Severe Weather in the Plains; Heavy Rainfall in the Ohio and Tennessee Valleys; Heat Wave in the Central U.S.

Numerous severe storms with a potential for severe wind gusts, tornadoes (some potentially strong), and very large hail are expected in parts of the central and northern Plains. Heavy rainfall may bring a flooding threat to parts of the northern Plains and from the Ohio Valley to the Southeast. Fire weather concerns persist in the Four Corners Region. Hot and humid expected in the central U.S.. Read More >

Table C2

Geographical Designator A1 A2

For bulletins containing ship weather reports and oceanographic data
including reports from automatic marine stations

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