National Weather Service United States Department of Commerce

Arctic Cold Front Impacting the Great Lakes into the Northeast

A powerful Arctic cold front will sweep across the Great Lakes today and into the Northeast early Thursday. Expect brief, intense bursts of heavy snowfall and gusty winds. Widespread strong winds will spread from the Northern Plains to the Great Lakes today and reach the Central Appalachians, Mid-Atlantic, and Northeast by Thursday, where some blizzard conditions are expected in the Appalachians. Read More >

Telecommunication Operations Center

National Program

Table B2

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Table B2

Data type designator T2

(when T1   =   D, G, H, X or Y)

Instructions for the proper application of the data type designator

1. The designator specified in this table should be used to the greatest extent possible to indicate the type of data contained within the text of the bulletin.

2. Where more than one type is contained in the text, the designator for one of the data types should be used.

3. When the table does not contain a suitable designator for the data type, an alphabetic designator which is not assigned in the table should be introduced and the WMO secretariat notified.

Designator Data Type
A Radar data
B Cloud
C Vorticity
D Thickness (relative topography)
E Precipitation
F Unassigned
G Divergence
H Height
I Unassigned
J Wave height + combinations
K Swell height + combinations
L Unassigned
M For national use
N Radiation
O Vertical velocity
P Pressure
Q Web bulb potential temperature
R Relative humidity
S Unassigned
T Temperature
U Eastward wind component
V Northward wind component
W Wind
X Unassigned
Y Unassigned
Z Unassigned