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Level designator ii
(when T1 = H, X, Y, or Z)
Instructions for the proper application of level (elevations above the earth's surface) designator.
1. The designator specified in this table should be used to the greatest extent possible to indicate the level of the data contained within the text of the bulletin.
2. When data at more than one level are contained in the text, the designator for only one of the levels should be used.
3. When the table does not contain a suitable designator for the level, a designator which is not assigned in the table should be used.
The U.S. Practice uses 25 mb increments 1000-100 mb and are included below.
US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
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Silver Spring, MD 20910
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