Mountain View snow report

001 FXUS61 KCLE 200627 AFDCLE Area Forecast Discussion National Weather Service Cleveland OH 227 AM EDT Wed May 20 2026 .WHAT HAS CHANGED... A Severe Thunderstorm Watch has been issued for western counties until 7PM this evening. Some convection has begun to develop upstream of the area and is expected to move into the destabilizing area across NW OH. Current temperatures have surged into the mid 80s with dewpoints in the upper 60s. The primary concern remains strong winds. Will need to continue to monitor conditions further east to determine if any expansion is needed. && .KEY MESSAGES... 1) The entire area remains highlighted in Slight Risk (level 2 of 5) for severe weather late this afternoon into the evening. Primary threat remains strong winds, although localized heavy rainfall and small hail are possible. 2) A big cool down is on the way for Wednesday and Thursday as high moves into the area. 3) An unsettled weather pattern with multiple chances of showers and thunderstorms are expected to impact the holiday weekend. && .DISCUSSION... KEY MESSAGE 1... This afternoon, a few light showers continue to linger across far NEOH and NWPA, keeping cloud cover over that portion of the area and limiting keeping destabilization at a minimum right now. However, across western counties, cloud decks have scattered out and temperatures have quickly rose into the low 80s with dewpoints in the upper 60s, trending towards the low 70s. This has allowed for rapid destabilization with modeled soundings suggesting SB CAPE already in the 2000-2500 J/kg range and steepening low level lapse rates close to 8 C/km. The best shear with this event should remain north of the area with bulk shear values in the 15-25 knot range. Given these environmental conditions, would not be surprised to see some isolated storms develop this afternoon ahead of a main line expected to push east later this evening. DCAPE values near 1000 J/kg add confidence that the primary hazard concern with any convection with be strong to damaging winds. Cannot rule out some small hail, especially in the discrete cells ahead of the primary line. The tornado threat remains very low, although not zero, given the best shear is to the north of the area. Any quick spin ups that do occur would likely be embedded within the line of convection this evening. The final concern is locally heavy rainfall, especially in the most developed cells, that could lead to localized ponding on area roads. Modeled soundings suggest that brief training of cells could occur this evening along the boundary which would coincide in timing with an increased warm cloud layer and PWAT push. Overall concern for widespread flooding this evening remains low, but to highlight the potential WPC has included the entire area in a Marginal Risk (level 1 of 5) ERO today. KEY MESSAGE 2... Late tonight, a strong cold front is expected to move east across the area, marking a transition back to much cooler temperatures for Wednesday and Thursday. High temperatures are expected to be nearly 20 degrees cooler compared to today, only climbing into the upper 50s to low 60s as 850mb of 5-7C nudge south over the area. Some lingering showers will be possible across the southern tier of counties on Wednesday before the cold front fully pushes south and high pressure dries everything out through Thursday. Unfortunately, that means that Wednesday will be rather dreary as cloud coverage across the area lingers before peaks of sunshine return on Thursday. To compliment daytime highs, overnight lows Wednesday night will fall into the low to mid 40s and into the upper 40s to low 50s Thursday night. At this point, there is no concern for a late season frost. KEY MESSAGE 3... The upcoming holiday weekend will be fairly unsettled as multiple shortwave troughs push east across the region, bringing chances of showers and thunderstorms to the area as a near stationary boundary settles somewhere near the CWA. Initially, this boundary on Friday should begin to push north of the area, marking a transition back to warmer and more seasonable temperatures for the weekend. Then this boundary will ebb and flow over the CWA as the aforementioned troughs push east. As moisture increases over the area, multiple rounds of rainfall, potentially heavy at times, will result in possible flood concerns across area rivers and potential aerial flooding where rain persists. WPC has already highlighted the area in a Day 4 Marginal (level 1 of 5) ERO. The thunder potential should be isolated to daytime hours as diurnal instability adds additional support for shower development, but any severe potential remains uncertain at this time. Highs throughout the weekend will be in the 70s with mild overnight lows in the 60s. && .AVIATION /06Z Wednesday THROUGH Sunday/... A cold front is near TOL as of 6z and will sweep southeast across all terminals through 11-12z. Ahead of the front mainly VFR prevails, though with a few showers towards central Ohio and some patchy lower ceilings across far eastern OH and northwestern PA. All will fall to low MVFR to IFR with the frontal passage...have IFR included at MFD/CAK/YNG/ERI, and can`t rule out brief IFR at CLE. Showers will fill back in this morning, mainly south of TOL-CLE-ERI, before exiting to the south and southeast late this afternoon and evening. Some occasional visibility restrictions may accompany these showers, especially at MFD/CAK/YNG. Ceilings gradually climb through MVFR and back to VFR late this morning and afternoon from north to south as drier air gradually filters in. Winds will turn initially northwest and then quickly north-northeast at around 10kt behind the front this morning and persist at that general speed and direction into tonight. Outlook...Non-VFR expected at times in rain late Friday through Saturday night. Scattered showers and thunderstorms with brief non-VFR again possible Sunday afternoon and evening. && .MARINE... Winds are quickly turning north-northeast early this morning as a cold front crosses the lake. Winds will briefly increase to around 15kt across the western and central basins this morning, which will briefly build waves to 2-4 feet with those waves being driven towards the shore. Winds briefly lull this afternoon. A stronger pressure gradient is expected Thursday into Friday as high pressure slides north and northeast of Lake Erie. Winds will turn northeast tonight and increase to 15-20kt. Winds will remain northeast and increase further to 20-25kt at times Thursday and Thursday night. Winds gradually turn more easterly and then southeasterly Friday and Friday night, remaining elevated at 15-25kt until late Friday night or early Saturday. Small Craft Advisories and Beach Hazards Statements will be needed for most or all nearshore waters beginning overnight tonight or early Thursday. Will not hoist those with this package but they will be coming today at some point. Looking ahead to the holiday weekend, generally southerly winds may be elevated enough to cause issues for smaller craft on Saturday. Winds will trend lighter for Sunday and Monday and eventually come around to the northwest. It will be unsettled with periods of rain and perhaps some thunderstorms Saturday and Sunday, with a drying trend likely by Monday. && .CLE WATCHES/WARNINGS/ADVISORIES... OH...None. PA...None. MARINE...None. && $$ DISCUSSION...04 AVIATION...Sullivan MARINE...Sullivan