1. Northeast Regional Climate Center
xmACIS & NOWData
Keith Eggleston
Northeast Regional Climate Center
Cornell University

2. ACIS Update What is ACIS? NOWData and xmACIS updates
ACIS Web Services:
Issues related to NCDC’s GHCN-Daily

3. ACIS (Applied Climate Information System)
Developed by the Regional Climate Centers
Seamless integration, quality control and storage of traditional NOAA data sources with non-NOAA climate data.
Provides sector-specific and value-added data products.
Established robust and efficient infrastructure for providing climate information.

4. ACIS Datasets Station data
National Climatic Data Center (NCDC) GHCN-Daily
NCDC legacy datasets
National Weather Service local data holdings
NRCC Climate Record Books project
Other unique Regional Climate Center networks
Real-time data capture

5. ACIS Datasets Gridded data NRCC Interpolated NRCC Hi-Resolution
PRISM - Parameter-elevation Relationships on Independent Slopes Model
NARCCAP - North American Regional Climate Change Assessment Program

6. ACIS Interfaces xmACIS CLIMOD ThreadEx ACIS Maps Drought ACIS SC ACIS
NOWData
AgACIS
cli-MATE

7. Old NOWData

8. NOWData2

9. NOWData Update

10. NOWData Update

11. ACIS Interfaces NOWData xmACIS Simplified interface
Target: General public
xmACIS
Many configurable options
Target: NWS advanced users

12. xmACIS Product Updates

13. xmACIS Product Updates

14. xmACIS Product Updates

15. ACIS Product Updates

16. Seasonal Time Series

17. ACIS Gridded Data Product

18. ACIS Structure xmACIS interface NOWData interface Local App
Product Library
ACIS Web Services
ACIS Web Services
Data Server
ACIS Metadata
ACIS Database

19. ACIS Web Services Single station data access Multi-station analyses
State, county, drainage basin, bounding box
Station metadata
Gridded data
Available from most programming languages
JavaScript, Python, Perl, PHP

20. ACIS Partner Products
Visit for links and additional examples

21. ACIS Web Services

22. ACIS and GHCN-Daily Databases
ACIS Datasets and Priority
GHCN-Daily Sources and Priority
GHCN-Daily
NCDC DSI-3210
NCDC DSI-3200
NCDC DSI-3206
NCDC DSI-3299 (Keyed) *
NCDC DSI-3298 (CRB) *
NCDC DSI-3205 *
CF6
ASOS DSM
Shef #
* - Unique datasets
# - Mostly duplicated
Datzilla #
CRN and HCN-Modernized *
WBAN/ASOS ISD
Digitized from paper forms *
WxCoder
US Forts *
NCDC DSI-3211 (Old ASOS) *
Monthly ASOS METAR Extract *
CoCoRaHS *
HPRCC real-time data
NCDC DSI-9618 (GSOD) *
SNOTEL *
RAWS *
Various international sources *

23. GHCN-Daily Issues Occasional first-order data gaps
ACIS uses CF6 data for most recent 90 days

24. ACIS and GHCN-Daily Databases
ACIS Datasets and Priority
GHCN-Daily Sources and Priority
GHCN-Daily
NCDC DSI-3210
NCDC DSI-3200
NCDC DSI-3206
NCDC DSI-3299 (Keyed) *
NCDC DSI-3298 (CRB) *
NCDC DSI-3205 *
CF6
ASOS DSM
Shef #
* - Unique datasets
# - Mostly duplicated
Datzilla #
CRN and HCN-Modernized *
WBAN/ASOS ISD
Digitized from paper forms *
WxCoder
US Forts *
NCDC DSI-3211 (Old ASOS) *
Monthly ASOS METAR Extract *
CoCoRaHS *
HPRCC real-time data
NCDC DSI-9618 (GSOD) *
SNOTEL *
RAWS *
Various international sources *
CF6 (last 90 days) *

25. GHCN-Daily Issues Occasional first-order data gaps
Original vs. replacement values
Replacement values available in ACIS Dataset Comparison Tool

26. ACIS and GHCN-Daily Databases
ACIS Datasets and Priority
GHCN-Daily Sources and Priority
CF6 (last 90 days) *
GHCN-Daily
NCDC DSI-3210 (replacement values)
NCDC DSI-3200 (replacement values)
NCDC DSI-3206
NCDC DSI-3299 (Keyed) *
NCDC DSI-3298 (CRB) *
NCDC DSI-3205 *
CF6
ASOS DSM
Shef #
* - Unique datasets
# - Mostly duplicated
Datzilla #
CRN and HCN-Modernized *
NCDC DSI-3200 (original values only)
NCDC DSI-3210 (original values only)
WBAN/ASOS ISD
Digitized from paper forms *
WxCoder
US Forts *
NCDC DSI-3211 (Old ASOS) *
Monthly ASOS METAR Extract *
CoCoRaHS *
HPRCC real-time data
NCDC DSI-9618 (GSOD) *
SNOTEL *
RAWS *
Various international sources *

27. GHCN-Daily Issues Occasional first-order data gaps
Original vs. replacement values
Different QC algorithm

28. Database Comparison
Observation form
Datalogger report

29. GHCN-Daily Issues Occasional first-order data gaps
Original vs. replacement values
Different QC algorithm
ACIS Dataset Comparison Tool

30. GHCN-Daily Issues Occasional first-order data gaps
Original vs. replacement values
Different QC algorithm
QC of extremes
NWS assistance for ThreadEx stations

31. GHCN-Daily Issues

32. GHCN-Daily Issues Occasional first-order data gaps
Original vs. replacement values
Different QC algorithm
QC of extremes
Datzilla

33. GHCN-Daily Issues

34. GHCN-Daily Issues

35. Additional Information
ACIS documentation:
xmACIS:
Contact information: