stable
Register: MOS 2000 Present Weather Codes
URI: https://codes.nws.noaa.gov/StatPP/Data/Met/Wx/M2KCodedWx
In the MOS 2000 system, a coded representation of present weather information captured from an observation (e.g., METAR). This information is distilled into three integers (with inherent data loss). This collection interprets the coded values. For an explanation, see TDL (MDL) Office Note 00-1, 13.21-22.
Contents
| Name | Notation | Description | Types | Status |
|---|---|---|---|---|
| No weather | 0 | No weather reported | Concept | stable |
| Mist | 10 | BR (Mist with visibility > 5/8 sm and < 6 sm) | Concept | stable |
| Spray | 11 | PY (Spray) | Concept | stable |
| Unknown precipitation | 121 | UP (Unknown precipitation from ASOS) | Concept | stable |
| Heavy freezing drizzle | 156 | +FZDZ (Heavy freezing drizzle, AUTO only) | Concept | stable |
| Showers in vicinity | 16 | VCSH (Showers within sight, between 5 and 10 miles from the s... | Concept | stable |
| Heavy freezing rain | 166 | +FZRA (Heavy freezing rain, AUTO only) | Concept | stable |
| Dry thunderstorm/thunderstorm in vicinity | 17 | TS, VCTS (Thunderstorms with no precipitation, also thunderst... | Concept | stable |
| Light ice pellets | 174 | -PE, -PL (Light ice pellets, AUTO only) | Concept | stable |
| Heavy ice pellets | 176 | +PE, +PL (Heavy ice pellets, AUTO only) | Concept | stable |
| Squalls | 18 | SQ (Squalls) | Concept | stable |
| Heavy rain shower | 183 | +SHRA (Heavy rain showers, augmented ASOS only) | Concept | stable |
| Heavy snow shower | 187 | +SHSN (Heavy snow showers, augmented ASOS only) | Concept | stable |
| Tornado/waterspout/funnel cloud | 19 | +FC, FC (Tornado or waterspout, also funnel cloud) | Concept | stable |
| Heavy thunderstorm with hail | 196 | +TSGR (Thunderstorm, heavy with hail) | Concept | stable |
| Volcanic ash | 204 | VA (Volcanic ash) | Concept | stable |
| Blowing spray | 207 | BLPY (Blowing spray) | Concept | stable |
| Drifting dust/sand | 208 | DRDU, DRSS (Drifting dust, also drifting sand) | Concept | stable |
| Light/moderate dust/sand storm | 31 | DS, -DS, SS, -SS (Moderate duststorm, also light duststorm or... | Concept | stable |
| Heavy dust/sand storm | 34 | +DS, +SS (Heavy duststorm, also heavy sandstorm) | Concept | stable |
| Drifting snow | 36 | DRSN (Drifting snow) | Concept | stable |
| Heavy drifting snow | 37 | +DRSN (Heavy drifting snow) | Concept | stable |
| Blowing snow | 38 | BLSN, -BLSN, BLSA, DRSN (Blowing snow. In MOS2000: with or w... | Concept | stable |
| Heavy blowing snow | 39 | +BLSN (Heavy blowing snow (MANU)) | Concept | stable |
| Smoke | 4 | FU (Smoke) | Concept | stable |
| Fog in vicinity | 40 | VCFG (Fog between 5 and 10 miles from the station) | Concept | stable |
| Patchy fog | 41 | BCFG (Patchy fog) | Concept | stable |
| Partial fog | 44 | PRFG (Partial fog) | Concept | stable |
| Fog | 45 | FG, MIFG (Fog, visibility < 5/8 sm) | Concept | stable |
| Haze | 5 | HZ (Haze) | Concept | stable |
| Light drizzle | 51 | -DZ (Light continuous drizzle) | Concept | stable |
| Moderate drizzle | 53 | DZ (Moderate continuous drizzle) | Concept | stable |
| Heavy drizzle | 55 | +DZ (Heavy continuous drizzle) | Concept | stable |
| Light freezing drizzle | 56 | -FZDZ (Light freezing drizzle) | Concept | stable |
| Moderate/heavy freezing drizzle | 57 | FZDZ, +FZDZ (Moderate or heavy freezing drizzle) | Concept | stable |
| Light rrain and drizzle | 58 | -RADZ, -DZRA (Light rain and drizzle) | Concept | stable |
| Moderate/heavy rain and drizzle | 59 | RADZ, +RADZ, DZRA, +DZRA (Moderate or heavy rain and drizzle) | Concept | stable |
| Dust | 6 | DU (Dust) | Concept | stable |
| Light rain | 61 | -RA (Light rain) | Concept | stable |
| Moderate rain | 63 | RA (Moderate rain) | Concept | stable |
| Heavy rain | 65 | +RA (Heavy rain) | Concept | stable |
| Light freezing rain | 66 | -FZRA (Light freezing rain) | Concept | stable |
| Moderate/heavy freezing rain | 67 | FZRA, +FZRA (Moderate or heavy freezing rain) | Concept | stable |
| Light rain/drizzle and snow | 68 | -RASN, -SNRA, -DZSN, -SNDZ (Light rain or drizzle and snow mi... | Concept | stable |
| Moderate/heavy rain/drizzle and snow | 69 | RASN, SNRA, SNDZ, +RASN,+SNRA, DZSN, +DZSN, +SNDZ (Moderate r... | Concept | stable |
| Blowing dust/sand | 7 | BLDU, BLSA (Blowing dust, blowing sand) | Concept | stable |
| Light snow | 71 | -SN (Light continuous snowfall) | Concept | stable |
| Moderate snow | 73 | SN (Moderate continuous snowfall) | Concept | stable |
| Heavy snow | 75 | +SN (Heavy continuous snowfall) | Concept | stable |
| Ice crystals | 76 | IC (Ice crystals) | Concept | stable |
| Snow grains | 77 | SG, +SG, -SG (Snow grains) | Concept | stable |
| Ice pellets | 79 | PE, PL, +PE, +PL, -PL (ice pellets) (PL after 11/05/98) | Concept | stable |
| Dust or sand whirls | 8 | PO, VCPO (Dust whirls or sand whirls, dust or sand between 5 ... | Concept | stable |
| Light rain shower | 80 | -SHRA (Light rain shower) | Concept | stable |
| Moderate/heavy rain shower | 81 | SHRA, +SHRA (Moderate or heavy rain shower) | Concept | stable |
| Light rain and snow shower | 83 | -SHRASN, -SHSNRA (Light showers of rain and snow mixed) | Concept | stable |
| Moderate/heavy rain and snow shower | 84 | SHRASN, SHSNRA, +SHRASN, +SHSNRA (moderate or heavy showers o... | Concept | stable |
| Light snow shower | 85 | -SHSN (Light snow showers) | Concept | stable |
| Moderate/heavy snow shower | 86 | SHSN, +SHSN (Moderate or heavy snow showers) | Concept | stable |
| Small hail | 88 | GS (Small hail < 1/4 inch in diameter or snow pellets) | Concept | stable |
| Dust/sand storm in vicinity | 9 | VCDS, VCSS (Dust storm between 5 and 10 miles from the statio... | Concept | stable |
| Large hail | 90 | GR (Hail > 1/4 inch in diameter) | Concept | stable |
| Thunderstorm with light/moderate rain/snow | 95 | TSRA, -TSRA, -TSSN, TSSN (Thunderstorms with light or moderat... | Concept | stable |
| Thunderstorm with hail | 96 | TSGR, TSGS (Thunderstorm with hail) | Concept | stable |
| Thunderstorm with heavy rain/snow | 97 | +TSRA, +TSSN (Thunderstorm with heavy rain or snow) | Concept | stable |
| Thunderstorm with dust/sand | 98 | TSDS, TSSS, +TSSS, +TSDS (Thunderstorm with dust or sand) | Concept | stable |
| Missing weather | 9999 | missing (station unable to report present weather) | Concept | stable |