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About
the 5-Day QPF and
Mean Temperature Forecasts
Issuance Times
| Product |
Time |
| Day 1-5 Total QPF (Daylight Time) |
1100/2300 UTC |
| Day 1-5 Total QPF (Standard Time) |
1200/0000 UTC |
| Day 1-5 Mean Temperatures |
0915 UTC |
| Day 3-7 Mean Temperatures |
1815 UTC |
About These Products
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The 5-day total quantitative precipitation forecast (QPF) is created by adding HPC's 6-hour QPFs for Days 1-3 (a total of 12 6-hour periods)
to a 48-hour forecast for Days 4-5 prepared by our medium-range forecasters. This forecast is
issued twice per day, once at 7:00 AM EDT/EST (11Z/12Z) and again at
7:00 PM EST/EDT (23Z/00Z).
Both forecasts are valid from the beginning of Day 1 through the end of Day 5, with the later issuance offset
by 12 hours. For example, a forecast prepared at 7:00 AM EDT/EST
September 2, 2004 would be valid for the 120 hour period from 12Z September 2, 2004 through 12Z September 7, 2004.
The forecast prepared at 7:00 PM EST/EDT September 2, 2004 would be valid from 00Z September 3, 2004 through 00Z September 8, 2004.
The day 1-5 mean minimum and maximum temperature forecasts are automated products that are based
entirely on the GFS Model Output Statistics (MOS) guidance.
The day 3-7 mean minimum and maximum temperature forecasts are created only using HPC
medium-range forecast guidance.
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www.weather.gov 
