Cooler temperatures expected later this week throughout county

LYNNWOOD, Wash., July 31, 2022 – The National Weather Service has issued an excessive heat warning that ends 9 p.m. Sunday, July 31 for Snohomish County. Residents can expect cooler temperatures Tuesday with a high of 72°F. Daily temperatures are expected to fluctuate between 55°F to 81°F.

Upcoming Weather Forecast (July 31 to Aug 6) for Snohomish County

• Sunday (July 31): Sunny, with a high near 81. Calm wind becoming west northwest 5 to 9 mph in the morning.
• Sunday Night: Mostly clear, with a low around 62. West northwest wind 5 to 9 mph becoming light and variable after midnight.
• Monday (Aug 1): Mostly sunny, with a high near 78. Calm wind becoming northwest 5 to 8 mph in the afternoon.
• Monday Night: Partly cloudy, with a low around 60. West northwest wind 5 to 11 mph becoming east in the evening.
• Tuesday (Aug 2): Mostly sunny, with a high near 72
• Tuesday Night: Partly cloudy, with a low around 58.
• Wednesday (Aug 3): A slight chance of rain. Partly sunny, with a high near 70.
• Wednesday Night: A chance of rain, mainly after 11pm. Mostly cloudy, with a low around 57.
• Thursday (Aug 4): A chance of rain, mainly before 11am. Mostly cloudy, with a high near 65.
• Thursday Night: A slight chance of rain. Mostly cloudy, with a low around 55.
• Friday (Aug 5): Mostly sunny, with a high near 70.
• Friday Night: Mostly clear, with a low around 55.
• Saturday (Aug 6): Sunny, with a high near 74.

Heat warning vs. watch vs. advisory

Excessive heat poses a significant risk to people’s health, including heat stroke and heat exhaustion, which can result in death. Excessive heat generally means unusually hot temperatures, possibly combined with oppressive humidity, that persists for two or more days.

An Excessive Heat Watch is typically issued two to five days ahead of possible dangerous heat conditions. Certainty regarding the development and timing of the event is lower than a warning.

An Excessive Heat Warning, sometimes preceded by an Excessive Heat Watch, is typically issued within one to three days of the onset of extremely dangerous heat conditions and remains in effect until the extreme danger subsides. Certainty is high that the event will occur

A Heat Advisory is typically issued within one to three days of the onset of dangerous heat and remains in effect until the danger subsides. These conditions pose a lesser, but still dangerous, risk to communities. Certainty is high that conditions will occur.

Here's a look at forecast high #temperatures for #Sunday and there departure from climatology.
– Dangerous heat and above normal highs persist in the Northwest and begin building in the Upper Midwest.
– Typical summer heat is also expected in the Southern U.S. and Northeast. pic.twitter.com/C6lUFNmxuc

— National Weather Service (@NWS) July 30, 2022