Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast across parts of the Upper Midwest into the Great Lakes, the Northeast, and the central High Plains. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Table D1

Level designator ii

(when T1 = O)

Instructions for the proper application of level designator.

1. The designator specified in this table should be used to the greatest extent possible to indicate the levels below the ocean surface in the body of the GRIB bulletin for oceanographic products.

2. When the table does not contain a suitable designator for the level, a designator which is not assigned in the table should be used.

Designator	Depth (in meters)
98	Surface
96	2.5
94	5.0
92	7.5
90	12.5
88	17.5
86	25.0
84	32.5
82	40.0
80	50.0
78	62.5
76	75.0
74	100
72	125
70	150
68	200
66	300
64	400
62	500
60	600
58	700
56	800
54	900
52	1000
50	1100
48	1200
46	1300
44	1400
42	1500
40	1750
38	2000
36	2500
34	3000
32	4000
30	5000
01	Primary layer depth