NOTE: The nws-changes mailing list is no longer active. The list archives are made available for historical reasons.
761 NOUS42 KWNO 140141 ADMNFD SPECIAL NCEP DISCUSSION CENTRAL OPERATIONS/NOAA/NWS/NCEP WASHINGTON DC 0130 UTC FRI NOV 14 2003 <snip> IMPORTANT NOTICE FYI...A NUMERICAL INSTABILITY ASSOCIATED WITH VERY HIGH WIND SPEEDS..GREATER THAN 120 M/S..FORCED BY ANOMALOUS STARATOSPHERIC EVENTS NEAR 45N IN THE NORTHERN ATLANTIC AND SMILAR CONDITIONS NEAR ASIA WAS THE CAUSE OF THE GLOBAL FORECAST SYSTEM..GFS..MODEL FAILURES AT 13/00Z AND 13/06Z. TO SOLVE THIS PROBLEM NCEP REDUCED THE TIME STEP IN THE FORECAST MODEL. THIS TIME STEP REDUCTION WILL TEMPORARILY CAUSE A 4 MIN. DELAY IN THE DELIVERY OF GFS PRODUCTS BEYOND 180HRS. THE GFS IMPLEMENTATION SCHEDULED FOR 11/18 HOWEVER WILL APPROXIMATELY RECOVER THIS DELAY IN THE GFS MODEL RUN TIME. ALSO...GOES 12/EAST SRSO IS SCHEDULED FROM 1343Z-1926Z ON FRI NOV 14TH FOR THORPEX RESEARCH. BUREK/SDM/NCO/NCEP NNNN ---------- End Forwarded Message ----------
nws-changes archives: