Based NCEP/NCAR 40 years reanalysis (Jan. 1 1959 - Dec. 31th 1998)

Daily mean - Fits the first four Fourier modes to daily data

Stdv - computes a smooth standard deviation from annual cycle

anomaly forecast (%) - 0-normal forecast, 20->20% above normal

at pressure levels

near surface

VAR
Z1000
Z700
Z500
Z250
T850
T500
T250
U850
V850
U500
V500
U250
V250
PRMSL
T2M
TMAX
TMIN
U10M
V10M
Jan. 15th
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Jul. 15th
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Time series
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Fit data
No
No
Yes
No
No
Yes
No
No
No
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
.vs Running mean
No
No
Yes
No
No
No
No
No
No
No
No
No
No
No
Yes
No
No
Yes
No
Anomaly fcst
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes