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Weather Observation Data Transfer
Format, 1998 (WxObs 98)
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Item
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Cols
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Type
|
Description
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1
|
01-03
|
3A
|
Record type (W98). All records
begin with this record type identifier code. |
|
2
|
04-09
|
6N
|
Station Number. |
|
3
|
10-17
|
8N
|
Observation date (YYYYMMDD). |
|
4
|
18-21
|
4N
|
Observation time (0000-2359). |
|
5
|
22
|
1A
|
Observation type (O=NFDRS,
R=RAWS other than at the standard NFDRS observation time, F=Forecast,
X=Other). |
|
6
|
23
|
1N
|
State of weather code. |
|
7
|
24-26
|
3N
|
Dry bulb temperature (degrees
Fahrenheit or degrees Celsius based on Measurement Type code [col. 63]). |
|
8
|
27-29
|
3N
|
Atmospheric moisture (wet bulb
temperature, relative humidity (percent), or dewpoint temperature based
on Moisture Type code [col. 62]). |
|
9
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30-32
|
3N
|
Wind direction azimuth
measured from true north. 0 (zero) means no wind direction, 360 is
north. |
|
10
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33-35
|
3N
|
Average windspeed over a
10-minute period (miles or kilometers per hour based on Measurement Type
code). |
|
11
|
36-37
|
2N
|
Measured 10-hour time lag fuel
moisture. |
|
12
|
38-40
|
3N
|
Maximum Temperature (degrees
Fahrenheit or degrees Celsius based on Measurement Type code [col. 63]). |
|
13
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41-43
|
3N
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Minimum Temperature (degrees
Fahrenheit or degrees Celsius based on Measurement Type code [col. 63]). |
|
14
|
44-46
|
3N
|
Maximum relative humidity
(percent). |
|
15
|
47-49
|
3N
|
Minimum relative humidity
(percent). |
|
16
|
50-51
|
2N
|
Precipitation duration
(hours). |
|
17
|
52-56
|
5N
|
Precipitation amount based on
Measurement Type code [col. 63]. Blanks=no precipitation. U.S.
measurement: inches with implied decimal nn.nnn format; trace shown
as 00005. Metric measurement: measured in millimeters, no implied
decimal; trace shown as 00001. |
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18
|
57
|
1A
|
Wet flag (Y/N). |
|
19
|
58-59
|
2N
|
Herbaceous greenness factor
(0-20). |
|
20
|
60-61
|
2N
|
Shrub greenness factor (0-20). |
|
21
|
62
|
1N
|
Moisture Type code (1=Wet
bulb, 2=Relative Humidity, 3=Dewpoint). |
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22
|
63
|
1N
|
Measurement Type code:
1=U.S.,2=Metric. Affects temperature (Fahrenheit or Celsius), wind
(miles or kilometers per hour), and precipitation (decimal inches or
millimeters). |
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23
|
64
|
1N
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Season code (1=Winter,
2=Spring, 3=Summer, 4=Fall). |
|
24
|
65-68
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4N
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Solar radiation (watts per
square meter). |