Flood Watch issued for parts of Eastern OR & WA

By on Saturday, August 19th, 2023 in Columbia Basin News More Top Stories

The National Weather Service has issued a flood watch for many parts of Oregon, Washington and Idaho today, calling for excessive rainfall and flooding Sunday night into Tuesday afternoon. See the agency’s full Flood Watch statements below:

(Flood Watches issued by the National Weather Service)

Flood Watch

National Weather Service Pendleton OR

119 PM PDT Sat Aug 19 2023

ORZ049-050-502-503-200700-

/O.NEW.KPDT.FA.A.0003.230821T1200Z-230823T0000Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

Grande Ronde Valley-Wallowa County-Northern Blue Mountains of Oregon-

Southern Blue Mountains of Oregon-

Including the cities of Meacham, Cove, Tollgate, Elgin, North

Powder, Union, Ukiah, Wallowa, Joseph, Long Creek, Enterprise, and

La Grande

119 PM PDT Sat Aug 19 2023

…FLOOD WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH TUESDAY

AFTERNOON…

* WHAT…Flooding caused by excessive rainfall is possible.

* WHERE…A portion of northeast Oregon, including the following

  areas, Grande Ronde Valley, Northern Blue Mountains of Oregon,

  Southern Blue Mountains of Oregon and Wallowa County.

* WHEN…From late Sunday night through Tuesday afternoon.

* IMPACTS…Excessive runoff may result in flooding of creeks,

  streams, and other low-lying and flood-prone locations like burn

  scars and areas of steep terrain. Flooding may occur in poor

  drainage and urban areas.

* ADDITIONAL DETAILS…

  – The remnants of Hurricane Hilary are forecast to impact

    northeastern Oregon Monday and Tuesday. Periods of moderate

    to heavy rainfall are possible, in addition to embedded

    thunderstorms, due to extremely high levels atmospheric

    moisture moving through the region.

  – http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS…

You should monitor later forecasts and be alert for possible Flood

Warnings. Those living in areas prone to flooding should be prepared

to take action should flooding develop.

&&

$$

ts


Flood Watch

National Weather Service Spokane WA

114 PM PDT Sat Aug 19 2023

IDC061-069-079-WAC003-201000-

/O.EXT.KOTX.FA.A.0012.230821T1200Z-230823T0000Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

Lewis-Nez Perce-Shoshone-Asotin-

Including the cities of Craigmont, Kamiah, Mohler, Nezperce,

Winchester, Lewiston, Culdesac, Gifford, Lapwai, Peck, Cataldo,

Kellogg, Kingston, Murray, Osburn, Pinehurst, Prichard, Calder,

Mullan, Smelterville, Wallace, Clarkston, Clarkston Heights,

Anatone, and Asotin

114 PM PDT Sat Aug 19 2023

…FLOOD WATCH NOW IN EFFECT FROM LATE SUNDAY NIGHT THROUGH TUESDAY

AFTERNOON…

* WHAT…Flooding caused by excessive rainfall continues to be

  possible.

* WHERE…Portions of Idaho, including the following counties,

  Lewis, Nez Perce and Shoshone. Portions of Southeast Washington,

  including the following county, Asotin.

* WHEN…From late Sunday night through Tuesday afternoon.

* IMPACTS…Excessive runoff may result in flooding of rivers,

  creeks, streams, and other low-lying and flood-prone locations.

  Flooding may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS…

  – High levels of atmospheric moisture associated with the

    remnants of Hurricane Hilary are forecast to impact the

    central and lower ID Panhandle and extreme southeast

    Washington. Periods of moderate to heavy rainfall are

    possible Monday and Tuesday, with enhanced rainfall rates due

    to embedded thunderstorms.

  – http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS…

You should monitor later forecasts and be alert for possible Flood

Warnings. Those living in areas prone to flooding should be prepared

to take action should flooding develop.

&&

$$

Butler


Flood Watch

National Weather Service Missoula MT

213 PM MDT Sat Aug 19 2023

IDZ006>010-202015-

/O.CON.KMSO.FA.A.0007.230820T1900Z-230822T0600Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

Southern Clearwater Mountains-Orofino/Grangeville Region-Lower

Hells Canyon/Salmon River Region-Western Lemhi County-Eastern

Lemhi County-

113 PM PDT Sat Aug 19 2023 /213 PM MDT Sat Aug 19 2023/

…FLOOD WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON THROUGH

MONDAY EVENING…

* WHAT…Flooding caused by excessive rainfall continues to be

  possible.

* WHERE…Portions of central and east central Idaho, including the

  following areas, in central Idaho, Lower Hells Canyon/Salmon River

  Region, Orofino/Grangeville Region and Southern Clearwater

  Mountains. In east central Idaho, Eastern Lemhi County and Western

  Lemhi County.

* WHEN…From Sunday afternoon through Monday evening.

* IMPACTS…Excessive runoff may result in flooding of creeks,

  streams, and other low-lying and flood-prone locations. Burn scars

  and flood prone areas will be at risk for rock, mudslide, debris

  flows. Creeks and streams may rise out of their banks. Flooding

  may occur in poor drainage and urban areas. Low-water crossings

  may be flooded.

* ADDITIONAL DETAILS…

  – High levels of atmospheric moisture associated with the

    remnants of Hurricane Hilary are forecast to impact north-

    central Idaho Sunday through Monday. Periods of moderate to

    heavy rainfall are possible both days, with enhanced rainfall

    rates due to embedded thunderstorms and warm rain processes.

  – https://www.weather.gov/mso/hydrology

$$


Flood Watch

National Weather Service Boise ID

1015 AM MDT Sat Aug 19 2023

IDZ011>016-028>030-033-ORZ061>064-200430-

/O.CON.KBOI.FA.A.0004.230820T1200Z-230822T0600Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

West Central Mountains-Lower Treasure Valley ID-Boise Mountains-

Upper Treasure Valley-Southwest Highlands-Western Magic Valley-

Camas Prairie-Owyhee Mountains-Southern Twin Falls County-Upper

Weiser River-Harney County-Baker County-Malheur County-Oregon

Lower Treasure Valley-

Including the cities of McCall, Cascade, Nampa, Caldwell, Idaho

City, Lowman, Garden Valley, Pine, Boise, Mountain Home,

Grasmere, Riddle, Murphy Hot Springs, Twin Falls, Jerome,

Fairfield, Silver City, Hollister, Rogerson, Council, Cambridge,

Midvale, Buchanan, Burns, Crane, Dunnean, New Princeton, Venator,

Diamond, Baker, Malheur City, Ontario, and Nyssa

1015 AM MDT Sat Aug 19 2023 /915 AM PDT Sat Aug 19 2023/

…FLOOD WATCH REMAINS IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY

EVENING…

* WHAT…Flash flooding caused by excessive rainfall continues to be

  possible.

* WHERE…Portions of Idaho, including the following areas, Boise

  Mountains, Camas Prairie, Lower Treasure Valley ID, Owyhee

  Mountains, Southern Twin Falls County, Southwest Highlands, Upper

  Treasure Valley, Upper Weiser River, West Central Mountains and

  Western Magic Valley. Portions of Oregon, including the following

  areas, Baker County, Harney County, Malheur County and Oregon

  Lower Treasure Valley.

* WHEN…From Sunday morning through Monday evening.

* IMPACTS…Excessive runoff may result in flooding of creeks,

  streams, and other low-lying and flood-prone locations like burn

  scars and areas of steep terrain. Flooding may occur in poor

  drainage and urban areas. Low-water crossings may be flooded.

  Storm drains and ditches may become clogged with debris. Extensive

  street flooding and flooding of creeks and rivers is possible.

* ADDITIONAL DETAILS…

  – A monsoon moisture surge Sunday followed by tropical moisture

    from the remnants of Hurricane Hilary Monday has increased

    confidence in the potential for flash flooding. The heaviest

    rainfall is expected Monday when Hilary`s moisture interacts

    with an incoming Pacific upper trough, producing rainfall

    rates as high as 3 inches per hour.

  – http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS…

You should monitor later forecasts and be prepared to take action

should Flash Flood Warnings be issued.

&&

$$

BOI