NCEP North American Regional Reanalysis: NARR

Please re-download 2022 files for these variables if you downloaded them betweeen Mar 2 and Apr 7 2020. There was an issue with some of the time steps for Feb 2022: acpcp air.sfc albedo apcp bgrun cape ccond cfrzr cicep cin cnwat crain csnow dlwrf dswrf evap gflux hpbl lftx4 lhtfl pevap pottmp.sfc prate pres.sfc rcq rcs rcsol rct shtfl snod snohf snom snowc ssrun ulwrf.sfc uswrf.sfc veg vis weasd. This includes 8x daily and daily. In addition, download the monthly data (or just monthly for Feb 2022). Go To: Temporal Coverage | Spatial Coverage | Levels | Update Schedule | Download/Plot Data | Restrictions | Details | Caveats | File Naming | Citation | References | Original Source | Contact

Main Page | Pressure | Monolevel| Subsurface

See the PSL NARR webpage for more information on PSL's involvement in the NARR project

Brief Description:

• Very High Resolution Reanalysis of the North American region including assimilated precipitation.

Temporal Coverage: 8-times, Daily and Monthly means for 1979/01/01 to Apr 30, 2022 . Long Term Daily, Monthly means for years 1979 - 2000. Spatial Coverage: The native model grid is converted to a Northern Lambert Conformal Conic grid which is what we archive. Corners of this grid are 12.2N; 133.5W, 54.5N; 152.9W, 57.3N; 49.4W, 14.3N; 65.1W (essentially, North America). The grid resolution is 349x277 which is approximately 0.3 degrees (32km) resolution at the lowest latitude. A page describing the coverage along with information on reading the projection is available.

Levels:

• Surface and other
  

Update Schedule:

• Irregular.

Download/Plot Data: (FTP Access) Monolevel Data

See end of table for description of when times valid

Variable	Statistic	Level	Download File	Create Plot/Subset
Accumulated convective precipitation	3-hourly Accumulation	Surface	acpcp.yyyy.nc	N/A
Accumulated convective precipitation	Daily Accumulation	Surface	acpcp.yyyy.nc	N/A
Accumulated convective precipitation	Monthly Mean of Daily Accumulation	Surface	acpcp.mon.mean.nc	N/A
Accumulated convective precipitation	Longterm Monthly Mean of Daily Accumulation	Surface	acpcp.mon.ltm.nc	N/A
Air Temperature at 2 m	3-hourly value	2m	air.2m.yyyy.nc	N/A
Air Temperature at 2 m	Daily Mean	2m	air.2m.yyyy.nc	N/A
Air Temperature at 2 m	Longterm Daily Mean	2m	air.2m.day.ltm.nc	N/A
Air Temperature at 2 m	Monthly Mean	2m	air.2m.mon.mean.nc	N/A
Air Temperature at 2 m	Longterm Monthly Mean	2m	air.2m.mon.ltm.nc	N/A
Air temperature	3-hourly value	Surface*	air.sfc.yyyy.nc	N/A
Air temperature	Daily Mean	Surface*	air.sfc.yyyy.nc	N/A
Air temperature	Monthly Mean	Surface*	air.sfc.mon.mean.nc	N/A
Air temperature	Longterm Monthly Mean	Surface*	air.sfc.mon.ltm.nc	N/A
Albedo	3-hourly value	Surface	albedo.yyyy.nc	N/A
Albedo	Daily Mean	Surface	albedo.yyyy.nc	N/A
Albedo	Monthly Mean	Surface	albedo.mon.mean.nc	N/A
Albedo	Longterm Monthly Mean	Surface	albedo.mon.ltm.nc	N/A
Accumulated total precipitation	3-hourly Accumulation	Surface	apcp.yyyy.nc	N/A
Accumulated total precipitation	Daily Accumulation	Surface	apcp.yyyy.nc	N/A
Accumulated total precipitation	Monthly average of Daily Accumulation	Surface	apcp.mon.mean.nc	N/A
Accumulated total precipitation	Longterm Monthly Mean of daily totals	Surface	apcp.mon.ltm.nc	N/A
Subsurface Runoff (baseflow)	3-hourly Accumulation	Surface	bgrun.yyyy.nc	N/A
Subsurface Runoff (baseflow)	Daily Accumulation	Surface	bgrun.yyyy.nc	N/A
Subsurface Runoff (baseflow)	Monthly Mean of Daily Accumulations	Surface	bgrun.mon.mean.nc	N/A
Subsurface Runoff (baseflow)	Longterm Monthly Mean	Surface	bgrun.mon.ltm.nc	N/A
Blackadar's Mixing Length Scale	3-hourly value	Surface	bmixl.hl1.yyyy.nc	N/A
Blackadar's Mixing Length Scale	Daily Mean	Surface	bmixl.hl1.yyyy.nc	N/A
Blackadar's Mixing Length Scale	Monthly Mean	Surface	bmixl.sfc.mon.mean.nc	N/A
Blackadar's Mixing Length Scale	Longterm Monthly Mean	Surface	bmixl.sfc.mon.ltm.nc	N/A
Convective Available Potential Energy	3-hourly value	Surface	cape.yyyy.nc	N/A
Convective Available Potential Energy	Daily Mean	Surface	cape.yyyy.nc	N/A
Convective Available Potential Energy	Monthly Mean	Surface	cape.mon.mean.nc	N/A
Convective Available Potential Energy	Longterm Monthly Mean	Surface	cape.mon.ltm.nc	N/A
Canopy Conductance	3-hourly value	Surface	ccond.yyyy.nc	N/A
Canopy Conductance	Daily Mean	Surface	ccond.yyyy.nc	N/A
Canopy Conductance	Monthly Mean	Surface	ccond.mon.mean.nc	N/A
Canopy Conductance	Longterm Monthly Mean	Surface	ccond.mon.ltm.nc	N/A
Mean of Convective Cloud Cover	3-hourly Average	Entire Atmosphere	cdcon.yyyy.nc	N/A
Mean of Convective Cloud Cover	Daily Mean	Entire Atmosphere	cdcon.yyyy.nc	N/A
Mean of Convective Cloud Cover	Monthly Mean	Entire Atmosphere	cdcon.mon.mean.nc	N/A
Mean of Convective Cloud Cover	Longterm Monthly Mean	Entire Atmosphere	cdcon.mon.ltm.nc	N/A
Mean of Non-Convective Cloud Cover	3-hourly Average	Entire Atmosphere	cdlyr.yyyy.nc	N/A
Mean of Non-Convective Cloud Cover	Daily Mean	Entire Atmosphere	cdlyr.yyyy.nc	N/A
Mean of Non-Convective Cloud Cover	Monthly Mean	Entire Atmosphere	cdlyr.mon.mean.nc	N/A
Mean of Non-Convective Cloud Cover	Longterm Monthly Mean	Entire Atmosphere	cdlyr.mon.ltm.nc	N/A
Categorical Freezing Rain	3-hourly forecast	Surface	cfrzr.yyyy.nc	N/A
Categorical Freezing Rain	Daily Mean	Surface	cfrzr.yyyy.nc	N/A
Categorical Freezing Rain	Monthly Mean	Surface	cfrzr.mon.mean.nc	N/A
Categorical Freezing Rain	Longterm Monthly Mean	Surface	cfrzr.mon.ltm.nc	N/A
Categorical Ice Pellets	3-hourly forecast	Surface	cicep.yyyy.nc	N/A
Categorical Ice Pellets	Daily Mean	Surface	cicep.yyyy.nc	N/A
Categorical Ice Pellets	Monthly Mean	Surface	cicep.mon.mean.nc	N/A
Categorical Ice Pellets	Longterm Monthly Mean	Surface	cicep.mon.ltm.nc	N/A
Convective Inhibition	3-hourly value	Surface	cin.yyyy.nc	N/A
Convective Inhibition	Daily Mean	Surface	cin.yyyy.nc	N/A
Convective Inhibition	Monthly Mean	Surface	cin.mon.mean.nc	N/A
Convective Inhibition	Longterm Monthly Mean	Surface	cin.mon.ltm.nc	N/A
Plant Canopy Water	3-hourly value	Surface	cnwat.yyyy.nc	N/A
Plant Canopy Water	Daily Mean	Surface	cnwat.yyyy.nc	N/A
Plant Canopy Water	Monthly Mean	Surface	cnwat.mon.mean.nc	N/A
Plant Canopy Water	Longterm Monthly Mean	Surface	cnwat.mon.ltm.nc	N/A
Categorical Rain	3-hourly forecast	Surface	crain.yyyy.nc	N/A
Categorical Rain	Daily Mean	Surface	crain.yyyy.nc	N/A
Categorical Rain	Monthly Mean	Surface	crain.mon.mean.nc	N/A
Categorical Rain	Longterm Monthly Mean	Surface	crain.mon.ltm.nc	N/A
Categorical Snow	3-hourly forecast	Surface	csnow.yyyy.nc	N/A
Categorical Snow	Daily Mean	Surface	csnow.yyyy.nc	N/A
Categorical Snow	Monthly Mean	Surface	csnow.mon.mean.nc	N/A
Categorical Snow	Longterm Monthly Mean	Surface	csnow.mon.ltm.nc	N/A
Downward Longwave Radiation Flux	3-hourly forecast	Surface	dlwrf.yyyy.nc	N/A
Downward Longwave Radiation Flux	Daily Mean	Surface	dlwrf.yyyy.nc	N/A
Downward Longwave Radiation Flux	Monthly Mean	Surface	dlwrf.mon.mean.nc	N/A
Downward Longwave Radiation Flux	Longterm Monthly Mean	Surface	dlwrf.mon.ltm.nc	N/A
Dew Point Temperature at 2m	3-hourly value	2m	dpt.2m.yyyy.nc	N/A
Dew Point Temperature at 2m	Daily Mean	2m	dpt.2m.yyyy.nc	N/A
Dew Point Temperature at 2m	Monthly Mean	2m	dpt.2m.mon.mean.nc"	N/A
Dew Point Temperature at 2m	Longterm Monthly Mean	2m	dpt.2m.mon.mltmnc"	N/A
Downward Shortwave Radiation Flux	3-hourly average	Surface	dswrf.yyyy.nc	N/A
Downward Shortwave Radiation Flux	Daily Mean	Surface	dswrf.yyyy.nc	N/A
Downward Shortwave Radiation Flux	Monthly Mean	Surface	dswrf.mon.mean.nc	N/A
Downward Shortwave Radiation Flux	Longterm Monthly Mean	Surface	dswrf.mon.ltm.nc	N/A
Accumulated total evaporation	3-hourly Accumulation	Surface	evap.yyyy.nc	N/A
Accumulated total evaporation	Daily Mean	Surface	evap.yyyy.nc	N/A
Accumulated total evaporation	Monthly Mean	Surface	evap.mon.mean.nc	N/A
Accumulated total evaporation	Longterm Monthly Mean	Surface	evap.mon.ltm.nc	N/A
Ground Heat Flux	3-hourly forecast	Surface	gflux.yyyy.nc	N/A
Ground Heat Flux	Daily Mean	Surface	gflux.yyyy.nc	N/A
Ground Heat Flux	Monthly Mean	Surface	gflux.mon.mean.nc	N/A
Ground Heat Flux	Longterm Monthly Mean	Surface	gflux.mon.ltm.nc	N/A
High Cloud Area Fraction	3-hourly forecast	High Cloud Layer	hcdc.yyyy.nc	N/A
High Cloud Area Fraction	Daily Mean	High Cloud Layer	hcdc.yyyy.nc	N/A
High Cloud Area Fraction	Monthly Mean	High Cloud Layer	hcdc.mon.mean.nc	N/A
High Cloud Area Fraction	Longterm Monthly Mean	High Cloud Layer	hcdc.mon.ltm.nc	N/A
Geopotential Height	3-hourly value	Tropopause	hgt.tropo.yyyy.nc	N/A
Geopotential Height	Daily Mean	Tropopause	hgt.tropo.yyyy.nc	N/A
Geopotential Height	Monthly Mean	Tropopause	hgt.tropo.mon.mean.nc	N/A
Geopotential Height	Longterm Monthly Mean	Tropopause	hgt.tropo.mon.ltm.nc	N/A
Storm Relative Helicity	3-hourly value	0-3000m above ground level	hlcy.yyyy.nc	N/A
Storm Relative Helicity	Daily Mean	0-3000m above ground level	hlcy.yyyy.nc	N/A
Storm Relative Helicity	Monthly Mean	0-3000m above ground level	hlcy.mon.mean.nc	N/A
Storm Relative Helicity	Longterm Monthly Mean	0-3000m above ground level	hlcy.mon.ltm.nc	N/A
Planetary Boundary Layer Height	3-hourly value	Surface	hpbl.yyyy.nc	N/A
Planetary Boundary Layer Height	Daily Mean	Surface	hpbl.yyyy.nc	N/A
Planetary Boundary Layer Height	Monthly Mean	Surface	hpbl.mon.mean.nc	N/A
Planetary Boundary Layer Height	Longterm Monthly Mean	Surface	hpbl.mon.ltm.nc	N/A
Low Cloud Area Fraction	3-hourly forecast	Low Cloud Layer	lcdc.yyyy.nc	N/A
Low Cloud Area Fraction	Daily Mean	Low Cloud Layer	lcdc.yyyy.nc	N/A
Low Cloud Area Fraction	Monthly Mean	Low Cloud Layer	lcdc.mon.mean.nc	N/A
Low Cloud Area Fraction	Longterm Monthly Mean	Low Cloud Layer	lcdc.mon.ltm.nc	N/A
Best (4-layer) Lifted Index	3-hourly value	180-0 mb above gnd	lftx4.yyyy.nc	N/A
Best (4-layer) Lifted Index	Daily Mean	180-0 mb above gnd	lftx4.yyyy.nc	N/A
Best (4-layer) Lifted Index	Monthly Mean	180-0 mb above gnd	lftx4.mon.mean.nc	N/A
Best (4-layer) Lifted Index	Longterm Monthly Mean	180-0 mb above gnd	lftx4.mon.ltm.nc	N/A
Latent Heat Flux	3-hourly forecast	Surface	lhtfl.yyyy.nc	N/A
Latent Heat Flux	Daily Mean	Surface	lhtfl.yyyy.nc	N/A
Latent Heat Flux	Monthly Mean	Surface	lhtfl.mon.mean.nc	N/A
Latent Heat Flux	Longterm Monthly Mean	Surface	lhtfl.mon.ltm.nc	N/A
Medium Cloud Area Fraction	3-hourly forecast	Medium Cloud Layer	mcdc.yyyy.nc	N/A
Medium Cloud Area Fraction	Daily Mean	Medium Cloud Layer	mcdc.yyyy.nc	N/A
Medium Cloud Area Fraction	Monthly Mean	Medium Cloud Layer	mcdc.mon.mean.nc	N/A
Medium Cloud Area Fraction	Longterm Monthly Mean	Medium Cloud Layer	mcdc.mon.ltm.nc	N/A
Horizontal Moisture Divergence	3-hourly value	Hybrid level 1	mconv.hl1.yyyy.nc	N/A
Horizontal Moisture Divergence	Daily Mean	Hybrid level 1	mconv.hl1.yyyy.nc	N/A
Horizontal Moisture Divergence	Monthly Mean	Hybrid level 1	mconv.hl1.mon.mean.nc	N/A
Horizontal Moisture Divergence	Longterm Monthly Mean	Hybrid level 1	mconv.hl1.mon.ltm.nc	N/A
Mean Sea Level (ETA model) Pressure	3-hourly value	Mean Sea Level	mslet.yyyy.nc	N/A
Mean Sea Level (ETA model) Pressure	Daily Mean	Mean Sea Level	mslet.yyyy.nc	N/A
Mean Sea Level (ETA model) Pressure	Monthly Mean	Mean Sea Level	mslet.mon.mean.nc	N/A
Mean Sea Level (ETA model) Pressure	Longterm Monthly Mean	Mean Sea Level	mslet.mon.ltm.nc	N/A
Moisture Availability	3-hourly value	Surface	mstav.yyyy.nc	N/A
Moisture Availability	Daily Mean	Surface	mstav.yyyy.nc	N/A
Moisture Availability	Monthly Mean	Surface	mstav.mon.mean.nc	N/A
Moisture Availability	Longterm Monthly Mean	Surface	mstav.mon.ltm.nc	N/A
accumulated potential evaporation	3-hourly Accumulation	Surface	pevap.yyyy.nc	N/A
accumulated potential evaporation	Daily Mean	Surface	pevap.yyyy.nc	N/A
accumulated potential evaporation	Monthly Mean	Surface	pevap.mon.mean.nc	N/A
accumulated potential evaporation	Longterm Monthly Mean	Surface	pevap.mon.ltm.nc	N/A
Potential Temperature	3-hourly value	Surface	pottmp.hl1.yyyy.nc	N/A
Potential Temperature	Daily Mean	Surface	pottmp.hl1.yyyy.nc	N/A
Potential Temperature	Monthly Mean	Surface	pottmp.hl1.mon.mean.nc	N/A
Potential Temperature	Longterm Monthly Mean	Surface	pottmp.hl1.mon.ltm.nc	N/A
Potential Temperature	3-hourly value	Surface	pottmp.sfc.yyyy.nc	N/A
Potential Temperature	Daily Mean	Surface	pottmp.sfc.yyyy.nc	N/A
Potential Temperature	Monthly Mean	Surface	/pottmp.sfc.mon.mean.nc	N/A
Potential Temperature	Longterm Monthly Mean	Surface	/pottmp.sfc.mon.ltm.nc	N/A
Precipitable Water for entire atmosphere	3-hourly value	Surface	pr_wtr.yyyy.n	N/A
Precipitable Water for entire atmosphere	Daily Mean	Surface	pr_wtr.yyyy.nc	N/A
Precipitable Water for entire atmosphere	Monthly Mean	Surface	pr_wtr.mon.mean.nc	N/A
Precipitable Water for entire atmosphere	Longterm Monthly Mean	Surface	pr_wtr.mon.ltm.nc	N/A
Precipitation rate	3-hourly forecast	Surface	prate.yyyy.nc	N/A
Precipitation rate	Daily Mean	Surface	prate.yyyy.nc	N/A
Precipitation rate	Longterm Daily Mean	Surface	prate.day.ltm.nc	N/A
Precipitation rate	Monthly Mean	Surface	prate.mon.mean.nc	N/A
Precipitation rate	Longterm Monthly Mean	Surface	prate.mon.ltm.nc	N/A
Pressure	3-hourly value	Surface	/pres.sfc.yyyy.nc	N/A
Pressure	Daily Mean	Surface	pres.sfc.yyyy.nc	N/A
Pressure	Monthly Mean	Surface	pres.sfc.mon.mean.nc	N/A
Pressure	Longterm Monthly Mean	Surface	pres.sfc.mon.ltm.nc	N/A
Tropopause Pressure	3-hourly value	Tropopause	pres.tropo.yyyy.n	N/A
Tropopause Pressure	Daily Mean	Tropopause	pres.tropo.yyyy.nc	N/A
Tropopause Pressure	Monthly Mean	Tropopause	pres.mon.mean.nc	N/A
Tropopause Pressure	Longterm Monthly Mean	Tropopause	pres.mon.ltm.nc	N/A
Pressure at Mean Sea Level	3-hourly value	Mean Sea Level	prmsl.yyyy.nc	N/A
Pressure at Mean Sea Level	Daily Mean	Mean Sea Level	prmsl.yyyy.nc	N/A
Pressure at Mean Sea Level	Monthly Mean	Mean Sea Level	prmsl.mon.mean.nc	N/A
Pressure at Mean Sea Level	Longterm Monthly Mean	Mean Sea Level	prmsl.mon.ltm.nc	N/A
Humidity Parameter Canopy Conductance	3-hourly value	Surface	rcq.yyyy.nc	N/A
Humidity Parameter Canopy Conductance	Daily Mean	Surface	rcq.yyyy.nc	N/A
Humidity Parameter Canopy Conductance	Monthly Mean	Surface	rcq.mon.mean.nc"	N/A
Humidity Parameter Canopy Conductance	Longterm Monthly Mean	Surface	rcq.mon.mltmnc"	N/A
Solar Parameter Canopy Conductance	3-hourly value	Surface	rcs.yyyy.nc	N/A
Solar Parameter Canopy Conductance	Daily Mean	Surface	rcs.yyyy.nc	N/A
Solar Parameter Canopy Conductance	Longterm Daily Mean	Surface	rcs.mon.ltm.nc	N/A
Solar Parameter Canopy Conductance	Monthly Mean	Surface	rcs.mon.mean.nc	N/A
Solar Parameter Canopy Conductance	Longterm Monthly Mean	Surface	rcs.mon.ltm.nc	N/A
Soil Moisture Parameter Canopy Conductance	3-hourly value	Surface	rcsol.yyyy.nc	N/A
Soil Moisture Parameter Canopy Conductance	Daily Mean	Surface	rcsol.yyyy.nc	N/A
Soil Moisture Parameter Canopy Conductance	Monthly Mean	Surface	rcsol.mon.mean.nc	N/A
Soil Moisture Parameter Canopy Conductance	Longterm Monthly Mean	Surface	rcsol.mon.ltm.nc	N/A
Temperature Parameter Canopy Conductance	3-hourly value	Surface	rct.yyyy.nc	N/A
Temperature Parameter Canopy Conductance	Daily Mean	Surface	rct.yyyy.nc	N/A
Temperature Parameter Canopy Conductance	Monthly Mean	Surface	rct.mon.mean.nc	N/A
Relative Humidity at 2m	3-hourly value	2m	rhum.2m.yyyy.nc	N/A
Relative Humidity at 2m	Daily Mean	2m	rhum.2m.yyyy.nc	N/A
Relative Humidity at 2m	Monthly Mean	2m	rhum.2m.mon.mean.nc	N/A
Relative Humidity at 2m	Longterm Monthly Mean	2m	rhum.2m.mon.ltm.nc	N/A
Sensible Heat Flux	3-hourly forecast	Surface	shtfl.yyyy.nc	N/A
Sensible Heat Flux	Daily Mean	Surface	shtfl.yyyy.nc	N/A
Sensible Heat Flux	Monthly Mean	Surface	shtfl.mon.mean.nc	N/A
Sensible Heat Flux	Longterm Monthly Mean	Surface	shtfl.mon.ltm.nc	N/A
Specific Humidity at 2m	3-hourly value	2m	shum.2m.yyyy.nc	N/A
Specific Humidity at 2m	Daily Mean	2m	shum.2m.yyyy.nc	N/A
Specific Humidity at 2m	Monthly Mean	2m	shum.2m.mon.mean.nc	N/A
Specific Humidity at 2m	Longterm Monthly Mean	2m	shum.2m.mon.ltm.nc	N/A
Snow Depth	3-hourly value	Surface	snod.yyyy.nc	N/A
Snow Depth	Daily Mean	Surface	snod.yyyy.nc	N/A
Snow Depth	Monthly Mean	Surface	snod.mon.mean.nc	N/A
Snow Depth	Longterm Monthly Mean	Surface	snod.mon.ltm.nc	N/A
Snow Phase-change Heat	3-hourly Average	Surface	snohf.yyyy.nc	N/A
Snow Phase-change Heat	Daily Mean	Surface	snohf.yyyy.nc	N/A
Snow Phase-change Heat	Monthly Mean	Surface	snohf.mon.mean.nc	N/A
Snow Phase-change Heat	Longterm Monthly Mean	Surface	snohf.mon.ltm.nc	N/A
Snow Melt	3-hourly Accumulation	Surface	snom.yyyy.nc	N/A
Snow Melt	Daily Mean	Surface	snom.yyyy.nc	N/A
Snow Melt	Monthly Mean	Surface	snom.mon.mean.nc	N/A
Snow Melt	Longterm Monthly Mean	Surface	snom.mon.ltm.nc	N/A
Snow Cover	3-hourly value	Surface	snowc.yyyy.nc	N/A
Snow Cover	Daily Mean	Surface	snowc.yyyy.nc	N/A
Snow Cover	Monthly Mean	Surface	snowc.mon.mean.nc	N/A
Snow Cover	Longterm Monthly Mean	Surface	snowc.mon.ltm.nc	N/A
Soil Moisture Content	3-hourly value	Surface	soilm.yyyy.nc	N/A
Soil Moisture Content	Daily Mean	Surface	soilm.yyyy.nc	N/A
Soil Moisture Content	Monthly Mean	Surface	soilm.mon.mean.nc	N/A
Soil Moisture Content	Longterm Monthly Mean	Surface	soilm.mon.ltm.nc	N/A
Surface Runoff (non-infiltrating)	3-hourly Accumulation	Surface	ssrun.yyyy.nc	N/A
Surface Runoff (non-infiltrating)	Daily Mean	Surface	ssrun.yyyy.nc	N/A
Surface Runoff (non-infiltrating)	Monthly Mean	Surface	ssrun.mon.mean.nc	N/A
Surface Runoff (non-infiltrating)	Longterm Monthly Mean	Surface	ssrun.mon.ltm.nc	N/A
Forecast of Total Cloud Cover	3-hourly forecast	Entire Atmosphere	tcdc.yyyy.nc	N/A
Forecast of Total Cloud Cover	Daily Mean	Entire Atmosphere	tcdc.yyyy.nc	N/A
Forecast of Total Cloud Cover	Monthly Mean	Entire Atmosphere	tcdc.mon.mean.nc	N/A
Forecast of Total Cloud Cover	Longterm Monthly Mean	Entire Atmosphere	tcdc.mon.ltm.nc	N/A
Turbulent Kinetic Energy	3-hourly value	Surface	tke.hl1.yyyy.nc	N/A
Turbulent Kinetic Energy	Daily Mean	Surface	tke.hl1.yyyy.nc	N/A
Turbulent Kinetic Energy	Monthly Mean	Surface	tke.hl1.mon.mean.nc	N/A
Turbulent Kinetic Energy	Longterm Monthly Mean	Surface	tke.hl1.mon.ltm.nc	N/A
Upward Longwave Radiation Flux	3-hourly Average	Top of Atmosphere	ulwrf.ntat.yyyy.nc	N/A
Upward Longwave Radiation Flux	Daily Mean	Top of Atmosphere	ulwrf.ntat.yyyy.nc	N/A
Upward Longwave Radiation Flux	Monthly Mean	Top of Atmosphere	ulwrf.ntat.mon.mean.nc	N/A
Upward Longwave Radiation Flux	Longterm Monthly Mean	Top of Atmosphere	ulwrf.ntat.mon.ltm.nc	N/A
Upward Longwave Radiation Flux	3-hourly forecast	Surface	ulwrf.sfc.yyyy.nc	N/A
Upward Longwave Radiation Flux	Daily Mean	Surface	ulwrf.sfc.yyyy.nc	N/A
Upward Longwave Radiation Flux	Monthly Mean	Surface	ulwrf.sfc.mon.mean.nc	N/A
Upward Longwave Radiation Flux	Longterm Monthly Mean	Surface	ulwrf.sfc.mon.ltm.nc	N/A
U-component of Storm Motion	3-hourly value	0-6000m above ground level	ustm.yyyy.nc	N/A
U-component of Storm Motion	Daily Mean	0-6000m above ground level	ustm.yyyy.nc	N/A
U-component of Storm Motion	Monthly Mean	0-6000m above ground level	ustm.mon.mean.nc	N/A
U-component of Storm Motion	Longterm Monthly Mean	0-6000m above ground level	ustm.mon.ltm.nc	N/A
Upward Shortwave Radiation Flux	3-hourly Average	Top of Atmosphere	uswrf.ntat.yyyy.nc	N/A
Upward Shortwave Radiation Flux	Daily Mean	Top of Atmosphere	uswrf.ntat.yyyy.nc	N/A
Upward Shortwave Radiation Flux	Monthly Mean	Top of Atmosphere	uswrf.ntat.mon.mean.nc	N/A
Upward Shortwave Radiation Flux	Longterm Monthly Mean	Top of Atmosphere	uswrf.ntat.mon.ltm.nc	N/A
Upward Shortwave Radiation Flux	3-hourly Average	Surface	uswrf.sfc.yyyy.nc	N/A
Upward Shortwave Radiation Flux	Daily Mean	Surface	uswrf.sfc.yyyy.nc	N/A
Upward Shortwave Radiation Flux	Monthly Mean	Surface	uswrf.sfc.mon.mean.nc	N/A
Upward Shortwave Radiation Flux	Longterm Monthly Mean	Surface	uswrf.sfc.mon.ltm.nc	N/A
U-wind at 10 m	3-hourly value	10m	uwnd.10m.yyyy.nc	N/A
U-wind at 10 m	Daily Mean	10m	uwnd.10m.yyyy.nc	N/A
U-wind at 10 m	Longterm Daily Mean	10m	uwnd.10m.mon.ltm.nc	N/A
U-wind at 10 m	Monthly Mean	10m	uwnd.10m.mon.mean.nc	N/A
U-wind at 10 m	Longterm Monthly Mean	10m	uwnd.10m.mon.ltm.nc	N/A
Vegetation	3-hourly value	Surface	veg.yyyy.nc	N/A
Vegetation	Daily Mean	Surface	veg.yyyy.nc	N/A
Vegetation	Monthly Mean	Surface	veg.mon.mean.nc	N/A
Vegetation	Longterm Monthly Mean	Surface	veg.mon.ltm.nc	N/A
Visibility	3-hourly value	Surface	vis.yyyy.nc	N/A
Visibility	Daily Mean	Surface	vis.yyyy.nc	N/A
Visibility	Monthly Mean	Surface	vis.mon.mean.nc	N/A
Visibility	Longterm Monthly Mean	Surface	vis.mon.ltm.nc	N/A
V-component of Storm Motion	3-hourly value	0-6000m above ground level	vstm.yyyy.nc	N/A
V-component of Storm Motion	Daily Mean	0-6000m above ground level	vstm.yyyy.nc	N/A
V-component of Storm Motion	Monthly Mean	0-6000m above ground level	vstm.mon.mean.nc	N/A
V-component of Storm Motion	Longterm Monthly Mean	0-6000m above ground level	vstm.mon.mltmnc	N/A
Pressure Vertical Velocity	3-hourly value	Hybrid level 1	vvel.hl1.yyyy.nc	N/A
Pressure Vertical Velocity	Daily Mean	Hybrid level 1	vvel.hl1.yyyy.nc	N/A
Pressure Vertical Velocity	Monthly Mean	Hybrid level 1	vvel.hl1.mon.mean.nc	N/A
Pressure Vertical Velocity	Longterm Monthly Mean	Hybrid level 1	vvel.hl1.mon.ltm.nc	N/A
V-wind at 10 m	3-hourly value	10m	vwnd.10m.yyyy.nc	N/A
V-wind at 10 m	Daily Mean	10m	vwnd.10m.yyyy.nc	N/A
V-wind at 10 m	Longterm Daily Mean	10m	vwnd.10m.day.ltm.nc	N/A
V-wind at 10 m	Monthly Mean	10m	vwnd.10m.mon.mean.nc	N/A
V-wind at 10 m	Longterm Monthly Mean	10m	vwnd.10m.mon.ltm.nc	N/A
Vertical Speed Shear	3-hourly value	Tropopause	vwsh.tropo.yyyy.nc	N/A
Vertical Speed Shear	Daily Mean	Tropopause	vwsh.tropo.yyyy.nc	N/A
Vertical Speed Shear	Monthly Mean	Tropopause	vwsh.tropo.mon.mean.nc	N/A
Vertical Speed Shear	Longterm Monthly Mean	Tropopause	vwsh.tropo.mon.ltm.nc	N/A
Water Condensate Flux Convergence Accumulation	3-hourly Accumulation	Entire Atmosphere	wcconv.yyyy.nc	N/A
Water Condensate Flux Convergence Accumulation	Daily Mean	Entire Atmosphere	wcconv.yyyy.nc	N/A
Water Condensate Flux Convergence Accumulation	Monthly Mean	Entire Atmosphere	wcconv.mon.mean.nc	N/A
Water Condensate Flux Convergence Accumulation	Longterm Monthly Mean	Entire Atmosphere	wcconv.mon.ltm.nc	N/A
Water Condensate Added by Precip. Assimilation Accumulation	3-hourly Accumulation	Entire Atmosphere	wcinc.yyyy.nc	N/A
Water Condensate Added by Precip. Assimilation Accumulation	Daily Mean	Entire Atmosphere	wcinc.yyyy.nc	N/A
Water Condensate Added by Precip. Assimilation Accumulation	Monthly Mean	Entire Atmosphere	wcinc.mon.mean.nc	N/A
Water Condensate Added by Precip. Assimilation Accumulation	Longterm Monthly Mean	Entire Atmosphere	wcinc.mon.ltm.nc	N/A
Water Condensate Zonal Flux Accumulation	3-hourly Accumulation	Entire Atmosphere	wcuflx.yyyy.nc	N/A
Water Condensate Zonal Flux Accumulation	Daily Mean	Entire Atmosphere	wcuflx.yyyy.nc	N/A
Water Condensate Zonal Flux Accumulation	Monthly Mean	Entire Atmosphere	wcuflx.mon.mean.nc	N/A
Water Condensate Meridional Flux Accumulation	3-hourly Accumulation	Entire Atmosphere	wcvflx.yyyy.nc	N/A
Water Condensate Meridional Flux Accumulation	Daily Mean	Entire Atmosphere	wcvflx.yyyy.nc	N/A
Water Condensate Meridional Flux Accumulation	Monthly Mean	Entire Atmosphere	wcvflx.mon.mean.nc	N/A
Water Condensate Meridional Flux Accumulation	Longterm Monthly Mean	Entire Atmosphere	wcvflx.mon.ltm.nc	N/A
Accumulated Snow	3-hourly forecast	Surface	weasd.yyyy.nc	N/A
Accumulated Snow	Daily Mean	Surface	weasd.yyyy.nc	N/A
Accumulated Snow	Monthly Mean	Surface	weasd.mon.mean.nc	N/A
Accumulated Snow	Longterm Monthly Mean	Surface	weasd.mon.ltm.nc	N/A
Water Vapor Flux Convergence Accumulation	3-hourly Accumulation	Entire Atmosphere	wvconv.yyyy.nc	N/A
Water Vapor Flux Convergence Accumulation	Daily Mean	Entire Atmosphere	wvconv.yyyy.nc	N/A
Water Vapor Flux Convergence Accumulation	Monthly Mean	Entire Atmosphere	wvconv.mon.mean.nc	N/A
Water Vapor Flux Convergence Accumulation	Longterm Monthly Mean	Entire Atmosphere	wvconv.mon.ltm.nc	N/A
Water Vapor Added by Precip. Assimilation Accumulation	3-hourly Accumulation	Entire Atmosphere	wvinc.yyyy.nc	N/A
Water Vapor Added by Precip. Assimilation Accumulation	Daily Mean	Entire Atmosphere	wvinc.yyyy.nc	N/A
Water Vapor Added by Precip. Assimilation Accumulation	Monthly Mean	Entire Atmosphere	wvinc.mon.mean.nc	N/A
Water Vapor Added by Precip. Assimilation Accumulation	Longterm Monthly Mean	Entire Atmosphere	wvinc.mon.ltm.nc	N/A
Water Vapor Zonal Flux Accumulation	3-hourly Accumulation	Entire Atmosphere	wvuflx.yyyy.nc	N/A
Water Vapor Zonal Flux Accumulation	Daily Mean	Entire Atmosphere	wvuflx.yyyy.nc	N/A
Water Vapor Zonal Flux Accumulation	Monthly Mean	Entire Atmosphere	wvuflx.mon.mean.nc	N/A
Water Vapor Zonal Flux Accumulation	Longterm Monthly Mean	Entire Atmosphere	wvuflx.mon.ltm.nc	N/A
Water Vapor Meridional Flux Accumulation	3-hourly Accumulation	Surface	wvvflx.yyyy.nc	N/A
Water Vapor Meridional Flux Accumulation	Daily Mean	Entire Atmosphere	wvvflx.yyyy.nc	N/A
Water Vapor Meridional Flux Accumulation	Monthly Mean	Entire Atmosphere	wvvflx.mon.mean.nc	N/A
Water Vapor Meridional Flux Accumulation	Longterm Monthly Mean	Entire Atmosphere	wvvflx.mon.ltm.nc	N/A

Values labeled 3 hourly values are output at that exact time (no averaging).
Values labeled accumulations are 3 hours later.
Values labeled 3 hourly averages are averaged over 0 to 3 hr later.

Time-Invariant Data

Download/Plot Data: (FTP Access) Monolevel Data

Variable	Statistic	Level	Download File	Create Plot/Subset
Surface Geopotential Height	--	Surface	hgt.sfc.nc	N/A
Land-sea mask	--	Surface	land.nc	N/A

* What is Surface Temperature

Also Available Plotting Pages:

• Monthly/Seasonal Composites
• Daily Composites
• 3-Hourly Composites

Usage Restrictions:

• None

Detailed Description:

• The NARR project is an extension of the NCEP Global Reanalysis which is run over the North American Region. The NARR model uses the very high resolution NCEP Eta Model (32km/45 layer) together with the Regional Data Assimilation System (RDAS) which, significantly, assimilates precipitation along with other variables. The improvements in the model/assimilation have resulted in a dataset with substantial improvements in the accuracy of temperature, winds and precipitation compared to the NCEP-DOE Global Reanalysis 2. We currently have output from Jun 2006 which includes 8 times daily data at 29 levels and most of the variables. For a complete list of model output variables, see NCEP's variable list.
• Additional information can be found at NCEP's NARR page.
• A discussion of the sign convention for radiative fluxis is available.

Caveats:

• Useful information can be found at NCEP's NARR FAQ page and from Albany's Department of Atmospheric Science NARR Usage Notes .
• The acpcp values for 0Z 1 October 1994 and 3Z 11 June 2005 seem to be in error.

Related File Naming & Structure Information:

File Names:

• 8-times daily and daily File names are composed of variable abbreviations and year: (variable).(year).nc(In directory: /Datasets/NARR/monolevel/ or /Datasets/NARR/Dailies/monolevel)
• Monthly means/ltms are (variable).mon.mean.nc in /Datasets/NARR/Monthlies/monolevel

Dataset Format and Size:

• All data are stored in PSL standard NetCDF4 files
• The data are divided by variable and year into separate files
• There are 2100 files currently
• Size of file is about 1.4G per variable per year/month for 8xdaily data
• Size of file is about 68M per variable per /month for monthly data
• Current total of 29.4 Tbytes for 8xDaily.

• 8x daily data are available from ftp.cdc.noaa.gov in /Datasets/NARR/.
• The 8x data files are quite large, so you may only be able to download them if you have a fast network connection.

Missing Data:

• Missing data is flagged with a value of 9.96921e+36f.

Citation:

• Please note: If you acquire NARR data products from PSL, we ask that you acknowledge us in your use of the data. This may be done by including text such as NARR data provided by the NOAA/OAR/ESRL PSL, Boulder, Colorado, USA, from their Web site at / in any documents or publications using these data. We would also appreciate receiving a copy of the relevant publications. This will help PSL to justify keeping the NARR data set freely available online in the future. Thank you!
• NORTH AMERICAN REGIONAL REANALYSIS: A long-term, consistent, high-resolution climate dataset for the North American domain, as a major improvement upon the earlier global reanalysis datasets in both resolution and accuracy, Fedor Mesinger et. al, submitted to BAMS 2004.

References:

• NORTH AMERICAN REGIONAL REANALYSIS: A long-term, consistent, high-resolution climate dataset for the North American domain, as a major improvement upon the earlier global reanalysis datasets in both resolution and accuracy, Fedor Mesinger et. al, submitted to BAMS 2004.

Original Source:

• Dataset was originally produced at NOAA's National Center for Atmospheric Prediction (NCEP) and is available in it's original grib format through NOAA NCDC's access page. It is also available in the same format from NCAR.

Contact:

• Physical Sciences Laboratory: Data Management
  NOAA/ESRL/PSL
  325 Broadway
  Boulder, CO 80305-3328
  psl.data@noaa.gov