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1、ForecastingTermsThefollowingdefinitionsofsomecommonforecastingtermswillhelpyouextractthemaximuminformationfromforecasts.Fine:Norainorotherprecipitation(hail,snow,etc).Theuseoffineisgenerallyavoidedinexcessivelycloudy,windy,foggyordustyconditions.Inparticular,notethatfi
2、nemeanstheabsenceofrainorotherprecipitationsuchashailorsnow--not'good'or'pleasant'weather.Dry:Freefromrain.Normallyusedwhenprecedingweatherhasalsobeenrelativelydry,anddryweatherisexpectedt°Continueforatleastadayorso.CloudCoverClear:Freefromcloud,fog,mistordusthaze.Sunn
3、y:Littlechanceofthesunbeingobscuredbycloud.(Note:Highlevelcirruscloudsareoftenthinandwispy,allowingaconsiderableamountofsunlighttopenetratethem,sufficienttoproduceshadows.Inthiscasethedaycouldbetermed'sunny'eventhoughmorethanhalftheskymaybecoveredincirruscloud.)Cloudy:
4、Predominantlymorecloudthanclearsky.Forexample,duringthedaythesunwouldbeobscuredbycloudforsubstantialperiodsoftime.Overcast:Skycompletelycoveredwithcloud.Forecastsofcloudcovernormallygiveanaverage,ifnosignificantvariationsareexpected.Aclearday,forexample,mayatsometimess
5、eeafewcloudpatches.Forecastersexpectingsignificantvariationsincloudamountmayusesuchtermsassunnyperiods,sunnybreaks,cloudyperiods,cloudyattimes,mostly/mainlysunny,mostly/mainlycloudy.Ifexpectingamajorchangeincloudcover,theyusuallyindicateadistincttrend,e.g.becomingsunny
6、orcloudincreasing.TemperatureDescriptorsMaximumTemperature(Highestdaytimetemperature)-Summer/WinterSummer DescriptivetermInlandplainsCoastandrangessouthoftropicsCoastaltropicsVeryhot:morethan40°Cmorethan37°C-Hot:35-39°C32-37°C35-39°CWarm:30-34°C27-31°CNotusedMild
7、:25-29°C22-26°C-Cool:20-24°C16-21°C-Cold:lessthan20°Clessthan16°C- Winter DescriptivetermSouthof33°SplusrangesNorthof33°SexceptrangesandtropicsTropicsWarm:morethan20°Cmorethan25°C-Mild:16-20°C20-24°C-Cool:13-15°C15-19°C20-25°CCold:10-12°C10-14°Clessthan20°CVer
8、ycold:lessthan10°Clessthan10°C- MinimumTemperature(Lowestovernighttemperature)-Summer/WinterSummer Descripti
