Table D2
| Explanation of Data Designators T1T2A1A2ii CCCC |
| TABLE D2 Level designator ii (when T1 = D, G, H, J, P, Q, X or Y) |
| Instructions for the proper application of the level designators |
| (1) | The designator specified in this table should be used to the greatest extent possible to indicate the level of the data contained within the text of the bulletin |
| (2) | When data at more than one level are contained in the text, the designator for only one of the levels should be used. |
| (3) | When the table does not contain a suitable designator for the level, a designator which is not assigned in the table should be used. |
| T1 | Level Designator ii | Depth (in meters) |
| D, G, H, J, P, Q, X or Y | 99 | 1000 hPa |
| D, G, H, J, P, Q, X or Y | 98 | Air priorities for the Earth's surface |
| D, G, H, J, P, Q, X or Y | 97 | Level of the tropopause |
| D, G, H, J, P, Q, X or Y | 96 | Level of maximum wind |
| D, G, H, J, P, Q, X or Y | 95 | 950 hPa |
| D, G, H, J, P, Q, X or Y | 94 | Level of 0 Degrees C isotherm |
| D, G, H, J, P, Q, X or Y | 93 | 975 hPa |
| D, G, H, J, P, Q, X or Y | 92 | 925 hPa |
| D, G, H, J, P, Q, X or Y | 91 | 875 hPa |
| D, G, H, J, P, Q, X or Y | 90 | 900 hPa |
| D, G, H, J, P, Q, X or Y | 89 | Any parameter reduced to sea level (eg MSLP) |
| D, G, H, J, P, Q, X or Y | 88 | Ground or water properties for the Earth's surface (ie snow cover, wave and swell) |
| D, G, H, J, P, Q, X or Y | 87 | 1000-500 hPa thickness |
| D, G, H, J, P, Q, X or Y | 86 | Boundary level |
| D, G, H, J, P, Q, X or Y | 85 | 850 hPa |
| D, G, H, J, P, Q, X or Y | 84 | 840 hPa |
| D, G, H, J, P, Q, X or Y | 83 | 830 hPa |
| D, G, H, J, P, Q, X or Y | 82 | 825 hPa |
| D, G, H, J, P, Q, X or Y | 81 | 810 hPa |
| D, G, H, J, P, Q, X or Y | 80 | 800 hPa |
| D, G, H, J, P, Q, X or Y | 79 | 790 hPa |
| D, G, H, J, P, Q, X or Y | 78 | 780 hPa |
| D, G, H, J, P, Q, X or Y | 77 | 775 hPa |
| D, G, H, J, P, Q, X or Y | 76 | 760 hPa |
| D, G, H, J, P, Q, X or Y | 75 | 750 hPa |
| D, G, H, J, P, Q, X or Y | 74 | 740 hPa |
| D, G, H, J, P, Q, X or Y | 73 | 730 hPa |
| D, G, H, J, P, Q, X or Y | 72 | 725 hPa |
| D, G, H, J, P, Q, X or Y | 71 | 710 hPa |
| D, G, H, J, P, Q, X or Y | 70 | 700 hPa |
| D, G, H, J, P, Q, X or Y | 69 | 690 hPa |
| D, G, H, J, P, Q, X or Y | 68 | 680 hPa |
| D, G, H, J, P, Q, X or Y | 67 | 675 hPa |
| D, G, H, J, P, Q, X or Y | 66 | 660 hPa |
| D, G, H, J, P, Q, X or Y | 65 | 650 hPa |
| D, G, H, J, P, Q, X or Y | 64 | 640 hPa |
| D, G, H, J, P, Q, X or Y | 63 | 630 hPa |
| D, G, H, J, P, Q, X or Y | 62 | 625 hPa |
| D, G, H, J, P, Q, X or Y | 61 | 610 hPa |
| D, G, H, J, P, Q, X or Y | 60 | 600 hPa |
| D, G, H, J, P, Q, X or Y | 59 | 590 hPa |
| D, G, H, J, P, Q, X or Y | 58 | 580 hPa |
| D, G, H, J, P, Q, X or Y | 57 | 570 hPa |
| D, G, H, J, P, Q, X or Y | 56 | 560 hPa |
| D, G, H, J, P, Q, X or Y | 55 | 550 hPa |
| D, G, H, J, P, Q, X or Y | 54 | 540 hPa |
| D, G, H, J, P, Q, X or Y | 53 | 530 hPa |
| D, G, H, J, P, Q, X or Y | 52 | 520 hPa |
| D, G, H, J, P, Q, X or Y | 51 | 510 hPa |
| D, G, H, J, P, Q, X or Y | 50 | 500 hPa |
| D, G, H, J, P, Q, X or Y | 49 | 490 hPa |
| D, G, H, J, P, Q, X or Y | 48 | 480 hPa |
| D, G, H, J, P, Q, X or Y | 47 | 470 hPa |
| D, G, H, J, P, Q, X or Y | 46 | 460 hPa |
| D, G, H, J, P, Q, X or Y | 45 | 450 hPa |
| D, G, H, J, P, Q, X or Y | 44 | 440 hPa |
| D, G, H, J, P, Q, X or Y | 43 | 430 hPa |
| D, G, H, J, P, Q, X or Y | 42 | 420 hPa |
| D, G, H, J, P, Q, X or Y | 41 | 410 hPa |
| D, G, H, J, P, Q, X or Y | 40 | 400 hPa |
| D, G, H, J, P, Q, X or Y | 39 | 390 hPa |
| D, G, H, J, P, Q, X or Y | 38 | 380 hPa |
| D, G, H, J, P, Q, X or Y | 37 | 370 hPa |
| D, G, H, J, P, Q, X or Y | 36 | 360 hPa |
| D, G, H, J, P, Q, X or Y | 35 | 350 hPa |
| D, G, H, J, P, Q, X or Y | 34 | 340 hPa |
| D, G, H, J, P, Q, X or Y | 33 | 330 hPa |
| D, G, H, J, P, Q, X or Y | 32 | 320 hPa |
| D, G, H, J, P, Q, X or Y | 31 | 310 hPa |
| D, G, H, J, P, Q, X or Y | 30 | 300 hPa |
| D, G, H, J, P, Q, X or Y | 29 | 290 hPa |
| D, G, H, J, P, Q, X or Y | 28 | 280 hPa |
| D, G, H, J, P, Q, X or Y | 27 | 270 hPa |
| D, G, H, J, P, Q, X or Y | 26 | 260 hPa |
| D, G, H, J, P, Q, X or Y | 25 | 250 hPa |
| D, G, H, J, P, Q, X or Y | 24 | 240 hPa |
| D, G, H, J, P, Q, X or Y | 23 | 230 hPa |
| D, G, H, J, P, Q, X or Y | 22 | 220 hPa |
| D, G, H, J, P, Q, X or Y | 21 | 210 hPa |
| D, G, H, J, P, Q, X or Y | 20 | 200 hPa |
| D, G, H, J, P, Q, X or Y | 19 | 190 hPa |
| D, G, H, J, P, Q, X or Y | 18 | 180 hPa |
| D, G, H, J, P, Q, X or Y | 17 | 170 hPa |
| D, G, H, J, P, Q, X or Y | 16 | 160 hPa |
| D, G, H, J, P, Q, X or Y | 15 | 150 hPa |
| D, G, H, J, P, Q, X or Y | 14 | 140 hPa |
| D, G, H, J, P, Q, X or Y | 13 | 130 hPa |
| D, G, H, J, P, Q, X or Y | 12 | 120 hPa |
| D, G, H, J, P, Q, X or Y | 11 | 110 hPa |
| D, G, H, J, P, Q, X or Y | 10 | 100 hPa |
| D, G, H, J, P, Q, X or Y | 09 | 090 hPa |
| D, G, H, J, P, Q, X or Y | 08 | 080 hPa |
| D, G, H, J, P, Q, X or Y | 07 | 070 hPa |
| D, G, H, J, P, Q, X or Y | 06 | 060 hPa |
| D, G, H, J, P, Q, X or Y | 05 | 050 hPa |
| D, G, H, J, P, Q, X or Y | 04 | 040 hPa |
| D, G, H, J, P, Q, X or Y | 03 | 030 hPa |
| D, G, H, J, P, Q, X or Y | 02 | 020 hPa |
| D, G, H, J, P, Q, X or Y | 01 | 010 hPa |
| D, G, H, J, P, Q, X or Y | 00 | Entire atmosphere (eg precipitable water) |