Slow moving showers and thunderstorms may result in flash flooding for portions of the mid-Atlantic region today into tonight. Meanwhile, excessive heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue for the interior Northwest with dry and breezy conditions. Watching the tropics across the Southeast. Read More >
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National Program
Instructions for the proper application of the data type designator
1. The first letter A1 will denote the nature of the ship or automatic marine station:
For ocean weather stations: W
For mobile ships and other marine stations: V
2. The second letter A2 will denote the area from which the reports contained in the bulletin originate:
Designator | Data Area |
A | Area between 30° N - 60° S, 035° W - 070° E |
B | Area between 90° N - 05° N, 070° E - 180° E |
C | Area between 05° N - 60° S, 120° W - 035° W |
D | Area between 90° N - 05° N, 180° W - 035° W |
E | Area between 05° N - 60° S, 070° E - 120° W |
F | Area between 90° N - 30° N, 035° W - 070° E |
J | Area between 60° S |
X | More than one area |
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National Weather Service
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