{"id":97,"date":"2023-05-18T21:38:13","date_gmt":"2023-05-18T09:38:13","guid":{"rendered":"https:\/\/communityweather.org.nz\/?page_id=97"},"modified":"2023-05-18T22:26:19","modified_gmt":"2023-05-18T10:26:19","slug":"weather-glossary-b","status":"publish","type":"page","link":"https:\/\/communityweather.org.nz\/?page_id=97","title":{"rendered":"Weather Glossary \u2013 B"},"content":{"rendered":"\t\t
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B<\/span><\/strong><\/p>

BACKING WINDS<\/strong>\u00a0– A counterclockwise change in wind direction. Backing winds with height are indicative of cold air advection (CAA).<\/span><\/p>

BAROCLINICITY<\/strong>– A cold air advection\/warm air advection couplet that increases atmospheric instability. On analysis and forecast charts it is the isotherms crossing the height contours.<\/span><\/p>

BAROTROPIC<\/strong>– Homogeneous atmosphere in which there are neither fronts nor any thermal advections.<\/span><\/p>

BAROMETER<\/strong>\u00a0An instrument for measuring atmospheric pressure.<\/span><\/p>

BEAUFORT\u00a0<\/b>SCALE<\/strong>\u00a0– a scale that indicates the wind speed using the effect wind has on certain familiar objects.<\/span><\/p>

BLACKBODY<\/strong>– A mass which absorbs and emits all wavelengths of radiation<\/span><\/p>

BLACK\u00a0<\/b>ICE<\/strong>\u00a0– thin, new ice that forms on fresh water or dew covered surfaces; it is common on roadways during the fall and early winter and appears “black” because of its transparency.<\/span><\/p>

BLIZZARD<\/strong>\u00a0– A storm lasting about 3 hours or longer with sustained winds 35 mph or greater with frequent gusts to 35 mph or greater; and considerable falling and\/or blowing snow frequently reducing visibilities to less than 1\/4 mile.<\/span><\/p>

BLOCKING\u00a0<\/b>PATTERN<\/strong>– A situation in which the upper tropospheric flow becomes highly meridional and stagnant. Two common blocking patterns are the omaga block and the rex block.<\/span><\/p>

BLOWING DUST OR SAND<\/strong>\u00a0– Small particles of dust or sand which are caused by strong winds blowing over dry ground, that has little or no vegetation.<\/span><\/p>

BLOWING SNOW\u00a0<\/strong>– Wind-driven snow which reduces surface visibility.<\/span><\/p>

BOW ECHO –<\/strong>\u00a0An accelerated portion of a squall line of thunderstorms, taking on a radar indicated bow configuration, created by strong downburst winds<\/span><\/p>

BREEZY<\/strong>\u00a0– Sustained winds of 15 to 25 mph.<\/span><\/p>

BROKEN\u00a0<\/b>CLOUDS<\/strong>\u00a0– Clouds which cover between 6\/10 and 9\/10 of the sky.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

B BACKING WINDS\u00a0– A counterclockwise change in wind direction. Backing winds with height are indicative of cold air advection (CAA). BAROCLINICITY– A cold air advection\/warm air...<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":48,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-97","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/communityweather.org.nz\/index.php?rest_route=\/wp\/v2\/pages\/97","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/communityweather.org.nz\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/communityweather.org.nz\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/communityweather.org.nz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/communityweather.org.nz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=97"}],"version-history":[{"count":4,"href":"https:\/\/communityweather.org.nz\/index.php?rest_route=\/wp\/v2\/pages\/97\/revisions"}],"predecessor-version":[{"id":209,"href":"https:\/\/communityweather.org.nz\/index.php?rest_route=\/wp\/v2\/pages\/97\/revisions\/209"}],"up":[{"embeddable":true,"href":"https:\/\/communityweather.org.nz\/index.php?rest_route=\/wp\/v2\/pages\/48"}],"wp:attachment":[{"href":"https:\/\/communityweather.org.nz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=97"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}