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AccuWeather Provides Most Advance Notice, Most Accurate Warning for Destructive Great Valley, New York Tornado

As a result, people and businesses relying on NWS warnings directly, or all other known weather sources that simply distribute NWS tornado warnings, had NO NOTICE of the imminent life-threatening emergency before the tornado touched down.

By AccuWeather For Business, Staff

Published Jun 13, 2025 7:59 AM EDT | Updated Jul 15, 2025 8:12 AM EDT

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>>Learn more about AccuWeather For Business

This drone video shows homes and farm buildings destroyed in the aftermath of a tornado-warned storm that tore through this area in Cattaraugus County, New York, on June 9.

On June 9, severe thunderstorms over southwestern New York produced a tornado that destroyed homes and property. AccuWeather was the ONLY known source to provide advance notice of this tornado.

• AccuWeather provided the most accurate and timely warning of a tornado during this event, including far more advance notice compared to the government’s National Weather Service (NWS) and all other known sources.

AccuWeather’s forecasts were once again more valuable and provided more impactful descriptions to people, communities and businesses, helping them better prepare and stay safer. AccuWeather’s more advance warnings benefited AccuWeather For Business SkyGuard® customers.

>> LEARN MORE about how AccuWeather's SkyGuard Severe Weather Warnings will help your business better prepare and keep your employees safer from tornadoes and all severe weather threats.

Some of the many such examples include:

In Great Valley, New York

• AccuWeather Expert Storm Warning meteorologists issued a lifesaving SkyGuard® Tornado Warning, which exclusively provided 37 minutes of precious advance notice BEFORE a rapidly developing EF1 tornado struck with peak winds of 110 mph.

• As has been the case with many other situations, AccuWeather was the ONLY known source to provide advance notice of the tornado. The NWS and all other known sources only issued a Tornado Warning for this storm AFTER the tornado was on the ground and doing damage. 

>> Learn more about AccuWeather’s Proven Superior AccuracyTM

As a result, people and businesses relying on NWS warnings directly, or all other known weather sources that simply distribute NWS tornado warnings, had NO NOTICE of the imminent life-threatening emergency before the tornado touched down.

Government cell phone alerting (wireless emergency alerts) would not have been triggered, outdoor sirens would not have been activated, and other emergency notifications from other agencies may not have been issued, as those notification methods depend upon National Weather Service warnings. Only those systems based on AccuWeather Warnings, including National Weather Service warnings but supplemented by the expertise of AccuWeather's Expert Storm Warning meteorologists, would have been activated.

More than 100 times every year, AccuWeather has been documented as providing more accurate, more advanced notifications of significant and extreme weather events that impact businesses and threaten the health, welfare and lives of individuals. AccuWeather has proven to be the most accurate source of weather forecasts and warnings. 

This is an additional example of the many weather events where AccuWeather provided forecasts with proven Superior AccuracyTM and impact descriptions helping people, communities and businesses, to better prepare and stay safer.

LEARN MORE about how AccuWeather's SkyGuard Severe Weather Warnings will help your business better prepare and keep your employees safer from tornadoes and all severe weather threats.

Related:

AccuWeather Provided Critical Advance Warning Before an EF3 Tornado in Illinois, Helping Nucor Steel Take Action, Protect Workers and Avoid Disaster
AccuWeather Provides the Best, Earliest and Most Actionable Warnings for Damaging Tornadoes in Oklahoma
AccuWeather’s Snow Warning Service Provided Customers Earliest and Most Accurate Warnings During the 2025-2026 Winter Season
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AccuWeather AccuWeather Provides Most Advance Notice, Most Accurate Warning for Destructive Great Valley, New York Tornado
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