As a high pressure system hangs over the mid-Atlantic today, severe weather risks move through the Midwest. Precipitation will remain at zero today, before another low pressure system moves through on Monday. Most of the state has been placed in a marginal risk for thunderstorms, as the low pressure system moves towards the mid- Atlantic region for Monday, July 10. Some storms may be isolated and severe at times. The chance of damaging storms and wind is about one to five percent. Additional updates will be made as needed. To continue monitoring potential severe weather, follow our forecasts at Pennsylvania Weather Authority. Advertisements

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As a high pressure system hangs over the mid-Atlantic today, severe weather risks move through the Midwest. Precipitation will remain at zero today, before another low pressure system moves through on Monday. Most of the state has been placed in a marginal risk for thunderstorms, as the low pressure system moves towards the mid- Atlantic region for Monday, July 10. Some storms may be isolated and severe at times. The chance of damaging storms and wind is about one to five percent. Additional updates will be made as needed. To continue monitoring potential severe weather, follow our forecasts at Pennsylvania Weather Authority. Advertisements

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Tropical Depression Four formed in the Atlantic Ocean late on July 5, adding to what’s been an odd start to the 2017 Atlantic hurricane season, but it dissipated two days later. The tropical depression was pushed across the tropical Atlantic by strong easterly winds during the first week of July. Throughout much of TD4’s lifespan, it was surrounded by dry air and dust from the Saharan desert. Wind shear aloft expedited the dissipation process on July 7th. The tropical depression did not impact land and opened up into a tropical wave in the central Atlantic due to dry air entrapment and upper-level wind shear. While the majority of July tropical storms in the Atlantic

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Tropical Depression Four formed in the Atlantic Ocean late on July 5, adding to what’s been an odd start to the 2017 Atlantic hurricane season, but it dissipated two days later. The tropical depression was pushed across the tropical Atlantic by strong easterly winds during the first week of July. Throughout much of TD4’s lifespan, it was surrounded by dry air and dust from the Saharan desert. Wind shear aloft expedited the dissipation process on July 7th. The tropical depression did not impact land and opened up into a tropical wave in the central Atlantic due to dry air entrapment and upper-level wind shear. While the majority of July tropical storms in the Atlantic

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Strong to severe thunderstorms are expected to develop across the Ohio Valley and portions of the lower Great Lakes later today. A few strong storms can also be expected across the central High Plains extending along a front into the Ozark Plateau. Substantial mid-level drying favors damaging winds in addition to large hail. SLIGHT RISK:  Issued frequently during the peak severe weather season and implies that well-organized severe thunderstorms are expected but in relatively small numbers/coverage, or there is a small chance of a more significant severe event. Typically, Slight Risk areas produce scattered severe weather, including scattered wind damage or severe hail and possibly some isolated tornadoes.  Significant severe events (75 mph wind,

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Strong to severe thunderstorms are expected to develop across the Ohio Valley and portions of the lower Great Lakes later today. A few strong storms can also be expected across the central High Plains extending along a front into the Ozark Plateau. Substantial mid-level drying favors damaging winds in addition to large hail. SLIGHT RISK:  Issued frequently during the peak severe weather season and implies that well-organized severe thunderstorms are expected but in relatively small numbers/coverage, or there is a small chance of a more significant severe event. Typically, Slight Risk areas produce scattered severe weather, including scattered wind damage or severe hail and possibly some isolated tornadoes.  Significant severe events (75 mph wind,

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Skywatchers have a rare chance to easily locate Saturn as it passes close by the moon Thursday night (July 6), its famous rings wide open to our line of sight. The object that most people want to see in a telescope is the ringed planet Saturn, folks who own a telescope often claim that they have yet to see it. Right now Jupiter can be identified high in the west-southwest sky soon after sunset, it is the brightest object in the sky, aside from the moon. About one hour after sunset, look toward the south-southeast sky. Roughly one quarter up from the horizon to the point overhead will be a nearly

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Skywatchers have a rare chance to easily locate Saturn as it passes close by the moon Thursday night (July 6), its famous rings wide open to our line of sight. The object that most people want to see in a telescope is the ringed planet Saturn, folks who own a telescope often claim that they have yet to see it. Right now Jupiter can be identified high in the west-southwest sky soon after sunset, it is the brightest object in the sky, aside from the moon. About one hour after sunset, look toward the south-southeast sky. Roughly one quarter up from the horizon to the point overhead will be a nearly

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Tropical Depression Four remains poorly organized, centered at midday about 1260 miles (2030 km) east of the Lesser Antilles. Large-scale dry, sinking air associated with a previous Saharan Air Layer outbreak continues to be the primary inhibiting factor affecting this tropical cyclone. Maximum sustained winds are near 30 mph (45 km/h) with higher gusts. Little change in strength is forecast during the next 48 hours, and the depression is not currently expected to become a tropical storm. Tropical Depression 4 has formed in the far eastern Atlantic. It’s not forecasted to become a tropical storm at this time per the NHC. TD 4 is the 4th tropical cyclone to form east

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Tropical Depression Four remains poorly organized, centered at midday about 1260 miles (2030 km) east of the Lesser Antilles. Large-scale dry, sinking air associated with a previous Saharan Air Layer outbreak continues to be the primary inhibiting factor affecting this tropical cyclone. Maximum sustained winds are near 30 mph (45 km/h) with higher gusts. Little change in strength is forecast during the next 48 hours, and the depression is not currently expected to become a tropical storm. Tropical Depression 4 has formed in the far eastern Atlantic. It’s not forecasted to become a tropical storm at this time per the NHC. TD 4 is the 4th tropical cyclone to form east

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General thunderstorms to move across the state late afternoon into the evening, as a low pressure front continues to move in from the plains. The synoptic-scale upper-air pattern continues to amplify and simplify, as a large anticyclone and associated ridging dominate gbr West, and heights fall across much of eastern Canada and the Great Lakes. A longstanding regime of weak but well-defined troughing from parts of TX to the Ozarks and lower OH Valley region will phase with the Great Lakes troughing. This will occur as the northern part of a shortwave trough — now evident in moisture-channel imagery from eastern IL across the Ozarks to central/southwest TX –moves eastward to

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General thunderstorms to move across the state late afternoon into the evening, as a low pressure front continues to move in from the plains. The synoptic-scale upper-air pattern continues to amplify and simplify, as a large anticyclone and associated ridging dominate gbr West, and heights fall across much of eastern Canada and the Great Lakes. A longstanding regime of weak but well-defined troughing from parts of TX to the Ozarks and lower OH Valley region will phase with the Great Lakes troughing. This will occur as the northern part of a shortwave trough — now evident in moisture-channel imagery from eastern IL across the Ozarks to central/southwest TX –moves eastward to

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High chance (80%) of development for Invest #94L. It’s already producing TS force winds. Could become TD or TS at anytime. Early morning satellite images on this Tuesday indicate that the cloud pattern associated with the low pressure system located over the far eastern tropical Atlantic Ocean about 800 miles west-southwest of the Cabo Verde Islands has not changed very much in organization. Environmental conditions, however, are favorable for a tropical depression or a tropical storm to form within the next 24 hours or so while the low moves westward or west-northwestward at 10 to 15 mph across the tropical Atlantic. For more information, follow Pennsylvania Weather Authority and Hurricane Tracker

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High chance (80%) of development for Invest #94L. It’s already producing TS force winds. Could become TD or TS at anytime. Early morning satellite images on this Tuesday indicate that the cloud pattern associated with the low pressure system located over the far eastern tropical Atlantic Ocean about 800 miles west-southwest of the Cabo Verde Islands has not changed very much in organization. Environmental conditions, however, are favorable for a tropical depression or a tropical storm to form within the next 24 hours or so while the low moves westward or west-northwestward at 10 to 15 mph across the tropical Atlantic. For more information, follow Pennsylvania Weather Authority and Hurricane Tracker

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Tropical Storm Cindy left thousands without power, and heavy rain caused major flooding along the Gulf coast last month. As thousands are still drying out and cleaning up after Cindy pushed her way into the northeast, another potential storm is being monitored. The National Hurricane Center continues to monitor a broad area of low pressure that has remained nearly stationary over the far eastern tropical Atlantic Ocean about 650 miles west-southwest of the Cabo Verde Islands. Shower and thunderstorms are still disorganized, environmental conditions are expected to become more conducive for some development of this system later this week while the disturbance moves westward at 5 to 10 mph. This storm has

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Tropical Storm Cindy left thousands without power, and heavy rain caused major flooding along the Gulf coast last month. As thousands are still drying out and cleaning up after Cindy pushed her way into the northeast, another potential storm is being monitored. The National Hurricane Center continues to monitor a broad area of low pressure that has remained nearly stationary over the far eastern tropical Atlantic Ocean about 650 miles west-southwest of the Cabo Verde Islands. Shower and thunderstorms are still disorganized, environmental conditions are expected to become more conducive for some development of this system later this week while the disturbance moves westward at 5 to 10 mph. This storm has

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General non-severe storms are likely to stretch across much of the state today, the percentage of severity is less than five. This means that damaging wind, hail, and isolated tornadoes are NOT likely to occur. This will give a break for those who dealt with damaging storms on Saturday. Gusty winds are likely because of a strong convection across the central Gulf States, but extensive damage from these are not likely. A layer cooling will stretch across the Mid-Atlantic region for much of Sunday through Monday. A general risk will remain for the northern section of the state for Monday, however, the severity of some cells will still not go above

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General non-severe storms are likely to stretch across much of the state today, the percentage of severity is less than five. This means that damaging wind, hail, and isolated tornadoes are NOT likely to occur. This will give a break for those who dealt with damaging storms on Saturday. Gusty winds are likely because of a strong convection across the central Gulf States, but extensive damage from these are not likely. A layer cooling will stretch across the Mid-Atlantic region for much of Sunday through Monday. A general risk will remain for the northern section of the state for Monday, however, the severity of some cells will still not go above

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BANDS OF SHOWERS AND THUNDERSTORMS WILL TAPER OFF FROM WEST TO EAST ACROSS THE WESTERN PORTION OF CENTRAL PENNSYLVANIA BY LATE AFTERNOON. SOME STORMS WILL HAVE VERY HEAVY DOWNPOURS AND GUSTY WINDS. THE SHOWERS ARE MOVING NORTHEAST AT 25 MPH. Locations impacted: BEDFORD-BLAIR-CAMBRIA-CAMERON-CLEARFIELD-ELK-FULTON-HUNTINGDON- MCKEAN-MIFFLIN-NORTHERN CENTRE-NORTHERN CLINTON-POTTER-SOMERSET-SOUTHERN CENTRE-SOUTHERN CLINTON-WARREN- INCLUDING THE CITIES OF…ALTOONA…JOHNSTOWN…STATE COLLEGE. ADAMS-COLUMBIA-CUMBERLAND-DAUPHIN-FRANKLIN-JUNIATA-LANCASTER-LEBANON- MONTOUR-NORTHERN LYCOMING-NORTHUMBERLAND-PERRY-SCHUYLKILL-SNYDER- SOUTHERN LYCOMING-SULLIVAN-TIOGA-UNION-YORK-INCLUDING THE CITIES OF…HARRISBURG…LANCASTER…WILLIAMSPORT…YORK.

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BANDS OF SHOWERS AND THUNDERSTORMS WILL TAPER OFF FROM WEST TO EAST ACROSS THE WESTERN PORTION OF CENTRAL PENNSYLVANIA BY LATE AFTERNOON. SOME STORMS WILL HAVE VERY HEAVY DOWNPOURS AND GUSTY WINDS. THE SHOWERS ARE MOVING NORTHEAST AT 25 MPH. Locations impacted: BEDFORD-BLAIR-CAMBRIA-CAMERON-CLEARFIELD-ELK-FULTON-HUNTINGDON- MCKEAN-MIFFLIN-NORTHERN CENTRE-NORTHERN CLINTON-POTTER-SOMERSET-SOUTHERN CENTRE-SOUTHERN CLINTON-WARREN- INCLUDING THE CITIES OF…ALTOONA…JOHNSTOWN…STATE COLLEGE. ADAMS-COLUMBIA-CUMBERLAND-DAUPHIN-FRANKLIN-JUNIATA-LANCASTER-LEBANON- MONTOUR-NORTHERN LYCOMING-NORTHUMBERLAND-PERRY-SCHUYLKILL-SNYDER- SOUTHERN LYCOMING-SULLIVAN-TIOGA-UNION-YORK-INCLUDING THE CITIES OF…HARRISBURG…LANCASTER…WILLIAMSPORT…YORK.

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