station model station model symbolic illustration showing weather occurring given reporting station created station model fit number weather elements small space weather maps allows map users analyze patterns air pressure temperature wind cloud cover precipitation station model plots use internationally accepted convention changed little august elements plot key weather elements including temperature point wind cloud cover air pressure pressure tendency precipitation measurement location units weather maps primarily use station model surface weather conditions model weather aloft reported weather balloon pilot report station model plots use mixture metric imperial units depending map location shown surface maps united_states primarily use imperial units inches degrees knots world uses metric measurements wind speed shown knots plotted winds station model uses wind wind direction speed wind shows speed flags end half flag depicts knots flag depicts knots pennant filled triangle depicts knots winds depicted blowing direction flags facing northeast wind depicted line extending cloud circle northeast flags indicating wind speed northeast end line plotted map analysis lines equal wind speeds accomplished particularly useful location jet stream upper level constant pressure charts usually hpa level flags point low pressure possible determine hemisphere station standing figure right located wind counter clock wise low pressure area wind blowing opposite direction law century ago winds initially plotted arrows facing feathers sides staff indicate wind speed united_states change modern convention flags shown staff indicate wind speed took effect august cloud cover wind direction cloud cover oldest atmospheric conditions coded station model circle middle station model represents cloud cover united_kingdom observation taken automated weather observation site shape triangle shape completely filled overcast conditions completely clear circle triangle conditions partly cloudy circle triangle partially filled cloud cover shape different looks depending sky covered cloud sky half clouds circle half white half black shape indicating sky cover station model indicate coverage low clouds ceiling height hundreds feet ceiling height height half sky covered clouds pilots knowledge sky cover helps determine visual flight rules met knowing degree cloud cover help determine weather fronts cold fronts warm fronts passed location areas cloudy lines performed indicate system cloud precipitation pattern technique rarely performed prevalence satellite imagery worldwide cloud types circle manned stations automatic stations report cloud types indicates sky cover lie symbols indicating cloud types low middle high clouds predominant cloud type depicted known middle high types depicted sky cover circle station model main low cloud type indicated circle station model limited room makes special provision vertical multi level clouds occupy particular time consequently cloud genera significant vertical development coded plotted low middle depending altitude normally form usually form low achieve vertical extent growing upward middle high conversely usually forms middle vertically developed growing downward low code separate formal group classification vertical multi level clouds observer procedure selecting numerical codes designed high reporting priority genera species significant vertical development symbols clouds emulate cloud shape indicated couple hooks indicated mound shape indicated upside symbol indicate cloud type present level cloud type highest priority included knowing cloud type locations help determine weather passed particular location low deck indicate station north warm thunderstorms indicate approach line cold present weather visibility left cloud shape center station model symbol depicting present weather present weather symbol depicts current weather normally visibility time observation visibility shown number statute miles united_states meters describing far observer time number located left present weather symbol pilots knowledge horizontal visibility helps determine flying instrument meteorological conditions conditions areas intense precipitation present weather depicted station model include dust fog ocean spray ash temperature point left center station model temperature point plotted united_states surface weather maps plotted degrees units degrees knowledge important data plotted map lines equal point easily analyzed man machine help determine location weather fronts sea level pressure height pressure surface right corner model surface weather map pressure showing pressure instance pressure certain location hpa pressure portion station model read digit pressure left nearby stations away pressure starts time choosing lead value nearest works best plotting value station model allows analysis weather maps maps plot data constant pressure surfaces pressure replaced height pressure surface pressure tendency pressure lie pressure tendency figure indicates pressure change past hours number depicting pressure change usually indicate pressure change different figures represent pressure change slant angled right indicates steady rise downward slant lower right indicates steady fall steady rises indicate improving conditions approaching high pressure normally occur wake cold steady falls indicate deteriorating conditions approaching low pressure area largest falls occurring advance surface cyclone attendant warm time day considered natural rises day locally natural falls day locally daily changes pressure mask movement pressure systems fronts past location lowest natural dip pressure weather pattern occurs highest natural peak pressure occurs plotted map analysis lines equal pressure change plotted map indicate direction motion high low pressures systems map domain past weather station models past weather plotted located pressure tendency indicate type weather experienced past hours weather types limited visibility precipitation
Station model