The extremely dangerous heat wave continues across the East Coast and much of the South-Central U.S. today. Record high temperatures are expected for some areas especially across the Mid-Atlantic where extreme heat risk conditions reside. There is a Slight Risk (level 2 of 5) of severe thunderstorms today for the northern Mid-Atlantic into portions of southern New England. Read More >
Telecommunication Operations Center
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 |
US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
Telecommunication Operations Center
1325 East West Highway
Silver Spring, MD 20910
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