Well, let's be honest here. We have had a FABULOUS month this May. It was mostly clear and sunny (some rain but not a lot) with high temperatures in 70's and lows in the 50's at night. It was just great! But now reality is about to set in next week so enjoy this last week of May.
The good news is that the 90+ degree weather looks to be short lived and then temperatures will drop back into the low 80's. In the meantime, expect a mini-heatwave between May 31 and June 4.
Here is how the National Weather Service describes it:
.Long Term...(Friday through Wednesday) Issued at 259 AM EDT Thu May 25 2023 Models and ensembles are continuing the trend that the stagnant central CONUS ridge will likely keep an upper low that will develop in the southwest portion of trough, associated with a New England and Canadian Maritimes upper low, far enough southeast to keep showers away through Memorial Day. Previously, the GFS and its ensemble mean had it close enough to spit some afternoon QPF over central Indiana as early as Sunday. The upper ridge will provide dry and seasonable weather through the weekend. The only concern would be a potential for elevated fire danger as the continued dry weather gradually lowers 10 hour fuel moisture levels and northeast surface winds around the Great Lakes high will continue to reinforce MinRH levels to around 25 percent at times during the afternoon hours through at least Saturday. That said, winds will be marginal due to the weak pressure gradients both at the surface and top of the mixing height. For Holiday weekend outdoor activity planning, even in a worst case scenario, believe any shower activity will be brief, isolated, diurnal in nature and not until Monday afternoon at the earliest. Afternoon temperatures in the 70s to lower 80s along with the low humidity levels will make it feel comfortable for humans and pets alike. Isolated diurnal convection would seemingly be more plausible toward the middle of next week, when a broad ridge builds over the area and dew points rise as winds take on a southerly component. Even then, shear will be likely for any kind of organized convection. Being firmly entrenched under the ridge, 90+ degrees look a very real possibility by Tuesday or Wednesday.
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