Operational Implementation
of Winter 2004 Meso Eta Change Package

What’s in this change package

Improving Precipitation Assimilation – Ying Lin

Bias Adjustment of Hourly Analyses for EDAS

Impact in 32km Parallels: Oct 6 – Dec 4 2003

Instantaneous solar fluxes 1-h later than observed in operational Eta (e.g., sunset)

Instantaneous solar fluxes corrected in parallel  Eta (e.g., sunset)

Instantaneous solar fluxes 1-h later than observed in operational Eta (e.g., sunrise)

Instantaneous solar fluxes corrected in parallel  Eta (e.g., sunrise)

Minor Bug Fix for Longwave … Fog

60-h Forecast Fields Valid 12Z 6 Nov 2003

Change in Input Precipitation
Type to Noah LSM

30-h Forecast from 00Z 5 February 2004

30-h Forecast from 00Z 5 February 2004

36-h Forecast from 00Z 5 February 2004

Impact of Lackmann change on Eta snow cover

Assimilation of GOES-12 radiances

PBL Mixing (S2)
Test coupling to Eta TKE Kh (m2/s)

Eta-12 Parallel (blue) vs Ops Eta (red) QPF Scores : 1/10/ – 2/18/04

48-h forecast RMS fits to CONUS raobs : 1/10 – 2/24/04

Changes to output product suite

Rime Factor (RF)

Rime Factor (left) & Percent Frozen Precipitation (right) from Eta microphysics

External Evaluation

TPC Evaluation

SPC Evaluation - part 1

SPC Evaluation – part 2

SPC Evaluation – part 3

AWC Evaluation

HPC Evaluation