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National Solar Radiation Data Base User's Manual (1961-1990) |
Table of Contents
Appendix C: 30-Year Summary of Quality Flags
| NSRDB Column | TD-3282 | Element | Values | Remarks | |
|---|---|---|---|---|---|
| Code | Position | ||||
| 096 | PWX1 | XXXXX | Observation Indicator | 0 or 9 | 0 = Weather observation made.
9 = Weather observation not made, or missing. |
| 097 | PWX1 | XXXXX | Occurrence of
Thunderstorm, Tornado, or Squall | 0 - 2, 4,
6 - 9 | 0 = Thunderstorm - lightning and thunder. Wind
gusts less than 25.7 m/s, and hail, if any, less than 1.9 cm diameter. 1 = Heavy or severe thunderstomm - frequent intense lightning and thunder. Wind gusts greater than 25.7 m/s and hail, if any, 1.9 cm or greater diameter. 2 = Report of tornado or waterspout. 4 = Moderate squall - sudden increase of wind speed by at least 8.2 m/s, reaching 11.3 m/s or more and lasting for at least one minute. 6 = Water spout (beginning January 1984) 7 = Funnel cloud (beginning January 1984) 8 = Tomado (beginning January 1984) 9 = None if Observation Indicator element equals 0, else unknown or missing if Observation Indicator element equals 9. |
| 098 | PWX1 | XXXXX | Occurrence of Rain,
Rain Showers, or Freezing Rain | 0 - 9 | 0 = Light rain
1 = Moderate rain 2 = Heavy rain 3 = Light rain showers 4 = Moderate rain showers 5 = Heavy rain showers 6 = Light freezing rain 7 = Moderate freezing rain 8 = Heavy freezing rain 9 = None if Observation Indicator element equals 0, else unknown or missing if Observation Indicator element equals 9. Notes Light = up to 0.25 cm per hour Moderate = 0.28 to 0.76 cm per hour Heavy = greater than 0.76 cm per hour |
| 099 | PWX1 | XXXXX | Occurrence of Rain
Squalls, Drizzle, or Freezing Drizzle | 0, 1,
3 - 9 | 0 = Light rain squalls
1 = Moderate rain squalls 3 = Light drizzle 4 = Moderate drizzle 5 = Heavy drizzle 6 = Light freezing drizzle 7 = Moderate freezing drizzle 8 = Heavy freezing drizzle 9 = None if Observation Indicator element equals 0, v else unknown or missing if Observation Indicator element equals 9. Notes When drizzle or freezing drizzle occurs with other weather phenomena: Light = up to 0.025 cm per hour Moderate = 0.025 to 0.051 cm per hour Heavy = greater than 0.051 cm per hour When drizzle or freezing drizzle occurs alone: Light = visibility 1 km or greater Moderate = visibility between 0.5 and 1 km Heavy = visibility 0.5 km or less |
| 100 | PWX1 | XXXXX | Occurrence of Snow,
Snow Pellets, or Ice Crystals | 0 - 9 | 0 = Light snow
1 = Moderate snow 2 = Heavy snow 3 = Light snow pellets 4 = Moderate snow pellets 5 = Heavy snow pellets 6 = Light ice crystals 7 = Moderate ice crystals 8 = Heavy ice crystals 9 = None if Observation Indicator element equals 0, else unknown or missing if Observation Indicator element equals 9. Notes Beginning in April 1963, any occurrence of ice crystals is recorded as a 7. |
| 101 | PWX2 | XXXXX | Occurrence of Snow
Showers, or Snow Squalls | 0 - 5, 9 | 0 = Light snow showers
1 = Moderate snow showers 2 = Heavy snow showers 3 = Light snow squall 4 = Moderate snow squall 5 = Heavy snow squall 9 = None if Observation Indicator element equals 0, else unknown or missing if Observation Indicator element equals 9. |
| 102 | PWX2 | XXXXX | Occurrence of Sleet,
Sleet Showers, or Hail | 0 - 2,
4, 9 | 0 = Light ice pellet showers
1 = Moderate ice pellet showers 2 = Heavy ice pellet showers 4 = Hail 9 = None if Observation Indicator element equals 0, else unknown or missing if Observation Indicator element equals 9. Notes Prior to April 1970, ice pellets were coded as sleet. Beginning in April 1970, sleet and small hail were redefined as ice pellets and are coded as 0, 1, or 2. |
| 103 | PWX2 | XXXXX | Occurrence of Fog,
Blowing Dust, or Blowing Sand | 0 - 9 | 0 = Fog
1 = Ice fog 2 = Ground fog 3 = Blowing dust 4 = Blowing sand 5 = Heavy fog 6 = Glaze (beginning 1984) 7 = Heavy ice fog (beginning 1984) 8 = Heavy ground fog (beginning 1984) 9 = None if Observation Indicator element equals 0, else unknown or missing if Observation Indicator element equals 9. Notes These values recorded only when visibility is less than 11 km. |
| 104 | PWX2 | XXXXX | Occurrence of Smoke,
Haze, Smoke and Haze, Blowing Snow, Blowing Spray, or Dust | 0 - 7, 9 | 0 = Smoke
1 = Haze 2 = Smoke and haze 3 = Dust 4 = Blowing snow 5 = Blowing spray 6 = Dust storm (beginning 1984) 7 = Volcanic ash 9 = None if Observation Indicator element equals 0, else unknown or missing if Observation Indicator element equals 9. Notes These values recorded only when visibility is less than 11 km. |
| 105 | PWX2 | XXXXX | Occurrence of Ice
Pellets | 0 - 2, 9 | 0 = Light ice pellets
1 = Moderate ice pellets 2 = Heavy ice pellets 9 = None if Observation Indicator element equals 0, else unknown or missing if Observation Indicator element equals 9. |
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