2PM MDT, Friday, June 28, 2019
Today may be the hottest and driest of the next three days. Temperatures along the urban corridor on Saturday are likely to exceed 90 again in most areas, but there will be a bit more moisture in the atmosphere which means that some clouds and thunderstorms might take the edge of the heat during the afternoon in some spots. On Sunday a little more moisture in the atmosphere will likely lead to more widespread thunderstorms in the afternoon and evening. Afternoon temperatures on Sunday probably won’t get all the way to 90 for many areas, but it should still be a warm day. That pattern is likely into early next week: near average temperatures and some afternoon and evening thunderstorms for some spots.
5:30 AM MDT, Thursday, June 20, 2019
The summer solstice occurs tomorrow, June 21st at 9:54 AM MDT. But the official start to summer won’t be accompanied by classic summer weather this weekend. Average maximum temperatures this time of year in Fort Collins-Boulder-Denver-ColoradoSprings is low to mid 80s. We are likely to be 10-15 degrees below that for our maximums this Friday to Sunday.
There is a slight chance for a thunderstorm this afternoon, but most areas will stay dry. Behind the cold front on Friday there is a much better chance for showers and thunderstorms in the afternoon and evening, with some areas of rain or drizzle lingering into Saturday morning. Saturday and Sunday will likely see more scattered showers, mainly late in the day.
For those wondering when we are going to get a stretch of hot weather, your wait may be almost over. It appears that by the middle of next week we will be in a pattern of generally dry weather with average to above average temperatures. At least right now it looks like the first 90-degree days may occur before June is over.
1;40 PM MDT, Friday, June 14, 2019
Today will be the last very warm day for a few days, although it’s not likely to get very cool. Expect the weekend to be a little below the average (average high temperatures for mid June in Boulder-Denver is low 80s).
The atmosphere is unstable today, but not very moist in the low levels. So incidents of heavy rain and hail in thunderstorms should be localized. Most areas probably won’t see significant rain, but are more likely to see gusty winds from thunderstorms outflows. It appears that Saturday will be a bit more moist, so there may be more coverage of rain in afternoon/evening thunderstorms, and then maybe back to a slightly drier trend on Sunday.
5:30 AM MDT, Friday, June 7, 2019
Today should be a typical early June day with afternoon temperatures climbing above 80 in the lower elevations and the development of a scattering of afternoon/evening thunderstorms. Saturday will start out on the warm side of the cold front, but during the afternoon (maybe late morning in Cheyenne) we are likely to see a windshift to the northeast and a trend toward cooler temperatures. A generally cloudy period is likely late Saturday into early Sunday with some thunderstorms late Saturday and maybe some fog or drizzle Saturday night or Sunday morning. The clouds will probably break up during the day Sunday, but temperatures will likely remain below 70 for the highs Denver, Boulder, Colorado Springs and Fort Collins.
Although the shift to cooler weather will be statewide, the magnitude of the cool-down and the chance for rain will be lower in West Slope areas.