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Posted by Stan Benjamin on 5 Dec 97, 9:53 MT
RUC2 Field evaluation
Are you getting RUC2 fields yet?
Since the data stream has been late getting to the NWS participants can we extend the field evaluation until 26 December?
Can we hold a conference call on Monday 15 Dec at 10 AM MST to discuss issues? Please call Tom Schlatter or his secretary at 303-497-6938 if you wish to participate.
Here's how this would work: You call into a central number (to be provided) with a calling card number. You'll get billed for a call to Boulder (< 1 hour), and we'll handle the rest of the conference charges.
2. Outline for NWS evaluation of RUC2 output during field test
An outline for the actual evaluation was given in the RUC2 field test plan. (issued 22 May 97, available at
The primary comparison is to be with the current operational 60-km RUC1. Aviation Weather Center and Storm Prediction Center are each using their own evaluation forms. For NWS participants, we suggest a format that you can print out directly from:
It looks like this:
1 RUC2 much better than RUC1
2 RUC2 slightly better than RUC1
3 No discernible difference
4 RUC2 slightly worse than RUC1
5 RUC2 much worse than RUC1
250 mb winds
500 mb height
700 mb RH
850 mb temp
850 mb RH
3-h pressure change
(evaluation of both forecasts and analyses, including
60-km RUC hourly sfc analyses vs. those from 40km RUC2)
New fields not available in RUC1 that also would be good to look at:
(e.g., 700 mb)
General comments on both analyses and forecasts:
(These would be very helpful, especially in the following areas:)
behavior of specific phenomema
especially fronts, other surface wind shifts,
areas of heavy precipitation
case studies, including figures
We will use all of this information to build toward a subjective
We would like to have all forms and documentation of cases and any
Thanks again for your help with this effort.
Tom Schlatter and Stan Benjamin
p.s. Again, a reminder to use the RUC2 evaluation web site for
The FSL RAP/HRRR/RUC Information Forum is maintained with a variant of WebBBS .