Walton-Smith Conductivity, Temperature, Depth (CTD) - WS0603 - WS0603_WS0603_028_5 - 2006-01-22 - 24.9005N 82.6177W. Hydrographic Measurements in the Gulf of Mexico. flags: 1 = good; 3 = mean ± 3*standard deviation; 4 = mean ± 5*standard deviation; 9 = missing

Walton-Smith Conductivity, Temperature, Depth (CTD) - WS0603 - WS0603_WS0603_029 - 2006-01-21 - 25.0627N 82.4792W. Hydrographic Measurements in the Gulf of Mexico. flags: 1 = good; 3 = mean ± 3*standard deviation; 4 = mean ± 5*standard deviation; 9 = missing

Walton-Smith Conductivity, Temperature, Depth (CTD) - WS0603 - WS0603_WS0603_029_5 - 2006-01-21 - 25.2262N 82.3502W. Hydrographic Measurements in the Gulf of Mexico. flags: 1 = good; 3 = mean ± 3*standard deviation; 4 = mean ± 5*standard deviation; 9 = missing

Oceanographic nowcasts and forecast guidance are scientific predictions about the present and future states of a water body (generally including water levels, currents, water temperature and salinity). These predictions rely on either observed data or forecasts from large-scale numerical models. A nowcast incorporates recent (and often near real-time) observed meteorological, oceanographic, and/or river flow rate data and/or analyzed (e.g. gridded) meteorological and oceanographic products.

NOAA's National Ocean Service (NOS) has developed a Lake Michigan and Huron Operational Forecast System (LMHOFS). LMHOFS is based on a three-dimensional ROMS model that runs on NOAA's High Performance Computers (HPC). LMHOFS provides water level, currents, water temperature and salinity nowcast and forecast guidance as well as interpolated winds from National Weather Service products. LMHOFS runs four times per day and generates 6-hour nowcasts and 48-hour forecast guidance.

The Cooperative Observer Program (COOP) 15-Minute Precipitation Data consists of quality controlled precipitation amounts, which are measurements of 15 minute accumulation of precipitation, including rain and snow for approximately 2,000 observing stations around the country, and several U.S. territories in the Caribbean and Pacific from the National Weather Service (NWS) Fischer-Porter Network. This new version of COOP HPD with faster automations due updated stations will result in faster access for the public.

In March 2015, data for thirteen Alaskan climate divisions were added to the NClimDiv data set. Data for the new Alaskan climate divisions begin in 1925 through the present and are included in all monthly updates. Alaskan climate data include the following elements for divisional and statewide coverage: average temperature, maximum temperature (highs), minimum temperature (lows), and precipitation. The Alaska NClimDiv data were created and updated using similar methodology as that for the CONUS, but with a different approach to establishing the underlying climatology.

Service Records and Retention System (SRRS) is historical digital data set DSI-9949, a collection of products created by the U.S. National Weather Service (NWS) and archived at the National Centers for Environmental Information (NCEI) [formerly National Climatic Data Center (NCDC)]. SRRS was a network of computers and associated hardware whose purpose was to transmit and store a large number of NWS products and make them available as needed.

U.S. Monthly Climate Normals (1971-2000) (DSI-9641C) include climatological normals based on monthly maximum, minimum, and mean temperature and monthly total precipitation records for each year in the 30-year period 1971-2000. DSI-9641G include climatological normals based on monthly and annual heating and cooling degree days. In order to be included in the normals, a station had to have at least 10 years of monthly temperature data or 10 years of monthly precipitation data for each month in the period 1971-2000.

The U.S. Daily Climate Normals (DSI-9641D) are based on monthly maximum, minimum, and mean temperature and monthly total precipitation records for each year in the 30-year period 1971-2000, inclusive (as well as separately computed monthly degree day totals). The monthly values are available in data set DSI-9641C or publication online (Climatography of the United States, No. 81 Monthly Station Normals of Temperature, Precipitation, and Heating and Cooling Degree Days, 1971-2000).