Public Information Statement
Issued by NWS Portland, OR

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Public Information Statement
National Weather Service Portland OR
107 PM PDT Fri Oct 13 2017

...TWO TORNADOES CONFIRMED ON OCTOBER 12TH 2017 ACROSS NORTHWEST
OREGON AND SOUTHWEST WASHINGTON...

.MT VISTA TORNADO

EF SCALE RATING:      EF0
ESTIMATED PEAK WIND:  60-65 MPH
PATH LENGTH (MI):     0.16 MI
PATH WIDTH (MAX):     25 yards
FATALITIES:           0
INJURIES:             0

START DATE:           10/12/2017
START TIME:           3:05 PM
START LOCATION:       MT VISTA WA
START LAT/LON:        45.726093/-122.639181

END DATE:             10/12/2017
END TIME:             3:06 PM
END LOCATION:         MT VISTA WA
END LAT/LON:          45.724110/-122.637620

SURVEY SUMMARY: The tornado started due north of the intersection of
NE 31st Ave and NE 144th St where a large oak tree lost several
large limbs and a fence was blown over. One limb was lofted up and
over the rooftop of the residence on the north end of NE 31st Ave.
However, no roof or other structural damage was noted. A large
Douglas Fir tree also sustained damage to the northeast of where NE
31st Ave turns to NE 143rd St. The damage path ended near the cul-de-
sac on NE 33rd Avenue. This included tree, fence and patio furniture
damage. In addition, a resident watched the condensation funnel lift
back into the cloud at this point.


.Aurora Airport Tornado

EF SCALE RATING:      EF0
ESTIMATED PEAK WIND:  65-70 MPH
PATH LENGTH (MI):     0.60 MI
PATH WIDTH (MAX):     50 yards
FATALITIES:           0
INJURIES:             0

START DATE:           10/12/2017
START TIME:           3:39 PM
START LOCATION:       2 NNW of Aurora
START LAT/LON:        45.255517/-122.777811

END DATE:             10/12/2017
END TIME:             3:40 PM
END LOCATION:         2 N of Aurora
END LAT/LON:          45.254035/-122.765317

SURVEY SUMMARY: The tornado started on Boones Ferry Rd NE, west of
the Aurora airport. Greenhouses in this area sustained damage and
the tornado continued to travel east across the airport property.
Two planes were flipped at Willamette Aviation Services. The tornado
ended near Airport Rd NE.

EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO
THE FOLLOWING CATEGORIES.

EF0...WEAK......65 TO 85 MPH
EF1...WEAK......86 TO 110 MPH
EF2...STRONG....111 TO 135 MPH
EF3...STRONG....136 TO 165 MPH
EF4...VIOLENT...166 TO 200 MPH
EF5...VIOLENT... > 200 MPH

NOTE: INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO
CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN NWS
STORM DATA.

$$

Bentley/Neuman



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