On the evening of May 31st, 1985, a devastating and deadly tornado outbreak struck the Northeastern United States and Canada. 43 tornadoes and numerous damaging thunderstorms tore across Ohio, Pennsylvania, New York, and Ontario.  This event was the deadliest tornado outbreak of the 1980’s; killing 89 people in total, injuring more than 1,000 others, and racking up more than $600 million in property damage. In fact, since May 31, 1985, only two tornado days have been deadlier in the entire United States. The thunderstorms were supported by a cold front moving east across the northeastern U.S. ahead of a low pressure system moving northeastward through the Great Lakes region.  Unseasonably warm

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On the evening of May 31st, 1985, a devastating and deadly tornado outbreak struck the Northeastern United States and Canada. 43 tornadoes and numerous damaging thunderstorms tore across Ohio, Pennsylvania, New York, and Ontario.  This event was the deadliest tornado outbreak of the 1980’s; killing 89 people in total, injuring more than 1,000 others, and racking up more than $600 million in property damage. In fact, since May 31, 1985, only two tornado days have been deadlier in the entire United States. The thunderstorms were supported by a cold front moving east across the northeastern U.S. ahead of a low pressure system moving northeastward through the Great Lakes region.  Unseasonably warm

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Scattered severe thunderstorms capable of damaging winds, large hail & perhaps a tornado will be possible this afternoon. Greatest risk area includes locations between US-219 & I-81. Be Weather-Ready. Plan ahead if you have an outdoor event. Know how you will receive a warning if one is issued. Central Pa has been placed in a slight risk, while other parts of the state have been placed in a marginal and a general thunderstorm risk. If you have any outdoor activities planned, be sure to keep up to date with any watches, earnings, or advisories that may be issued.

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Scattered severe thunderstorms capable of damaging winds, large hail & perhaps a tornado will be possible this afternoon. Greatest risk area includes locations between US-219 & I-81. Be Weather-Ready. Plan ahead if you have an outdoor event. Know how you will receive a warning if one is issued. Central Pa has been placed in a slight risk, while other parts of the state have been placed in a marginal and a general thunderstorm risk. If you have any outdoor activities planned, be sure to keep up to date with any watches, earnings, or advisories that may be issued.

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Storms are expected to form by around noon across western PA and NY along the front, and will develop and move relatively slowly northeastward during the afternoon, possibly reaching Vermont by evening. The primary storm mode is expected to be cellular, but small lines may eventually form with outflow mergers. Hail is expected to be a main threat, with strong wind gusts eventually as well. Long hodographs along with weak but veering winds with height in the low levels suggest a few supercells are possible. A Slight risk cannot totally be ruled out in later outlooks, although marginal moisture and instability along with the overall weak surface pattern look to temper

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Storms are expected to form by around noon across western PA and NY along the front, and will develop and move relatively slowly northeastward during the afternoon, possibly reaching Vermont by evening. The primary storm mode is expected to be cellular, but small lines may eventually form with outflow mergers. Hail is expected to be a main threat, with strong wind gusts eventually as well. Long hodographs along with weak but veering winds with height in the low levels suggest a few supercells are possible. A Slight risk cannot totally be ruled out in later outlooks, although marginal moisture and instability along with the overall weak surface pattern look to temper

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The National Weather Service in Cleveland has issued a * Flash Flood Warning for… Southeastern Ashtabula County in northeastern Ohio… Southwestern Crawford County in northwestern Pennsylvania… * Until 700 PM EDT * At 356 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 2 and 3 inches of rain have already fallen. Localized flash flooding is likely. * Some locations that will experience flooding include… Meadville, Andover, Linesville, Harmonsburg, Adamsville, Atlantic, Cochranton, Cherry Valley, Conneaut Lake, Jamestown, Blooming Valley, Geneva and Hartstown. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. PRECAUTIONARY/PREPAREDNESS ACTIONS… Turn around, don`t drown when encountering flooded roads.

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The National Weather Service in Cleveland has issued a * Flash Flood Warning for… Southeastern Ashtabula County in northeastern Ohio… Southwestern Crawford County in northwestern Pennsylvania… * Until 700 PM EDT * At 356 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 2 and 3 inches of rain have already fallen. Localized flash flooding is likely. * Some locations that will experience flooding include… Meadville, Andover, Linesville, Harmonsburg, Adamsville, Atlantic, Cochranton, Cherry Valley, Conneaut Lake, Jamestown, Blooming Valley, Geneva and Hartstown. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. PRECAUTIONARY/PREPAREDNESS ACTIONS… Turn around, don`t drown when encountering flooded roads.

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…A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT FOR NORTHEASTERN MERCER AND NORTHWESTERN VENANGO COUNTIES… At 403 PM EDT, a severe thunderstorm was located over Sugarcreek, or near Franklin, moving northeast at 15 mph. HAZARD…60 mph wind gusts and half dollar-size hail. SOURCE…Radar. IMPACT…Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages. Locations impacted include… Franklin… Sugarcreek… Polk… Cooperstown… Utica… PRECAUTIONARY/PREPAREDNESS ACTIONS… Move to an interior room on the lowest floor of a building. Please report severe weather by calling 412-262-1988, posting to the NWS Pittsburgh Facebook page. The National Weather Service in Pittsburgh has issued a

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…A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT FOR NORTHEASTERN MERCER AND NORTHWESTERN VENANGO COUNTIES… At 403 PM EDT, a severe thunderstorm was located over Sugarcreek, or near Franklin, moving northeast at 15 mph. HAZARD…60 mph wind gusts and half dollar-size hail. SOURCE…Radar. IMPACT…Minor hail damage to vehicles is possible. Expect wind damage to trees and power lines, resulting in some power outages. Locations impacted include… Franklin… Sugarcreek… Polk… Cooperstown… Utica… PRECAUTIONARY/PREPAREDNESS ACTIONS… Move to an interior room on the lowest floor of a building. Please report severe weather by calling 412-262-1988, posting to the NWS Pittsburgh Facebook page. The National Weather Service in Pittsburgh has issued a

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The National Weather Service in Pittsburgh has issued a * Flash Flood Watch for portions of western Maryland, southwest Pennsylvania, and northern West Virginia, including the following areas, in western Maryland, Garrett. In southwest Pennsylvania, Allegheny, Fayette, Fayette Ridges, Greene, Washington, Westmoreland, and Westmoreland Ridges. In northern West Virginia, Eastern Preston, Eastern Tucker, Marion, Monongalia, Preston, Ridges of Eastern Monongalia and Northwestern Preston, and Western Tucker. * Until 10 PM EDT this evening * Slow-moving showers and thunderstorms are expected across the watch area during the afternoon and evening hours. Rainfall rates of 1 to 2 inches per hour are possible, which could cause localized flash flooding of small streams, as

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The National Weather Service in Pittsburgh has issued a * Flash Flood Watch for portions of western Maryland, southwest Pennsylvania, and northern West Virginia, including the following areas, in western Maryland, Garrett. In southwest Pennsylvania, Allegheny, Fayette, Fayette Ridges, Greene, Washington, Westmoreland, and Westmoreland Ridges. In northern West Virginia, Eastern Preston, Eastern Tucker, Marion, Monongalia, Preston, Ridges of Eastern Monongalia and Northwestern Preston, and Western Tucker. * Until 10 PM EDT this evening * Slow-moving showers and thunderstorms are expected across the watch area during the afternoon and evening hours. Rainfall rates of 1 to 2 inches per hour are possible, which could cause localized flash flooding of small streams, as

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A rainy holiday weekend ahead, as storms move into the Ohio Valley this weekend. Thunderstorms and rain are possible for today (May 26, 2017) with a general thunderstorm risk. Saturday may bring the potential for severe storms to fire in the western part of the state. A few counties in the SW corner of the state has been placed in a marginal risk for Saturday, May 27, 2017. The risk of severe storms is greater in those areas, and may bring damaging wind and hail. A general thunderstorm risk has been placed for areas outside of the marginal risk area. These storms MAY not be severe enough to cause any damage.

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A rainy holiday weekend ahead, as storms move into the Ohio Valley this weekend. Thunderstorms and rain are possible for today (May 26, 2017) with a general thunderstorm risk. Saturday may bring the potential for severe storms to fire in the western part of the state. A few counties in the SW corner of the state has been placed in a marginal risk for Saturday, May 27, 2017. The risk of severe storms is greater in those areas, and may bring damaging wind and hail. A general thunderstorm risk has been placed for areas outside of the marginal risk area. These storms MAY not be severe enough to cause any damage.

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While Monday’s rain will be accompanied by an increase in humidity in the southern mid-Atlantic, the concern for thunderstorms to produce isolated damaging winds should mainly be confined to the South. As Monday’s rain departs, residents will want to take full advantage of the milder and drier Tuesday that will unfold. More rain spreading into the mid-Atlantic on Tuesday will indicate that the dry spell will not last long. At the same time, another band of rain and thunderstorms will rotate into the Ohio Valley and Great Lakes at midweek before slowing swinging through the rest of the Northeast Thursday into Friday. Once again, residents will be facing disruptions to travel

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While Monday’s rain will be accompanied by an increase in humidity in the southern mid-Atlantic, the concern for thunderstorms to produce isolated damaging winds should mainly be confined to the South. As Monday’s rain departs, residents will want to take full advantage of the milder and drier Tuesday that will unfold. More rain spreading into the mid-Atlantic on Tuesday will indicate that the dry spell will not last long. At the same time, another band of rain and thunderstorms will rotate into the Ohio Valley and Great Lakes at midweek before slowing swinging through the rest of the Northeast Thursday into Friday. Once again, residents will be facing disruptions to travel

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*Tree pollen map* As rain passes through parts of the state, pollen counts remain in the moderate to high range. Tree pollen remains moderate to high across most of the state today. *Grass pollen map* Those who suffer from grass pollen allergies may be feeling some relief as pollen counts have dropped across most of the state. Levels will fluctuate throughout the week as scattered showers will be possible for most of the week. Those who suffer from ragweed allergies are in luck! Ragweed counts remain at a zero across the state. Relief from tree pollen will be felt towards midweek, along with grass pollen. *Ragweed pollen map*

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*Tree pollen map* As rain passes through parts of the state, pollen counts remain in the moderate to high range. Tree pollen remains moderate to high across most of the state today. *Grass pollen map* Those who suffer from grass pollen allergies may be feeling some relief as pollen counts have dropped across most of the state. Levels will fluctuate throughout the week as scattered showers will be possible for most of the week. Those who suffer from ragweed allergies are in luck! Ragweed counts remain at a zero across the state. Relief from tree pollen will be felt towards midweek, along with grass pollen. *Ragweed pollen map*

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A line of shallow convection is along an eastward moving cold front from southern lower Michigan southward into extreme northwest Ohio and eastern Indiana. Nevertheless, model guidance suggests potential for a few thunderstorms to develop along the eastward moving line as it crosses Ohio this afternoon and evening. Mid-level southwest winds will provide sufficient vertical shear for a few strong storms to develop with potential for locally strong wind gusts to occur. A small portion of the state has been placed in a marginal risk whereas, the western and part of the central areas of the state have been placed in a thunderstorm risk. Storms may be severe in some areas

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A line of shallow convection is along an eastward moving cold front from southern lower Michigan southward into extreme northwest Ohio and eastern Indiana. Nevertheless, model guidance suggests potential for a few thunderstorms to develop along the eastward moving line as it crosses Ohio this afternoon and evening. Mid-level southwest winds will provide sufficient vertical shear for a few strong storms to develop with potential for locally strong wind gusts to occur. A small portion of the state has been placed in a marginal risk whereas, the western and part of the central areas of the state have been placed in a thunderstorm risk. Storms may be severe in some areas

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