Skip Navigation Links weather.gov 
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
The Weather Prediction Center

 
 

 

Follow the Weather Prediction Center on Facebook Follow the Weather Prediction Center on Twitter
NCEP Quarterly Newsletter
WPC Home
Analyses and Forecasts
   National High & Low
   WPC Discussions
   Surface Analysis
   Days ½-2½ CONUS
   Days 3-7 CONUS
   Days 4-8 Alaska
   QPF
   PQPF
   Flood Outlook
   Winter Weather
   Storm Summaries
   Heat Index
   Air Quality
   Tropical Products
   Daily Weather Map
   GIS Products
Current Watches/
Warnings

Satellite and Radar Imagery
   Satellite Images
   National Radar
Product Archive
WPC Verification
   QPF
   Medium Range
   Model Diagnostics
   Event Reviews
International Desks
Development and Training
   Development
WPC Overview
   About the WPC
   Staff
   WPC History
   Accomplishments
   Other Sites
   FAQs
Meteorological Calculators
Contact Us
   About Our Site
 
USA.gov is the U.S. Government's official web portal to all federal, state, and local government web resources and services.

About the Short Range NDFD Graphics

The National Digital Forecast Database (NDFD) contains a mosaic of digital forecasts from the National Weather Service (NWS) field offices working in collaboration with NCEP. The forecasts depicted on the previous page — and in the example below — combine WPC forecasts of fronts, isobars and high/low pressure centers with the NDFD depiction of expected weather type.
 
Example of WPC/NDFD forecast
 
Below is a brief explanation of the depicted weather types.
 
  • NDFD Rain (30-60% Probability) - There is 30-60% chance of measurable rain (≥0.01") at the valid time.
  • NDFD Rain (> 60% Probability) - There is a greater than 60% chance of measurable rain (≥0.01") at the valid time.
  • NDFD Snow (30-60% Probability) - There is 30-60% chance of measurable snowfall (≥0.01") at the valid time.
  • NDFD Snow (> 60% Probability) - There is a greater than 60% chance of measurable snowfall (≥0.01") at the valid time.
  • NDFD Mix (30-60% Probability) - There is a 30-60% chance of measurable mixed precipitation (≥0.01") at the valid time.  "Mixed" can refer to precipitation where a combination of rain and snow, rain and sleet, or snow and sleet are forecast.
  • NDFD Mix (> 60% Probability) - There is a greater than 60% chance of measurable mixed precipitation (≥0.01") at the valid time.  "Mixed" can refer to precipitation where a combination of rain and snow, rain and sleet, or snow and sleet are forecast.
  • NDFD Ice (30-60% Probability) - There is a 30-60% chance of measurable freezing rain (≥0.01") at the valid time.
  • NDFD Ice (> 60% Probability) - There is a greater than 60% chance of measurable freezing rain (≥0.01") at the valid time.
  • NDFD T-Storm (30-60% Probability) - There is a 30-60% chance of thunderstorms at the valid time.   Areas are displayed with diagonal hatching enclosed in a dark red border.
  • NDFD T-Storm (> 60% Probability and/or Severe) - There is a greater than 60% chance of thunderstorms and/or the potential for some storms to reach severe levels.
You can view the full suite of NDFD products at the NWS's Graphical Forecast page.
 
Learn more about the NDFD.
 

NOAA/ National Weather Service
National Centers for Environmental Prediction
Weather Prediction Center
5830 University Research Court
College Park, Maryland 20740
Weather Prediction Center Web Team
Disclaimer
Credits
Glossary
Privacy Policy
About Us
Career Opportunities
Page last modified: Tuesday, 28-May-2013 11:58:01 UTC