Heat Continues for the East and South-Central U.S.; Strong to Severe Storms Across the Mid-Atlantic and Northeast

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 >

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