Alert archive / Washington / Flood Watches in 2021
Flood Watch 3, NWS Spokane, WA
NWS Spokane, WA issued this flood watch at Nov 26, 2021, 2:22 PM PST for Chelan County, Okanogan County, Washington. It took effect at Nov 27, 2021, 10:00 PM PST. It was in force for 22 hr.
The area
The counties it named.
The facts
- Issued
- Nov 26, 2021, 2:22 PM PST (22:22 UTC)
- In effect from
- Nov 27, 2021, 10:00 PM PST
- Expired
- Nov 28, 2021, 8:21 PM PST
- In force
- 22 hr
- Issued by
- NWS Spokane, WA
- Flood severity
- None
Counties Chelan County, WA, Okanogan County, WA
The radar
The Seattle radar (KATX), 172 km from the middle of the area, began a volume at 22:20 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 nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 10.4 hours before the alert went out and 287 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1344 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 260 m²/s²
- 0-3 km storm-relative helicity
- 309 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
123 WGUS66 KOTX 262222 FFAOTX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Spokane WA 222 PM PST Fri Nov 26 2021 .After a brief break in the rain Friday night into Saturday morning, steady moderate to heavy rain will develop by Saturday evening. Additional rainfall amounts of 2 to 5 inches will be possible near the crest of the Cascades through Monday. Additionally, mild temperatures and wind will lead to some melting of the early season snowpack. WAC007-047-271400- /O.NEW.KOTX.FA.A.0003.211128T0600Z-211130T0600Z/ /00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chelan-Okanogan- Including the cities of Omak, Malott, Winthrop, Manson, Brewster, Plain, Monse, Leavenworth, Molson, Okanogan, Mazama, Nespelem, Twisp, Methow, Oroville, Chesaw, Cashmere, Chelan, Conconully, Entiat, and Wenatchee 222 PM PST Fri Nov 26 2021 ...FLOOD WATCH IN EFFECT FROM SATURDAY EVENING THROUGH MONDAY EVENING... * WHAT...Flooding caused by rain and snowmelt is possible. * WHERE...A portion of North Central Washington, including the following counties, Chelan and Okanogan. * WHEN...From Saturday evening through Monday evening. * IMPACTS...Minor flooding of small streams and creeks will be possible. There will also be an increased risk of rock slides and debris flows in steep terrain and the potential to impact roads and backcountry trails, including near burn scars: in Okanogan County: Cedar Creek and Cub Creek 2 and in Chelan County: 25 Mile Fire. The Stehekin River will be running high and could reach flood stage by Sunday evening. * ADDITIONAL DETAILS... - 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. Monitor current river levels and forecasts at: http://water.weather.gov/ahps2/area. php?wfo=otx&hydro_type=0&hsa_type=1 && $$ MSC
5 follow-up statements
282 WGUS66 KOTX 270326 FFAOTX Flood Watch National Weather Service Spokane WA 726 PM PST Fri Nov 26 2021 .After a brief break in the rain Friday night into Saturday morning, steady moderate to heavy rain will develop by Saturday evening. Additional rainfall amounts of 2 to 5 inches will be possible near the crest of the Cascades through Monday. Additionally, mild temperatures and wind will lead to some melting of the early season snowpack. WAC007-047-272000- /O.CON.KOTX.FA.A.0003.211128T0600Z-211130T0600Z/ /00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chelan-Okanogan- Including the cities of Plain and Mazama 726 PM PST Fri Nov 26 2021 ...FLOOD WATCH REMAINS IN EFFECT FROM SATURDAY EVENING THROUGH MONDAY EVENING... * WHAT...Flooding caused by rain and snowmelt is possible. * WHERE...A portion of North Central Washington, including the following counties, Chelan and Okanogan. * WHEN...From Saturday evening through Monday evening. * IMPACTS...Minor flooding of small streams and creeks will be possible. There will also be an increased risk of rock slides and debris flows in steep terrain and the potential to impact roads and backcountry trails, including near burn scars: in Okanogan County: Cedar Creek and Cub Creek 2. The Stehekin River will be running high and could reach flood stage by Sunday evening. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. Monitor current river levels and forecasts at: http://water.weather.gov/ahps2/area. php?wfo=otx&hydro_type=0&hsa_type=1 && $$ JW
427
WGUS66 KOTX 271917
FFAOTX
Flood Watch
National Weather Service Spokane WA
1117 AM PST Sat Nov 27 2021
.Heavy rain on snowpack may lead to increased runoff over the north
Washington Cascades. Rises on small streams and creeks as well as
minor rock slides are potential impacts.
WAC007-047-281300-
/O.CON.KOTX.FA.A.0003.211128T0600Z-211130T0600Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chelan-Okanogan-
Including the cities of Mazama
1117 AM PST Sat Nov 27 2021
...FLOOD WATCH REMAINS IN EFFECT FROM 10 PM PST THIS EVENING THROUGH
MONDAY EVENING...
* WHAT...Flooding caused by rain and snowmelt continues to be
possible.
* WHERE...A portion of North Central Washington, including the
following counties, Chelan and Okanogan.
* WHEN...From 10 PM PST this evening through Monday evening.
* IMPACTS...Excessive runoff may result in abrupt rises of creeks
and streams.
* ADDITIONAL DETAILS...
- The last several weeks have been quite wet. Additional
rainfall may heighten the potential for rock slides in steep
terrain especially in the vicinity of burn scars.
- 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.
&&
$$
GKOCH611
WGUS66 KOTX 281206
FFAOTX
Flood Watch
National Weather Service Spokane WA
406 AM PST Sun Nov 28 2021
.Heavy rain may fall on a deep primed snowpack leading to the melt
increasing. Flows in rivers may increase quickly and reach critical
levels.
WAC007-047-290015-
/O.CON.KOTX.FA.A.0003.000000T0000Z-211130T0600Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chelan-Okanogan-
Including the cities of Mazama
406 AM PST Sun Nov 28 2021
...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY EVENING...
* WHAT...Flooding caused by rain and snowmelt is possible.
* WHERE...A portion of North Central Washington, including the
following counties, Chelan and Okanogan.
* WHEN...Through Monday evening.
* IMPACTS...Excessive runoff may result in abrupt rises of creeks
and streams.
* ADDITIONAL DETAILS...
- The last several weeks have been quite wet. Additional
rainfall may heighten the potential for rock slides in steep
terrain especially in the vicinity of burn scars.
The Stehekin River is forecast to continue to rise today and
crest early Monday morning around 23.5 feet. Flood stage is
24 feet.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
Monitor current river levels and forecasts at:
http://water.weather.gov/ahps2/area.
php?wfo=otx&hydro_type=0&hsa_type=1
&&
$$
RJ575
WGUS66 KOTX 282336
FFAOTX
Flood Watch
National Weather Service Spokane WA
336 PM PST Sun Nov 28 2021
.More rain will fall tonight into Monday over the north Cascades.
This portion of north central Washington has received a lot of rain
this weekend and over the last several weeks.
WAC007-047-291300-
/O.CON.KOTX.FA.A.0003.000000T0000Z-211130T0600Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chelan-Okanogan-
Including the cities of Mazama
336 PM PST Sun Nov 28 2021
...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY EVENING...
* WHAT...Flooding caused by rain and snowmelt continues to be
possible.
* WHERE...A portion of North Central Washington, including the
following counties, Chelan and Okanogan.
* WHEN...Through Monday evening.
* IMPACTS...Excessive runoff may result may result in abrupt rises
of creeks and streams.
* ADDITIONAL DETAILS...
- The last several weeks have been quite wet. Additional
rainfall may heighten the potential for rock slides in steep
terrain especially in the vicinity of burn scars.
The Stehekin River will continue to rise today and crest
early Monday morning.
- 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.
&&
$$
GKOCH494 WGUS66 KOTX 290421 FFAOTX Flood Watch National Weather Service Spokane WA 821 PM PST Sun Nov 28 2021 WAC007-047-290530- /O.CAN.KOTX.FA.A.0003.000000T0000Z-211130T0600Z/ /00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chelan-Okanogan- Including the cities of Mazama 821 PM PST Sun Nov 28 2021 ...FLOOD WATCH IS CANCELLED... The Flood Watch is cancelled for a portion of North Central Washington, including the following counties, Chelan and Okanogan. Flooding is no longer expected to pose a threat as rainfall amounts decrease and snow levels gradually lower into Monday reducing runoff into area rivers. $$ JW
Nearby
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.