19990513: changes to Eta

> SPECIAL NCEP DISCUSSION
> CENTRAL OPERATIONS/NCEP/NWS/WASHINGTON DC
> 1320Z UTC THURSDAY MAY 13 1999
> 
> 131320Z...THE 12Z NCEP MODEL CYCLE IS OFF AND RUNNING..
> THE ETA STARTED 2-MINUTES AHEAD OF SCHEDULE AT 1313Z..
> GOOD COVERAGE OF 12Z UPA DATA OVER NORTH AMERICA..RAOB
> RECAP..CHH..OTX..FFC..MID/76644..ACA/76805..KCR/78384
> WERE ALL NOT AVAILABLE..WE DID NOT GET A REPORT FROM
> OUN SO PLS SEND IT IN IF AVAILABLE..ALSO COULD CHH
> PLEASE SEND IN THEIR 101-CODE GROUP REPORT..TOP WAS
> SHORT TO 638MB LEVEL..AND ILN WAS SHORT TO 500MB LEVEL..
> SIL DELETED LOW/HGTS AND COLD/TEMPS 150MB AND UP..
> WAL DELETED HIGH/HGTS 100MB AND UP..END..
> 
> ON OTHER MATTERS..EFFECTIVE AT 1200 UTC 13 MAY THE
> 3-D VARIATIONAL (3DVAR) ANALYSIS USED IN THE OPERATIONAL
> ETA MODEL RUNS..00Z..03Z..12Z AND 18Z..AND USED IN THE ETA
> DATA ASSIMILATION SYSTEM..EDAS..WAS CHANGED TO CORRECT
> PARAMETERS INFLUENCING THE BALANCE BETWEEN THE ANALYZED
> MASS AND WIND FIELDS..SO ALL USERS..THIS CHANGES WILL
> BE IN EFFECT BEGINNING WITH THE CURRENT ETA RUN..FOR
> FURTHER DETAILS ON THIS CHANGE CAN BE FOUND AT THE
> FOLLOWING WEB-ADDRESS:..ALL LOWER CASE..
> 
>     HTTP://WWW.NWS.NOAA.GOV/OM/TPB/3D-ETA.HTM
> 
> ALSO..OSO WILL BE GOING DOWN AT 1420Z TO DO A SYSTEM SWITCH
> THIS SHOULD TAKE BETWEEN 10-15-MINUTES..END..
> 
> 
> 
> SMITH/SDM/NCO/NCEP