The National Blend of Models (NBM) is a nationally consistent and skillful suite of calibrated forecast guidance based on a blend of both NWS and non-NWS numerical weather prediction model data and post-processed model guidance. The goal of the NBM is to create a highly accurate, skillful and consistent starting point for the gridded forecast.

The NBM text bulletins take data from the gridded NBM forecasts and generate data for weather stations from the closest usable grid point. Bulletins are available for over 9,000 land and marine stations in the CONUS, Alaska, Hawaii, Puerto Rico, Guam, and Oceanic-domains. Not all elements may be available for all stations.

Due to operational constraints, this site will only provide bulletins for Operational NBM text products for the following cycles: 01Z, 07Z, 13Z, 19Z. This page is not updated by the operational job stream, and the latest cycle time may not always reflect the most recent data available.

NBM Version 4.3, which is tentatively scheduled to be implemented in April of 2025, is a smaller-scale change package designed to fill an existing gap identified by the NWS Tropical Service Program. It will also address minor NBM issues to assist Public, Winter, Fire Weather, and Aviation NWS Services.

The National Blend of Models (NBM) is a nationally consistent and skillful suite of calibrated deterministic and probabilistic forecast guidance based on a blend of both NWS and non-NWS numerical weather prediction model data and post-processed model guidance.

Welcome to the National Blend of Models (NBM) dashboard. This serves as a summary of the various model inputs fed into each run of the NBM at a range of projections out to 11 days (264 hours) given date and cycle, region, and weather element.

2024年5月15日 · Use inventories as a guide when selecting parameters and levels from the NOMADS NBM grib filter

其中n为训练集中实例的总数，i为 指示函数 ，表示若括号中条件成立则取1，否则取0。比如训练集一共有100个实例，其中分类为a的实例有50个，则p(y=a)=50/100=1/2。

The NBM text bulletins take data from the gridded NBM forecasts and generate data for weather stations from the closest usable grid point. Bulletins are available for over 9,000 land and marine stations in the CONUS, Alaska, Hawaii, Puerto Rico, Guam, and Oceanic-domains.

2023年12月22日 · 最为广泛的两种分类模型是决策树模型(Decision Tree Model)和朴素贝叶斯模型（Naive Bayesian Model，NBM）。和决策树模型相比，朴素贝叶斯分类器(Naive Bayes Classifier 或 NBC)发源于古典数学理论，有着坚实的...