http://www.meted.ucar.edu/metedbb/posts/list/4.page JForum - http://www.jforum.net
However, NCEP was sending the new data accidentally before this date, as per this October 23 notice from NCEP:

"From 28 September through 22 October, NCO was inadvertently disseminating short-range ensemble forecast (SREF) mean, spread, and probability products to AWIPS from both the production and parallel runs. The two SREF runs were sent out at almost the same time. So for any given cycle, users may have been receiving products from either run, or even a combination of the two runs. The SREF products are now being sent exclusively from production to AWIPS."

Since the SREF changes have demonstrated forecast improvement, hopefully this oversight only helped to improve the forecasts of WFOs utilizing the SREF, although it may have made for some confusing inconsistencies if the old and new were mixed together in the output received.

NCEP lists the following as the changes, but note that new output fields and times are not distributed over NOAAport, instead the existing suite of output parameters and times will be distributed from the revised ensemble:
1) Upgrade WRF_NMM version and increase horizontal resolution from 40km to 32km
2) Upgrade WRF_ARW (aka WRF-EM) version and increase horizontal resolution from 45km to 35km
3) Upgrade RSM version and increase horizontal resolution from 45km to 32km
4) Replace a pair of Eta_sat members with WRF_nmm members
5) Replace a pair of Eta_det members with WRF_arw members
6) Replace a pair of RSM_ZhaoCloud with RSM_FerrierCloud
7) Upgrade BUFR code for WRF_ARW members
8) Adjust IC perturbations by using global Ensemble Transform perturbations for NMM and ARW members
9) Breakout the big BUFR output (with all 1376 stations all together) into individual station time-series
10) Increase output frequency from 3hrly to hourly for the 1st 39hr on grid212
11) Add aviation fields into ensemble products
12) Add wind variance into ensemble products
13) Add Richardson-Number based PBL height to the output products.
14) Add simulated radar Composite Reflectivity and echo top to the SREF output products.
15) Adjust all related aspects of the SREF system such as ensemble product generator and bias correction

Stephen]]> http://www.meted.ucar.edu/metedbb/posts/preList/80/232.page http://www.meted.ucar.edu/metedbb/posts/preList/80/232.page GMT