Monday’s 1°Outside Insights: The Meteorology Behind Our Building Heat

The meteorology behind the forecast in today’s 1°Outside Insights focuses on a building “ridge” of high pressure – both at the surface, and the upper levels of the atmosphere, driving heat and humidity into New England. Matt looks at that, and one reason why isolated thunderstorms can develop on hot days, in the video!

Current Weather Patterns

High pressure is building off our coastline, creating a South-Southwest flow of wind that will carry us through the upcoming week. This pattern brings in the heat, building a ridge in the atmosphere. At around 20,000 feet, we see this ridge developing across the Carolinas, encouraging similar conditions at ground level. Today, a disturbance has caused a few showers across northern New England, with a slight chance of sprinkles or a quick shower from Boston to Worcester this afternoon.

Heat and Isolated Storms

As the week progresses, high pressure will dominate, but the heat and humidity will create isolated storm potential. This differential heating—variations in temperature due to terrain, vegetation, and urban areas—can cause storms to bubble up, particularly in mountainous regions. Here’s a look at the temperatures and storm potential for the week:

Tuesday:

• High temperatures: Mid-90s for many
• Late day sea breeze may cool coastal areas slightly.

Wednesday:

• High temperatures: 95°F to 100°F away from the coast, 90°F to 95°F at the coast (80°F on south-facing coasts like the Cape).
• Feels like temperatures: 100°F to 105°F due to increased humidity.
• Potential for isolated showers/storms, especially in mountainous regions.

Thursday:

• Continuation of high temperatures: 95°F to 100°F inland.
• Potential for a storm to pop up, especially by evening.

Friday:

• Increased chance of scattered showers and thunderstorms as the heat begins to break down.

Tips for Coping with the Heat

• Hydrate: Start drinking plenty of water today to help your body acclimate.
• Stay Cool: Mild nights with lows around 70°F won’t cool houses much. Try to find a cool place during the day, like a shopping mall or store, if you don’t have air conditioning.
• Watch for Storms: Use our app for notifications of any nearby storms, ensuring you’re prepared for sudden changes in weather.

Looking Ahead

By the weekend, a cold front is expected to come in, changing the air and breaking down the heat. We’ll keep you posted with updates on 1DegreeOutside.com, where you can find our detailed forecasts and weather insights.