NOUS41 KWBC 201230



Technical Implementation Notice 11-55

National Weather Service Headquarters Washington DC

730 AM EST Tue Dec 20 2011


To:       Subscribers

          -Family of Services

          -NOAA Weather Wire Service


          -Emergency Managers Weather Information Network

          Other NWS Partners, Users and Employees


From:     Jay Lawrimore      

          Chief, Climate Analysis Branch

          National Climatic Data Center


SUBJECT:  Soil Moisture and Soil Temperature Data Entering

          Hourly02 and Daily01 Products

          Effective January 31, 2012


Effective Tuesday, January 31, 2012, at approximately 1500 Coordinated Universal Time (UTC), The National Climatic Data Center will begin populating the soil moisture and soil temperature fields for U.S. Climate Reference Network (USCRN) stations in the hourly02 (CRNH02) and daily01 (CRND01) products. The U.S. Historical Climatology Network-Modernization (USHCN-M) station soil fields in these product columns will continue to report missing values since only USCRN stations make soil observations.


For both products the fields for average soil moisture at 5cm, 10cm, 20cm, 50cm, and 100cm will each remain 7 characters in length, and will present fractional volumetric water content to the nearest thousandth.  Soil moisture fields with missing data will have the number -99.000.


For both products, the fields for soil temperature will remain
7 characters long, presenting the soil temperature in degrees Celsius to the nearest tenth, with -9999.0 indicating a missing value.


The documentation for both products will also be revised so that the soil moisture column names and definitions will clearly indicate that the fields contain fractional volumetric water content.


If you have questions or feedback, please contact:


  Scott Embler

  National Climatic Data Center

  151 Patton Ave

  Asheville , NC   28803



NWS Technical Implementation Notices are online at: