Tornado Warnings are issued to enable the public to get out of harm’s way and mitigate preventable loss. NWS forecasters issue approximately 2,900 Tornado Warnings per year, primarily between the Rockies and Appalachian Mountains. Tornado Warning statistics are based on a comparison of warnings issued and weather spotter observations of tornadoes and/or storm damage surveys from Weather Forecast Offices in the United States.

Accuracy or probability of detection (POD) is the percentage of time a tornado actually occurred in an area that was covered by a tornado warning. The difference between the accuracy percentage figure and 100% represents the percentage of events occurring without warning.

Most tornadoes cannot be visually tracked from beginning to end and post-storm damage surveying is the official method with which the NWS categorizes tornado characteristics (intensity, path length & width) but must rely on radar data to estimate the timing of the tornado track.

Provides field, lab, and model studies to advance our understanding of atmospheric processes related to climate intervention that increases our instrumentation capabilities to conduct measurements of stratospheric gases and aerosols, improves our modeling and forecasting capabilities for stratospheric chemistry and dynamics, establishes a baseline state of stratospheric composition and transport for evaluating the current performance of atmospheric models, and as point of reference for any future changes, and improves our understanding of marine cloud properties and associated cloud-aerosol interactions in order

This measure shows the average number of days to complete an informal ESA Section 7 consultation. Federal agencies must consult with NOAA when any project or action might affect an ESA-listed marine species or a critical habitat. The process begins as informal consultation, but if it is determined that the action is likely to adversely affect a listed species and/or its critical habitat, the consultation must be formal. A large majority of consultations are handled informally.

Seaports with access to Physical Oceanographic Real-Time Systems (PORTS®) data move vessels and their cargo more safely and efficiently, and this measure tracks the number of top U.S. seaports that have access to PORTS® data. To create a list of the Nation’s top 175 seaports, NOS selected the top 152 ports by international tonnage, accounting for more than 99.9% of all direct imports and exports by tonnage in 2016. NOS added to this list 23 seaports that are critical to coastal military installations, the Nation’s energy supply, or commercial marine fisheries landings.

The Argo program is responsible for providing real-time data for the upper 2000m of ocean heat content globally and for important regions like the Tropical Pacific for detection of El Nino.

The measure is a proxy for the useful forecast lead time of the GFS beyond the current forecasts skill and is computed as a three-year moving average over the range of forecast days into the future. It is defined as the day (including fractional day) that the value drops below 0.6 in the deterministic GFS forecast. Dropping below 0.6 indicates the point at which a forecast loses useful skill. Extending lead time in prediction of future weather events allows people to make informed choices and enables protection of life, property, and enhancement of the National economy. Target is measured in days.

Reducing bias in OAR’s Earth System Model is an indicator of the improved skill of precipitation simulation. Bias is defined as the long-term mean (or average over time) difference between a simulated (model generated) value and the observed value. This performance measure will track the reduction in bias (e.g., percent reduction of the current FY21 bias) in U.S. seasonal precipitation simulations in OAR Earth System models based on a percentage of bias in past Earth System models.

This measure tracks Sea Grant’s success in assisting industry personnel with the adoption of responsible harvesting and processing techniques that improve social, economic, and ecological sustainability. Industry personnel include recreational, commercial (wild and cultured), and subsistence fishery participants, processors, and retailers. Practices include techniques, technologies and best management practices adopted. Fisheries sustainability and seafood safety refers to any combination of the ability of the ecosystem to remain diverse and productive; the social, cultural, and economic resilience of the fishing community; personal or crew safety; and quality and safety of the seafood product.

The public, private sectors, emergency managers, and government institutions at all levels in this country and abroad use NOAA tropical cyclone forecasts to make decisions regarding the protection of life and property. This goal measures the difference between the projected and actual location of the center of tropical cyclones in nautical miles (nm) for the Atlantic Basin, averaged over all the 48-hour forecasts occurring during the calendar year.

* Annual Hurricane Season begins June 1 and ends November 30. The final values are produced after a verification and validation period.

Because tropical cyclones are relatively rare events, this measure can show significant annual volatility. Projecting the long-term trend, and basing out-year goals on that trend, is preferred over making large upward or downward changes to the targets each year.

The AHHI provides an indicator of the overall amount of U.S. EEZ that is currently surveyed to an appropriate level of certainty to support safe navigation. The index is measured based on an internal model that assessed the degree of certainty needed for a a given area based on several factors – for instance, highly tracked and shallower areas need higher resolution surveys, and must be resurveyed more frequently to capture natural and human-caused changes (e.g., from storms, dredging, or maritime accidents). The index has a maximum score of 300; areas that are more important to maritime industry are weighted more heavily in the index.