Recurring Rossby Wave Train
(Consonant Chaos: Experimental. Projecting long range weather and short term climate based on the Recurring Rossby Wave Train)

This website's primary purpose is to be a home for the Recurring Rossby Wave Train forecast and analysis mappings offered by myself (Josh Herman) and various projects I am developing related to recurring atmospheric states. These mappings do not represent the forecasts of any government office. Please visit the US Dept of Commerce NOAA/NWS/NCEP Weather Prediction Center for official weather forecast and analysis information.

 Framework of the Recurring Rossby Wave Train; Establish numerical output of recurring atmospheric states. Further explore the interrelated nature of planetary and synoptic waves via statistical modeling. Reflect this temporal and spatial behavior of Intraseasonal Oscillation to weather patterns based on the empirical data.

I have been tracking recurring atmospheric states intimately since 2010. My past work is available. RRWT archived forecasts are available. For more detail concerning this study and a gateway for more research, please start with
Chaos Theory and Its Applications to the Atmosphere.

Contact Information
Please direct questions and comments to me via email at

Update Log
20170501 - New site. Under construction
20170510 - Added Forward Month and Season 2mT and PW
20170516 - Added page for BSR/SOI material (Renken; BSR / SOI)
20170601 - Remedied #wiwx Climatology indexing issue
20170730 - Changed #wiwx 2mT color scheme
20170731 - Added #wiwx season Snow forecast to PW page (17/18 initializes 10/1)
20170805 - Added BSR model code to GitHub -
20170829 - RRWT new analysis method forecast integration
20171006 - 2017/18 water year RRWT update fully integrated
20171017 - Added SOI model code to GitHub -
*Currently preparing the #wiwx precipitation projections

Josh Herman's expirement of the Recurring Rossby Wave Train ESRL style forecast mapping has not been declared operational and its data are preliminary and undergoing testing. Users receiving these data through any dissemination means assume all risk related to their use of RRWT data and Josh Herman disclaims any and all warranties, whether express or implied, including any implied warranties of merchantability or fitness for a particular purpose. 
Declared operational on 20171006

Disclaimer: Forecasts are performed on research basis. Please take your own risk using information posted here.

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2. in agreement or harmony with.
"these findings are consonant with recent research"
in agreement with, consistent with, in accordance with, in harmony with, compatible with, congruous with, in tune with;
complete disorder and confusion.
"snow caused chaos in the region"
disorder, disarray, disorganization, confusion, mayhem, bedlam, pandemonium, havoc, turmoil, tumult, commotion, disruption, upheaval, uproar, maelstrom;
- Projecting Long Range Weather and Short Term Climate -