Reading the High Resolution Coded Surface Bulletin
The high resolution coded surface bulletin describes the locations of high and low pressure centers, surface frontal systems, and surface troughs. For pressure centers the strength of the high or low is given in whole millibars and is followed by a string containing the latitude and longitude of the feature precise to the tenths of a degree. The first three digits indicate the latitude in degrees north, while the last four represent the longitude in degrees west. Fronts and troughs are described by a series of latitude and longitude points.
Here's an example (Decode this bulletin) :
The valid time of the analysis in the format MMDDHH where:
The Z at the end indicates that this is Zulu or UTC time.
HIGHS 1036 4391169 1037 4051079 1031 3850701...
Describes the strength and location of high pressure centers. The first value is the central pressure in millibars. The second value is the location of the feature in latitude and longitude precise to the tenths of a degree. In the example above,
LOWS 1018 4681013 1017 3420986 998 5040817...
Describes the strength and location of low pressure centers. In this example,
The remainder of the message provides the location of all fronts and troughs in latitude and longitude.
STNRY 2660729 2530763 2350807 2230836 2060863 1820877 1580880
This is a stationary front (STNRY) extending from 26.6N 72.9W through 25.3N 76.3W, 23.5N 80.7W, 22.3N 83.6W, 20.6N 86.3W, 18.2N 87.7W, ending at 15.8N 88.0W.TROF 3410986 3291003 3191023 3121044
This is a trough (or trof as labeled on the surface map) extending from 34.1N 98.6W through 32.9N 100.3W, 31.9N 102.3W, ending at 31.2N 104.4W.COLD 4440850 4290863 4160879 4030904 3980931 4050954 4180966
This is a cold front extending from 44.4N 85.0W through 42.9N 86.3W, 41.6N 87.9W, 40.3N 90.4W, 39.8N 93.1W, 40.5N 95.4W, ending at 41.8N 96.6W.OCFNT 5030817 4830826 4620838 4440850
This is an occluded front extending from 50.3N 81.7W through 48.3N 82.6W, 46.2N 83.8W, ending at 44.4N 85.0W.All possible frontal types are provided in the table below.