Re: Fwd: NCEP model GRIB records may have errors

   John-

      you're welcome.   I think that what complicates the precip output
  from the RUC is that is that we have hourly output for that model.
  The GFS has 3-hourly, so they can have simpler precip fields.
  
                -Geoff


----- Original Message -----
From: John Caron <address@hidden>
Date: Wednesday, June 9, 2010 9:46 am
Subject: Re: Fwd: NCEP model GRIB records may have errors

> Hi Geoffrey:
> 
> Thanks much for your explanation. We have done a review on all of 
> the 
> models that we get over the IDD, and appears that this issue only 
> appears in the RUC2. We do see the "bucket dump" (we are calling it 
> "mixed intervals")  in a lot of models, for example in the GFS half-
> deg:
> ***Total_precipitation/Ground or water surface
>       all: (60)  0-3 0-6 6-9 6-12 12-15 12-18 18-21 18-24 24-27 24-
> 30 
> 30-33 30-36 36-39 36-42 42-45 42-48 48-51 48-54 54-57 54-60 60-63 
> 60-66 
> 66-69 66-72 72-75 72-78 78-81 78-84 84-87 84-90 90-93 90-96 96-99 
> 96-102 
> 102-105 102-108 108-111 108-114 114-117 114-120 120-123 120-126 126-
> 129 
> 126-132 132-135 132-138 138-141 138-144 144-147 144-150 150-153 150-
> 156 
> 156-159 156-162 162-165 162-168 168-171 168-174 174-177 174-180  Mixed
> 
> The issue appears in the RUC2 pressure output:
> 
> Open 
> 
Q:\cdmUnitTest\tds\new\RUC2_CONUS_20km_pressure_20100509_1300.grib2***Convective
_precipitation/Ground or water surface
>       all: (46)  0-0 0-1 0-2 1-2 0-3 2-3 0-4 3-4 3-5 4-5 0-5 0-6 5-
> 6 
> 3-6 6-7 0-7 0-8 7-8 6-8 0-9 8-9 6-9 0-10 9-10 0-11 10-11 9-11 11-12 
> 9-12 
> 0-12 12-13 0-13 12-14 13-14 0-14 14-15 12-15 0-15 15-16 0-16 16-17 
> 15-17 
> 0-17 0-18 17-18 15-18  Mixed
> 
> ***Large_scale_precipitation/Ground or water surface
>       all: (46)  0-0 0-1 1-2 0-2 2-3 0-3 3-4 0-4 3-5 4-5 0-5 0-6 5-
> 6 
> 3-6 6-7 0-7 7-8 0-8 6-8 8-9 6-9 0-9 9-10 0-10 10-11 9-11 0-11 9-12 
> 0-12 
> 11-12 12-13 0-13 12-14 0-14 13-14 12-15 0-15 14-15 15-16 0-16 15-17 
> 0-17 
> 16-17 17-18 0-18 15-18  Mixed
> 
> Now that we understand whats going on, we may just save the 1-hour 
> accumulations, since the others can be derived if needed. 
> Hopefully, 
> this will be less confusing to our users.
> 
> Thanks again to you and Patrick for your help!
>