**[RUC change package - 2008]{.underline}**

**Update -- 28 October 2007**

**Getbufr**

-   Add mesonet provider information for each mesonet report to output
    ASCII files for mesonet data (\*.mso).

-   Give priority to mesonet report that matches analysis valid time
    rather than use oldest report out of high-frequency mesonet data.

-   Read in TAMDAR data including TAMDAR aircraft moisture information

**RUC_rad-prep**

-   New program for reading in 3-d radar tiles to interpolate
    horizontally to RUC grid points, retaining radar AGL vertical levels
    at this point.

-   Should run at 5-10 min after hour. GSD version run on single
    processor, taking 10 min.

-   Additional script to run at separate time from
    /p40/naos-ruc/13km/scripts/run.13.nssl_refl

**Hybfront -- RUC analysis**

-   Use of mesonet data

    -   Use of mesonet winds for obs from approved station list (about
        4400 out of 12000 total stations).

        -   Mesonet station wind uselist based on reports with wind
            speed bias less than 1.0 m/s respective to RUC 1-h forecasts
            over a 10-day period.

    -   Individual otypes (variable for "observation type") for each
        mesonet provider, replacing previous single otype for all
        mesonet data.

    -   Revised mesonet provider list

-   Use of raobs

    -   Distinction between non-GPS and GPS rawinsondes for obs error
        and for O-B (obs-background difference) stats for monitoring

-   Radar reflectivity assimilation

    -   Assimilation of 3d radar reflectivity -- pre-processing of radar
        temperature tendency, moistening (increasing water vapor mixing
        ratio) where Z \> 5 dbZ

    -   Produces new tten_radar.out output file to be read in by hybcst
        where diabatic DFI with radar-based latent heat specification is
        applied.

-   Add CAP profiler data into RUC with new QC (O-B threshold) limits
    designed specifically for these observations.

-   Larger size of output NNT_dat files.

**Hybcst_pr -- RUC model preprocessor**

-   No changes

**hybcst -- RUC model**

-   Revised snow model (soilsnow.F)

    -   improved treatment for nighttime treatment over fresh snow --
        revision to snow density

-   Revised Grell-Devenyi convective scheme

    -   cap strength changed to decrease areal coverage for light
        convective precip -- 2-line change

    -   non-local specification of subsidence warming rather than at
        local grid point.

-   RRTM longwave radiation instead of Dudhia LW (lwrad.F)

    -   Improved nighttime temperatures, less nighttime 2m warm bias in
        warm-season, less excessive 2m cold bias over snow

-   Specification of observed latent heating from 3-d radar data
    (tten_radar.dat) in forward diabatic step of DFI.

-   Relaxed coordinate adjustment from

-   Remove print statements in DFI, saves \~1 min in run time.

-   Add output of 15-min precip fields to NNT_dat fields (for hourly
    output for use of 15-min convective precip for reflectivity fields).

**Hybpost**

-   add max reflectivity (max, 1km, 4km) to output

    -   based on combined resolved and sub-grid-scale components

        -   resolved - calrefl.f -- using appropriate NCAR-Thompson
            scheme Z-q relationships for rain, snow, graupel

        -   sub-grid-scale - uses 15-min convective precipitation field
            for convective component

    -   added to ruc_presm 2-d fields

    -   follows NAM reflectivity output fields

-   Added run-total accumulated precip and snow, also following similar
    fields in NAM output.

-   Modify ceiling calculation to avoid excessive LIFR (ceiling \< 500
    ft) conditions from vertical interpolation of cloud water/ice for
    ceiling calculation. Instead, for 6 levels closest to surface only,
    set ceiling as first level above surface at which cloud water
    exceeds cloud threshold value.

-   Added 2-d variable (RH-PW) for columnwise relative humidity with
    respect to precipitable water for a saturated column (e.g., PW /
    PW-sat). This field shows excellent continuity for a PW-derivative
    in flow across variable terrain elevation.

-   Update RTMA downscaling for RUC output to range of acceptable lapse
    rates to allow sharper inversions in fine-scale valleys when
    radiative cooling is likely dominant, allowing cold air pooling.

**Hybsubh** (GSD version only, for 15-min output)

-   Code modifications to add 15-min precipitation and reflectivity.

**Fslparms files**

-   **Grib.table**

    -   Add new variables for reflectivity variables (max, 1km, 4km) and
        for total accumulated precip (non-convective, convective).

-   Rawinsonde-GPS.dat (new)

-   Mesonet station wind use table (new)

**Script changes**

-   Run.13.hybfront,-- add REFLECT, RUC_REFL, TTEN_RADAR references

-   Run.13.hybcst -- add TTEN_RADAR reference

-   Run.13.hybpost -- size of input NNT_dat file is now larger

-   Run.13.subhout -- size of input 3d file is now larger.

All code

/home/rucdev/code/13km

All parms in

/home/rucdev/fslparms/13km