Standardized
Anomalies for North America
The analysis and forecast animations shown here are computed using the
12-hourly pressure-level data from the operational 1.0 deg NCEP GFS out
to 180-h. This page will update twice daily (at 00 and 12 Z), approximately 6 hours
after the forecast time (e.g., the 00Z run available near 06Z). The
standardized anomalies are computed using a long-term (1979-2009)
21-day running mean centered on the time of analysis (Hart and Grumm
2001). The long-term climatology is derived from the 2.5 deg NCEP-NCAR
Reanalysis. This page was originally created covering the North Atlantic basin for use during the field phase of the PREDICT field campaign (summer/fall 2010), but will continue to be updated now covering North America and the extreme eastern (western) North Pacific (Atlantic).
1000-hPa height, temperature, and wind anomalies [a+f] [current forecast only]
850-hPa height, temperature, and wind anomalies [a+f] [current forecast only]
700-hPa height, temperature, and wind anomalies [a+f] [current forecast only]
500-hPa height, temperature, and wind anomalies [a+f] [current forecast only]
200-hPa height, temperature, and wind anomalies [a+f] [current forecast only]
Precipitable water, sea-level pressure, and anomalies [a+f] [current forecast only]
*"a+f" represents the 20-day analysis archive and current 180-h
forecast
References:
Hart, R. E., and R. H. Grumm, 2001: Using normalized climatological
anomalies to rank synoptic-scale events objectively. Mon. Wea. Rev., 129, 2426–2442.
Jason Cordeira (Univ. at Albany/SUNY) computed the 21-day running mean gridded data.
Questions? Email Tom Galarneau.