Denver is starting Tuesday under hazy, smoke-filtered skies with a high near 86°F — but the afternoon brings a serious severe thunderstorm threat that every Front Range resident should have on their radar before stepping outside. The National Weather Service is flagging a significant severe weather risk for the metro and lower elevations starting as early as 2 PM MT, lasting well into the evening.
Today’s Setup
A strengthening surface low east of the Rockies is pulling warm, moist air northward, fueling an unstable atmosphere across the Denver metro. Morning hours feature areas of smoke — air quality will be a factor before noon, so those with respiratory sensitivities may want to limit time outdoors early. Convection is expected to fire up by mid-afternoon as upslope flow kicks in, with the most potent storms pushing through the I-25 corridor and eastern suburbs during the evening hours. The 30% daytime storm chance climbs to 50% tonight, meaning this is far from a routine afternoon pop-up situation.
Severe Hail and Storm Risk
The NWS is being direct: very large hail exceeding 2–3 inches in diameter is possible with the strongest cells today. That’s baseball-sized hail, Denver — the kind that dents cars and breaks windows. Dangerous lightning and strong gusty winds round out the threat. A NOAA weather radio is your best line of defense, especially if storms roll through after dark. Keep a battery backup phone charger handy so you stay connected if the power flickers, and consider a portable power station if outages stretch longer. Stash important documents in a waterproof document bag before you head out this morning.
Best Window To Be Outside
Get it done before noon. Washington Park, the Cherry Creek Trail, and Sloan’s Lake are all gorgeous on a calm morning — just don’t linger past midday. Once clouds start stacking over the foothills, things can escalate quickly on the Front Range.
Tonight’s Events — Know Before You Go
Weird Al Yankovic plays Red Rocks Amphitheatre tonight. Red Rocks sits fully exposed at 6,450 feet, and a 50% evening storm chance is not a bluff up there. Bring a rain layer and check the venue’s weather policy. The Colorado Rockies host the Boston Red Sox at Coors Field tonight as well — expect possible weather delays in LoDo. Grab a Colorado Rockies jersey and rep the home team, but keep your eyes on the radar. Find tickets on StubHub if you’re still on the fence. Looking ahead, the R&B Tour starring Usher Raymond & Chris Brown hits Empower Field At Mile High on June 26 — that weekend forecast turns hotter and drier, so outdoor conditions should be better. Get tickets on SeatGeek and pick up an Usher Raymond & Chris Brown t-shirt before the show.
Storm Prep Meals
With severe weather in the forecast, tonight calls for a no-cook, no-fuss approach. A 2-week emergency food supply and a 5-gallon water storage container are smart additions to your storm kit right now. You can order groceries on Amazon and have shelf-stable essentials at your door before the afternoon storms arrive.
Next Few Days
Wednesday warms to near 89°F with another round of afternoon and evening storms after 3 PM MT — flash flood risk increases as soils saturate. Thursday continues the active pattern. The weekend turns hotter, drier, and windier, significantly ramping up fire danger across the mountains. Keep checking the Denver weather forecast for daily updates, and browse outdoor gear deals for storm-season essentials. The DARAN 288Wh Power Station at $90 is worth a look if you want reliable backup power before Wednesday’s storms.
