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Quantitative Precipitation Forecasts
Quantitative Precipitation Forecast, or QPF, is a prediction of precipitation amounts over an area. In this case, the area is that of the LMRFC. QPF is created for six hour increments for the next 72 hour periods at 12z and 00z and 54 hours at 18z and 06z. This is routinly done three times a day (00z, 12z, and 18z), but can be at 06z if the weather dictates . The resultant LMRFC QPF is then used as an input into the hydrologic model and river forecasts are issued based on QPF.
The LMRFC issues 72 hours of quantitative precipitation forecasts (QPF) throughout the year. For our routine river forecasts, only 12 hours of QPF is normally used. Under certain conditions and based on specific requests by our users, we will utilize 24 hours of QPF in them. A full 72 hours of QPF is used as input to our river models to produce local Significant River Flood Outlooks and National Significant River Flood Outlooks. Therefore, the daily Significant River Flood Outlook does not account for a full 5 days of QPF covering the LMRFC river forecast area.  

5-Day QPF for the United States can be found at http://www.hpc.ncep.noaa.gov/qpf/day1-5.shtml.

Routine Issuances
12Z QPF Images Issued at
Fri Dec 19, 2014 at 6:34 AM
In the table below are links to the latest QPF graphics for the 12Z 24 hour creation time.
12 hour QPF is utilized for river forecasts

Latest 12Z 12 hour QPF starting Dec 19 at 12Z

Latest 12Z 24 hour QPF starting Dec 19 at 12Z

Latest 12Z 48 hour QPF starting Dec 19 at 12Z

Latest 12Z 72 hour QPF starting Dec 19 at 12Z
1st 6 hour period from 12Z
(Dec 19 12Z-18Z)
2nd 6 hour period from 12Z
(Dec 19 18Z-00Z)
3rd 6 hour period from 12Z
(Dec 20 00Z-06Z)
4th 6 hour period from 12Z
(Dec 20 06Z-12Z)
00Z QPF Images Issued at
Thu Dec 18, 2014 at 6:22 PM
In the table below are links to the latest QPF graphics for the 00Z 24 hour creation time.
12 hour QPF is utilized for river forecasts

Latest 00Z 12 hour QPF starting Dec 19 at 00Z

Latest 00Z 24 hour QPF starting Dec 19 at 00Z

Latest 00Z 48 hour QPF starting Dec 19 at 00Z

Latest 00Z 72 hour QPF starting Dec 19 at 00Z
1st 6 hour period from 00Z
(Dec 19 00Z-06Z)
2nd 6 hour period from 00Z
(Dec 19 06Z-12Z)
3rd 6 hour period from 00Z
(Dec 19 12Z-18Z)
4th 6 hour period from 00Z
(Dec 19 18Z-00Z)
Non-Routine Issuances
There has been no 06Z QPF issued at this time
There has been no 18Z QPF issued at this time

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