The entire southeastern quarter of the U.S. Cooling patches reach all the way to Louisiana, although the areas to the west and east of the Mississippi Valley have warmed considerably. The entire northern tier is cooler, but changes reach more than -2☏ in parts of the Dakotas. The maximum temperature normals are considerably lower in the north-central U.S. AprilĪpril is the most dynamic core month, and exhibits a variety of significant changes in maximum temperature and precipitation. Texas and Florida were also notably wetter during 1991–2020. This is especially true on the western and eastern edges of the cooler north-central zone, where precipitation increased by 10–25% in January. Outliers aside, this winter warming correlates with increased precipitation normals throughout much of the country, as warmer air can hold more water vapor during winter. The north-central region was a notable outlier that cooled by more than 1.0° F in some places, but generally follows annual cooling patterns. January temperatures have risen in the new normals by 0.5–1.5☏ across most of the country. The following examples illustrate the percent change in precipitation and the change in degrees Fahrenheit in maximum temperature for each core month. Core Month DifferencesĬhanges during the core months of each season (January, April, July, and October) can be representative of broader differences between different normals iterations. Atmospheric circulation dynamics and surface feedbacks result in substantial differences from month-to-month and region-to-region. are cooler in the spring, while much of the Southeast is now warmer in October, cooler in November, and warmer again in December. ![]() For example, the current normals for the north-central U.S. Monthly and seasonal changes are more dynamic. There are twenty years of overlap between the current normals and the previous iteration (1991–2010), which makes the annual changes between these two datasets somewhat muted compared to trends over the same period. The Southwest was considerably drier on an annual basis, while the central northern U.S. was wetter, from 1991–2020 than the previous normals period, 1981–2010. was warmer, and the eastern two-thirds of the contiguous U.S. Monthly gridded climate normals are available for the contiguous U.S., see the Gridded Normals tab for more information. Many other important economic decisions that are made beyond the predictive range of standard weather forecasts are either based on or influenced by climate normals. These data allow travelers to pack the right clothes, farmers to plant the best crop varieties, and utilities to plan for seasonal energy usage. Climate Normals are the latest in a series of decadal normals first produced in the 1950s. They were first released in May 2021 (v1.0.0), and the statistics for 23 of the sites were reissued in 2023 (v1.0.1). normals every 10 years in keeping with the needs of our user community and the requirements of the World Meteorological Organization (WMO) and National Weather Service (NWS). The official normals are calculated for a uniform 30 year period, and consist of annual/seasonal, monthly, daily, and hourly averages and statistics of temperature, precipitation, and other climatological variables from almost 15,000 U.S. Normals act both as a ruler to compare today’s weather and tomorrow’s forecast, and as a predictor of conditions in the near future. Climate Normals are a large suite of data products that provide information about typical climate conditions for thousands of locations across the United States. ![]() ![]() ![]() Rainfall totals are given for the past 7, 10, 14, 30, 60, and 90 days up to the current date, as well as the total for the current month, year, and previous year.The U.S. The Recent Rainfall table shows the total rainfall (in inches) for each Mesonet site. Add estimated values Mesonet Rainfall Totals (in inches)ĭata complete through 6:00 pm CST DecemStation Name
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