it means sun showers

One of many acronyms that describe weather conditions, including:

    BLZRD - blizzard
    BTFLDY - beautiful day
    CLD - cold
    SHT - so hot
    FRZN - freezing
    SNNY - sunny
    HRCN - hurricane
    RNY - rainy
    WRM - warm
    TRNDO - tornado
    WNDY - windy

Online jargon, also known as text message shorthand, used in texting, online chat, instant messaging, email, blogs, and newsgroup postings, these types of abbreviations are also referred to as chat acronyms.  

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NetLingo Classification: Acronyms and Text Message

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