Residents in several California counties are advised to brace for extended high temperatures as the National Weather Service (NWS) has issued a Heat Advisory effective until 9 PM tonight. The National Weather Service reports that areas impacted include the Santa Clara Valley, Eastern Santa Clara Hills, Southern Salinas Valley, and Interior Monterey and San Benito Counties. A gradual cooling trend will begin tomorrow, reducing the heat risk as the week progresses.
According to an Area Forecast Discussion, today's temperatures are projected to soar a few degrees higher than what was initially forecasted, prompting the extension of the Heat Advisory. The early morning temperatures were already 3-5 degrees up at lower elevations and approximately 10 degrees higher at the more elevated regions compared to this time yesterday. Such a warm outset is set to drive another sweltering day throughout the inland areas primarily. Thus, public safety officials will likely advise residents to stay hydrated and avoid unnecessary outdoor activity during peak heat hours.
The local aviation weather also reflects the region's thermal dynamics. Visual Flight Rules (VFR) conditions are currently reported, with no serious cloud cover that would generally contribute to stratus development. As the day matures, moderate onshore winds are anticipated to develop in the afternoon, coinciding with a higher probability of IFR stratus developing later tonight due to the influx of moisture from the southern areas. Due to increasing moisture, there is a 60% chance for an IFR ceiling on Thursday morning, as per the guidance provided by the NWS Aviation Weather.
Marine conditions mirror the windy scenario on land, as a stable northwestern breeze persists, with moderate to rough seas reported by the NWS. Mariners in the Pt Arena to Pt Reyes area, as well as from Pigeon Pt to Pt Pinos, are advised to adhere to Small Craft Advisories that are currently in place, indicating that caution should be exercised by those navigating the waters. The severity of marine conditions is expected to moderate slightly before picking up again over the weekend.
