Surface Meteorological Observations, Overwater and Precipitation Data


Data Set


Period of Record

Surface Meteorological Data    

NCDC DS3505 Integrated Surface Data abbreviated as ISD, ISH, TD3505, DS3505 or DSI-3505 can be downloaded through the NCDC ftp site.

Once downloaded and uncompressed, the raw data files can be processed with SMERGE, creating SURF.DAT file, input to CALMET. The option JDAT = 6 should be used in SMERGE to indicate TD3505 data format of the raw data in the downloaded files. more » « less

The NCDC map viewer can also be used as a visualization tool to identify stations in a desired region. Based on the search criteria, a list of stations is displaced through this graphical web interface.

For more information about the DS3505 data set visit: TD3505 data is also available through this NCAR/UCAR link. It is possible that the user might have to register in order to get in.


1901 (for some stations)
– present

Automated Surface Observing System (ASOS):

More than 900 ASOS stations with sub-hourly data are available.


2000 – present

NCDC also provides Unedited Local Climatological Data (ULCD) at ~1,600 U.S. locations and Quality Controlled Local Climatological Data (QCLCD) at ~700 U.S. locations. Consists of hourly, daily, and monthly summaries.


1996 – 2004

2005 – present

For additional data options, visit Land-Based Datasets and Products at NCDC or Dataset Discovery at NCDC.


2000 - present

Overwater Data    

National Data Buoy Center (NDBC)

Global Varies with the buoy

National Oceanographic Data Center (NODC)

Global Varies with the buoy

For CALPUFF applications both the NDBC and NODC buoy data can be processed with the BUOY preprocessor.

Precipitation Data    

NCDC DS3240 Hourly Precipitation Data

U.S. 1940s – present

Hydrometeorological Automated Data System (HADS)


Graphical presentation of the short-term observed and climatic trends of precipitation: NOAA Advanced Hydrologic Prediction Service.


Precipitation data sets summarized by NCAR/UCAR