Section 1 Reporting, Part 3
In the boxes below, enter your observation values as you would report them on form CNMOC 3141/3. Here are the sky condition and present weather you've observed for the 1400Z report.
Sky Condition, 7/8 sky cover stratocumulus with ceilings about 600 feet; 1/8 sky cover altostratus 11,000 ft.
Present and Past Weather: overcast conditions with occasional light rain showers at the ship.
Previous obs: occasional rain showers observed within last 6 hours, sky cover broken to overcast.
Visibilities: visibility restricted due to low clouds (2/8 nm).
Type your answer in the boxes, then click Done.
The correct encodings are:
| present weather ww: 61 |
primary past wx w1: 8 |
secondary past wx w2: 6 |
low cloud amt Nh: 7 |
low cloud type: 5 |
mid cloud type 9 |
high cloud type 0 |
Check your values against the correct values above. When ww and W1 W2 are non-significant—01, 02, 03 or 0, 1, 2—the group can be encoded as 7000.
CL Cloud
| Priority | Code | CL Cloud Present> |
|---|---|---|
| 1st | 9 | Cumulonimbus present, with or without other CL clouds: The upper part of at least one of the CB clouds present is clearly fibrous or striated. By convention, code figure 9 is used for CBMAM and for those cases in which lightning, thunder or hail indicates the presence of CB but the top is hidden by other clouds. |
| 3 | The upper part of NONE of the CB clouds present is clearly fibrous, striate, or in the form of an anvil. | |
| 2nd | 4 | No Cumulonimbus present: SC formed by the spreading out of CU is present |
| 3rd | 8 | Code figure 4 is not applicable, and CU and SC (not formed by the spreading out of CU) with bases at different levels are present. |
| 2 | Code figures 4 and 8 are not applicable, and TCU or CU of moderate or strong vertical extent are present. | |
| 4th | 1 | No Cumulonimbus present and CL code figures 4, 8 and 2 are not applicable: Predominant type of low cloud is CU with little vertical extent and seemingly flattened, or ragged CU other than bad weather, or both |
| 5 | Predominant type of low cloud is SC other than that formed by the spreading or flattening of CU | |
| 6 | Predominant type of low cloud is ST in a relatively continuous layer, or ragged shreds (other than of bad weather), or both | |
| 7 | Predominant type of low cloud is STFRA of bad weather or CUFRA of bad weather, or both (pannus); usually below AS or NS. |
CM Clouds
| Priority | Code | CM Cloud Present |
| 1st | 9 | Altocumulus present (with or without AS or NS): AC of a chaotic sky is present (generally at several levels), with or without AS or NS. |
| 8 | Code figure 9 is not applicable; and, AC with sproutings in the form of turrets or battlements or AC having the appearance of small cumuliform tufts is present, with or without AS or NS. | |
| 2nd | 7 | Altocumulus present (with AS or NS): Code figures 9 and 8 are not applicable; and, AC or NS is present together with AC. |
| 3rd | 6 | Altocumulus present (with or without AS or NS): Preceding code figures are not applicable; and AC present is formed by the spreading or flattening of CU or CB. |
| 5 | Preceding code figures are not applicable; and, AC present is progressively invading the sky. | |
| 4 | Preceding code figures are not applicable; and, AC present is in the form of semitransparent patches (often almond-shaped, fish-shaped or lenticular), continuously changing in appearance and occurring at one or more levels. | |
| 7 | Preceding code figures are not applicable; and, AC is present at two or more levels, not progressively invading the sky. | |
| 7 | Preceding code figures are not applicable; and predominantly opaque AC is present at one level, not progressively invading the sky. | |
| 3 | Preceding code figures are not applicable; and, predominantly semitransparent or transparent AC is present at one level, not progressively invading the sky. | |
| 4th | 2 | No Altocumulus present: NS or predominantly opaque AS is present |
| 1 | No NS, and AS present is predominantly semitransparent or transparent |
CH Clouds
| Priority | Code | CH Cloud Present |
| 1st | 9 | Cirrocumulus (Alone or Predominant): CC is present or alone, or CC amount is predominant when compared with combined sky cover of any CI and CS present |
| 2nd | 7 | Cirrostratus (with or without CI or CC and code figure 9 is not applicable): CS covers the entire sky (10/10 or 8/8 sky cover). |
| 8 | CS does not cover the whole sky and is not invading the celestial dome. | |
| 6 | CS (or CS and CI) is progressively invading the sky and the continuous veil extends more than 45 degrees above the local horizon but does not cover the while sky. | |
| 5 | CS (or CS and CI) is progressively invading the sky and the continuous veil does not extend more than 45 degrees above the local horizon. | |
| 3rd | 4 | Cirrus (code figure 9 not applicable and no CS present): CI (hooks, filaments or strands) progressively invading the sky and generally growing denser. |
| 3 | Code figure 4 is not applicable; and dense CI present (often in the form of an anvil originated from Cumulonimbus). | |
| 2 | Code figure 4 and 3 are not applicable; and CI present is predominantly dense patches or with sproutings in the form of small tufts or battlements. | |
| 1 | Code figure 4, 3, and 2 are not applicable; and CI present is predominantly in the form of thin filaments, strands or hooks (not progressively invading the sky). |
Present Wx Codes
Present Weather Specification in Order of Priority - Abbreviated
65 - Rain, not freezing, continuous, heavy at time of observation. Encode as +RA.
64 - Rain, not freezing, intermittent, heavy at time of observation. Encode as +RA.
63 - Rain, not freezing, continuous, moderate at time of observation. Encode as RA.
62 - Rain, not freezing, intermittent, moderate at time of observation. Encode as RA.
61 - Rain, not freezing, continuous, light at time of observation. Encode as -RA.
60 - Rain, not freezing, intermittent, light at time of observation. Encode as -RA.
Past Wx Codes
Past Weather Code Specifications in Order of Priority
Code figure |
Weather |
9 |
Thunderstorm(s) with or without precipitation |
8 |
Shower(s) |
7 |
Snow, or rain and snow mixed |
6 |
Rain |
5 |
Drizzle |
4 |
Fog or ice fog, or thick haze |
3 |
Sandstorm, duststorm, or blowing snow |
2 |
Cloud covering more than 1/2 of the sky throughout the |
1 |
Cloud covering more than 1/2 of the sky during part of the appropriate period and covering 1/2 or less during part of the period |
0 |
Cloud covering 1/2 or less of the sky throughout the appropriate period |