Grib Filter gefs_chem

Available Data Dates:

gefs.20260222
gefs.20260221
gefs.20260220
gefs.20260219

Cycle:

Subdirectories:

chem

pgrb2ap5

Available Files (file size):

all 1 hybrid level 2 hybrid level 3 hybrid level 4 hybrid level 5 hybrid level 6 hybrid level 7 hybrid level 8 hybrid level 9 hybrid level 10 hybrid level 11 hybrid level 12 hybrid level 13 hybrid level 14 hybrid level 15 hybrid level 16 hybrid level 17 hybrid level 18 hybrid level 19 hybrid level 20 hybrid level 21 hybrid level 22 hybrid level 23 hybrid level 24 hybrid level 25 hybrid level 26 hybrid level 27 hybrid level 28 hybrid level 29 hybrid level 30 hybrid level 31 hybrid level 32 hybrid level 33 hybrid level 34 hybrid level 35 hybrid level 36 hybrid level 37 hybrid level 38 hybrid level 39 hybrid level 40 hybrid level 41 hybrid level 42 hybrid level 43 hybrid level 44 hybrid level 45 hybrid level 46 hybrid level 47 hybrid level 48 hybrid level 49 hybrid level 50 hybrid level 51 hybrid level 52 hybrid level 53 hybrid level 54 hybrid level 55 hybrid level 56 hybrid level 57 hybrid level 58 hybrid level 59 hybrid level 60 hybrid level 61 hybrid level 62 hybrid level 63 hybrid level 64 hybrid level

make subregion:	top latitude
	left longitude	right longitude
	bottom latitude

In order to not overload the server, please pause before resubmitting requests.

Click on a level name to show the variables that match that level. Variables that are specific to that level will be underlined and highlighted in yellow.
Click the checkbox to the left of a level name to select that level for the gribfilter download request.
Click the "Check Highlighted" button to check the checkbox of every underlined/highlighted level. (The levels are underlined/highlighted by clicking on a variable name.)
Check "all" to download all levels. When "all" is checked, it does not matter if any other levels are checked - all levels are included.
Note that the gribfilter download request only includes levels that are checked. Underlined/highlighted level names that are not checked are not included.
Note that some levels are not specific to any variable. To get data for these levels, click on "all" variables.

Hover over a variable abbreviation to display the full variable name.
Click on a variable name to find the levels that match that variable. Levels that are specific to that variable will be underlined and highlighted in yellow.
Click on the checkbox to the left of a variable abbreviation to select that variable for the gribfilter download request.
Click the "Check Highlighted" button to check the checkbox of every underlined/highlighted variable. (The variables are underlined/highlighted by clicking on a level name.)
Note that the gribfilter download request only includes variables that are checked. Underlined/highlighted variables that are not checked are not included in the gribfilter request.
Check "all" to download all variables. When "all" is checked, it does not matter if any other variables are checked - all variables are included in the request.
Note that some variables are not specific to any layer. To get data for these variables, click on "all" variables.

NCEP NOMADS Version 2.3.8, January 2026

NCEP GEFS CHEM 0.5 Degree Model Forecasts

Available Data Dates:

Cycle:

Subdirectories:

Available Files (file size):

Parameters

Levels

Subregion

Download

NCEP GEFS CHEM 0.5 Degree Model Forecasts

Available Data Dates:

Cycle:

Subdirectories:

Available Files (file size):

Parameters Check Highlighted Check All Parameters Uncheck All Parameters

Levels Check Highlighted Check All Levels Uncheck All Levels

Subregion

Download

Parameters

Levels