Major Hurricane Erin is tracking just north of the lower Bahamas today. Dangerous surf and rip current threats increase this week for most of the Atlantic coastline. Erin's outerbands may impact the Outer Banks later this week. Hot to extremely hot temperatures are forecast today and Tuesday from a part of the southern Plains into the central to lower Mississippi River Valley. Read More >
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Instructions for the proper application of the reference time designator
1. The designator specified in this table should be used to the greatest extent possible to indicate the reference time of data contained within the text of the bulletin.
2. When the table does not contain a suitable designator for the reference time, use "Z" and obtain the forecast hour from the GRIB Product Definition Section.
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A | Analysis (00 hour) | N | 18 hours forecast |
B | 1 hour forecast | O | 24 hours forecast |
C | 2 hours forecast | P | 30 hours forecast |
D | 3 hours forecasts | Q | 36 hours forecast |
E | 4 hours forecast | R | 42 hours forecast |
F | 5 hours forecast | S | 48 hours forecast (2 days) |
G | 6 hours forecast | T | 60 hours forecast |
H | 7 hours forecast | U | 72 hours forecast (3 days) |
I | 8 hours forecast | V | 84 hours forecast |
J | 9 hours forecast | W | 96 hours forecast (4 days) |
K | 10 hours forecast | X | 108 days forecast |
L | 11 hours forecast | Y | 120 hours forecast (5 days) |
M | 12 hours forecast | Z | Time contained in PDS |
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National Weather Service
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