1931-60 MONTHLY NORMALS

                             TD-9641


AREA COVERAGE: 3,656 stations, including 318 Weather Bureau first
order, in 50 states and USA territories and possessions.

PERIOD OF RECORD: Jan. 1931-Dec 1960 except standard deviations of mean 
monthly temperature.  Standard deviations are generally for the period
Jan. 1921-Dec. 1950 (exceptions: Alaska standard deviations are for
Jan. 1931-Dec. 1960).

OBSERVATION TIME: These monthly and annual normals are derived from 
individual year-month averages.


ELEMENT                                     WIDTH       COLUMNS

STATION NUMBER                                6         001-006
DIVISION                                      1         007-007
DATA CODE                                     1         008-008
NORMAL VALUE (JAN-DEC)                       48         009-056
ANNUAL VALUE                                  5         057-061
TYPE OF STATION                               1         062-062
BLANK                                         3         063-065


DIVISION REFERS TO A NUMBERING SYSTEM THAT IS DIFFERENT FROM THE CURRENT 
DIVISION IDENTIFICATION SYSTEM.  IT IS RECOMMENDED THAT THE NAME FILES FOR
THE LATER SETS OF NORMALS BE USED TO CROSS REFERENCE THE STATION NUMBER 
AND DIVISION IN THIS FILE.

TYPE OF STATION CODE: BLANK = SUBSTATION
                        -   = FIRST ORDER STATION

THE FIRST TWO DIGITS OF THE STATION NUMBER CAN BE DECODED FROM THE FILE
STDVREG.TXT FILE

DATA CODE:   1 = NORMAL MAXIMUM TEMPERATURE (DEGREES F AND TENTHS)
             2 = NORMAL MINIMUM TEMPERATURE (DEGREES F AND TENTHS)
             3 = NORMAL AVERAGE TEMPERATURE (DEGREES F AND TENTHS)
             4 = NORMAL HEATING DEGREE DAYS (BASE 65 F)
             5 = NORMAL PRECIPITATION AMOUNT (INCHES AND HUNDREDTHS)
             6 = STANDARD DEVIATION OF MONTHLY MEAN TEMPERATURES (DEGREES F
                 AND TENTHS)