Weekend Outlook: Continued Chances of Afternoon Storms

As far as first weeks of August go, this one was just about as nice as it gets. Afternoon highs has been running at or below normal each of the last seven days, with daily afternoon storms across the state. Seven day mean maximum temperatures have been running 3 to 6 degrees F below normal for Denver, and even cooler than that across much of the southwest.

We’ll keep storm chances going this weekend. We’ll stick with 20 - 30% chances for Denver for now, and monitor how things play out as we head into Saturday morning. As it stands, it looks like about equal chances for storms Saturday through Monday, with best chances along the Front Range foothills, and again across the eastern Plains.

There’s a chance a for storms could be strong this weekend as well, especially east of the metro area. The Storm Prediction Center has issued a Slight Risk outlook for severe weather Saturday across extreme eastern Colorado account for this.

SPC Severe Weather Outlook

Temperatures look like they’ll remain at or below normal well into next week for Denver. Sunday will be the coolest day of the weekend with highs struggling to make it out of the 70s in the city. Saturday’s highs should be more typical for this time of year with temperatures in the upper 80s, but still a degree or two below average, much like we’ve seen all week.

If you’re planning to catch the ‘supermoon’ this Sunday, plan for the chance of storms. Hopefully any storms that do develop will be scattered enough to keep the horizon mostly clear! This full moon also coincides with the Perseid meteor shower which will prove a challenge for stargazers. If you get any photos of either events, please share them with us!

Early this morning (HST) tropical storm Iselle made landfall on the big island in Hawaii. The flood threat continues today as the storm slowly tracks east of the island and just south of the island chain over the next 24 hours.

Hurricane Julio became a Category 3 hurricane last night but is expected to gradually weaken as it nears the Hawaiian islands. Julio, unlike Iselle, is expected to track north of the islands, but could see cause some impacts as we head late into the weekend. New data due in shortly should help continue to narrow the eventual path of Julio, and I’d expect the trend to continue north.

A rare event indeed to have two storms threaten Hawaii from this direction. Iselle became just the second tropical storm in recorded history to make landfall on the big island. Had it stayed a hurricane at landfall, it would have been the first hurricane to do so in recorded history.

Brendan Heberton

Brendan is founder of Weather5280. He is co-founder of FreshyMap, and develops software for geospatial data analysis and visualization.

Denver, Colorado
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