List of sites for historical data (radar, observations, analysis, soundings, etc.)

Trade Stocks for Free with Robinhood
Leverage your knowledge of weather to beat the stock market with free trading on Robinhood! Sign up today, get free stock!

Rob H

Mar 11, 2009
Twin Cities, MN
If you've ever wanted to look at historical events, you've probably had some difficulty pulling together all the data you wanted. Here's a list of useful sites I've found - please post if you have any further suggestions!

NCDC Resources: - This page has links to the resources below, along with many others
Data: NEXRAD mosaic reflectivity
Data Format: Images
Range: 4/1/1995 - 2 days before present
Data: NEXRAD individual products for Level 2 and Level 3
Data Format: Multiple
Range: 1995 - present
Data: NEXRAD Level 3 full radar volumes
Data Format: Tarred and Gzipped by station and date/time
Times: Variable
Range: Variable, but typically mid-90s to 1 day behind the present
Note: This is the site you want to use for viewing archived data in GrLevel3, details can be found at
Data: NEXRAD Level 2 full radar volumes
Range: 1995 - present
Data: RUC, NAM, and GFS model runs
Data Format: .inv and .grb files
Data: Archived satellite images

HPC Resources:
Data: Surface analysis
Data Format: Images
Range: 4/2006 - present
Data: Surface analysis
Data Format: Text bulletins
Range: Last 2 weeks

SPC Resources:
Data: Tornado, hail, and wind events
Data Format: Images and CSV
Note: To go directly to a date, use and replace 'YYMMDD' with desired values
Data: Tornado, hail, and wind events
Data Format: CSV
Range: 1950-2009
Data: Sfc/925/850/700/500/300, wind speed/wind direction/temps/dew points
Data Format: Images
Times: 00z and 12z
Range: 11/30/98 - present
Data: Observed soundings
Data Format: Images
Times: Typically 00z and 12z, although special soundings will appear
Range: Last 7 days
Data: Multiple (radar mosaic, satellite, HPC surface analysis)
Data Format: Images
Range: 1/2000 - present
Note: To go directly to a date, use and replace 'YYMMDD' with desired values

Misc resources:
Data: Multiple types, but most importantly 1km satellite
Range: 1996 - present
Last edited by a moderator:
  • Like
Reactions: adlyons
Dec 9, 2003
The IEM has an EXCELLENT site to search past warnings (severe tstorm, tornado, and flash flood I think). Included are verification statistics, along with some nice miscellaneous stats such as one that reports how much of a polygon aligns with a county boundary. In addition, there are some radar images from the times of the warnings (and warning updates).

Iowa Environmental Mesonet - IEM COW ->

NASA also has a site on which one can view archived RUC soundings (2002, 2005-2010). See

Finally, Plymouth State has a nice archive system which allows you to create surface and upper-air maps from previous days (among many other things one can do). See
  • Like
Reactions: adlyons


Jun 24, 2012
SE Minnesota
This would be useful for looking up SPC events.

examples here:

replace YYYYMMDD with exact event date you want to look up.


Feb 17, 2014
Was the severe weather outbreak with those 5 tornadoes and 150 wind reports or so saved that just occurred on 2.21.14? I was specifically looking for radar in North Carolina.


Apr 24, 2012
Bourbonnais, Illinois

Lou Ruh

May 17, 2007
Initially, I was a little confused. I chose USA East and then I could not choose Pennsylvania as a state. If I choose USA instead of USA East, Pennsylvania is there. Pennsylvania should probably be included in USA East. New Jersey, Maryland, Delaware Connecticut, and Rhode Island should also be included there.