MCS 20090615-2009061606

MCS 20090615-2009061606

1. Introduction

• Where?

Observed reflectivity at 3km from 2006061518- 2006061618

2. Experiment design

Case name GSI DFICloud analysis First pass

Default valueSecond pass¼ of default value

Moist variable which applied dfi

Novar No gsi Wrf office version dfi, with dfi_radar=0

Conv stratiform Conv(all) none Applied DFI to Qv only, other mosit variable like Qs, Qc, Qr, Qg, Qi are remain unchanged andTemperature tendency added gradually (Current RUC version)

Ref stratiform Conv(all)+ rad_refCloud analysis followed by 3dvar

none The same above

Ref+Vel stratiform Conv(all)+ rad_refCloud analysis followed by 3dvar

Conv(uv+spd)+rwOnly 3dvar analysis

The same above

NODFI(only 15UTC available)

stratiform The same above The same above No dfi

GDWGND stratiform Conv(all) Radar reflective and radial velocity but in this time, GSI are not followed with GSI step1 but after wrf dfi. Then run gsi and wrf without dfi

Fisrt step with DFI and second without DFI

CV(Ref+Vel) convective The same above The same above Applied DFI to Qv only, other mosit variable like Qs, Qc, Qr, Qg, Qi are remain unchanged andTemperature tendency added gradually (Current RUC version)

VC convective Conv(all)+ rad_ref+rwOnly 3dvar analysis

Conv(all)+ rad_ref+rwOnly cloud analysis

The same above

All_init convective Conv(all)+ rad_refCloud analysis followed by 3dvar

Conv(uv+spd)+rwOnly 3dvar analysis

Applied DFI to all the moist variable and added Temperature at one time at the initial status of forward step (Current RUC version but with dfi_radar = 0)

IAU ConvectiveWith moist variable tendency added

Conv(all)+ rad_refCloud analysis followed by 3dvar

Conv(uv+spd)+rwOnly 3dvar analysis

Applied DFI to all the moist variable , Temperature tendency added gradually and also other moist variable tendency added gradually (like Current RUC version with dfi_radar = 0 but added moist variable tendency modified by Yi)

3. incremental

2009061606 radar reflectivity at 3km

Wind field incremental of GSI ---conventional data plus radar reflectivity

Wind field incremental of GSI ---radar radial velocity

Surface variable incremental-- conventional data plus radar reflectivity

Surface variable incremental-- radar radial velocity

Moisture field incremental

4. Forecast result

12 hour accumulated rainfall—from1518-1606

12 hour accumulated rainfall—from1518-1606

Moist field vertical slice

5. verification

Verification domain--130 Regional (CONUS) Lambert Conformal grid 13 km

061515

I hour accumulated rainfall verification—different data

Stratiform VS Convective

Different procedure

12 hour accumulated rainfall verification

Next plan

• Ran with high resolution

• Change the cloud classification