Alert archive / Washington / River Flood Warnings in 2018

River Flood Warning 10, NWS Spokane, WA

May 8, 2018Chelan County, Washington

NWS Spokane, WA issued this river flood warning at May 8, 2018, 11:23 AM PDT for Chelan County, Washington. It took effect at May 8, 2018, 10:25 PM PDT. It was in force for 51 hr.

The area

The outline as issued.

The facts

Issued
May 8, 2018, 11:23 AM PDT (18:23 UTC)
In effect from
May 8, 2018, 10:25 PM PDT
Expired
May 11, 2018, 1:27 AM PDT
In force
51 hr
Issued by
NWS Spokane, WA
Area
Storm-based polygon
Flood severity
Minor

County Chelan County, WA

The radar

The Seattle radar (KATX), 127 km from the middle of the area, began a volume at 18:24 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Stehekin River at Stehekin (STHW1). The gauge peaked at 24.33 ft at May 9, 2018, 9:00 AM PDT.

actionminor20222405/0805/0905/1005/1105/12
Action stage
19.5 ft
Minor stage
20.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12451000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

The text

As transmitted.

884 
WGUS46 KOTX 081823
FLWOTX
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Spokane, WA
1123 AM PDT Tue May 8 2018

...The National Weather Service in Spokane has issued a flood warning
for the following rivers and lakes in Washington...

  Methow River near Pateros AFFECTING Okanogan County
  Similkameen River near Nighthawk AFFECTING Okanogan County
  Stehekin River at Stehekin AFFECTING Chelan County

...Continued snow melt from warm temperatures today combined with rain
tonight will push the Methow...Similkameen...and Stehekin Rivers above 
flood stage...

WAC047-090621-
/O.NEW.KOTX.FL.W.0008.180509T1105Z-000000T0000Z/
/NITW1.2.SM.180509T1105Z.180511T1800Z.000000T0000Z.NO/
1123 AM PDT Tue May 8 2018

The National Weather Service in Spokane, WA has issued a 

* Flood Warning for 
  The Similkameen River near Nighthawk.
* from late tonight until further notice.
* At 10:30 AM Tuesday the stage was 13.57 feet.
* Flood stage is 14.00 feet.
* Moderate flooding is forecast.
* Forecast...Rise above flood stage by early tomorrow and continue to
  rise to near 15.3 feet by late Friday morning.
* At  13.0 feet...The Similkameen River will begin to back up into 
  Palmer Lake and water will be a few inches deep over Chopaka Road. 
  Low-lying pastures and agricultural land around Chopaka and 
  Allemandi Roads will be flooded. Water will begin to encroach on 
  farm land just downstream of the Nighthawk bridge.

&&

LAT...LON 4885 11957 4889 11982 4900 11980 4900 11943 4890 11947


$$

WAC047-090621-
/O.NEW.KOTX.FL.W.0009.180509T1146Z-000000T0000Z/
/PATW1.1.SM.180509T1146Z.180510T1800Z.000000T0000Z.NR/
1123 AM PDT Tue May 8 2018

The National Weather Service in Spokane, WA has issued a 

* Flood Warning for 
  The Methow River near Pateros.
* from late tonight until further notice.
* At 10:15 AM Tuesday the stage was  9.43 feet.
* Flood stage is 10.00 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage by early tomorrow and continue to
  rise to near 10.8 feet by late Thursday morning.
* At  12.0 feet...Significant flooding is likely throughout the Methow
  Valley from Mazama to Pateros.
* At  10.0 feet...Minor flooding of adjacent roads and low-lying areas
  is likely throughout the Methow Valley from Mazama to Pateros.

&&

LAT...LON 4805 11984 4800 11988 4819 12015 4824 12006 4808 11989


$$

WAC007-090621-
/O.NEW.KOTX.FL.W.0010.180509T0525Z-000000T0000Z/
/STHW1.1.SM.180509T0525Z.180510T1200Z.000000T0000Z.NO/
1123 AM PDT Tue May 8 2018

The National Weather Service in Spokane, WA has issued a 

* Flood Warning for 
  The Stehekin River at Stehekin.
* from this evening until further notice.
* At 10:30 AM Tuesday the stage was 23.09 feet.
* Flood stage is 24.00 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage tonight and continue to rise 
  to near 25.2 feet by Thursday morning.
* At  24.0 feet...The River may be out of its banks in spots and onto 
  the Stehekin Valley Road and Company Creek Road.
* At  23.8 feet...McGregor's Meadow Road will be mostly flooded. 
* At  23.5 feet...Some water may be over McGregor Meadows Road and the
  drive through the Tollber pasture. Part of the Harlequin Campground
  may be flooded. 

&&

LAT...LON 4849 12076 4832 12057 4825 12067 4831 12101 4848 12103


$$
4 follow-up statements
160 
WGUS86 KOTX 081931
FLSOTX
Flood Statement
National Weather Service Spokane, WA
1231 PM PDT Tue May 8 2018

...The flood warning continues for the following rivers in 
Washington...Idaho...

  Methow River near Pateros AFFECTING Okanogan County
  Similkameen River near Nighthawk AFFECTING Okanogan County
  Stehekin River at Stehekin AFFECTING Chelan County
  St Joe River at St Maries AFFECTING Benewah County
  Kettle River near Ferry above Curlew AFFECTING Ferry County
  Moyie River at Eastport AFFECTING Boundary County
  Okanogan River near Tonasket AFFECTING Okanogan County

The combination of melting snow plus additional rainfall
on Wednesday and Thursday will lead to continued flood levels
on these rivers across eastern Washington and north Idaho.


WAC019-091930-
/O.CON.KOTX.FL.W.0005.000000T0000Z-000000T0000Z/
/FRYW1.3.SM.000000T0000Z.180511T0600Z.000000T0000Z.NR/
1231 PM PDT Tue May 8 2018

The Flood Warning continues for
  The Kettle River near Ferry above Curlew.
* until further notice.
* At 11:15 AM Tuesday the stage was 19.67 feet.
* Flood stage is 18.50 feet.
* Moderate flooding is occurring and Major flooding is forecast.
* Forecast...The river is expected to continue to rise to near 20.8 
  feet by Thursday evening and then begin falling.
* At  20.8 feet...Water will be covering part of Highway 21 near the 
  intersection with Little Goosmus Creek Road.
* At  19.0 feet...Flooding at Beal Park on West Kettle River Road, 
  west of Curlew. 'Ol Swimming Hole Park in Curlew will be inundated.
  Flooding of yards and outbuildings along the river from the 
  Canadian border through Curlew on both sides of the river. Some 
  driveways on Kettle River Road will be flooded. Water will be over 
  Customs Road near Riverview Lane.
* At  18.5 feet...Flooding begins on Customs Road near mile post 6.
* At  18.3 feet...Minor flooding will occur in the 'Ol Swimming Hole 
  County Park in Curlew.

&&

LAT...LON 4900 11888 4898 11841 4882 11843 4886 11880 4900 11888


$$

WAC047-091930-
/O.CON.KOTX.FL.W.0002.000000T0000Z-000000T0000Z/
/TONW1.3.SM.180505T1430Z.180512T1200Z.000000T0000Z.NO/
1231 PM PDT Tue May 8 2018

The Flood Warning continues for
  The Okanogan River near Tonasket.
* until further notice.
* At 11:15 AM Tuesday the stage was 17.34 feet.
* Flood stage is 15.00 feet.
* Moderate flooding is occurring and Major flooding is forecast.
* Forecast...The river is expected to continue to rise to near 20.1 
  feet by Saturday morning.  The river will then slowly fall but
  remaining above major flood stage levels through next week.
* At  22.0 feet...Severe flooding of surrounding cropland is likely. 
  Damage is possible to numerous homes, outbuildings, irrigation 
  systems and roads adjacent to the river. Water will be over Highway
  97 near Cordell and other areas between Tonasket and Oroville.  
* At  18.0 feet...Major flooding of surrounding cropland is likely. 
  Some homes and buildings adjacent to the river will experience some
  basement and first floor flooding.
* At  17.0 feet...Low lying fields and pasture land in the flood plain
  along the Okanogan river valley, from Oroville to Okanogan, will be
  flooded. Some homes near the river in Okanogan may experience some 
  basement flooding from seepage. Water will be between the railroad 
  and Highway 97 near Cordell, south of Oroville. Water will be 
  against the shoulder of Omak River Road across from Wanacut Creek.
* At  16.0 feet...Pasture land between Rodeo Track Road and Benton 
  Street, on the east side of the river near Omak, will begin to 
  flood. 
* At  15.0 feet...Minor flooding of low-lying areas is likely between 
  Oroville and Tonasket.


&&

LAT...LON 4895 11945 4893 11932 4825 11951 4832 11968 4895 11945


$$

WAC047-091930-
/O.EXT.KOTX.FL.W.0008.180509T1105Z-000000T0000Z/
/NITW1.2.SM.180509T1105Z.180511T1800Z.000000T0000Z.NO/
1231 PM PDT Tue May 8 2018

...Flood Warning now in effect until further notice...
The Flood Warning continues for
  The Similkameen River near Nighthawk.
* from late tonight until further notice.
* At 11:30 AM Tuesday the stage was 13.61 feet.
* Flood stage is 14.00 feet.
* Moderate flooding is forecast.
* Forecast...Rise above flood stage by early tomorrow and continue to
  rise to near 15.3 feet by late Friday morning.
* At  13.0 feet...The Similkameen River will begin to back up into 
  Palmer Lake and water will be a few inches deep over Chopaka Road. 
  Low-lying pastures and agricultural land around Chopaka and 
  Allemandi Roads will be flooded. Water will begin to encroach on 
  farm land just downstream of the Nighthawk bridge.

&&

LAT...LON 4885 11957 4889 11982 4900 11980 4900 11943 4890 11947


$$

WAC047-091930-
/O.EXT.KOTX.FL.W.0009.180509T1146Z-000000T0000Z/
/PATW1.1.SM.180509T1146Z.180510T1800Z.000000T0000Z.NR/
1231 PM PDT Tue May 8 2018

...Flood Warning now in effect until further notice...
The Flood Warning continues for
  The Methow River near Pateros.
* from late tonight until further notice.
* At 11:15 AM Tuesday the stage was  9.45 feet.
* Flood stage is 10.00 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage by early tomorrow and continue to
  rise to near 10.8 feet by late Thursday morning.
* At  12.0 feet...Significant flooding is likely throughout the Methow
  Valley from Mazama to Pateros.
* At  10.0 feet...Minor flooding of adjacent roads and low-lying areas
  is likely throughout the Methow Valley from Mazama to Pateros.

&&

LAT...LON 4805 11984 4800 11988 4819 12015 4824 12006 4808 11989


$$

IDC021-091930-
/O.CON.KOTX.FL.W.0006.000000T0000Z-000000T0000Z/
/EASI1.1.SM.180508T0507Z.180511T1200Z.000000T0000Z.NR/
1231 PM PDT Tue May 8 2018

The Flood Warning continues for
  The Moyie River at Eastport.
* until further notice.
* At 11:45 AM Tuesday the stage was  9.17 feet.
* Flood stage is  9.00 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river is expected to continue to rise to near 9.7 
  feet by Friday morning...then begin falling but remaining above 
  flood stage through next week.
* At  10.0 feet...Several homes are flooded on U.S. 95 south of 
  Eastport. Flooding occurs on portions of Meadow Creek Road between 
  Eastport and Meadow Creek.
* At   9.9 feet...Water enters basements of government housing on U.S.
  95...just south of the Canadian Border. 
* At   9.0 feet...Lowland flooding occurs between Eastport and Addie.


&&

LAT...LON 4902 11627 4901 11609 4871 11610 4872 11622 4902 11627


$$

WAC007-091930-
/O.EXT.KOTX.FL.W.0010.180509T0525Z-000000T0000Z/
/STHW1.1.SM.180509T0525Z.180510T1200Z.000000T0000Z.NO/
1231 PM PDT Tue May 8 2018

...Flood Warning now in effect until further notice...
The Flood Warning continues for
  The Stehekin River at Stehekin.
* from this evening until further notice.
* At 11:30 AM Tuesday the stage was 23.00 feet.
* Flood stage is 24.00 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage tonight and continue to rise 
  to near 25.2 feet by Thursday morning.
* At  24.0 feet...The River may be out of its banks in spots and onto 
  the Stehekin Valley Road and Company Creek Road.
* At  23.8 feet...McGregor's Meadow Road will be mostly flooded. 
* At  23.5 feet...Some water may be over McGregor Meadows Road and the
  drive through the Tollber pasture. Part of the Harlequin Campground
  may be flooded. 


&&

LAT...LON 4849 12076 4832 12057 4825 12067 4831 12101 4848 12103


$$

IDC009-091930-
/O.EXT.KOTX.FL.W.0003.000000T0000Z-000000T0000Z/
/SJMI1.1.SM.180508T0845Z.180511T1200Z.000000T0000Z.NO/
1231 PM PDT Tue May 8 2018

...Flood Warning now in effect until further notice...
The Flood Warning continues for
  The St Joe River at St Maries.
* until further notice.
* At 11:30 AM Tuesday the stage was 32.86 feet.
* Flood stage is 32.50 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river is expected to continue to rise to near 33.9 
  feet by Friday morning...then begin falling.
* At  35.0 feet...Water will be up to Aqua Avenue in St Maries.
* At  33.0 feet...Water may be over St Joe City Road.
* At  32.5 feet...Minor flooding will occur throughout the low lying 
  areas of the St Joe Valley. Water will be observed behind levees 
  due to seepage. Minor flooding of the Aqua Park along the river's 
  edge. Outbuildings along the river that are not behind levees may 
  be flooded.


&&

LAT...LON 4701 11627 4717 11663 4728 11668 4740 11665 4735 11632


$$
346 
WGUS86 KOTX 091244
FLSOTX
Flood Statement
National Weather Service Spokane, WA
544 AM PDT Wed May 9 2018

...The flood warning continues for the following rivers and lakes in 
Washington...Idaho...
  Kettle River near Ferry above Curlew AFFECTING Ferry County
  Methow River near Pateros AFFECTING Okanogan County
  Moyie River at Eastport AFFECTING Boundary County
  Okanogan River near Tonasket AFFECTING Okanogan County
  Similkameen River near Nighthawk AFFECTING Okanogan County
  Stehekin River at Stehekin AFFECTING Chelan County
  St Joe River at St Maries AFFECTING Benewah County

The combination of melting snow plus additional rainfall
on Wednesday and Thursday will lead to continued flood levels
on these rivers across eastern Washington and north Idaho.


WAC019-101244-
/O.CON.KOTX.FL.W.0005.000000T0000Z-000000T0000Z/
/FRYW1.3.SM.000000T0000Z.180511T1800Z.000000T0000Z.NR/
544 AM PDT Wed May 9 2018

The Flood Warning continues for
  The Kettle River near Ferry above Curlew.
* until further notice.
* At  4:15 AM Wednesday the stage was 19.89 feet.
* Flood stage is 18.50 feet.
* Moderate flooding is occurring and Major flooding is forecast.
* Forecast...The river is expected to continue to rise to near 21.1 
  feet by late Friday morning (5/11)...then begin slowly falling.
* At  20.8 feet...Water will be covering part of Highway 21 near the 
  intersection with Little Goosmus Creek Road.
* At  19.0 feet...Flooding at Beal Park on West Kettle River Road, 
  west of Curlew. 'Ol Swimming Hole Park in Curlew will be inundated.
  Flooding of yards and outbuildings along the river from the 
  Canadian border through Curlew on both sides of the river. Some 
  driveways on Kettle River Road will be flooded. Water will be over 
  Customs Road near Riverview Lane.
* At  18.5 feet...Flooding begins on Customs Road near mile post 6.
* At  18.3 feet...Minor flooding will occur in the 'Ol Swimming Hole 
  County Park in Curlew.

&&

LAT...LON 4900 11888 4898 11841 4882 11843 4886 11880 4900 11888


$$

WAC047-101244-
/O.CON.KOTX.FL.W.0002.000000T0000Z-000000T0000Z/
/TONW1.3.SM.180505T1430Z.180513T0000Z.000000T0000Z.NO/
544 AM PDT Wed May 9 2018

The Flood Warning continues for
  The Okanogan River near Tonasket.
* until further notice.
* At  4:15 AM Wednesday the stage was 17.83 feet.
* Flood stage is 15.00 feet.
* Moderate flooding is occurring and Major flooding is likely.
* Forecast...The river is expected to continue to rise to near 20.3 
  feet by Saturday afternoon (5/12) and remain in major flood between 19.5 and 
  20.0 ft through next week. 
* At  22.0 feet...Severe flooding of surrounding cropland is likely. 
  Damage is possible to numerous homes, outbuildings, irrigation 
  systems and roads adjacent to the river. Water will be over Highway
  97 near Cordell and other areas between Tonasket and Oroville.  
* At  18.0 feet...Major flooding of surrounding cropland is likely. 
  Some homes and buildings adjacent to the river will experience some
  basement and first floor flooding.
* At  17.0 feet...Low lying fields and pasture land in the flood plain
  along the Okanogan river valley, from Oroville to Okanogan, will be
  flooded. Some homes near the river in Okanogan may experience some 
  basement flooding from seepage. Water will be between the railroad 
  and Highway 97 near Cordell, south of Oroville. Water will be 
  against the shoulder of Omak River Road across from Wanacut Creek.
* At  16.0 feet...Pasture land between Rodeo Track Road and Benton 
  Street, on the east side of the river near Omak, will begin to 
  flood. 
* At  15.0 feet...Minor flooding of low-lying areas is likely between 
  Oroville and Tonasket.


&&

LAT...LON 4895 11945 4893 11932 4825 11951 4832 11968 4895 11945


$$

IDC021-101244-
/O.CON.KOTX.FL.W.0006.000000T0000Z-000000T0000Z/
/EASI1.2.SM.180508T0507Z.180511T1200Z.000000T0000Z.NR/
544 AM PDT Wed May 9 2018

The Flood Warning continues for
  The Moyie River at Eastport.
* until further notice.
* At  4:45 AM Wednesday the stage was  9.39 feet.
* Flood stage is  9.00 feet.
* Minor flooding is occurring and Moderate flooding is forecast.
* Forecast...The river is expected to continue to rise to near 
  moderate flood stage 10.0 feet by Friday morning (5/11) ...Then 
  begin to slowly fall.
* At  10.0 feet...Several homes are flooded on U.S. 95 south of 
  Eastport. Flooding occurs on portions of Meadow Creek Road between 
  Eastport and Meadow Creek.
* At   9.9 feet...Water enters basements of government housing on U.S.
  95...just south of the Canadian Border. 
* At   9.0 feet...Lowland flooding occurs between Eastport and Addie.


&&

LAT...LON 4902 11627 4901 11609 4871 11610 4872 11622 4902 11627


$$

WAC047-101244-
/O.CON.KOTX.FL.W.0008.000000T0000Z-000000T0000Z/
/NITW1.2.SM.180509T0400Z.180511T1800Z.000000T0000Z.NO/
544 AM PDT Wed May 9 2018

The Flood Warning continues for
  The Similkameen River near Nighthawk.
* until further notice.
* At  4:30 AM Wednesday the stage was 14.24 feet.
* Flood stage is 14.00 feet.
* Minor flooding is occurring and Moderate flooding is forecast.
* Forecast...The river is expected to continue to rise to near 15.5 
  feet by late Friday morning (5/11)...Then remain near moderate flood 
  stage of 15.0 feet through next week.
* At  13.0 feet...The Similkameen River will begin to back up into 
  Palmer Lake and water will be a few inches deep over Chopaka Road. 
  Low-lying pastures and agricultural land around Chopaka and 
  Allemandi Roads will be flooded. Water will begin to encroach on 
  farm land just downstream of the Nighthawk bridge.

&&

LAT...LON 4885 11957 4889 11982 4900 11980 4900 11943 4890 11947


$$

WAC047-101244-
/O.CON.KOTX.FL.W.0009.000000T0000Z-000000T0000Z/
/PATW1.1.SM.180510T0906Z.180510T1800Z.000000T0000Z.NR/
544 AM PDT Wed May 9 2018

The Flood Warning continues for
  The Methow River near Pateros.
* until further notice.
* At  4:15 AM Wednesday the stage was  9.39 feet.
* Flood stage is 10.00 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage after midnight May 10th
  and continue to rise to near 10.4 feet Thursday afternoon (05/10).
* At  12.0 feet...Significant flooding is likely throughout the Methow
  Valley from Mazama to Pateros.
* At  10.0 feet...Minor flooding of adjacent roads and low-lying areas
  is likely throughout the Methow Valley from Mazama to Pateros.

&&

LAT...LON 4805 11984 4800 11988 4819 12015 4824 12006 4808 11989


$$

WAC007-101244-
/O.CON.KOTX.FL.W.0010.000000T0000Z-000000T0000Z/
/STHW1.1.SM.180509T1410Z.180510T1200Z.000000T0000Z.NO/
544 AM PDT Wed May 9 2018

The Flood Warning continues for
  The Stehekin River at Stehekin.
* until further notice.
* At  4:30 AM Wednesday the stage was 23.83 feet.
* Flood stage is 24.00 feet.
* Minor flooding is forecast.
* Forecast...Rise above minor flood stage by this morning (5/9) and continue 
  to rise to near 25.2 feet by early Thursday (5/10).
* At  24.0 feet...The River may be out of its banks in spots and onto 
  the Stehekin Valley Road and Company Creek Road.
* At  23.8 feet...McGregor's Meadow Road will be mostly flooded. 
* At  23.5 feet...Some water may be over McGregor Meadows Road and the
  drive through the Tollber pasture. Part of the Harlequin Campground
  may be flooded. 


&&

LAT...LON 4849 12076 4832 12057 4825 12067 4831 12101 4848 12103


$$

IDC009-101244-
/O.CON.KOTX.FL.W.0003.000000T0000Z-000000T0000Z/
/SJMI1.1.SM.180508T0845Z.180511T0600Z.000000T0000Z.NO/
544 AM PDT Wed May 9 2018

The Flood Warning continues for
  The St Joe River at St Maries.
* until further notice.
* At  4:30 AM Wednesday the stage was 32.94 feet.
* Flood stage is 32.50 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river is expected to continue to rise to near 34.1 
  feet by Thursday (5/10) late evening ...Then begin slowly falling.
* At  36.0 feet...Extensive lowland flooding is likely. Some sections 
  of the St Joe River Road may be inundated. Water will approach the 
  flood gates in the levee at the Aqua Park.
* At  35.0 feet...Water will be up to Aqua Avenue in St Maries.
* At  33.0 feet...Water may be over St Joe City Road.
* At  32.5 feet...Minor flooding will occur throughout the low lying 
  areas of the St Joe Valley. Water will be observed behind levees 
  due to seepage. Minor flooding of the Aqua Park along the river's 
  edge. Outbuildings along the river that are not behind levees may 
  be flooded.

&&

LAT...LON 4701 11627 4717 11663 4728 11668 4740 11665 4735 11632


$$
847 
WGUS86 KOTX 092229
FLSOTX
Flood Statement
National Weather Service Spokane, WA
329 PM PDT Wed May 9 2018

...The flood warning continues for the following rivers and lakes in 
Idaho...Washington...
  Moyie River at Eastport AFFECTING Boundary County
  Okanogan River near Tonasket AFFECTING Okanogan County
  Similkameen River near Nighthawk AFFECTING Okanogan County
  St Joe River at St Maries AFFECTING Benewah County
  Methow River near Pateros AFFECTING Okanogan County
  Stehekin River at Stehekin AFFECTING Chelan County

The combination of melting snow plus additional rainfall
on Wednesday and Thursday will lead to continued flood levels
on these rivers across eastern Washington and north Idaho. Some 
rivers will rise to near record levels.

WAC047-102229-
/O.CON.KOTX.FL.W.0002.000000T0000Z-000000T0000Z/
/TONW1.3.SM.180505T1430Z.180512T1200Z.000000T0000Z.NO/
329 PM PDT Wed May 9 2018

The Flood Warning continues for
  The Okanogan River near Tonasket.
* until further notice.
* At 2:15 PM Wednesday the stage was 18.15 feet.
* Flood stage is 15.00 feet.
* Major flooding is occurring.
* Forecast...The river is expected to continue to rise to near 20.0 
  feet by Saturday morning, which would be a higher stage than has 
  been seen since 1972 when it reached it's record crest of 22.54 
  feet. The river will remain above its major flood stage of 18 feet 
  to between 19 and 20 feet through next week. 
* At  19.0 feet...Water may be into homes along the river in and near 
  Tonasket. 
* At  18.0 feet...Water will be approaching homes along the river in 
  and near Tonasket. Major flooding of surrounding cropland is 
  likely. Some homes and buildings adjacent to the river will 
  experience some basement and first floor flooding.
* At  17.0 feet...Low lying fields and pasture land in the flood plain
  along the Okanogan river valley, from Oroville to Okanogan, will be
  flooded. Some homes near the river in Okanogan may experience some 
  basement flooding from seepage. Water will be between the railroad 
  and Highway 97 near Cordell, south of Oroville. Water will be 
  against the shoulder of Omak River Road across from Wanacut Creek.
* At  16.0 feet...Pasture land between Rodeo Track Road and Benton 
  Street, on the east side of the river near Omak, will begin to 
  flood. 
* At  15.0 feet...Minor flooding of low-lying areas is likely between 
  Oroville and Tonasket.


&&

LAT...LON 4895 11945 4893 11932 4825 11951 4832 11968 4895 11945


$$

WAC047-102229-
/O.CON.KOTX.FL.W.0008.000000T0000Z-000000T0000Z/
/NITW1.2.SM.180509T0400Z.180511T1200Z.000000T0000Z.NO/
329 PM PDT Wed May 9 2018

The Flood Warning continues for
  The Similkameen River near Nighthawk.
* until further notice.
* At 2:30 PM Wednesday the stage was 14.43 feet.
* Flood stage is 14.00 feet.
* Minor flooding is occurring and Moderate flooding is forecast.
* Forecast...The river is expected to continue to rise to near 15.4 
  feet by Friday morning, which would be a higher stage than 
  has been seen since 1974. The river is forecast to remain between 
  14 and 15 feet through next week.
* At  14.2 feet...Water may begin to come over Loomis-Oroville road on
  the south end of Palmer Lake.  
* At  13.0 feet...The Similkameen River will begin to back up into 
  Palmer Lake and water will be a few inches deep over Chopaka Road. 
  Low-lying pastures and agricultural land around Chopaka and 
  Allemandi Roads will be flooded. Water will begin to encroach on 
  farm land just downstream of the Nighthawk bridge.

&&

LAT...LON 4885 11957 4889 11982 4900 11980 4900 11943 4890 11947


$$

WAC047-102229-
/O.EXT.KOTX.FL.W.0009.000000T0000Z-180511T1536Z/
/PATW1.1.SM.180509T2139Z.180510T1800Z.180511T0336Z.NR/
329 PM PDT Wed May 9 2018

...Flood Warning now in effect until Friday morning...
The Flood Warning continues for
  The Methow River near Pateros.
* until Friday morning.
* At 2:15 PM Wednesday the stage was  9.97 feet.
* Flood stage is 10.00 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage by Wednesday afternoon and 
  continue to rise to near 10.3 feet Thursday late morning. The 
  river is forecast to fall below flood stage by Thursday evening.
* At  10.0 feet...Minor flooding of adjacent roads and low-lying areas
  is likely throughout the Methow Valley from Mazama to Pateros.

&&

LAT...LON 4805 11984 4800 11988 4819 12015 4824 12006 4808 11989


$$

IDC021-102229-
/O.CON.KOTX.FL.W.0006.000000T0000Z-000000T0000Z/
/EASI1.1.SM.180508T0507Z.180511T0600Z.000000T0000Z.NR/
329 PM PDT Wed May 9 2018

The Flood Warning continues for
  The Moyie River at Eastport.
* until further notice.
* At 2:45 PM Wednesday the stage was 9.15 feet.
* Flood stage is  9.00 feet.
* Minor flooding is occurring.
* Forecast...The river is expected to continue to rise to near 9.6 
  feet by Wednesday night, which would be a higher stage than has 
  been seen since 2008.
* At   9.9 feet...Water enters basements of government housing on U.S.
  95...just south of the Canadian Border. 
* At   9.0 feet...Lowland flooding occurs between Eastport and Addie.


&&

LAT...LON 4902 11627 4901 11609 4871 11610 4872 11622 4902 11627


$$

WAC007-102229-
/O.EXT.KOTX.FL.W.0010.000000T0000Z-180511T1523Z/
/STHW1.1.SM.180509T2036Z.180510T0600Z.180511T0323Z.NO/
329 PM PDT Wed May 9 2018

...Flood Warning now in effect until Friday morning...
The Flood Warning continues for
  The Stehekin River at Stehekin.
* until Friday morning.
* At 2:30 PM Wednesday the stage was 23.93 feet.
* Flood stage is 24.00 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage by Wednesday afternoon and 
  continue to rise to near 24.7 feet by Wednesday night. The river 
  is forecast to fall below flood stage by Thursday evening.
* At  24.0 feet...The River may be out of its banks in spots and onto 
  the Stehekin Valley Road and Company Creek Road.
* At  23.8 feet...McGregor's Meadow Road will be mostly flooded. 
* At  23.5 feet...Some water may be over McGregor Meadows Road and the
  drive through the Tollber pasture. Part of the Harlequin Campground
  may be flooded. 


&&

LAT...LON 4849 12076 4832 12057 4825 12067 4831 12101 4848 12103


$$

IDC009-102229-
/O.CON.KOTX.FL.W.0003.000000T0000Z-000000T0000Z/
/SJMI1.1.SM.180508T0845Z.180511T0000Z.000000T0000Z.NO/
329 PM PDT Wed May 9 2018

The Flood Warning continues for
  The St Joe River at St Maries.
* until further notice.
* At 2:30 PM Wednesday the stage was 32.96 feet.
* Flood stage is 32.50 feet.
* Minor flooding is occurring.
* Forecast...The river is expected to continue to rise to near 33.4 
  feet by Thursday afternoon...Then begin falling.
* At  33.0 feet...Water may be over St Joe City Road.
* At  32.5 feet...Minor flooding will occur throughout the low lying 
  areas of the St Joe Valley. Water will be observed behind levees 
  due to seepage. Minor flooding of the Aqua Park along the river's 
  edge. Outbuildings along the river that are not behind levees may 
  be flooded.


&&

LAT...LON 4701 11627 4717 11663 4728 11668 4740 11665 4735 11632


$$
598 
WGUS86 KOTX 100338
FLSOTX
Flood Statement
National Weather Service Spokane, WA
838 PM PDT Wed May 9 2018

...The flood warning continues for the following rivers and lakes in 
Washington and Idaho...

  Methow River near Pateros AFFECTING Okanogan County
  Stehekin River at Stehekin AFFECTING Chelan County
  Kettle River near Ferry above Curlew AFFECTING Ferry County
  Moyie River at Eastport AFFECTING Boundary County
  Okanogan River near Tonasket AFFECTING Okanogan County
  Similkameen River near Nighthawk AFFECTING Okanogan County
  St Joe River at St Maries AFFECTING Benewah County

The combination of melting snow plus rainfall will lead to 
continued flood levels on these rivers across Eastern 
Washington and North Idaho. Some rivers will rise to near 
record levels.


WAC019-110338-
/O.CON.KOTX.FL.W.0005.000000T0000Z-000000T0000Z/
/FRYW1.3.SM.000000T0000Z.180511T1200Z.000000T0000Z.NR/
838 PM PDT Wed May 9 2018

The Flood Warning continues for
  The Kettle River near Ferry above Curlew.
* until further notice.
* At  7:15 PM Wednesday the stage was 20.51 feet.
* Flood stage is 18.50 feet.
* Major flooding is occurring and Record flooding is forecast.
* Forecast...The river is expected to continue to rise to near 21.3 
  feet by Friday morning, which would exceed the previous record 
  crest of 21.1 that was set in 1948.
* At  20.8 feet...Water will be covering part of Highway 21 near the 
  intersection with Little Goosmus Creek Road.
* At  19.0 feet...Flooding at Beal Park on West Kettle River Road, 
  west of Curlew. 'Ol Swimming Hole Park in Curlew will be inundated.
  Flooding of yards and outbuildings along the river from the 
  Canadian border through Curlew on both sides of the river. Some 
  driveways on Kettle River Road will be flooded. Water will be over 
  Customs Road near Riverview Lane.
* At  18.5 feet...Flooding begins on Customs Road near mile post 6.
* At  18.3 feet...Minor flooding will occur in the 'Ol Swimming Hole 
  County Park in Curlew.

&&

LAT...LON 4900 11888 4898 11841 4882 11843 4886 11880 4900 11888


$$

WAC047-110338-
/O.CON.KOTX.FL.W.0002.000000T0000Z-000000T0000Z/
/TONW1.3.SM.180505T1430Z.180512T1200Z.000000T0000Z.NO/
838 PM PDT Wed May 9 2018

The Flood Warning continues for
  The Okanogan River near Tonasket.
* until further notice.
* At  7:15 PM Wednesday the stage was 18.33 feet.
* Flood stage is 15.00 feet.
* Major flooding is occurring.
* Forecast...The river is expected to crest near 20.0 
  feet by Saturday morning, which would be a higher stage than
  has been sceen since 1972 when it reached its record crest of 22.54
  feet.
* At  19.0 feet...Water may be into homes along the river in and near 
  Tonasket. 
* At  18.0 feet...Water will be approaching homes along the river in 
  and near Tonasket. Major flooding of surrounding cropland is 
  likely. Some homes and buildings adjacent to the river will 
  experience some basement and first floor flooding.
* At  17.0 feet...Low lying fields and pasture land in the flood plain
  along the Okanogan river valley, from Oroville to Okanogan, will be
  flooded. Some homes near the river in Okanogan may experience some 
  basement flooding from seepage. Water will be between the railroad 
  and Highway 97 near Cordell, south of Oroville. Water will be 
  against the shoulder of Omak River Road across from Wanacut Creek.
* At  16.0 feet...Pasture land between Rodeo Track Road and Benton 
  Street, on the east side of the river near Omak, will begin to 
  flood. 
* At  15.0 feet...Minor flooding of low-lying areas is likely between 
  Oroville and Tonasket.


&&

LAT...LON 4895 11945 4893 11932 4825 11951 4832 11968 4895 11945


$$

WAC047-110338-
/O.CON.KOTX.FL.W.0008.000000T0000Z-000000T0000Z/
/NITW1.2.SM.180509T0400Z.180511T1200Z.000000T0000Z.NO/
838 PM PDT Wed May 9 2018

The Flood Warning continues for
  The Similkameen River near Nighthawk.
* until further notice.
* At  7:30 PM Wednesday the stage was 14.60 feet.
* Flood stage is 14.00 feet.
* Minor flooding is occurring and Moderate flooding is forecast.
* Forecast...The river is expected to continue to rise to near 15.4 
  feet by Friday morning, which would be a higher stage than has been
  seen since 1974.
* At  14.2 feet...Water may begin to come over Loomis-Oroville road on
  the south end of Palmer Lake.  
* At  13.0 feet...The Similkameen River will begin to back up into 
  Palmer Lake and water will be a few inches deep over Chopaka Road. 
  Low-lying pastures and agricultural land around Chopaka and 
  Allemandi Roads will be flooded. Water will begin to encroach on 
  farm land just downstream of the Nighthawk bridge.

&&

LAT...LON 4885 11957 4889 11982 4900 11980 4900 11943 4890 11947


$$

WAC047-110338-
/O.EXT.KOTX.FL.W.0009.000000T0000Z-180511T1411Z/
/PATW1.1.SM.180509T2200Z.180510T1200Z.180511T0211Z.NR/
838 PM PDT Wed May 9 2018

...Flood Warning now in effect until Friday morning...
The Flood Warning continues for
  The Methow River near Pateros.
* until Friday morning.
* At  7:15 PM Wednesday the stage was 10.17 feet.
* Flood stage is 10.00 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river is expected to continue to rise to near  10.4 
  feet by early tomorrow. The river is forecast to fall below flood 
  stage tomorrow evening.
* At  12.0 feet...Significant flooding is likely throughout the Methow
  Valley from Mazama to Pateros.
* At  10.0 feet...Minor flooding of adjacent roads and low-lying areas
  is likely throughout the Methow Valley from Mazama to Pateros.

&&

LAT...LON 4805 11984 4800 11988 4819 12015 4824 12006 4808 11989


$$

IDC021-110338-
/O.CON.KOTX.FL.W.0006.000000T0000Z-000000T0000Z/
/EASI1.1.SM.180508T0507Z.180510T0600Z.000000T0000Z.NR/
838 PM PDT Wed May 9 2018

The Flood Warning continues for
  The Moyie River at Eastport.
* until further notice.
* At  7:45 PM Wednesday the stage was  9.22 feet.
* Flood stage is  9.00 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river is expected to continue to rise to near 9.6 
  feet by tonight, which would be a higher stage than has been seen
  since 1974.
* At  10.0 feet...Several homes are flooded on U.S. 95 south of 
  Eastport. Flooding occurs on portions of Meadow Creek Road between 
  Eastport and Meadow Creek.
* At   9.9 feet...Water enters basements of government housing on U.S.
  95...just south of the Canadian Border. 
* At   9.0 feet...Lowland flooding occurs between Eastport and Addie.


&&

LAT...LON 4902 11627 4901 11609 4871 11610 4872 11622 4902 11627


$$

WAC007-110338-
/O.EXT.KOTX.FL.W.0010.000000T0000Z-180511T0827Z/
/STHW1.1.SM.180509T2036Z.000000T0000Z.180510T2027Z.NO/
838 PM PDT Wed May 9 2018

...Flood Warning now in effect until late Thursday night...
The Flood Warning continues for
  The Stehekin River at Stehekin.
* until late Thursday night.
* At  7:30 PM Wednesday the stage was 23.97 feet.
* Flood stage is 24.00 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage by this evening and continue to 
  rise to near  24.1 feet by early Thursday. The river is forecast to
  fall below flood stage by Thursday early afternoon.
* At  24.0 feet...The River may be out of its banks in spots and onto 
  the Stehekin Valley Road and Company Creek Road.
* At  23.8 feet...McGregor's Meadow Road will be mostly flooded. 
* At  23.5 feet...Some water may be over McGregor Meadows Road and the
  drive through the Tollber pasture. Part of the Harlequin Campground
  may be flooded. 


&&

LAT...LON 4849 12076 4832 12057 4825 12067 4831 12101 4848 12103


$$

IDC009-110338-
/O.CON.KOTX.FL.W.0003.000000T0000Z-000000T0000Z/
/SJMI1.1.SM.180508T0845Z.180511T0600Z.000000T0000Z.NO/
838 PM PDT Wed May 9 2018

The Flood Warning continues for
  The St Joe River at St Maries.
* until further notice.
* At  7:30 PM Wednesday the stage was 33.00 feet.
* Flood stage is 32.50 feet.
* Minor flooding is occurring.
* Forecast...The river is expected to continue to rise to near 33.1 
  feet by Thursday late evening.
* At  35.0 feet...Water will be up to Aqua Avenue in St Maries.
* At  33.0 feet...Water may be over St Joe City Road.
* At  32.5 feet...Minor flooding will occur throughout the low lying 
  areas of the St Joe Valley. Water will be observed behind levees 
  due to seepage. Minor flooding of the Aqua Park along the river's 
  edge. Outbuildings along the river that are not behind levees may 
  be flooded.


&&

LAT...LON 4701 11627 4717 11663 4728 11668 4740 11665 4735 11632


$$

What forecasters said that day

The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Spokane, WA wrote its last area forecast discussion before this river flood warning went out at May 8, 4:58 AM PDT, 6 hours 25 minutes earlier.

Area forecast discussion, May 8, 4:58 AM PDT, 6 hours 25 minutes before
Area Forecast Discussion
National Weather Service Spokane WA
458 AM PDT Tue May 8 2018

.SYNOPSIS...
Today will be warm with afternoon temperatures in the upper 70s to
low 80s. A cold front will arrive tonight bringing showers and
thunderstorms along with cooler temperatures for Wednesday. Cool,
showery, and breezy weather will linger into Thursday. Warm and
dry conditions will return over the weekend and persist into early
next week.

&&

.DISCUSSION...
Today through Wednesday night: For today, quiet weather is on tap
with warmer temperatures. The satellite currently shows a fair
amount of clouds over the ID Panhandle and extreme northeast WA
this morning. The cloud-free areas will probably see some morning
fog develop given the high moisture and light winds. Any fog that
does form won't last long. The satellite also shows the next low
off-shore with a leading cold front. This will be moving onshore
for another interesting and exciting weather event tonight and
Wednesday.

The cold front will move across the Oregon Cascades late this
afternoon, firing thunderstorms over central Oregon. Hi-resolution
WRF models all show an organized area of convection that will move
from northeast Oregon into southeast Washington later this
evening. By midnight, precipitation from the front will extend
from the Methow valley to Lewiston, and from there will move
northeast overnight. While the best chance of thunderstorms will
be over southeast WA and the Lewiston area, I included a mention
of thunder throughout the area overnight as the cold front moves
through. A gusty outflow boundary similar to Sunday will accompany
the thunderstorms this evening.

Behind the front it will be breezy, especially in the Cascades.
North and east of Spokane showers and thunderstorms will redevelop
in the afternoon and continue Wednesday evening.

At this time I don't expect any of these thunderstorms to be
severe. Atmospheric moisture is very high (not unusual for this
time of year) so heavy downpours of rain are likely. But the
storms will be moving along at a decent speed so this will
mitigate local flooding concerns. See below for a recap of the
river warnings.  RJ

Thursday: There is decent model agreement that an upper low will
slide down the BC coast into Washington on Thursday. Chilly air
aloft will promote the development of showers. Convective coverage
will increase with daytime warming. By mid afternoon, the GFS,
NAM, and ECMWF forecast enough surface based instability to
include the mention of isolated to scattered thunderstorms over
northeast Washington into the Idaho Panhandle. With afternoon
temperatures in the 60s, storms that develop should be typical
spring cells capable of brief downpours and pea size hail. Breezy
winds will accompany the arrival of Thursday's low. Look for 15 to
25 mph winds out of the west from Wenatchee to Moses Lake to
Spokane and Pullman from late morning into early evening.

Friday: By Friday, our upper low will descend into southern Oregon
and end up over Nevada and Utah by the evening. A northerly
surface pressure gradient will develop which will likely produce
breezy north winds down the Okanogan Valley onto the Waterville
Plateau. The GFS holds onto enough shallow instability for widely
scattered showers over the Idaho Panhandle mountains through the
afternoon, but the remainder of the Inland Northwest should see
showers decrease by morning. Temperatures will rebound into the
low 70s across central and north central Washington on Friday, but
the Panhandle and eastern third of Washington will likely remain
in the 60s.

Saturday through Monday: The medium range models are in very good
agreement that a high pressure ridge will build over British
Columbia and Washington over the weekend as low pressure resides
over the Great Basin. Look for clearing skies on Saturday with
north or northeast winds in the 10 to 15mph range with locally
higher gusts along the Highway 95 corridor from Sandpoint to Coeur
d'Alene. Pressure gradients are forecast to relax Sunday yielding
lighter winds and warmer temperatures. By Sunday and Monday, most
of the Inland Northwest will climb into the upper 70s to low 80s.
/GKoch

&&

.HYDROLOGY...
We have the following flood watches and warnings out.

Flood Warnings
* Moyie River in Boundary County.
* St Joe River in Benewah County.
* Okanogan River in Okanogan County.
* Kettle River in Ferry County.

Flood Watches
* Similkameen River in Okanogan County.
* Stehekin River in Chelan County.

&&

.AVIATION...
12z TAFS: LIFR fog and stratus are possible at KGEG/KSFF/KCOE this
morning. Otherwise conditions should be VFR at all TAF sites with
light winds and increasing high clouds. A cold front will move
into the region from the southwest bringing showers and possible
thunderstorms to all TAF sites. KLWS and KPUW have the best chance
of thunderstorms, but they are possible at the other TAF sites as
well. Heavy rain will accompany the thunderstorms which could
produce brief IFR conditions.  RJ

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        77  55  66  45  63  42 /   0  70  70  10  30  30
Coeur d'Alene  77  56  65  44  62  41 /   0  60  80  20  30  30
Pullman        77  55  64  44  61  41 /   0  80  70  10  20  40
Lewiston       83  59  70  48  68  47 /  10  80  60  20  20  30
Colville       80  55  70  44  63  42 /   0  40  70  20  60  60
Sandpoint      75  52  63  42  61  40 /   0  30  90  40  30  30
Kellogg        75  50  62  42  59  38 /   0  70  90  40  30  30
Moses Lake     83  59  74  47  70  45 /   0  50  30   0  10  40
Wenatchee      79  57  70  49  69  48 /   0  70  20   0  10  30
Omak           80  59  72  47  68  45 /   0  90  60  10  40  30

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...None.

&&
Hazardous weather outlook, May 8, 7:14 AM PDT, 4 hours 9 minutes before
Hazardous Weather Outlook
National Weather Service Spokane WA
714 AM PDT Tue May 8 2018

IDZ001>004-026-027-WAZ031>038-041>044-091415-
Northern Panhandle-Coeur d'Alene Area-Idaho Palouse-
Central Panhandle Mountains-Lewiston Area-
Lewis and Southern Nez Perce Counties-Northeast Blue Mountains-
Lower Garfield and Asotin Counties-Washington Palouse-
Moses Lake Area-Upper Columbia Basin-Spokane Area-
Northeast Mountains-Okanogan Highlands-Wenatchee Area-
East Slopes Northern Cascades-Okanogan Valley-Waterville Plateau-
714 AM PDT Tue May 8 2018

This Hazardous Weather Outlook is for portions of North Idaho...
North Central Idaho...Central Washington...East Central
Washington...North Central Washington...Northeast Washington and
Southeast Washington.

.DAY ONE...TODAY AND TONIGHT

A line of showers and thunderstorms will move through the region
tonight. Some of these thunderstorms will contain heavy rain.
Storms in southeast Washington and the southern Panhandle could
also contain small hail and gusty winds.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Many area rivers will remain very high with some flooding in the
Idaho Panhandle and extreme northern Washington.

The office that day

Everything else NWS Spokane, WA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 8, 8:57 AM PDTAreal Flood WarningOTXOkanogan4 days
May 8, 11:23 AM PDTRiver Flood WarningOTXOkanogan5 days
May 8, 11:23 AM PDTRiver Flood WarningOTXOkanogan4 days
May 8, 3:35 PM PDTAreal Flood WarningOTXOkanogan4 days

Nearby

River Flood Warnings in Washington, 2018Every river flood warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.