reppinfreedom Posted September 20, 2013 Share Posted September 20, 2013 I can't figure it out... This map says "12-hour forecast valid 18 UTC Friday"... It is a "3-hour accum precip" map... So does that mean the map is for 15-18UTC, or for 18-21UTC? http://weather.rap.ucar.edu/model/displayMod.php?var=ruc_sfc_prcp&hours=hr03hr06hr09hr12hr15hr18 Link to comment Share on other sites More sharing options...
Thunder Road Posted September 20, 2013 Share Posted September 20, 2013 15-18 Link to comment Share on other sites More sharing options...
reppinfreedom Posted September 20, 2013 Author Share Posted September 20, 2013 That is odd... I would have thought it would be 18-21... Because it's a "forecast". Thanks! Link to comment Share on other sites More sharing options...
wxmx Posted September 20, 2013 Share Posted September 20, 2013 That is odd... I would have thought it would be 18-21... Because it's a "forecast". Thanks! 15-18 is a forecast...it hasn't happened yet. Link to comment Share on other sites More sharing options...
reppinfreedom Posted September 20, 2013 Author Share Posted September 20, 2013 Well, the rain started here on the Oregon coast at 16UTC... Seems correct! Link to comment Share on other sites More sharing options...
WidreMann Posted September 24, 2013 Share Posted September 24, 2013 It's the "as of" amount. So as of 18z, x amount of precip has accumulated. For precip to accumulate, it has to have fallen. It can't be about to fall (unless you live in reverse time world). Link to comment Share on other sites More sharing options...
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