U.S. Freeze Dates (DSI-9712)Entry ID: gov.noaa.ncdc.C00003
Abstract: Freeze Data is digital data set DSI-9712, archived at the National Climatic Data Center (NCDC) as two separate files/products: (1) Last Spring and First Fall Freeze Dates, 1931-60 (DSI-9712A) (2) Last Spring and First Fall Freeze Dates, 1951-80 (DSI-9712B). The major parameters that make up the Freeze Date file DSI-9712A are dates (year, month, day) of the last occurrence in Spring and the first ... occurrence in Fall where temperatures were less than or equal to 32, 28, 20, and 16 degrees Fahrenheit. The selection of freeze dates was performed for only those US states for which revisions were made to the publication "Climate of the States." As a result, only a subset of US states is represented in this data set. These include Arizona, California, Colorado, Delaware, Iowa, Maryland, Michigan, New Jersey, Oregon, Washington, and Alaska. Yearly values of the last Spring and first Fall occurrence of selected low temperatures were performed for the period 1931 through 1960. The major parameters that make up the Freeze Date file DSI-9712B are dates (year, month, day) of the last occurrence in Spring and the first occurrence in Fall where temperatures were less than or equal to 36, 32, 28, 20, and 16 degrees Fahrenheit. The selection of freeze dates was performed for 3,240 stations in the United States (including Alaska and Hawaii) for the 1951-1980 period. The stations were selected from the 1951-1980 Climate Normals station list (DSI-9641). The Spring and Fall distributions in this data set were then used to produce freeze dates and growing season lengths associated with specified probability levels (10, 20, 30, 40, 50, 60, 70, 80, 90 percent). Yearly station values of the last Spring and first Fall occurrence of selected low temperatures were chosen for the period 1951 through 1980. The low temperature thresholds were the values of 36, 32, 28, 24, 20, and 16 degrees Fahrenheit.
Purpose: To make a wide range of climatic data available to researchers and the public.
SUPPLEMENTAL INFORMATION: data set
CURRENTNESS REFERENCE: Ground Condition
Data Set Citation
Dataset Originator/Creator: National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Dataset Title: U.S. Freeze Dates (DSI-9712)
Dataset Release Date: Unknown
Data Presentation Form: tabular digital dataOnline Resource: http://www.ncdc.noaa.gov
Start Date: 1931-01-01Stop Date: 1980-12-31
Quality ATTRIBUTE ACCURACY REPORT: Not provided
LOGICAL CONSISTENCY REPORT: Unknown
COMPLETENESS REPORT: Completeness information not available.
PROCESS DESCRIPTION: Not derived from another source.
PROCESS DATE: Unknown
Access Constraints ACCESS CONSTRAINTS: None
DISTRIBUTION LIABILITY: Every effort has been made to ensure that these data are accurate and reliable within the limits of current NOAA quality control procedures. NOAA can only certify that the data provided to its customers is an authentic copy of the records which were accepted for inclusion in NOAA archives. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Use Constraints None
Data Set Progress
Role: DIF AUTHOR
Email: ncdc.orders at noaa.gov
151 Patton Avenue, Room 120
Province or State: NC
Postal Code: 28801-5001
Creation and Review Dates
DIF Creation Date: 2006-06-29
Last DIF Revision Date: 2011-07-21