
An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >
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National Program
There are TWO tables defined for this designator.
T1 = H
1. The WMO standard Table C3 as documented in Manual 386 PART II, Attachment II-5, and used for T1 = H, which is used in most parts of the world for defining these products.
T1 = H, Y, and Z
2. The U.S. National Practice Table C8 which is used to extend the definitions as defined in WMO manual 386 Table C3, and used for T1 = H, Y, and Z bulletins, used for most U.S. model products.
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