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Public Information Statement
National Weather Service Buffalo NY
309 PM EDT Tue Jun 10 2025

...NWS Damage Survey for 06/09/2025 Tornado Event...

.Great Valley Tornado...

Rating:                 EF-1
Estimated Peak Wind:    110 mph
Path Length /statute/:  2.4 miles
Path Width /maximum/:   600 yards
Fatalities:             0
Injuries:               0

Start Date:             June 9, 2025
Start Time:             5:37 PM EDT
Start Location:         Town of Great Valley, Cattaraugus County
Start Lat/Lon:          42.228, -78.601

End Date:               June 9, 2025
End Time:               5:41 PM EDT
End Location:           Town of Humphrey, Cattaraugus County
End Lat/Lon:            42.256, -78.563

The National Weather Service in Buffalo investigated storm-
related damage from a rotating thunderstorm that affected the
area around Great Valley in Cattaraugus County on June 9. During
the event, radar signatures indicated debris from the storm had
lofted into the atmosphere. This allowed for radar confirmation
of a tornado. The National Weather Service storm survey team
investigated the damage in the area today and confirmed damage
consistent with an EF-1 tornado with estimated peak winds of
110 mph.

Damage from the tornado generally followed Sugartown Road and
Forks Creek. The initial touchdown and first damage occurred in
the area between U.S. Highway 219 and Farm Market Road and
continued northeast for approximately 2.4 miles. Initial damage
from the storm included some hardwood trees north of Highway 98
and some facade damage to homes immediately south of Highway 98.
Additional damage near initial touchdown included the loss of
the roof of a garage. As the tornado continued northeast,
damage quickly became more significant. Several homes, garages,
and structures near the intersection of Sugartown Road with
Farm Market Road, Haines Hollow Road, and Bonnie Way either
had the full loss of the structure, loss of significant
roofing material, or the loss of some of the walls in the upper
portion of the structure. The more modern construction fared
substantially better than the majority of the structures in
this area. Additionally, trees on the entire hillside north of
the intersection were entirely sheared off mid-trunk for
hundreds up yards uphill from the structures.

The tornadic damage continued northeast with a clearly-defined
path of damage across McGuan Road of sheared tree trunks and
sporadic structural damage to a few structures along the way.
Tree damage became less severe after this point with
intermittent tree damage continuing along the path until the
tornado dissipated near Forks Creek in the Town of Humphrey.

The National Weather Service extends our thanks to Cattaraugus
County Emergency Services and the Cattaraugus County Sheriff`s
Office for their assistance with today`s survey.


&&

EF Scale: The Enhanced Fujita Scale classifies tornadoes into the
following categories:

EF0.....65 to 85 mph
EF1.....86 to 110 mph
EF2.....111 to 135 mph
EF3.....136 to 165 mph
EF4.....166 to 200 mph
EF5.....>200 mph

NOTE:
The information in this statement is preliminary and subject to
change pending final review of the event and publication in NWS
Storm Data.

$$

Fries