083
WGUS76 KPDT 230146
FFSPDT
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PENDLETON OR
646 PM PDT TUE AUG 22 2023
ORC063-230215-
/O.CON.KPDT.FF.W.0012.000000T0000Z-230823T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WALLOWA OR-
646 PM PDT TUE AUG 22 2023
...FLASH FLOOD WARNING FOR THE NEBO BURN SCAR REMAINS IN EFFECT
UNTIL 715 PM PDT THIS EVENING FOR SOUTHERN WALLOWA COUNTY...
AT 646 PM PDT, DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY
RAIN OVER THE NEBO BURN SCAR. UP TO 0.5 INCHES OF RAIN HAVE FALLEN.
THE EXPECTED RAINFALL RATE IS 0.5 INCHES IN 1 HOUR. FLASH FLOODING
IS ONGOING OR EXPECTED TO BEGIN SHORTLY.
EXCESSIVE RAINFALL OVER THE BURN SCAR WILL RESULT IN DEBRIS FLOW
MOVING THROUGH THE NEBO BURN SCAR. THE DEBRIS FLOW CAN CONSIST OF
ROCK, MUD, VEGETATION AND OTHER LOOSE MATERIALS.
HAZARD...FLASH FLOODING CAUSED BY THUNDERSTORMS IN AND AROUND THE
NEBO BURN SCAR.
SOURCE...RADAR.
IMPACT...FLOODING OF AREAS IN AND AROUND THE NEBO BURN SCAR.
SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
MAINLY RURAL AREAS OF SOUTHERN WALLOWA COUNTY
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE AWAY FROM RECENTLY BURNED AREAS. LIFE-THREATENING FLOODING OF
CREEKS, ROADS AND NORMALLY DRY ARROYOS IS LIKELY. THE HEAVY RAINS
WILL LIKELY TRIGGER ROCKSLIDES, MUDSLIDES AND DEBRIS FLOWS IN STEEP
TERRAIN, ESPECIALLY IN AND AROUND THESE AREAS.
FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS, RIVERS, OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.
PLEASE REPORT OBSERVED FLOODING TO LOCAL EMERGENCY SERVICES OR LAW
ENFORCEMENT AND REQUEST THEY PASS THIS INFORMATION TO THE NATIONAL
WEATHER SERVICE WHEN YOU CAN DO SO SAFELY.
LAT...LON 4518 11715 4520 11714 4519 11710 4521 11709
4518 11706 4517 11707 4517 11709 4515 11709
4517 11706 4516 11706 4515 11707 4517 11705
4515 11704 4513 11706 4513 11704 4512 11704
4513 11712 4515 11713
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...0.5 INCHES IN 1 HOUR
CP
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