: 113: 110: 108: 105: 104: 103: 100: 99: 98: 97: 94: 90: 83: 80: 79: 78: 75: 71: 68: 67: 66: 63: 61: 58: 57: 56: 55: 51: 47: 46: 43: 34: 30: 19: 1976: 1966:Online guide 1965: 1950:Online guide 1949: 1934:Online guide 1933: 1918:. Retrieved 1873: 1852:. Retrieved 1848:the original 1834: 1822:. Retrieved 1818:the original 1810:"Convection" 1804: 1794:. Glossary. 1786: 1774:. Retrieved 1764: 1756: 1744:. Retrieved 1737:the original 1720: 1708:. Retrieved 1701:Online guide 1700: 1691: 1679:. Retrieved 1675:the original 1667:"Lee trough" 1661: 1649:. Retrieved 1645:the original 1634: 1622:. Retrieved 1618:the original 1610:"Shear line" 1604: 1592:. Retrieved 1585:Online guide 1584: 1575: 1563:. Retrieved 1558: 1549: 1537:. Retrieved 1533:the original 1519: 1507:. Retrieved 1490: 1478:. Retrieved 1471:Online guide 1470: 1461: 1449:. Retrieved 1440:. Glossary. 1437: 1428: 1408: 1401: 1389:. Retrieved 1384: 1375: 1356: 1327: 1320: 1308:. Retrieved 1304: 1294: 1282:. Retrieved 1272: 1260:. Retrieved 1206:. Retrieved 1202:the original 1124:Cyclogenesis 1080: 1067: 1062:In the warm 1061: 1038: 1036: 1012: 1008: 1002: 994: 956: 924: 909: 905: 889: 843: 828: 821: 818: 810: 779: 775: 723: 697: 681: 677: 646: 606: 582: 574: 562: 550: 538: 519: 505: 493:  for 490: 480:  for 477: 467:  for 464: 447:  for 444: 434:  for 431: 421:  for 418: 399: 389: 364: 334: 324:can trigger 303:squall lines 296:cumulonimbus 263: 261: 199: 29: 1134:Hadley cell 1083:winds aloft 1059:may occur. 1053:roll clouds 983:Squall line 977:Squall line 846:warm sector 840:Warm sector 834:Warm sector 756:geostrophic 662:cloud cover 658:temperature 649:weather map 557:ontinental 545:ontinental 347:known as a 307:warm fronts 288:cold fronts 280:temperature 272:air density 135:Climatology 93:Meteorology 1983:Categories 1920:22 October 1854:22 October 1824:22 October 1776:22 October 1746:22 October 1710:22 October 1681:22 October 1651:5 December 1624:22 October 1594:22 October 1509:22 October 1480:22 October 1262:22 October 1177:References 1154:Warm front 1119:Cold front 1049:jet stream 1045:wind shear 1009:squal line 935:westerlies 858:cold front 854:warm front 782:stratiform 772:Warm front 766:Warm front 749:if enough 720:Cold front 714:Cold front 349:shear line 330:wind shift 311:stratiform 268:air masses 200:Glossaries 1539:28 August 1057:tornadoes 903:packing. 726:isotherms 708:katafront 485:quatorial 374:of lower 322:dry lines 1792:"Haboob" 1565:19 April 1525:"Trowal" 1391:19 April 1310:19 April 1097:See also 1077:Movement 948:moisture 939:pressure 931:moisture 927:dry line 921:Dry line 915:Dry line 901:isotherm 856:and the 850:air mass 751:humidity 700:anafront 589:aritime 569:aritime 512:older (“ 459:ntarctic 384:moisture 376:pressure 367:Bergeron 361:Air mass 337:poleward 305:, while 284:humidity 191:Aeronomy 182:Aeronomy 166:category 149:category 124:category 107:category 82:category 70:category 965:in the 743:showers 730:isobars 664:onto a 593:ropic.) 549:rctic; 426:ropical 413:thermal 372:troughs 144:Climate 102:Weather 1880:  1416:  1363:  1335:  1284:22 May 1208:8 July 1064:season 1055:" and 1005:haboob 959:desert 823:trowal 734:trough 706:. A " 686:storms 660:, and 641:, and 573:olar; 561:olar; 472:onsoon 282:, and 171:portal 112:portal 1903:(PDF) 1740:(PDF) 1729:(PDF) 1451:2 May 1245:(PDF) 1091:Earth 866:humid 693:Types 487:, and 452:rctic 1922:2006 1907:NOAA 1878:ISBN 1856:2006 1826:2006 1778:2006 1748:2006 1712:2006 1683:2006 1653:2006 1626:2006 1596:2006 1567:2022 1541:2013 1511:2006 1500:NOAA 1482:2006 1453:2010 1442:NOAA 1414:ISBN 1393:2022 1361:ISBN 1333:ISBN 1312:2022 1286:2008 1264:2006 1249:NOAA 1210:2011 844:The 745:and 439:olar 365:The 316:and 294:and 276:wind 1765:'O' 1438:'O' 1436:. 1051:, " 811:An 786:Fog 585:is 577:is 565:is 553:is 541:is 454:or 318:fog 1985:: 1913:/ 1909:/ 1731:. 1557:. 1502:/ 1444:/ 1383:. 1347:^ 1303:. 1255:/ 1251:/ 1218:^ 1184:^ 1015:. 954:. 890:A 762:. 656:, 637:, 583:mT 575:cT 563:mP 551:cP 539:cA 378:. 332:. 278:, 274:, 262:A 1972:. 1956:. 1940:. 1924:. 1886:. 1767:" 1750:. 1714:. 1655:. 1598:. 1569:. 1543:. 1513:. 1484:. 1455:. 1422:. 1395:. 1369:. 1341:. 1314:. 1266:. 1212:. 682:L 678:H 609:: 591:t 587:m 579:c 571:p 567:m 559:p 555:c 547:a 543:c 537:( 524:w 520:w 514:k 510:c 506:k 495:s 491:S 483:e 478:E 474:, 470:m 465:M 461:, 457:A 450:A 445:A 441:, 437:p 432:P 428:, 424:t 419:T 404:m 400:m 394:c 390:c 251:e 244:t 237:v 20:)

Index

Baroclinic zone

Atmospheric sciences

Atmospheric physics
Atmospheric dynamics
category
Atmospheric chemistry
category
Meteorology
Weather
category
portal
Tropical cyclone
category
Climatology
Climate
category
Climate variability and change
Climate change
category
portal
Aeronomy
Aeronomy
Glossary of meteorology
Glossary of tropical cyclone terms
Glossary of tornado terms
Glossary of climate change
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t

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