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3-D Gridded NEXRAD WSR-88D Radar Data



GridRad Data Available for 2015 and 2016

28 March 2018, Author: Kenneth P. Bowman

Hourly GridRad analyses for the years 2015 and 2016 are now available from the NCAR Research Data Archive. Thanks to the RDA for their continuing support.

We hope to produce improved versions of the GridRad analysis and extend the analysis period forward and backward in time. Our best argument for continuing the GridRad analysis is to demonstrate its usefulness for research and teaching. So, if you use the GridRad data in your research or for other purposes, please drop us a line and let us know how you are using it. Publications that use GridRad data should cite it as requested on the NCAR RDA web page.

Click on the map to download a full-resolution PNG file (2401 x 1351 pixels)
This image is an example of a radar reflectivity map created using GridRad data.

GridRad Data Available for 2013 and 2014

16 October 2017, Author: Kenneth P. Bowman

Hourly GridRad analyses are now available for the years 2013 and 2014 from the NCAR Research Data Archive.

Thanks again to the RDA for hosting the archive!

Click on the map to download a full-resolution PNG file (2401 x 1351 pixels)
This image is an example of a radar reflectivity map created using GridRad data.

GridRad Data for Hurricane Harvey

28 September 2017, Author: Cameron R. Homeyer

We are pleased to annouce public availability of preliminary dual-polarization GridRad version 4.0 analyses for Hurricane Harvey. The analysis period extends from 25 August 2017 at 00:00 UTC to 31 August 2017 at 00:00 UTC and covers a relatively small region encompassing most of Arkansas, Louisiana, Mississippi, Oklahoma, and Texas. The data may be viewed by using the latest release of GridRadViewer (version 1.02).

Links to download daily TAR files and animated GIFs of column-maximum *Reflectivity* from GridRadViewer are provided below.

This image is an sample GridRad image from Harvey.

2018-02-02 UPDATE: These data are no longer available since they are not compatible with the latest version of GridRad_Viewer.

ANIMATIONS
25 AUGUST 2017
26 AUGUST 2017
27 AUGUST 2017
28 AUGUST 2017
29 AUGUST 2017
30 AUGUST 2017

GridRad Algorithm version 4.0 plans

28 September 2017, Authors: Cameron R. Homeyer and Kenneth P. Bowman

In the coming months we plan to produce high-frequency (5 minute) GridRad analyses for selected high-impact weather events using an improved algorithm, currently referred to as Version 4.0. Those analyses will be made available for download here and will provide:

Once the new algorithm has been thoroughly tested, and assuming continued funding, we plan to reprocess the entire archive from at least 2004 onward using the new algorithm. The comprehensive GridRad products will be placed in the NCAR Research Data Archive when they become available.

We expect that the basis of the GridRad algorithm (weighted interpolation) will remain essentially the same, but details of the algorithm and data products will change with time. Planned changes include:


GridRad Version 3.1 production status

28 September 2017, Author: Kenneth P. Bowman

We are in the process of extending the hourly GridRad analyses to include the period 2013 through 2016 using the Version 3.1 algorithm. The analyses for 2013 and 2014 are complete and have been sent to NCAR. We will post an update when they are available in the NCAR Research Data Archive. Analyses for 2015 and 2016 should be available within a few months.