Air Quality & Pollen forecast for Cupertino - meteoblue

CAQI colour-coding is used in all air pollution forecast panels of the meteogram to indicate the level of pollution. For the pollen forecast there are no ... 7-DayWeather14-DayWeatherWeatherTodayWebcamsWeatherMapsWeatherMaps(legacy)ForecastMeteogramsMultiModelMultiModelEnsembleSeasonalForecastOutdoor&Sportswhere2goSnowSea&SurfAstronomySeeingAirQuality&PollenAviationAIRThermalsTrajectoriesCross-sectionStueve&SoundingMETAR&TAFAgricultureMeteogramAGROSowingWindowsSprayingWindowsSoilTrafficabilityHistory&ClimateClimateChangeClimate(modelled)Climate(observed)Short-termVerificationWeatherArchiveClimateComparisonhistory+ProductOverviewDataDownloadERA5DownloadYearComparisonHistogramWindRoseRiskAssessmentWeatherAPI+ProductOverviewForecastAPIProductsAd-freepoint+history+CityClimate AndroidApp iPhoneApp ProductsWidgetWidgetMapWidget3hWidgetDayWidgetSeeingmeteoTVNewsNewsWeatherNews Collapse Thissitealsousescookies meteobluedependsoncookiesforbestonlineexperience,toanalysesiteusageandpersonaliseadvertisingandcontent,forwhichweneedyourconsent. Tolearnmore:Privacy&Terms.Pleaseletusknowifyouagree. Settings meteoblueAd-free Usemeteoblueweatherforecastswithoutadvertisingandtracking. Ad-free9€ Premium50€ Alreadypurchased?Loginhere. × Locationsearch Language عربي Български Čeština Deutsch Ελληνικά English Español Français Magyar Italiano ქართულიენა Nederlands Polski Português Română Pусский Slovenský Srpski Türkçe Temperature °C °F Windspeed bft km/h m/s mph kn Precipitation mm in CupertinoOutdoor&SportsAirQuality&Pollen OurSoundingsanduniqueStuevediagramsforCentralEuropearenowbasedonICON-D2,thehighestresolutionnumericalmodelavailablefortheregion. Readon ThetoppanelshowstheforecastfortheCommonAirQualityIndex(CAQI)usedinEuropesince2006.Itisanumberonascalefrom1to100,wherealowvalue(greencolors)meansgoodairqualityandahighvalue(redcolors)meansbadairquality.CAQIcolour-codingisusedinallairpollutionforecastpanelsofthemeteogramtoindicatethelevelofpollution.Forthepollenforecasttherearenoofficialguidelinesforcolor-coding,aspollenarenotpartoftheAirQualityIndexforecast.TheAirQualityindexisdefinedseparatelynearroads(“roadside”index)orawayfromroads("background"index).meteoblueusesthebackgroundindex,becauseweathermodelscannotreproducesmall-scaledifferencesalongtheroads.Therefore,measurementsalongroadswillshowhighervaluesthanforecasthere. Thesecondpanelshowstheforecastofparticles(PManddesertdust)forCupertino.Atmosphericparticulatematter(PM)aremicroscopicsolidorliquidmattersuspendedintheair.Sourcesofparticulatemattercanbenaturaloranthropogenic.Ofgreatestconcernto publichealtharetheparticlessmallenoughtobeinhaledintothedeepestpartsofthelung.Theseparticlesarelessthan 10 micronsindiameter(approximately1/7ththethicknessoftheahumanhair)andaredefinedasPM10.Theyareamixtureofmaterialsthatcanincludesmoke,soot,dust,salt,acids,andmetals.Particulatematteralsoformswhen gasesemittedfrommotorvehiclesandindustryundergochemicalreactionsintheatmosphere.PM10isvisiblebyeyeasthehazethatwethinkofassmog.PM10areamongthemostharmfulofallairpollutants. PM10canincreasethe numberandseverityofasthmaattacksPM10causesoraggravatebronchitisandotherlungdiseasesPM10reducesthebody'sabilitytofightinfections PM10includesfine particulatematterdefinedasPM2.5,whicharefineparticleswithadiameterof2.5 μmorless.Thebiggestimpactofparticulateairpollutiononpublichealthisunderstoodtobefromlong-termexposuretoPM2.5:PM2.5increasestheage-specificmortalityrisk,particularlyfromcardiovascularcauses.DesertDustconsistsofparticlessmallerthan62μmoriginatingindeserts.Often,thedustparticlesaresmall,leadingtohighconcentrationsofPM10andPM2.5andallrelatedhealthimpacts. Forecastsofconcentrationsofairpollutiongasesarepresentedinthethirdpanel.Ozone(O₃)pollutioninthelowertroposphereiscausedmainlyinurbanareas.Ozonecan:MakeitmoredifficulttobreathedeeplyandvigorouslyCauseshortnessofbreath,andpainwhentakingadeepbreathCausecoughingandsoreorscratchythroatInflameanddamagethebreathingairwaysAggravatelungdiseasessuchasasthma,emphysema,andchronicbronchitisIncreasethefrequencyofasthmaattacksMakethelungsmoresusceptibletoinfectionContinuetodamagethelungsevenwhenthesymptomshavedisappearedCausechronicobstructivepulmonarydisease(COPD)Sulfurdioxide(SO₂)isagas,whichisinvisibleandhasanasty,sharpsmell.Itreactseasilywithothersubstancestoformharmfulcompounds,suchassulfuricacid,sulfurousacidandsulfateparticles.Short-termexposurestoSO₂canharmthehumanrespiratorysystemandmakebreathingdifficult.SO₂andothersulfuroxidescancontributetoacidrain,whichcanharmsensitiveecosystems.Children,theelderly,andthosewhosufferfromasthmaareparticularlysensitivetoeffectsofSO₂.Nitrogendioxide(NO₂)isareddish-browngasthathasacharacteristicsharp,bitingodorandisaprominentairpollutant. Themajorsourceofnitrogendioxideistheburningoffossilfuels:coal,oilandgas.Mostofthenitrogendioxideincitiescomesfrommotorvehicleexhaust.Nitrogendioxideisanimportantairpollutantbecauseitcontributestotheformationofozone,whichcanhavesignificantimpactsonhumanhealth. NO₂inflamestheliningofthelungs,anditcanreduceimmunitytolunginfections NO₂causesproblemssuchaswheezing,coughing,colds,fluandbronchitis ForEurope,theairpollutionmeteogramhasafourthpanel,showingthepollenforecastforCupertino. Birchpollenisoneofthemostcommonairborneallergensduringspringtime,orlaterintheyearinhigherlatitudes.Asthetreesbloom,theyreleasetinygrainsofpollenthatarescatteredbythewind.Asinglebirchtreecanproduceuptofivemillionpollengrains.Pollenisdispersedbyaircurrentsandcanbetransportedoverlargedistances.Wethusshowthepollenforecastoverlayedwiththe10mwindspeed. Grasspollenaretheprimarytriggerofpollenallergiesduringthesummermonths.Theycausesomeofthemostsevereanddifficult-to-treatsymptoms.Inhumidclimates,thegrasspollenseasonlastsseveralmonths.Indrierclimatesthegrasspollenseasonissignificantlyshorter,asarethebirchandolivepollenseason. Precipitationcancleantheairfrompollen,butifitisassociatedwiththunderstorms,thestrongwindsinitiallyincreasethepollenconcentration. Disclaimer NeithertheEuropeanCommissionnorECMWFnormeteoblueisresponsibleforanyusethatmaybemadeoftheforecastinformationpresentedhere.Predictionsareissuedfromanatmosphericmodelwith12kmresolution.Outputsmaynotbecorrelatedenoughwithrealconcentrations.Pleaseconsultyourlocalairqualityagency,especiallyinthecaseofapollutionpeakorapollutionalert. Showhelp Download Moreweatherdata WeatherMaps WindMap SeasonalForecast AIR Followus Printthispage Backtotop