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SENIOR DUTY METEOROLOGIST NWS ADMINISTRATIVE MESSAGE
NWS NCEP CENTRAL OPERATIONS COLLEGE PARK MD
1139Z THU JUL 25 2013


DUE TO THE THREAT OF CWD NEXT WEEK FOR THE TROPICAL
SYSTEM IN THE ATLANTIC, NCEP/NCO WILL "GO LIVE" ON
THE NEW WCOSS SUPERCOMPUTERS TODAY, THURSDAY 7/25.

THE PRODUCTION SUITE ON WCOSS SYSTEM TIDE WILL BEGIN
SENDING OUT THE OFFICIAL OPERATIONAL PRODUCTS AT
ROUGHLY 1230Z. DATA DISSEMINATION FROM THE CURRENT
CCS SUPERCOMPUTER WILL CEASE AT THAT POINT, ALTHOUGH A
FEW MODELS WILL CONTINUE TO COME FROM THE CCS AS THEY
BLEED OFF OVER THE FIRST FEW HOURS AFTER THE SWITCH
TO WCOSS SYSTEM TIDE.

IN REFERENCE TO THE WCOSS GOING LIVE:

NCEP RECENTLY DISCOVERED THAT MODIFICATIONS MADE TO
THE WCOSS NAM LAND-SURFACE MODEL INADVERTENTLY CREATED
A NEAR-SURFACE COOL/MOIST BIAS OVER URBAN AREAS. THE
BIASES WILL BE MOST PRONOUNCED DURING HEAT WAVE/HIGH
HUMIDITY EVENTS AND ARE ISOLATED TO THE LARGEST
METROPOLITAN AREAS. A FIX FOR THE PROBLEM HAS BEEN
IDENTIFIED AND WILL BE IMPLEMENTED INTO THE NAM SOMETIME
IN THE NEXT 7-10 DAYS. SORRY FOR THE INCONVENIENCE..

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Game changer! 

Ignoring that all op GFS runs have been n the extreme Southern end of the 0Z ensemble members w/ 04L, and the NAM issues, no problems

 

NOUS42 KWNO 260332

ADMNFD

SENIOR DUTY METEOROLOGIST NWS ADMINISTRATIVE MESSAGE

NWS NCEP CENTRAL OPERATIONS COLLEGE PARK MD

0331Z FRI JUL 26 2013

DUE TO AN UNKNOWN TIDE SUPERCOMPUTER ISSUE..STILL UNDER

INVESTIGATIONS.. THE 00Z NAM FORECAST IS RUNNING ABOUT 1HR AND 35

MINUTES LATE BEYOND 36 HOURS...WE ARE RE-RUNNING SEVERAL FAILED

PROCESSES SINCE THE LAST NOTIFICATION WAS SENT OUT TO THE FIELD.

SYSTEM ADMINS ARE STANDING BY TO ASSIST IF FURTHER FAILURES

OCCUR.

 

 

000

NOUS42 KWNO 250254

ADMNFD

SENIOR DUTY METEOROLOGIST NWS ADMINISTRATIVE MESSAGE

NWS NCEP CENTRAL OPERATIONS COLLEGE PARK MD

0253Z THU JUL 25 2013

00Z GFS STARTED ON TIME..

IN REFERENCE TO THE WCOSS GOING LIVE DATE 7/25 1230Z

NCEP RECENTLY DISCOVERED THAT MODIFICATIONS MADE TO THE WCOSS NAM

LAND-SURFACE MODEL INADVERTENTLY CREATED A NEAR-SURFACE

COOL/MOIST BIAS OVER URBAN AREAS. THE BIASES WILL BE MOST

PRONOUNCED DURING HEAT WAVE/HIGH HUMIDITY EVENTS AND ARE ISOLATED

TO THE LARGEST METROPOLITAN AREAS. A FIX FOR THE PROBLEM HAS BEEN

IDENTIFIED AND WILL BE IMPLEMENTED INTO THE NAM SOMETIME IN THE

NEXT 7-10 DAYS.  SORRY FOR THE INCONVENIENCE..

SHRUELL/SDM/NCO/NCEP

 

THE 00Z GFS AND OTHER PRODUCTS ARE SO FAR NOT IMPACTED BY THIS

JOB FAILURE ON THE WCOSS SYSTEM TIDE.  WE APOLOGIZE FOR THE

INCONVENIENCE.

NEWBY/OREILLY/SDM/NCO/NCEP

 

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