Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Brèves → Brèves 2021 → Records Fall in Extreme Early Summer Heatwave

Records Fall in Extreme Early Summer Heatwave

SciTechDaily (JUNE 17, 2021 )

Titre : Records Fall in Extreme Early Summer Heatwave

Extreme heat has descended on the southwestern United States, with several states enduring temperatures near and above record highs for June.

SciTechDaily (JUNE 17, 2021 )

Présentation
Extreme heat has descended on the southwestern United States this week, with several states enduring temperatures near and above record highs for June. As temperatures have surged, the region is also dealing with drought and scattered wildfires.

The map above shows air temperatures across the continental U.S. during the afternoon on June 15, 2021. The map was derived from the Goddard Earth Observing System (GEOS) model and depicts air temperatures at 2 meters (about 6.5 feet) above the ground. The darkest red areas are where the model shows temperatures around 49°C (120°F).

The GEOS model, like all weather and climate models, uses mathematical equations that represent physical processes (such as precipitation and cloud processes) to calculate what the atmosphere will do. Actual measurements of physical properties, like temperature, moisture, and winds, are routinely folded into the model to keep the simulation as close to observed reality as possible.

Local ground stations reported record-breaking temperatures. On June 15, the high temperature in Salt Lake City (42°C/107°F) tied the city’s all-time high for any day of the year. Record highs for June 15 were set in Needles, California (49°C/121°F), and Kingman, Arizona (44°C/111°F). High but not quite record-breaking temperatures were recorded in Las Vegas (46°C/114°F), Bishop, California (41°C/106°F), and Death Valley (51°C/124°F).

In Arizona, the high temperature in Phoenix (46°C/115°F) tied the record for June 15, falling short of the record-breaking 117°F forecasted for that day. According to news reports, forecasts were complicated by a blanket of smoke from wildfires burning in the state. In cloudless skies, airborne smoke generally leads to cooling below.

Source  : JUNE 17, 2021

Annonce (SciTechDaily)

Page publiée le 25 juin 2021