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 B7

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Table B7

Data Type designator T2

( when T1   =   Y or Z )


U.S. Table for National GRIB Products

U.S. National Practice

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 data types of the data contained within the text of the bulletin.

2. Where the data type does not correspond exactly with the designator, the designator for the most approximate type of the data may be used.

3. The NWS will assign deginators to this table in place of the unassigned designators when needed.

Designator
Data Type
A Cloud parameters (ice, water)
B Vertical wind shear
C Vorticity
D Probability values (thunderstorm, precip types, cloud types)
E Precipitation parameters (precip water, convective precip)
F Long wave radiation
G Temperature values (maximum, minimum, dew point)
H Height (geopotential)
I Unassigned
J Unassigned
K Ocean wave properties (period, direction)
L Unassigned
M Unassigned
N Unassigned
O Vertical velocity/surface lifted index
P Pressure
Q Stability index
R Relative humidity
S Snow properties
T Temperature
U Wind components (UV)
V Unassigned
W Cape/cin/helicity
X-Z Unassigned