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Winter Weather Brings Dangerous Travel Conditions Across the Northern U.S.

Heavy lake effect snow will persist downwind of the Great Lakes through early Saturday. Snow squalls with heavy snow and gusty winds will create dangerous travel in the Interior Northeast due to low visibility and slippery roads. A major winter storm will bring moderate to heavy, accumulating snow and gusty winds from the eastern Plains to the western Great Lakes today through Saturday. Read More >

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Table D2 or D3

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Table D2 or D3

Data level designator ii

(when T1   =   D, G, H, P, Q, V, X or Y)

 

There are TWO tables defined for this designator.

T1   = D, G, H, P, Q, V, X, or Y

1. The WMO standard Table D2 as documented in Manual 386 PART II, Attachment II-5, and used for T1   = D, G, H, P, Q, V, X, or Y , which is used in most parts of the world for defining these products.

T1   = H, X, Y, and Z

2. The U.S. National Practice Table D3 which is used to extend the data level designation of ii definitions as defined in WMO manual 386 Table D2, and used for T1   = H, X, Y, and Z bulletins, used for most U.S. model products.