A Few Notes about Hourly Rainfall

This data was copied from the NSRDB Synoptic Format--CDROM Format document.

Hourly Precipitation Flag:


Accumulated period and amount. An accumulated period
indicates that the precipitation amount is correct, but
the exact beginning and ending times are only known to
the extent that the precipitation occurred sometime
within the accumulation period. Begin accumulation data
value will always be 099999.

Deleted Flag. Beginning and ending of a deleted period.
A deleted value indicates that the original data were
received, but were unreadable or clearly recognized as

Missing Flag. (Beginning and ending of a missing
Period.) A missing flag indicates that the data were
not received. This flag appears on the first and last
day of each month for which data were not received or
not processed by NCDC. Prior to 1984 a missing period
was recorded as " 00000M" at the beginning and ending
hours. If precipitation occurred during the last hour
of the missing period, the second M appears with a non-
zero value. Beginning in 1984 the beginning and ending
hours of the missing period are recorded as "099999M".

Blank. No Flag needed.


Traverse City MI
Massena NY
Bradford PA
Washington-Dulles VA
Mason City IA
Minot ND
Pierre SD
Lufkin TX
Eau Claire WI
Tucumcari NM
Cedar City IA
Daggett CA
Arcata CA
Redmond OR
North Bend OR
Gulkana AK
Big Delta AK
Talkeetna AK
Bettles AK
Barrow AK
Bethel AK
Kotzebue AK
Kahului HI

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