18z SLP                00 06 12 18 24 30 36 42 48 54 60 66 72 78 84   90   96   102 108 114 120 126 132 138 144 150 156 162 168 174 180 192 204 12z SLP           00 06 12 18 24 30 36 42 48 54 60 66 72 78 84 90   96   102 108 114 120 126 132 138 144 150 156 162 168 174 180 192 204 06z SLP      00 06 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96   102 108 114 120 126 132 138 144 150 156 162 168 174 180 192 204 00z SLP 00 06 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120 126 132 138 144 150 156 162 168 174 180 192 204

Note: When NCEP is updating model run, you may get mixed days. Watch the date stamp.
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