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Excessive Heat Watch issued by NWS Seattle for northwest and central western Washington

Whatcom County Fire District 7 crews provide a fun way to cool down at Pioneer Park in Ferndale during a heat wave (June 28, 2021). Photo: Whatcom News
Whatcom County Fire District 7 crews provide a fun way to cool down at Pioneer Park in Ferndale during a heat wave (June 28, 2021). Photo: Whatcom News

WHATCOM COUNTY, Wash. — The Seattle office of the National Weather Service (NWS) has issued an Excessive Heath Watch for western Washington including Whatcom County between noon on Wednesday, August 11th, and 11pm Saturday.

The NWS watch statement says to expect hot and humid conditions with heat index values up to 98 to 100 possible. They are forecasting the following.

  • Puget Sound: 94-98 degrees
  • South Sound and Chehalis Valley: 97-101 degrees
  • Western slopes of the Cascades: 92-98 degrees

Weather forecasts for locations around Whatcom County warn to expect unseasonably high temperatures Wednesday through Saturday, peaking Thursday between 87° and 100° at different locations around the county.

Forecast high temperatures as of August 9th are as follows.

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LocationWednesdayThursdayFridaySaturday
Bellingham76°87°80°78°
Ferndale80°95°84°81°
Birch Bay78°93°84°80°
Blaine82°98°88°83°
Lynden86°100°92°87°
Sumas87°99°95°88°
Everson/Nooksack85°99°94°88°
Glacier81°88°87°82°
Acme82°93°90°84°
Sudden Valley79°91°88°83°

NWS warns extreme heat and humidity significantly increases the potential for heat-related illnesses, particularly for those working or participating in outdoor activities.

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