Alert archive / Washington / Flash Flood Warnings in 2022

Flash Flood Warning 21, NWS Spokane, WA

July 4, 2022Okanogan County, Washington

NWS Spokane, WA issued this flash flood warning at Jul 4, 2022, 6:09 PM PDT for Okanogan County, Washington. It was in force for 3 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 4, 2022, 6:09 PM PDT (01:09 UTC)
Expired: Jul 4, 2022, 9:15 PM PDT
In force: 3 hr
Issued by: NWS Spokane, WA
Area: Storm-based polygon
Flood severity: None

County Okanogan County, WA

The radar

The Seattle radar (KATX), 161 km from the middle of the area, began a volume at 01:09 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.

What was reported inside it

Time	Report	Where	Remark
Jul 4, 6:30 PM PDT	FLASH FLOOD	8 Sw Winthrop, WA	ROCK, MUD, AND DEBRIS ON ROADS IN THE TWISP RIVER VALLEY, INCLUDING ADJACENT TO THE LITTLE BRIDGE CREEK AND ON THOMPSON ROAD, FROM FLASH FLOODING. TIME ESTIMATED FROM RADAR.
Jul 4, 6:56 PM PDT	FLASH FLOOD	5 Wnw Winthrop, WA	WOLF CREEK ROAD FLOODED WITH ROCKS, MUD, AND DEBRIS ON THE ROAD. TIME BASED ON SOCIAL MEDIA REPORT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 1.2 hours before the alert went out and 308 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 9 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 1054 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: -3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

300 
WGUS56 KOTX 050109
FFWOTX
WAC047-050415-
/O.NEW.KOTX.FF.W.0021.220705T0109Z-220705T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Spokane WA
609 PM PDT Mon Jul 4 2022

The National Weather Service in Spokane has issued a

* Flash Flood Warning for...
  The Cedar Creek Burn Scar in...
  West Central Okanogan County in north central Washington...

* Until 915 PM PDT.

* At 609 PM PDT, Doppler radar indicated thunderstorms producing 
  heavy rain over the Cedar Creek Burn Scar. Flash flooding is 
  ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms in and around
           the Cedar Creek Burn Scar.

  SOURCE...Radar.

  IMPACT...Flooding of areas in and around the Cedar Creek Burn
           Scar.

* Some locations that will experience flash flooding include...
  Mazama.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The affected areas are in and below the Cedar Creek burn scar south 
of Highway 2 from Mazama to Winthrop, including the Chickadee 
Trailhead and Wolf Creek Road. Some drainage basins impacted include 
Cedar Creek, Varden Creek, Little Boulder Creek, Wolf Creek, and 
Thompson Creek. Moderate to high intensity rainfall on the burned 
area may cause flash flooding, mud slides and rock slides. Campers, 
hikers residents, and motorists in and below the Cedar Creek burned 
area should take immediate precautions to protect life and property.

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.

&&

LAT...LON 4861 12044 4851 12021 4839 12023 4838 12035
      4851 12056

FLASH FLOOD...RADAR INDICATED

$$

CMS

2 follow-up statements

158 
WGUS76 KOTX 050213
FFSOTX

Flash Flood Statement
National Weather Service Spokane WA
713 PM PDT Mon Jul 4 2022

WAC047-050415-
/O.CON.KOTX.FF.W.0021.000000T0000Z-220705T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Okanogan WA-
713 PM PDT Mon Jul 4 2022

...FLASH FLOOD WARNING FOR THE CEDAR CREEK BURN SCAR REMAINS IN 
EFFECT UNTIL 915 PM PDT THIS EVENING FOR WEST CENTRAL OKANOGAN 
COUNTY...

At 713 PM PDT, the public reported flash flooding on Wolf Creek Road 
adjacent to the Cedar Creek burn scar. Mud and debris were covering 
the roadway. Avoid areas near the burn scar, as runoff from earlier 
heavy rainfall is likely continuing.

HAZARD...Flash flooding caused by heavy rain in and around the
         Cedar Creek Burn Scar.

SOURCE...Public reported.

IMPACT...Flooding of areas in and around the Cedar Creek Burn
         Scar.

Some locations that will experience flash flooding include...
  Mazama.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The affected areas are in and below the Cedar Creek burn scar south 
of Highway 2 from Mazama to Winthrop, including the Chickadee 
Trailhead and Wolf Creek Road. Some drainage basins impacted include 
Cedar Creek, Varden Creek, Little Boulder Creek, Wolf Creek, and 
Thompson Creek. Moderate to high intensity rainfall on the burned 
area may cause flash flooding, mud slides and rock slides. Campers, 
hikers residents, and motorists in and below the Cedar Creek burned 
area should take immediate precautions to protect life and property.

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.

&&

LAT...LON 4861 12044 4851 12021 4839 12023 4838 12035
      4851 12056

FLASH FLOOD...OBSERVED

$$

CMS

025 
WGUS76 KOTX 050413
FFSOTX

Flash Flood Statement
National Weather Service Spokane WA
913 PM PDT Mon Jul 4 2022

WAC047-050423-
/O.EXP.KOTX.FF.W.0021.000000T0000Z-220705T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Okanogan WA-
913 PM PDT Mon Jul 4 2022

...FLASH FLOOD WARNING FOR THE CEDAR CREEK BURN SCAR WILL EXPIRE AT 
915 PM PDT THIS EVENING FOR WEST CENTRAL OKANOGAN COUNTY...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

LAT...LON 4861 12044 4851 12021 4839 12023 4838 12035
      4851 12056

$$

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 5:01 PM PDT	Special Weather Statement	OTX	Okanogan	29 min
Jul 4, 5:35 PM PDT	Areal Flood Warning	OTX	Okanogan	4 hr
Jul 4, 5:40 PM PDT	Special Weather Statement	OTX	Ferry	50 min
Jul 4, 5:46 PM PDT	Areal Flood Advisory	OTX	Okanogan	2 hr
Jul 4, 6:40 PM PDT	Flash Flood Warning	OTX	Okanogan	110 min
Jul 4, 6:51 PM PDT	Areal Flood Advisory	OTX	Ferry, Okanogan	3 hr
Jul 4, 7:21 PM PDT	Special Weather Statement	OTX	Ferry	39 min
Jul 4, 8:01 PM PDT	Special Weather Statement	OTX	Lincoln	44 min
Jul 4, 8:02 PM PDT	Special Weather Statement	OTX	Lincoln	43 min
Jul 4, 8:38 PM PDT	Special Weather Statement	OTX	Lincoln	52 min
Jul 4, 8:39 PM PDT	Special Weather Statement	OTX	Lincoln	51 min
Jul 4, 9:28 PM PDT	Special Weather Statement	OTX	Stevens	47 min
Jul 4, 10:41 PM PDT	Areal Flood Advisory	OTX	Stevens	64 min

Nearby

Flash Flood Warnings in Washington, 2022 Every flash flood warning in 2022

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.