Area Forecast Discussion
Issued by NWS Cleveland, OH
Issued by NWS Cleveland, OH
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248 FXUS61 KCLE 050824 AFDCLE Area Forecast Discussion National Weather Service Cleveland OH 424 AM EDT Sun May 5 2024 .SYNOPSIS... A cold front brings showers and thunder storms today, exiting to the east tonight. High pressure builds in from the north for Monday. A warm front comes through Tuesday, followed by a cold front Tuesday night. && .NEAR TERM /THROUGH MONDAY/... Cold front stretching from Michigan through Indiana and western Kentucky will track eastward into western Ohio over the next few hours, then into the CWA through the late morning and afternoon. Currently, ahead of the cold front, convection firing along PVA in the southwesterly flow aloft. The cold front coming through later today will provide forcing for convective initiation after 16Z. Modest SBCAPE becomes available with some heating, but with modest lapse rates and in the mid levels and low/mid level flows less than 25kts, only expecting some wind gusts and perhaps some hail. Still outlooked for a marginal risk from SPC generally east of I-71 but think any issues with convection today would be isolated, although non-zero. Cold front should be east of the CWA by 03Z Monday with low and mid level clearing. Surface high pressure over the Great Lakes will then build in from the north tonight taking POPs south of the CWA. Meanwhile, a trough axis again in the southwesterly flow will begin moving into the Ohio Valley, bringing POPs northward again, but coming up short of the southern zones by 00Z Tuesday. Behind the cold front, a bit cooler weather expected Monday with mid 60s north to lower 70s south. && .SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY NIGHT/... High pressure over the eastern Great Lakes will shift to New England by Tuesday. At the same time, a 120 knot upper level jet rounds the base of the Plains trough with the trough becoming oriented from Minnesota to the Central Great Lakes. Low level moisture advection ramps up as a surface trough weakens while reaching the local area. Slowed down chances of rain although pops remain fairly high as the warm front lifts north Tuesday afternoon and evening. Instability may reach 1500-2000 J/kg of ml CAPE. 0-6km shear values vary based on different model solutions but could be in the 30-50 knot range. The Storm Prediction Center has included most of the western half of the area in a Slight Risk for severe weather with a marginal risk extending a little farther east to nearly the Ohio/Pennsylvania state line. High temperatures are forecast to reach the mid 70s to near 80 degrees with dewpoints climbing into the low 60s along the front. Organized convection appears possible both along the northward moving warm front and ahead of the cold front that will settle back south Tuesday evening. Most lingering activity should exit the area to the east Wednesday morning. Cooling behind the front on Tuesday looks negligible with highs on Wednesday back into the upper 70s. Can not rule out a low chance of showers and thunderstorms during the afternoon on Wednesday depending on the where the frontal boundary stalled. && .LONG TERM /THURSDAY THROUGH SATURDAY/... Another area of low pressure is forecast to track northeast from the southern Plains to the Central Great Lakes on Thursday bringing more showers and possibly thunderstorms. A stronger cold front will push south across the area Thursday night into Friday morning as the upper level trough deepens overhead. High temperatures will be below normal Friday and Saturday and followed guidance trends in lowering temperatures a few degrees for both days. Temperatures will generally be in the low 60s but may not get out of the 50s in NW Pennsylvania where 850mb temperatures may be as low as 3-4C. Models are struggling with how to handle the interaction between this trough and another piece of energy diving south out of Canada. In general expecting the weekend to be on the cool side of normal with scattered showers and a broad cyclonic flow. && .AVIATION /06Z Sunday THROUGH Thursday/... Have a mixed bag of ceilings and visibilities at this hour for the terminals in our area. Some clearing in NW OH has allowed for fog development at TOL while further east, MVFR/IFR ceilings prevail, and a few scattered showers exist. Expect these trends to continue through the remainder of the overnight and into the day Sunday. Chances for showers/storms increase after 18Z east of I-71 primarily as a cold front tracks west to east through the region, and highlight the CAK/YNG terminals for this threat. Low ceilings to linger in the wake of this cold front. Wind gusts possible in these storms. Outlook...Non-VFR likely with periodic showers and thunderstorms on Tuesday and Wednesday. && .MARINE... A trough will cross Lake Erie today, pulling a cold front southeast across the lake. Winds veer to the north behind the front and increase to 10 to 20 knots with waves building to 1 to 3 feet. Winds veer to northeasterly on Monday as high pressure builds from the central to eastern Great Lakes. An active pattern will follow for the remainder of the week. A warm front will lift north across the lake on Wednesday with southwesterly winds of 10-15 knots. A second area of low pressure is expected to track near Lake Erie on Thursday, pulling a stronger cold front south behind it on Friday. The track of this low may change and have an effect on wind direction, speeds, and wave heights. Tentatively conditions look to approach Small Craft Advisory criteria by Friday. && .CLE WATCHES/WARNINGS/ADVISORIES... OH...None. PA...None. NY...None. MARINE...None. && $$ SYNOPSIS...26 NEAR TERM...26 SHORT TERM...KEC LONG TERM...KEC AVIATION...26 MARINE...KEC