Flooding potential increases, with Pennsylvania counties also under Flood and Tornado Watches

UPDATE – 1:10PM SATURDAY: A TORNADO WATCH has been issued for Potter, McKean and other Northwestern Pennsylvania counties until 8PM today, following a FLOOD WATCH posted earlier.

Individuals in Watch and other nearby areas should be prepared to receive emergency alerts and act immediately to seek appropriate shelter in event of a WARNING.

Check this morning’s post below for other reports of active weather for Allegany and adjoining counties.
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BREAKING: Opportunities for localized flooding in Allegany and surrounding New York counties of the Southern Tier have been elevated from a Marginal to Slight Risk today, along with a small potential for tornadic action also being bumped up in the southern part of the county. Neighboring Pennsylvania counties now are under a FLOOD WATCH through late tonight.

Rain, accompanied by increasing wind gusts, has entered Allegany County from the west this morning, and is forecast to vary as to intensity throughout the day, with a lesser potential Sunday.

— The possibility of flooding has increased in the region, with forecasts for more than two inches of rain possible in some areas as drenching precipitation falls intermittently during the day.

The geographic area for the two-out-of-five level for a Slight Risk of excessive rain has been greatly expanded from Pennsylvania into New York State since yesterday.

Excessive runoff may result in flooding of creeks, small streams, and other low-lying and flood-prone locations, according to the National Weather Service (NWS) at State College, Pa., which reports for Northern Pennsylvania, and flash flooding may occur in poor drainage and urban areas.

Do not enter flooded roadways. Turn Around Don’t Drown.

— Potential for severe thunderstorms remains at the Slight Risk level, with strong winds being the greatest hazard.

However, the chance of tornadoes, primarily projected below the New York-Pennsyvania border yesterday, has increased from under five percent in the region to under ten percent for an expanded area which now includes southern portions of New York Western Southern Tier counties, including Allegany, along the border.

It is noted that geographic lines outlined on the forecast maps accompanying this story can vary by as much as 25 miles and that severe weather actually experienced during the past 10 days in parts of Allegany and adjoining counties has been rated at both the Marginal and Slight risk levels.

Be Aware. Be Prepared. Stay Safe.TM and continue to monitor for weather updates.

Local weather component charts, which also include graphs of various weather aspects for a full week’s period as it progresses, may be obtained through the Impact-Based Decision Support Services (IDSS) website which can be found in our exclusive Allegany Hope Weather Resources, linked from the left column of this page, or at https://tinyurl.com/AH-Weather-Resources.

Information can be obtained for any community in the United States or its territories by using the Search feature at the top of that page. Other links provide access to Doppler radar which can be used for tracking storms and additional timely information.

Bookmarking appropriate NWS pages can help obtain quickly the most timely information on forecast changes.

Allegany Hope is a Weather-Ready Nation AmbassadorTM and, due to Allegany County’s location being in or bordering three NWS forecast offices, Allegany Hope Weather Resources provides forecast and other information from the NWS at Buffalo for Allegany County north and west, Binghamton for Steuben County east, and State College, Pa., for Potter and McKean counties in Pennsylvania, along with regional and national data.

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