Byesville, OH Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Byesville, OH

June 20, 2024 2:57 PM EDT (18:57 UTC) Change Location
Sunrise 5:57 AM   Sunset 9:01 PM
Moonrise 7:14 PM   Moonset 3:18 AM 
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7 Day Forecast for Marine Location Near Byesville, OH
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Area Discussion for - Pittsburgh, PA
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Area Forecast Discussion National Weather Service Pittsburgh PA 205 PM EDT Thu Jun 20 2024

A dangerous heat wave will impact the region this week. A Heat Advisory and Excessive Heat Warning are in effect through Saturday.
This event is highly unusual for our region and could be worse than the 1994 heat wave. Isolated afternoon thunderstorms may pose a damaging wind threat.


- Excessive Heat Warning for the urban areas of western PA; Heat Advisory continues elsewhere.
- Heat index values ranging from 100F to 110F.
- Isolated to scattered thunderstorms possible again this afternoon with downbursts the primary threat.

Less upper cloud coverage today has allowed temperatures to climb 4- 8 degrees warmer at noontime than those of 24 hours ago. As a result, cumulus have popped across the area with the achievement of convective temperatures. Thunderstorm-wise, we again are going to need a trigger as the DCAPE is in place with 1200 J/kg overlaid on 1500-2000 J/kg of uncapped MLCAPE. This will likely have to be the lake breeze or any remnant boundary settled across the area as upper waves visible on water vapor satellite on the northern periphery of the 596-598 dm ridge are off to our north. Weaker deep layer flow today (~10 kt 850-300 mb mean wind) may result in slow moving storms with localized heavy rainfall. Hi res ensemble paintballs favor north of Pittsburgh with downbursts again the threat, but these weakly forced setups are often handled poorly by CAMs. The northern half of our area remains in a Marginal Risk (1/5).

Highs are favored to reach back into the low to mid 90s and a 50-60% chance of >95 degrees, highest in the urban areas and valleys. With dew points still in the upper 60s/low 70s, heat index values will remain around or above 100 degrees. A 50-70% chance of lows >70 tonight will continue to provide little relief from the heat.

Potential impacts include heightened heat-related illnesses and power grid issues with increased demand. It is strongly encouraged to know where cooling shelters are located and stay hydrated. There may be little relief at night. Make a list of friends and family to check on and help them prepare. Prolonged exposure to excessive heat was the primary cause of weather-related fatalities in 2023. For our region, this heat wave may be compared to our worse than June of 1994. Please see the Climate section below for more numerical details on the kinds of records that may be in jeopardy.

Convection will wane after sunset and give way to a warm, muggy overnight period. Light wind and mostly clear skies may again allow for patchy fog development in the river valleys; hi res ensemble probabilities for visibility restrictions are 30-50%.


- Dangerous heat continues through Saturday with little relief at night.
- Excessive Heat Warning and Heat Advisory remain in effect through Saturday.
- Slight chance of thunderstorms in the afternoons.

Weak upper waves on the northern periphery of the 592-594 dm ridge, along with a lake breeze, may again allow for some pop up thunderstorms in the afternoon on Friday. With some weak flattening of the ridge axis, storms may be able to infiltrate more of the area, but confidence in these days is low as CAMs struggle with weakly forced environments. Latest hi res ensemble guidance shows a similar environment with a 60-90% chance of >1000 J/kg of CAPE. Weaker deep layer flow underneath the ridge similar to Thursday may keep shear values slightly less in the 15-20 kt range. This would still be sufficient for scattered storms capable of downbursts with modeled DCAPE >1000 J/kg.

The upper ridge will then begin to retrograde slowly on Saturday but still hold strong enough for one more day providing a continuation of the dangerous heat, and perhaps the hottest day with even the NBM 25th percentile suggesting mid 90s. Ensemble 850 mb temperatures still remain in the 22-24C range. Some records may be challenged.
Due to the compounding effects, continued heat indices at and above 100 degrees, and the WPC heat risk tool showing major to extreme impacts, the heat headlines remain in effect through Saturday.
That said, as with the past several days, some subtle weaknesses in the flow as the ridge axis pulls south could allow for isolated to scattered afternoon convection to throw wrinkles in the heat, but predictability in coverage and location is low probability at this time range.

With high confidence in lows remaining >70, this will provide little relief from the heat at night. Considering heat effects will be cumulative, this late week into the weekend looks compoundingly dangerous. The early season event, and temperatures increasing slightly each day, will exacerbate any existing heat issues.


- Relief from the heat favored with a passing trough over the Great Lakes Sunday into Monday.
- Cold front may return precipitation chances Sunday night.
- A weaker ridge builds in after Monday.

Come Sunday into Monday, the upper ridge will shunt south as a trough approaches from the northwest and slides through the Great Lakes. This will provide a reprieve from the extended period of extreme heat. Ensemble clusters indicate the approach of the trough and the passing of a cold front sometime late Sunday into Monday morning. General probability of rain increases along the boundary but slight disagreement on the strength and timing lends slightly lower confidence. Machine Learning hits the area for potential severe storms if the timing of the frontal passage is favorable. Northwest flow events always bare watching around here, especially with a cold front pushing through 70s dew points. Decreasing heights from 585dm Saturday to 579dm by Monday morning support slightly cooler temperatures.

Quieter conditions expected into Tuesday as a flat ridge begins to build over the Plains and surface high starts to develop around the Great Lakes as heights begin to rise. Temperatures are expected to rise into the upper 80s to lower 90s but early ensemble indications are that it won't be as oppressive as the past week's event.

VFR conditions and light/calm wind will continue as high pressure remains the dominant feature across the region. Have kept TSRA mention out of TAFs with no apparent trigger to initiate convection in latest guidance or obs. Best chance would be FKL if convection develops along an area of lake- breeze convergence.

Mainly VFR and dry weather will continue outside of any isolated thunderstorms. Restrictions with rain may return late this weekend with a cold front.

The area has the potential to break various heat-related records.

There is low probability that climate sites approach the highest temperatures recorded in the 21st century:

Pittsburgh, PA: 98F (7/7/2012)
Wheeling, WV: 98F (7/7/2012)
Morgantown, WV: 101F (7/7/2012)
New Philadelphia, OH: 101F (7/7/2012)
Zanesville, OH: 101F (7/7/2012)
DuBois, PA: 101F (7/22/2011)

There is a modest probability many June all-time temperature records may be at stake:

PIT: 98F (1988)
HLG: 100F (1933)
MGW: 99F (1893)
PHD: 99F (1988)
ZZV: 101F (1988,1934)
DUJ: 92F (1969) *RECORD TIED ON 6/18/24*

Daily high maximum (left) and high minimum (right) temperature records are at stake for:

Thursday, June 20th Pittsburgh, PA: 95F (1994) 78F (1924)
Wheeling, WV: 97F (1933) 70F (1924)
Morgantown, WV: 99F (1893) 75F (1924)
New Philadelphia, OH: 95F (1994) 71F (2009)
Zanesville, OH: 98F (1934) 75F (1924)
DuBois, PA: 89F (1991) 66F (1996)

Friday, June 21st Pittsburgh, PA: 95F (1933) 73F (1934)
Wheeling, WV: 99F (1933) 69F (2016)
Morgantown, WV: 95F (1953) 72F (1988)
New Philadelphia, OH: 94F (1994) 72F (2016)
Zanesville, OH: 97F (1988) 72F (1997)
DuBois, PA: 89F (1991) 68F (1988)

Saturday, June 22nd Pittsburgh, PA: 98F (1988) 75F (1988)
Wheeling, WV: 95F (1923) 72F (2011)
Morgantown, WV: 96F (1923,1988)73F (1988)
New Philadelphia, OH: 97F (1988) 71F (1997)
Zanesville, OH: 99F (1988) 71F (1997)
DuBois, PA: 91F (2022) 68F (2022)

PA...Heat Advisory until 8 PM EDT Saturday for PAZ007>009-013-015- 016-022-031-074-076>078.
Excessive Heat Warning until 8 PM EDT Saturday for PAZ014-020- 021-029-073-075.
OH...Heat Advisory until 8 PM EDT Saturday for OHZ039>041-048>050- 057>059-068-069.
WV...Heat Advisory until 8 PM EDT Saturday for WVZ001>004-012-021- 509>511.

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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KCDI CAMBRIDGE MUNI,OH 2 sm22 minSSW 0610 smClear90°F66°F46%30.31
KZZV ZANESVILLE MUNI,OH 15 sm64 mincalm10 smA Few Clouds88°F66°F49%30.32
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