Cleveland residents can expect to finally see some rainfall after a dry spell, as a weather shift is bringing much-needed moisture to the region. According to the National Weather Service in Cleveland, a high-pressure system moved offshore of New England, making room for a low-pressure system coming in from the Upper Midwest into the northern Great Lakes by Monday. This low will be dragging a cold front across Ohio, slowly drenching the area in much-anticipated showers. The forecast indicates a series of low-pressure systems tracking along the front, with high pressure potentially returning by next weekend, as outlined in the NWS's Area Forecast Discussion.
The NWS details a changeover to an active pattern, which "will bring opportunities for badly needed rainfall." A cold front progressing into Northwest Ohio by Monday morning will slowly make its way across the state, suggesting the likelihood of measurable rain between Sunday and Monday evening. However, the forecast shows that the greatest chances for precipitation have shifted towards late Sunday night and Monday. With temperatures expected to rise into the mid to upper 80s on Sunday, followed by upper 70s to low 80s on Monday, Ohioans can also expect a warm and possibly humid start to their week.
Scattered convection is also anticipated to develop, especially on Sunday afternoon, due to a warm front that's currently pushing northward, which will subsequently place Northern Ohio and Northwest Pennsylvania in the warm sector by the afternoon. NWS meteorologist Garuckas pointed out worries on the timing and coverage of rainfall, stating via NWS, "continued the trend of slowing the timing and coverage of POPS compared to NBM today and tonight utilizing an NBM/CONSSHORT blend." The slow-moving nature of the front suggests that, while Sunday could see widely scattered showers, the more substantial rainfall is expected to hold off until later.
Aviation-wise, the NWS predicts generally VFR conditions through early Sunday afternoon with possibilities for non-VFR arising due to scattered showers and thunderstorms between Sunday afternoon and midnight. Garuckas mentioned that "strong deep layer effective shear of 20-25 knots and some dry mid-level air could lead to locally gusty winds," hinting the potential for a SWODY1 Marginal Risk across the entire region.
As for boaters on Lake Erie, a southerly flow is expected on Sunday, with winds reaching up to 15 knots and a short duration of 20 knots in the eastern basin. While a Small Craft Advisory isn’t currently in effect, it's a situation that will be closely monitored by the NWS. The week will also see a cold front cross the lake, necessitating that mariners keep abreast of changing conditions.
Looking into the rest of the week, while certainty decreases with the passage of time, the overall pattern suggests an ongoing chance for showers and thunderstorms through Wednesday night. As the system phases and moves out, Northeast Ohio may see a slow drying trend moving into the weekend, but Garuckas advises residents to stay tuned to updates: "Confidence further decreases in the extended given uncertainty with how the big closed low will eventually eject, which affects how soon the frontal boundary will push away from the region."
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