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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 Apr 24, 2015 at 7:28 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 Apr 24 at 12Z

Latest 12Z 24 hour QPF starting Apr 24 at 12Z

Latest 12Z 48 hour QPF starting Apr 24 at 12Z

Latest 12Z 72 hour QPF starting Apr 24 at 12Z
1st 6 hour period from 12Z
(Apr 24 12Z-18Z)
2nd 6 hour period from 12Z
(Apr 24 18Z-00Z)
3rd 6 hour period from 12Z
(Apr 25 00Z-06Z)
4th 6 hour period from 12Z
(Apr 25 06Z-12Z)
00Z QPF Images Issued at
Tue Apr 21, 2015 at 8:19 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 Apr 22 at 00Z

Latest 00Z 24 hour QPF starting Apr 22 at 00Z

Latest 00Z 48 hour QPF starting Apr 22 at 00Z

Latest 00Z 72 hour QPF starting Apr 22 at 00Z
1st 6 hour period from 00Z
(Apr 22 00Z-06Z)
2nd 6 hour period from 00Z
(Apr 22 06Z-12Z)
3rd 6 hour period from 00Z
(Apr 22 12Z-18Z)
4th 6 hour period from 00Z
(Apr 22 18Z-00Z)
Non-Routine Issuances
06Z QPF Images Issued at
Sat Apr 25, 2015 at 1:34 AM
In the table below are links to the latest QPF graphics for the 06Z 24 hour creation time.
12 hour QPF is utilized for river forecasts

Latest 06Z 12 hour QPF starting Apr 25 at 06Z

Latest 06Z 24 hour QPF starting Apr 25 at 06Z

Latest 06Z 48 hour QPF starting Apr 25 at 06Z

Latest 06Z 72 hour QPF starting Apr 25 at 06Z
1st 6 hour period from 06Z
(Apr 25 06Z-12Z)
2nd 6 hour period from 06Z
(Apr 25 12Z-18Z)
3rd 6 hour period from 06Z
(Apr 25 18Z-00Z)
4th 6 hour period from 06Z
(Apr 26 00Z-06Z)
There has been no 18Z QPF issued at this time

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