Currently in Miami — June 29, 2023: Scattered showers and isolated thunderstorms amidst excessive heat; Aguaceros dispersos y tormentas eléctricas aisladas en medio de calor excesivo

The weather, currently.

More hot days are in store for South Florida on Thursday and through the weekend, with afternoon temperatures reaching the low-to-mid 90s and overnight lows in the upper 70s near the coast and the low 70s over the interior. Conditions could reach Heat Advisory criteria as heat indices reach the triple digits on Thursday, and could increase further towards 110 degrees later in the week. A slight increase in showers and thunderstorms is possible Thursday as moisture levels rise, which could help alleviate some of the heat. However, drier conditions are expected on Friday.

El tiempo, currently.

Se esperan más días calurosos para el sur de Florida el jueves y durante el fin de semana, con temperaturas vespertinas que alcanzarán los rangos bajo a medio de los 90 grados y mínimas nocturnas en el rango alto de los 70 cerca de la costa y el rango bajo de los 70 en el interior. Las condiciones podrían cumplir con los criterios de Advertencia de Calor ya que los índices de calor alcanzarán los tres dígitos el jueves y podrían aumentar aún más hacia los 110 grados para el fin de semana. Habrá un ligero aumento en los aguaceros y las tormentas eléctricas el jueves a medida que aumentan los niveles de humedad, lo que podría ayudar a aliviar algo del calor. El viernes se esperan condiciones más secas.

—John Morales

What you can do, currently.

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What you need to know, currently.

Astonishingly record-setting Atlantic Ocean temperatures have helped trigger a record-breaking melting of the Greenland ice sheet surface this week, new data show.

This week’s melt covered more than 50% of the Greenland ice sheet, only the third time that has ever happened since modern records have been kept, and the earliest-ever in the melt season. Above-freezing temperatures were recorded all the way to the top of the enormous ice sheet, more than 10,000 ft (3,300 m) above sea level. Temperatures reached 73°F (23°C) in far northern Greenland due to downsloping dry winds.

The Greenland melt was “certainly an extreme melt event highlighting the climate emergency,” according to Joel Gombiner, a polar scientist at the University of Washington. “The Greenland ice sheet completely melted last time CO2 was this high. The only question is how fast it disappears this time.”

Greenland is warmer now than at any time over at least the past 1,000 years. The melting of the Greenland ice sheet is directly linked to climate change caused by burning fossil fuels, and an acceleration of its melt is one of the tipping points expected if global warming exceeds the 1.5°C target agreed to in the Paris Climate Accord.

—Eric Holthaus