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December 16-17, 2020 Winter Storm Obs/Nowcasting


WxUSAF
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4 minutes ago, Imgoinhungry said:

Long time lurker and dont post much... i apologize in advance for the dumb question.  What is 00z, 19 z, etc.  So a map that shows "valid at 19z" means... 7pm like military time?

https://www.nco.ncep.noaa.gov/pmb/prod_overview/local_gmt_conversion.shtml

I always need to look at this to figure out what time the maps are referring to.

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1 minute ago, Imgoinhungry said:

thank you!

If you haven't gotten a more complete answer, its "military" time aka 24 hr time, and the z is for Zulu, aka Greenwich Mean Time. 

In EDT you either subtract 4 or 16 depending on morning or afternoon (just do whichever doesn't make it negative), and in EST subtract 5 or 17. 

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