Valid: 10 UTC Tue 28 Mar 2023
  • About
  • Tutorial
  • RAP
  • NAM
  • GFS
Who are we?
TwisterData.com is developed and maintained by storm chasers and meteorologists David Demko and Donald Giuliano. Don and Dave share a deep passion for weather and meteorology, and began chasing storms together at the University of Oklahoma in 2000.
Why?
Sample Image As avid storm chasers and weather watchers, we make extensive use of internet weather data websites. Our goal was to create a website that gets out of the way of the user, allowing them to focus on the data. We hope we have succeeded and plan on continually improving and enhancing the website's user experience. To learn more about the website's features, please read through our brief tutorial.
Will you charge for data?
We have no plans to charge for basic weather model output data and graphics. Instead, we expect advertisements and sponsored video content to cover the cost of leasing the dedicated server used to generate this website. Some future content may require a subscription, such as personalized plots, archived data retrieval, or other value-added products. However, these are simply examples as we have no plans to implement these features at this time.
Future plans
The TwisterData.com website is currently programmed to display NCEP's RAP, NAM, and GFS models. Beyond that, future plans include adding additional functionality, running a custom WRF model, and expanding to include real-time observational data.
  • RAP Forecast Hour [10Z +00]
    Hours 0-21
    0001 02 03 04 05 06 07
    08 09 10 1112131415
    161718192021
  • Wind and Height
    •  
    • Wind, Isotachs, Height
    • 200 mb Wind, Isotachs, Height
    • 250 mb Wind, Isotachs, Height
    • 300 mb Wind, Isotachs, Height
    • 500 mb Wind, Isotachs, Height
    • 700 mb Wind, Isotachs, Height
    • 850 mb Wind, Isotachs, Height
    • 925 mb Wind, Isotachs, Height
    • Surface Wind, Isotachs, MSLP
  • Temperature
    •  
    • Air Temperature
    • 500 mb Temp, Wind, Height
    • 700 mb Temp, Wind, Height
    • 850 mb Temp, Wind, Height
    • 925 mb Temp, Wind, Height
    • Surface Temp, Wind, MSLP
    •  
    • Theta-E
    • 500 mb Theta-E, Wind, Height
    • 700 mb Theta-E, Wind, Height
    • 850 mb Theta-E, Wind, Height
    • 925 mb Theta-E, Wind, Height
    • Surface Theta-E, Wind, MSLP
  • Moisture
    •  
    • Dewpoint
    • 850 mb Dewpoint, Wind, Height
    • 925 mb Dewpoint, Wind, Height
    • Surface Dewpoint, Wind, MSLP
    •  
    • Mixing Ratio
    • 850 mb Mixing Ratio, Wind
    • 925 mb Mixing Ratio, Wind
    • Surface Mixing Ratio, Wind
    •  
    • Relative Humidity
    • 200 mb RH, Wind
    • 250 mb RH, Wind
    • 300 mb RH, Wind
    • 500 mb RH, Wind
    • 700 mb RH, Wind
    • 850 mb RH, Wind
    • 925 mb RH, Wind
    • Surface RH, Wind
    •  
    • Miscellaneous
    • Precipitable Water, MSLP
  • Vorticity and Vert. Vel.
    •  
    • Relative Vorticity
    • 500 mb Relative Vorticity
    •  
    • Vertical Velocity
    • 250 mb Vertical Velocity
    • 500 mb Vertical Velocity
    • 700 mb Vertical Velocity
    • 850 mb Vertical Velocity
    • 925 mb Vertical Velocity
  • Precipitation
    •  
    • Precipitation
    • Not available at analysis time
    •  
    • Simulated Radar
    • Composite Reflectivity
  • Instability
    •  
    • CAPE
    • CAPE (Max, 0-70mb AGL)
    •  
    • CIN
    • CIN (Max, 0-70mb AGL)
    •  
    • EHI
    • EHI (0-1km)
    • EHI (0-3km)
    •  
    • Miscellaneous
    • Surface LCL Height
    • Lifted Index, MSLP
  • Shear
    •  
    • Helicity
    • Helicity (0-1km)
    • Helicity (0-3km)
    •  
    • Bulk Shear
    • Sfc-500 mb Bulk Shear
    • Sfc-700 mb Bulk Shear
    • Sfc-850 mb Bulk Shear
    • Sfc-925 mb Bulk Shear
    •  
    • Crossover
    • Sfc-500 mb Crossover
    • 850-500 mb Crossover
    • 850-700 mb Crossover
  • Storm Motion
    •  
    • Storm Motion
    • Storm Motion
    •  
    • Storm-relative flow
    • 300 mb Storm-relative Wind
    • 500 mb Storm-relative Wind
    • 700 mb Storm-relative Wind
    • 850 mb Storm-relative Wind
    • 925 mb Storm-relative Wind
    • 10 m Storm-relative Inflow
  • Winter
    •  
    • Column Max Temp
    • Sfc-500 mb Max Temperature
    •  
    • Thickness
    • 1000-500 mb Thickness, MSLP
    • 1000-700 mb Thickness, MSLP
    • 1000-850 mb Thickness, MSLP
© 2008-2023 TwisterData.com | Developed by TwisterData.com | Privacy Policy