The first taste of true summer heat arrives later this week with temperature 20 degrees above normal. The same hot airmass that broke record highs across the West will begin to surge into Minnesota starting Wednesday. Confidence is high that the area will experience 90-degree heat and high humidity Friday and Saturday. Record highs are certainly possible during that time.
Long range models hint at 100-degrees or better Friday afternoon. I'm not buying it...yet. Thunderstorms may try to develop late in the weekend which could help to subdue the excessive warmth. Rain-cooled, evaporated air has the ability to cool the air down almost 10-20 degrees during summer.
A broad ridge of high pressure settles over the Midwest by Friday. Sinking motion within the atmosphere warms and dries the air. In addition, a southwesterly wind will drag in dewpoints likely exceeding 70 degrees at some point Friday-Saturday. This could easily make it feel like 100 degrees or hotter in the woods and on the singletrack.
Maximum Heat Index Forecast- Saturday
When the weather gets this hot out on the trail it is important to remember heat safety.
Summer brings warm afternoons perfect for biking, but the summer heat and humidity can also spark thunderstorms and severe weather. Be prepared for any type of adverse weather headed your way with Aeris Pulse.
NWS Twin Cities Weather Story