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NCEP/EMC U.S. Stage IV imagery


This dataset contains the National Centers for Environmental Prediction (NCEP) Environmental Modeling Center (EMC) GIF Imagery including Hourly Stage II GIF, Daily Stage II GIF, Daily RFC GIF, 6-Hourly Stage IV GIF, and Daily Stage IV GIF. Depending on the time period selected, all GIF types may or may not be available. Please see the GCIP/EOP: Surface NCEP Ancillary Catalogue of Available GCIP Precipitation Data (NCEP/EMC). This dataset is provided as is and was not quality controlled by UCAR/JOSS. Beginning 1 Jan 2002, the analysis grid has been changed to conform with the official NWS HRAP grid. File names have also been changed. See the readme provided with this dataset for details. As of April 2017 this data includes Alaska and Puerto Rico stations.

Archive note

27 March 2020 - Data for 01 January 2020 was added when it was determined that this date had been omitted.

15 January 2020 - Data for 26 September 2019 was added when it was determined that this date had been omitted.

31 August 2020: Start and end dates/times on the files were updated.

7 October 2020: Stage 2 files will not be available after 28 July 2020.  

7 October 2020: As of 20 July 2020, file names changed from st4*.gif to st4_conus*.gif. Starting on 20 July 2020, if both files exist, please refer to the st4_conus*.gif file for the most complete data.

4 February 2021: Files missing from January 2002, April 2003, January 2012, and January 2020 were added.

Missing Data:
January 28 - 30, 2019 - some stage 4 data missing 
April 4, 2019 - all data missing
September 26, 2019 - all data missing
November 21, 2019 - some stage 2 missing
January 1, 2020 - all stage 4 and some stage 2 missing

Data access

  • ORDER data for delivery by FTP
  • Preview dataset (plots/images)

Additional information

Data Quality final
  • 1.0 (2011-08-11)
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Related projects
Spatial Type point
Frequency hourly
Language English
GCMD Science Keywords Expand keywords
Related links

Temporal coverage

Begin datetime 2001-12-31 12:00:01
End datetime 2024-04-30 23:00:00

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 71.413, Minimum (South) Latitude: 17.853
Minimum (West) Longitude: -176.836, Maximum (East) Longitude: -65.544

Primary point of contact information

Jun Du <>

Additional contact information


Du, J. 2011. NCEP/EMC U.S. Stage IV imagery. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 26 May 2024.

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Ancillary information

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