NAM (Eta) 12 km Forecast Data Archive 
			  Revised: 10 January 2004 

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Overview -


NOAA ARL has started a 31-day rotational archive of the first 3 hours of NAM 12km
meteorological data from NOAA NCEP.  An extraction procedure was implemented to
concatenate the initial field (+0 h forecast) and the +3 h forecast for each 
cycle, four times daily, into daily files that can be accessed as a
pseudo analysis archive.  Only the last 31 days are saved.  At the end of each
month the daily files begin to be overwritten with the new month's data.
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Additional Data Set Details

	12 km lambert conformal grid 
	614x428 points 
	Spatial domain: 12.19N 133.46W to 57.329N 49.4167W
	31-day rotating archive with output every 3 hours 
	26 Levels (hPa): 1000,975,950,925,900,875,850,825,800,775,750,725,700,
                      650,600,550,500,450,400,350,300,250,200,150,100,50 
	Sfc Variables:         14 SHGT MSLP TPPT CPPT T02M RH2M U10M 
                                  V10M PRSS LHTF SHTF USTR RGHS DSWF 
	Upper Levels:           7 HGTS TEMP UWND VWND WWND RELH TKEN

	MODEL TYPE:         NAM
	VERT COORD:         2
	POLE LAT:           90.000
	POLE LON:           0.0000
	REF LAT:            25.000
	REF LON:            -95.00
	REF GRID:           12.190
	ORIENTATION:        0.
	CONE ANGLE:         25.0
	SYNC X:             1.
	SYNC Y:             1.
	SYNC LAT:           12.190
	SYNC LON:           -133.46
	NUMB X:             614
	NUMB Y:             428
	NUMB LEVELS:        26