2023 Tide Tables Available - The 2023 tide tables are now available on our river forecast page. The Weather Prediction Center ( WPC ), located in College Park, Maryland, is one of nine service centers under the umbrella of the National Centers for Environmental Prediction (NCEP), a part of the National Weather Service (NWS), which in turn is part of the National Oceanic and Atmospheric Administration (NOAA) of the U. NCRFC Quantitative Precipitation Forecast (QPF). Jason Cordeira of Plymouth State University as a cooperative effort with CW3E using the NOAA/NCEP Weather Prediction Center (WPC) and the NOAA/NCEP Global Forecast System (GFS) Model. Five days of QPF are used in our analysis for the Significant River Flood Outlook. WPC 24-hour QPF. Products provided by the WPC include surface analyses, outlooks for heavy rain and snow, as well as guidance weather forecasts through five days. Note 2 About Product: Some snow water equivalent gages may be hidden at zoomed out levels of the map due to a large amount of data being represented. Within the WPC tropical program, the lead forecaster on shift, who prepares the day 1 QPF, is to provide the rainfall statement for tropical cyclones that are expected to make. Moved Permanently. PRISM-based downscaling is applied to the quantitative precipitation forecasts (QPF) from each model. This page contains 1, 3, 5, and 7-day Quantitative Precipitation Forecasts (QPF). These are raw model simulations that DO NOT take into account hydrologist expertise and quality control modifications. These outlooks can be found here. This statement is included in the Public Advisory issued by the NHC, and is a forecast of expected rainfall amounts that will occur with the tropical cyclone. Forecast Products QPFs: 24-Hourly 6-Hourly Days 4-5/6-7 5-Day Total Medium Range: Min Temps Max Temps Prob of Pcpn (PoP) WPC Grids Sea-level Pressure Verification for specific events: Hurricane Isaac QPF Hurricane Sandy QPF Quantitative Precipitation Forecasts How Threat Scores and Bias are Computed 24-Hourly QPFs. WPC QPF guidance is reviewed by HAS meteorologists at the CNRFC and modified when appropriate. 2023 Tide Tables Available - The 2023 tide tables are now available on our river forecast page. US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service. Preliminary Outlooks for Various QPF Durations : Contingency river forecasts are produced by running varying WPC QPF durations through the operational hydrologic model to anticipate potential future crests. QPF forecasts are issued several times daily by the Weather Prediction Center (WPC). Point Data Data updated: Instantaneous Temperatures. About the Day 4-5 and Day 6-7 QPFs. gov/downscaled_qpf_examples/ The Hurricane Sandy examples (sandy_) demonstrate results for a heavy precipitation event in the eastern continental. WPC’s Top Ensemble Requirements Need high-resolution guidance fully covering Days 2 and 3 Implies model guidance available through 84 hours Supports QPF, ERO, PQPF, and PWPF Improve under-dispersion of ensemble systems Currently post -processing is required to correct under -dispersive ensemble spread Supports PQPF and PWPF. Quantitative Precipitation Forecasts. Five days of QPF are used in our analysis for the Significant River Flood Outlook. Sea-level Pressure Verification for specific events: Hurricane Isaac QPF Hurricane Sandy QPF. NOUS41 KWBC 221945 AAA PNSWSH National Weather …. Note 2 About Product: Some snow water equivalent gages may be hidden at zoomed out levels of the map due to a large amount of data being represented. Ensemble Forecasts; Quick Briefing; 5-Day Significant Flood Outlook; Flash Flood Guidance; Puerto Rico River Observations; Forecast Hydrographs; Weather Observations and Forecasts. About WPCs PQPF and Percentile QPF Products. This site provides current rainfall, weather, stream and impoundment information for Maricopa County and nearby counties. NOAA/ National Weather Service. Products provided by the WPC include surface analyses,. NOUS41 KWBC 221945 AAA PNSWSH National Weather Service. National Weather Service. Forecast (QPF) discussion to a mixed-case text/expanded 95 American Standard Code for Information Interchange (ASCII) character set format. the National Weather Service (NWS) Weather Prediction Center (WPC) will modify the transmission deadlines for a subset of its quantitative precipitation forecast (QPF) product suite. WPC has developed graphical and gridded examples of 6-hour, 24-hour and 168-hour deterministic downscaled QPF available at: ftp://ftp. River Observations and Forecasts. WPCs Medium Range Hazards Forecast. WPC meteorologists serve as experts in quantitative precipitation forecasting and numerical model interpretation. WPC Daily QPF Maps (click to enlarge/step/loop) Data compiled from WPC 6h forecasts and updated daily using 1200 UTC initial times. gov > Southeast RFC > WPC 24-hour QPF. NWS WPC produces Quantitative Precipitation Forecasts (QPFs) that depict the amount of liquid precipitation expected to fall in a defined period of time. About WPCs Probabilistic and. 24-Hour Observed Precipitation Charts WPC QPF Archive. precip/wpc_qpf (MapServer) Quantitative Precipitation Forecasts (QPFs) for up to 7 days. October 17 - 26, 2021 Storm Summary - The CNRFC has published a comprehensive summary of the significant early season precipitation event affecting California and northern Nevada in October 2021. Probabilistic forecasts are computed based on a combination of WPCs 6-hour QPF and an ensemble of model forecasts. Medium Range: Min Temps Max Temps Prob of Pcpn (PoP) WPC Grids. This page contains 1, 3, 5, and 7-day Quantitative Precipitation Forecasts (QPF). NWS WPC produces Quantitative Precipitation Forecasts (QPFs) that depict the amount of liquid precipitation expected to fall in a defined period of time. In the case of snow or ice, QPF represents the amount of liquid that will. Effective July 9, 2013, the National Centers for Environmental Prediction’s (NCEP’s) Weather Prediction Center (WPC) will transition Day 6-7 Quantitative Precipitation Forecasts (QPFs) from an experimental to operational status. QPF 24 Hours Day 2 is for a 24 hours time period starting at the valid date/time for day 2 (which is 24 hours past day 1). Weather Prediction Center (WPC) Home Page Weather Prediction Center National Oceanic and Atmospheric Administration NCEP : · · EMC · · · OPC · SPC · · WPC WPCs Medium Range Hazards Forecast Winter Storm Severity Index Overview Surface Analysis Fronts QPF Excessive Rain Winter Wx Day 3-7 Forecast Tools National Forecast Chart Valid Fri May 5, 2023. How Threat Scores and Bias are Computed. Alternate Text Product: CNRFC Snow Water Equivalent Summary / CNRFC Snow Depth Summary. 24-Hour Max Ending 12Z (5 AM PDT) 24-Hour Min Ending 12Z (5 AM PDT). Not operationally supported 24/7. Weather Prediction Center (WPC) Home Page Weather Prediction Center National Oceanic and Atmospheric Administration NCEP : · · EMC · · · OPC · SPC · · WPC WPCs Medium Range Hazards Forecast Winter Storm Severity Index Overview Surface Analysis Fronts QPF Excessive Rain Winter Wx Day 3–7 Forecast Tools National Forecast Chart Valid Fri May 5, 2023. The QPF_6_Hour_Intervals provides 6-hour precipitation forecasts through Day 3. Effective Monday, February 26, 2018, at 1200 Coordinated Universal Time (UTC), the National Centers for Environmental Prediction (NCEP) Weather Prediction Center (WPC) will transition the Quantitative Precipitation Forecast (QPF) discussion to a mixed-case text/expanded 95 American Standard Code for Information Interchange (ASCII) character set …. FCDMC ALERT Google Data Display Map. All QPF rainfall values are FORECAST ESTIMATES in the event that storms develop. As a reminder, WPC issues Excessive Rainfall Outlooks in order to highlight where the potential is greatest for flash flooding. WPC Day 1 Excessive Rainfall Outlook. WPC Home Analyses and Forecasts National Forecast Charts National High & Low WPC Discussions Surface Analysis Days ½-2½ CONUS Days 3-7 CONUS Days 4-8 Alaska QPF PQPF Excessive Rainfall Mesoscale Precip Discussion Flood Outlook Winter Weather Storm Summaries Heat Index Tropical Products Daily Weather Map GIS. The 00-06 hr, 06-12 hr, 12-18 hr, and 18-24 hr files comprise the Day 1 forecast period, 24-30 hr, 30-36 hr, 36-48 hr, and 48-54 hr are Day 2, and the final 4 periods, 54-60 hr, 60-66 hr, 66-72 hr, and 72-78 hrare Day 3. Water Supply Climate and History Seasonal Interest Local Information NCRFC incorporates 24 hours of QPF during Spring & Summer, and 48 hours of QPF during Fall & Winter for NWS River Forecasts. 25 30 35 40 45 50 −120 −115 −110 −105 −100 −95 −90 −85 −80. Realization of the National QPF Master Blender: A Big Data. NWS Weather Prediction Center on Twitter: As a reminder, WPC. WPC Verification QPF Medium Range Model Diagnostics Event Reviews Weather Prediction Center 5830 University Research Court College Park, Maryland 20740. WPC has developed graphical and gridded examples of 6-hour, 24-hour and 168-hour deterministic downscaled QPF available at: ftp://ftp. NOUS41 KWBC 101420 PNSWSH Service Change Notice 13 …. Weather Prediction Center on Twitter: As a reminder, WPC >NWS Weather Prediction Center on Twitter: As a reminder, WPC. WPCs Medium Range Hazards Forecast. Day 1: Day 2: Day 3: Day 4: Day 5: Day 6: Day 7: Day 1-7 Loop:. The products are produced by Dr. Weather Prediction Center (WPC) Home Page>Weather Prediction Center (WPC) Home Page. QPF represents the total amount of liquid precipitation (in inches) expected during specific periods, The river forecast models at the CNRFC use 6-hour QPF/QPE. WPC QPF Maps Updated 1630 UTC 20230502. Effective Monday, February 26, 2018, at 1200 Coordinated Universal Time (UTC), the National Centers for Environmental Prediction (NCEP) Weather Prediction Center (WPC) will transition the Quantitative Precipitation Forecast (QPF) discussion to a mixed-case text/expanded 95 American Standard Code for Information Interchange (ASCII) character. The change is based on numerous requests and as part of continual product improvement. NOUS41 KWBC 101420 PNSWSH Service Change Notice 13. Precipitation Forecasts – Center for Western Weather and. Quantitative Precipitation Forecast (QPF). 25 30 35 40 45 50 −120 −115 −110 −105 −100 −95 −90 −85 −80. QPE, or Quantitative Precipitation Estimate, represents the total amount of liquid equivalent precipitation (in inches) that has been observed during the specified period at a point or basin. AR Portal: Precipitation Forecasts: AR Portal at NOAA. 72-Hourly Gridded QPF. There are three main reasons why the objective forecasting techniques show better scores than forecasters: (1) The traditional value of the forecaster is reflected in the correction of the systematic deviation of the model precipitation level forecast, but the objective QPF method can better replace this work. Water Supply Climate and History Seasonal Interest Additional Info The Northeast River Forecast Center produces river basin averaged Quantitative Precipitation Forecasts (QPF) for New England and much of New York State. Weather Prediction Center (WPC) Home Page. They may also be issued around 06Z during times of increased flood potential. WPC prototype QPF maps under development. Quantitative Precipitation Forecasts, or QPFs, depict the amount of liquid precipitation expected to fall in a defined period of time. In addition, WPC will discontinue the coded isohyet points which represent. QPF forecasts are routinely issued three times daily around 00Z, 12Z and 18Z. WPC QPF is also available in the following formats: GRIB 2 Shapefiles KML -- (viewable in Google Earth, Microsoft Virtual Earth, ArcGIS Explorer, and numerous other Geographic Information System (GIS) mapping applications) About These Products Precipitation Verification How accurate are WPC precipitation forecasts?. Acting Director, Weather Prediction Center. QPE, or Quantitative Precipitation Estimate, represents the total amount of liquid equivalent precipitation (in inches) that has been observed during the specified period at a point or basin. Weather Prediction Centers 24-hourly Quantitative Precipitation Forecasts. As a reminder, WPC issues Excessive Rainfall Outlooks in order to highlight where the potential is greatest for flash flooding. WPC Probabilistic Winter Precipitation Guidance>WPC Probabilistic Winter Precipitation Guidance. California Nevada River Forecast Center. WPC meteorologists serve as experts in quantitative precipitation forecasting and numerical model interpretation. 6-Day Gridded QPF. NOUS41 KWBC 241835 PNSWSH National Weather Service …. Effective Monday, February 26, 2018, at 1200 Coordinated Universal Time (UTC), the National Centers for Environmental Prediction (NCEP) Weather Prediction Center (WPC) will transition the Quantitative Precipitation Forecast (QPF) discussion to a mixed-case text/expanded 95 American Standard Code for Information Interchange (ASCII) character set …. WPC Quantitative Precipitation Forecasts. Effective July 9, 2013, the National Centers for Environmental Prediction’s (NCEP’s) Weather Prediction Center (WPC) will transition Day 6-7 Quantitative Precipitation Forecasts (QPFs) from an experimental to operational status. The downscaling uses monthly PRISM data. NOUS41 KWBC 311810 AAB PNSWSH Service Change …. Year-to-Date Performance Chart - 24-Hour PoP (January - May 2022) WPC improvement over MOS Brier score, including percentage of stations adjusted, for Days 3-7 PoP fcsts. WPC Verification QPF Medium Range Model Diagnostics Event Reviews Winter Weather: International Desks: Development and Training WPC HydroMet Testbed Weather Prediction Center 5830 University Research Court College Park, Maryland 20740 Weather Prediction Center Web Team: Disclaimer Credits. Jason Cordeira of Plymouth State University as a cooperative effort with CW3E using the NOAA/NCEP Weather Prediction Center (WPC) and the NOAA/NCEP Global Forecast System (GFS) Model. This page contains 1, 3, 5, and 7-day Quantitative Precipitation Forecasts (QPF). Forecast Products QPFs: 24-Hourly 6-Hourly Days 4-5/6-7 5-Day Total. In addition, WPC will discontinue the coded isohyet points which represent the vertices. Effective July 9, 2013, the National Centers for Environmental Prediction’s (NCEP’s) Weather Prediction Center (WPC) will transition Day 6-7 Quantitative Precipitation Forecasts (QPFs) from an experimental to operational status. WPC Probabilistic Winter Precipitation Guidance Search by city or zip code. wbc issues excessive rainfall discussion (qpf) at may 4, 4:15 am edt there is a marginal risk of excessive rainfall across the intermountain west and from the lower missouri valley and eastern portions of the southern plains to parts of the mid-sou 04 may 2023 08:16:28. NWS Weather Prediction Center on Twitter: As a reminder, WPC …. Effective Tuesday, April 13, 2017, the Integrated Dissemination Program- Geographic Information System (IDP -GIS) will be correcting non-functional Geographic Information System (GIS) service named wpc_qpf. These changes will support testing NWS internal procedural changes that align QPF production among our different offices. The WPC produces 6-hour quantitative precipitation forecasts (QPFs) for forecast projection days one through three at 6-hour intervals (72-hour duration). NWS WPC produces Quantitative Precipitation Forecasts (QPFs) that depict the amount of liquid precipitation expected to fall in a defined period of time. Monthly Performance Charts - 12-Hour PoP (December 2018 - December 2019) WPC Brier scores for days 3-7 12-Hour PoP forecasts. WPC Verification QPF Medium Range Model Diagnostics Event Reviews Weather Prediction Center 5830 University Research Court College Park, Maryland 20740. This page contains 1, 3, 5, and 7-day Quantitative Precipitation Forecasts (QPF) from the NCEP Weather Prediction Center ( WPC ), the NCEP Global Forecast System (GFS) Model, and the European Centre for Medium-Range Weather Forecasts (ECMWF) model. Percentile QPF Products. Prediction Center (WPC) will transition the Quantitative Precipitation Forecast (QPF) discussion to a mixed-case text/expanded 95 American Standard Code for Information Interchange (ASCII) character set format. Weather Prediction Centers 24-hourly Quantitative Precipitation Forecasts. The WPC QPF data are plotted on a ~5 km grid. 3310 El Camino Avenue, Room 227. In the case of snow or ice, QPF represents the amount of liquid that will be measured when the precipitation is melted. Mesoscale Precipitation Discussion 0228 NWS Weather Prediction Center College Park MD 1155 AM EDT Sat May 06 2023 Areas affectedsouthern Louisiana ConcerningHeavy rainfallFlash flooding possible Valid 061553Z - 062153Z SummaryA marginal/isolated flash flood risk should materialize today as storms form across the. The Weather Prediction Center ( WPC ), located in College Park, Maryland, is one of nine service centers under the umbrella of the National Centers for Environmental Prediction (NCEP), a part of the National Weather Service (NWS), which in turn is part of the National Oceanic and Atmospheric Administration (NOAA) of the U. Weather Prediction Center. gov/downscaled_qpf_examples/ The Hurricane Sandy examples (sandy_) demonstrate results for a heavy precipitation event in the eastern continental United States (CONUS). This page contains 1, 3, 5, and 7-day Quantitative Precipitation Forecasts (QPF) from the NCEP Weather Prediction Center ( WPC ), the NCEP Global Forecast System (GFS) Model, and the European Centre for Medium-Range Weather Forecasts (ECMWF) model. PDF NOUS41 KWBC 241835 PNSWSH National Weather Service Headquarters Silver. This page contains 1, 3, 5, and 7-day Quantitative Precipitation Forecasts (QPF). At each grid point, the precipitation type determination for the NCEP models is based on the dominant type algorithm ( Manikin, 2005 ). As a reminder, WPC issues Excessive Rainfall Outlooks in order to highlight where the potential is greatest for flash flooding. Forecasters at the National Weather Services Weather Prediction Center (WPC) and its predecessor organizations have been making Quantitative Precipitation Forecasts since 1960. Jason Cordeira of Plymouth State University as a cooperative effort with CW3E using the NOAA/NCEP. Quantitative Precipitation Forecasts, or QPFs, depict the amount of liquid precipitation expected to fall in a defined period of time. Weather Prediction Centers 24-hourly Quantitative Precipitation Forecasts. The Northeast River Forecast Center produces river basin averaged Quantitative Precipitation Forecasts (QPF) for New England and much of New York State. The Northeast River Forecast Center produces river basin averaged Quantitative Precipitation Forecasts (QPF) for New England and much of New York State. Ensemble Forecasts; Quick Briefing; 5-Day Significant. Precipitation Forecast (QPF)>NCRFC Quantitative Precipitation Forecast (QPF). Observed 24−hour Precipitation Valid 12Z May 05, 2023 Sources. California Nevada River Forecast Center. WPC Verification Statistics. Precipitation Forecasts: AR Portal at NOAA >AR Portal: Precipitation Forecasts: AR Portal at NOAA. Forecasters at NCRFC generate QPF around 6 am and 6 pm for Days 1 through 5 using guidance from NWS Weather Prediction Center (WPC), Weather forecast offices, and current weather models. WPC QPF is also available in the following formats: GRIB 2 Shapefiles KML -- (viewable in Google Earth, Microsoft Virtual Earth, ArcGIS Explorer, and numerous. WPC QPF is also available in the following formats: GRIB 2 Shapefiles KML -- (viewable in Google Earth, Microsoft Virtual Earth, ArcGIS Explorer, and numerous other Geographic Information System (GIS) mapping applications) About These Products Precipitation Verification How accurate are WPC precipitation forecasts?. NOUS41 KWBC 011910 National Weather Service Headquarters. NOUS41 KWBC 241835 PNSWSH National …. wbc issues excessive rainfall discussion (qpf) at may 4, 4:15 am edt there is a marginal risk of excessive rainfall across the intermountain west and from the lower missouri valley and eastern portions of the southern plains to parts of the mid-sou 04 may 2023 08:16:28. QPF 24 Hours Day 1 is for the 24 hour time period starting at the valid date/time. Day 1: Day 1-2: Day 1-3: Day 1-4: Day 1-5: Day 1-6: Day 1-7:. NWS_Forecasts_Guidance_Warnings/wpc_qpf (MapServer). Within the WPC tropical program, the lead forecaster on shift, who prepares the day 1 QPF, is to provide the rainfall statement for tropical cyclones that are expected to make landfall. Wpc QpfThe updated GIS service will not be time enabled but will be time aware service. WPC QPF is also available in the following formats: GRIB 2 Shapefiles KML -- (viewable in Google Earth, Microsoft Virtual Earth, ArcGIS Explorer, and numerous other Geographic Information System (GIS) mapping applications) About These Products Precipitation Verification How accurate are WPC precipitation forecasts?. Effective Monday, February 26, 2018, at 1200 Coordinated Universal Time (UTC), the National Centers for Environmental Prediction (NCEP) Weather Prediction Center. The following steps are used to prepare raw ensemble data for use by the PWPF process: PRISM-based downscaling is applied to the quantitative precipitation forecasts (QPF) from each model. NOUS41 KWBC 241835 PNSWSH National Weather Service. Forecast Precipitation. Subject: Day 6-7 Quantitative Precipitation Forecasts to Transition from Experimental to Operational Status on July 9, 2013. These data are updated every 5 minutes. WPC Daily QPF Maps (click to enlarge/step/loop) Data compiled from WPC 6h forecasts and updated daily using 1200 UTC initial times. Description: Forecasters at the WPC and its predecessor organizations have been making Quantitative Precipitation Forecasts since 1960. National Centers for Environmental Prediction’s (NCEP’s) Weather Prediction Center (WPC) will implement downscaling to five km resolution on all deterministic quantitative precipitation forecasts. precip/wpc_qpf (MapServer) Quantitative Precipitation Forecasts (QPFs) for up to 7 days. QPF 24 Hours Day 1 is for the 24 hour time period starting at the valid date/time. Effective July 9, 2013, the National Centers for Environmental Prediction’s (NCEP’s) Weather Prediction Center (WPC) will transition Day. WPC’s Top Ensemble Requirements Need high-resolution guidance fully covering Days 2 and 3 Implies model guidance available through 84 hours Supports QPF, ERO, PQPF, and PWPF Improve under-dispersion of ensemble systems Currently post -processing is required to correct under -dispersive ensemble spread Supports PQPF and PWPF. QPF forecasts are routinely issued three times daily around 00Z, 12Z and 18Z. Weather Prediction Center (WPC) Home Page Weather Prediction Center National Oceanic and Atmospheric Administration NCEP : · · EMC · · · OPC · SPC · · WPC WPCs Medium Range Hazards Forecast Winter. NWS Weather Prediction Center on Twitter: As a reminder, WPC issues. precip/wpc_qpf (MapServer). Observed 24−hour Precipitation Valid 12Z May 05, 2023 …. Weather Prediction Center (WPC) Home Page Weather Prediction Center National Oceanic and Atmospheric Administration NCEP : · · EMC · · · OPC · SPC · · WPC WPCs Medium Range Hazards Forecast Winter Storm Severity Index Overview Surface Analysis Fronts QPF Excessive Rain Winter Wx Day 3–7 Forecast Tools National Forecast Chart Valid Fri May 5, 2023. WPC Accumulating QPF Maps (click to enlarge/step/loop) Data compiled from WPC 6h forecasts and updated daily using 1200 UTC initial times. This study includes precipitation data, a discussion. Precipitation Forecasts – Center for Western Weather and >Precipitation Forecasts – Center for Western Weather and. WPC meteorologists serve as experts in quantitative precipitation forecasting and numerical model interpretation. Effective Monday, February 26, 2018, at 1200 Coordinated Universal Time (UTC), the National Centers for Environmental Prediction (NCEP) Weather Prediction Center (WPC) will transition the Quantitative Precipitation Forecast (QPF) discussion to a mixed-case text/expanded 95 American Standard Code for Information Interchange (ASCII) character set …. Zoom closer to view all relevant data in specific area of interest. iembot_wpc on Twitter: WBC issues Excessive Rainfall. gov > Southeast RFC > WPC 24-hour QPF. WPC prototype QPF maps under development. California Nevada River Forecast Center. WPC Daily QPF Maps (click to enlarge/step/loop) Data compiled from WPC 6h forecasts and updated daily using 1200 UTC initial times. wpc on Twitter: WBC issues Excessive Rainfall >iembot_wpc on Twitter: WBC issues Excessive Rainfall. WPC PWPF Member Viewer/Plumes. WPC QPF Maps Updated 1630 UTC 20230503. WPC Verification Forecast Products QPFs: 24-Hourly 6-Hourly Days 4-5/6-7 5-Day Total Medium Range: Min Temps Max Temps Prob of Pcpn (PoP) WPC Grids Sea-level Pressure Verification for specific events: Hurricane Isaac QPF Hurricane Sandy QPF Quantitative Precipitation Forecasts How Threat Scores and Bias are Computed 24-Hourly QPFs. WPC QPF Maps Updated 1630 UTC 20230502>WPC QPF Maps Updated 1630 UTC 20230502. WPC Probabilistic Winter Precipitation Guidance. the National Weather Service (NWS) Weather Prediction Center (WPC) will modify the transmission deadlines for a subset of its quantitative precipitation forecast (QPF) product suite.