Surface Observation Summary Info

These summaries are tabular lists of the decoded surface observations for the 24-hour UTC day selected.
The column labels are as follows:

ID   TIME   T  TD  RH DIR SPD GST ALT SLP VIS CIL  COV WX  MAX MIN  PR6 PR24 SC

where

	ID is the ICAO station identifier column

	TIME is the UTC time of the observation

	
T is the temperature in degrees Fahrenheit
TD is the dewpoint temperature in degrees Fahrenheit
RH is the relative humidity in %
DIR is the wind direction in degrees (referenced from true north) 90 would be a wind blowing from the east 180 would be a wind blowing from the south 270 would be a wind blowing from the west 360 would be a wind blowing from the north and so on ...
SPD is the wind speed in knots
GST is the gust speed (if reported) in knots
ALT is the abbreviated altimeter setting in inches of Hg if the first digit listed is 8 or 9, a leading 2 is missing if the first digit listed is 0 or 2, a leading 3 is missing Examples: 989 represents 29.89 in. Hg 032 represents 30.32 in. Hg
SLP is the abbreviated sea-level pressure in millibars (mb) if the first digit is 5 or greater, a leading 9 is missing if the first digit is less than 5, a leading 10 is missing Examples: 862 represents 986.2 mb 125 represents 1012.5 mb
VIS is the visibility in statute miles
CIL is the height of the lowest cloud base reported in hundreds of feet Examples: 8 represents 800 feet 35 represents 3,500 feet 210 represents 21,000 feet
COV is the cloud coverage X = obscured sky because of fog CLR or SKC = sky clear of clouds FEW = few clouds, but less than 2/8 cloud cover SCT = scattered cloud cover, 2/8 to 4/8 cloud cover BKN = broken cloud cover, 5/8 to 7/8 cloud cover OVC = overcast, 8/8 cloud cover
WX is the current weather Some of the most commonly reported weather conditions are: H = haze F = fog L = drizzle R = rain S = snow T = thunder IP = ice pellets B = blowing sea spray If any of the above is followed by a "-", it means light intensity If any of the above is followed by a "+", it means heavy intensity If neither a "-" or "+", it means moderate intensity
MAX is the maximum temperature (if reported) Maximum temperatures for the previous 24-hours are usually reported at 0000 UTC Other maximum temperatures would be over shorter intervals
MIN is the minimum temperature (if reported) Minimum temperatures for the previous 24-hours are usually reported at 1200 UTC Other minimum temperatures would be over shorter intervals
PR6 is the precipitation or liquid equivalent amount in inchesover the previous 6-hours
PR24 is the precipitation or liquid equivalent amount in inchesover the previous 24-hours
SC is the snow cover on the ground in inches (if reported) and usually reported at 1200 UTC