![April 2019 El Niño update: You are here](/sites/default/files/geopolar-ssta-monthly-nnvlRotator_480x320v3.png)
Weak El Nino continued into April. Our blogger discusses the "here & now" and the forecast for spring and summer.
![Winter outlook 2018-2019: How’d we do?](/sites/default/files/Temp_WinterOutlookPredictedObserved_2019_Rotator480x320.png)
How did the 2018-2019 Winter outlook do? Tom Di Liberto takes you through what happened in this week's ENSO blog.
![March 2019 El Niño Update: Think spring](/sites/default/files/ENSO_Wind_AnomaliesU850_Rotator480x320.png)
El Niño conditions continued into March. What do forecasters think is next?
![Hot and dry, warm and wet: Summer 2018 extremes in the U.S. Climate Reference Network](/sites/default/files/20180822-HURLaneB_480_0.jpg)
Many networks across the U.S. collect air temperature and precipitation observations we use to characterize these events. But only NCEI's U.S. Climate Reference Network (USCRN) was designed with lab-calibrated sensors--in triplicate--to ensure a high-quality, continuous record of U.S. climate.
![Warming winters across the United States](/sites/default/files/US_winter_temp_trends_480.jpg)
If the recent weather whiplash has left you wondering how U.S. winters are changing over time, NOAA climate maps tell the story.
![How tree rings tell time and climate history](/sites/default/files/treering_620.jpg)
Tree rings can reveal the age of wood used to make human artifacts from famous violins to the cliff ruins of Mesa Verde, and also tell us about the climate conditions that prevailed when those trees were alive.
![Exploring ENSO in Ecuador](/sites/default/files/ENSO_meeting_480_v2.jpg)
What is the latest and greatest in ENSO science? This blogger travels to Guayaquil, Ecuador to find out.
![Changes in ENSO impacts in a warming world](/sites/default/files/ENSO_Fire_Rotator480x320.png)
New research suggests the climate change could affect how ENSO impacts temperature and wildfires. Read on to learn what that means.
![September 2018 ENSO Update: back to school](/sites/default/files/OLR_August_2018_Rotator_480x320.png)
Forecasters are favoring the onset of El Niño conditions this fall. Our blogger gives you the details!
![State of the Climate in 2018: Meet the authors](/sites/default/files/sotc-2018-both-covers-480.png)
The climate system we share is big and complex. Assessments like the State of the Climate depend on expertise from around the world and around the sciences. This year's "Meet the Author" profile features two contributors to the African section of the "Regional Climates" chapter.