![Influence of global warming on U.S. heat waves may be felt first in the West and Great Lakes regions](/sites/default/files/Heat-Wave-Graph_Map_Combov1rotator.png)
Influence of global warming on U.S. heat waves may be felt first in the West and Great Lakes regions
Global warming will make heat waves hotter, longer, and more frequent. Communities in the U.S. West and the Great Lakes region may have the least time to prepare.
![It’s beginning to look a lot like winter, potentially](/sites/default/files/tempoutlook-8to14day-cpc--rotator--2017-12-04.png)
The most recent 8-14 day outlook for the United States predicts a turn towards wintry temperatures across the eastern United States, but much warmer than average temperatures in the West.
![History of the hottest summer day at thousands of U.S. locations](/sites/default/files/HottestSummerDays_dates_480.png)
Find the hottest summer day for thousands of U.S. stations with this interactive map.
![U.S. summer extremes: coldest and warmest first days of summer](/sites/default/files/FirstDayofSummer_coolestwarmest_480.png)
How do this year's temperatures on the first day of summer compare to historical highs and lows? Compare your local conditions to these maps showing the warmest and coldest first days of summer for more than 4,000 U.S. locations.
![NOAA-funded researcher Libby Barnes talks about the special challenges of forecasting in the gap between weather and climate](/sites/default/files/l_barnes_office_620.jpg)
Between the weekly forecast and a seasonal outlook—and often less accurate than both—sit “sub-seasonal” weather predictions. In this profile, atmospheric scientist Libby Barnes talks about her work leading a NOAA task force whose members are trying to overcome the special challenges of forecasting over the 2-week to 2-month horizon.