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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 >

Telecommunication Operations Center

National Program

Table A

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TABLE A

Data Type Designator T1 Matrix Table
for
T2A1A2ii   definitions

T1 Data type     T2     A1 A2 ii     Priority Max Length
A Analyses     B1     C1 C1 **     3 15,000
B Service message     ***     *** *** ***     1/2/4* 15,000
C Climatic data     B1     C1 C1 **     4 15,000
D Grid point information (GRID)     B2     C3 C4 D2     3 15,000
E Satellite imagery     B5     C1 C1 **     3 (1)
F Forecast     B1     C1 C1 **     3 15,000
G Grid point information (GRID)     B2     C3 C4 D2     3 15,000
H Grid point information (GRIB)     B2     C3 C4 D2     3 15,000
I Binary observation - BUFR     B3     C6 C3 **     3 15,000
J forecast Information - BUFR     B3     C6 C4 D2     3 15,000
K CREX     C7     C7 C3 **     2 15,000
L --            
M --            
N Notices     B1     C1 C1 **     4 15,000
O Oceanographic (GRIB)     B4     C3 C4 D1     3 15,000
P Pictorial information(binary)     B6     C3 C4 D2     3 15,000
Q Pictorial information regional     B6     C3 C5 D2     3 (1)
R --            
S Surface data     B1     C1/C2 C1/C2 **     2/4* 15,000
T Satellite data     B1     C3 C4 **     2 15,000
U Upper-air data     B1     C1/C2 C1/C2 **     2 15,000
V National data     (3)     C1 C1 **     (2) (1)
W Warnings     B1     C1 C1 **     1 15,000
X GRID regional use     B2     C3 (2) D2     3 15,000
Y GRIB regional use     B2     C3 (3) D2     3 15,000
Z GRIB National use     (3)     (3) (3) (3)     3 15,000

* Priority level:

  • 1 is allocated to service messages 2 is allocated to data and request messages
  • 4 is allocated to seismologic data (T1T2 = SE) or administrative messages
** See Para.2.3.2.2 for definition and use
*** See Para.2.4.2.3 for definition and use
(1) Max size to 250K
(2) To be determined later date
(3) Table B2 or national table

DATA TYPES Y and Z uses National tables in some countries

U.S. National Practice Tables

      H uses C8 instead of C3
      Y & Z uses B7 instead of B2
      Y & Z uses C8 instead of C3
      Y & Z uses C9 for the T2 A1 fields to define a TILE number when the heading uses KWBZ
      Y & Z uses C10 for forecast hours
      Y & Z uses D3 instead of D2