As the summer heat intensifies, the National Weather Service San Diego cautions that today will likely be the warmest day of the week for most areas. With temperatures expected to climb above 110°F in the low deserts and approaching 100°F in the Inland Empire, the risk for heat-related illnesses remains a moderate threat, especially for those sensitive to heat and without access to effective cooling or hydration. For more details, check the NWS San Diego website.
The hot conditions are attributed to a strong subtropical ridge over the desert southwest. This ridge is forecasted to keep the lower deserts scorching, with highs above 110°F. Although slightly cooler temperatures are expected elsewhere tomorrow, the heat risk persists. Those planning to venture out into the deserts are advised to stay well hydrated and be cautious.
In an Area Forecast Discussion released by the National Weather Service, the subtropical ridge is reportedly shifting eastward, with the center over the Arizona/New Mexico border. As the ridge weakens and moves east, coastal and inland regions are expected to commence a slight cooldown tomorrow. Despite this, "the deserts will still be rather hot tomorrow and some increase of moisture from the south (with dewpoints in the 40s and 50s) is going to increase the heat index," indicating that conditions will remain intense for those areas. The full discussion can be found at the NWS San Diego website.
Heading into next weekend, the National Weather Service expects temperatures to stabilize right around or slightly below seasonal averages, as the longwave pattern becomes more zonal. While no hazardous marine conditions are expected through Thursday, weather spotters are encouraged to report significant weather conditions to Skywarn.
