Alert archive / Washington / Flash Flood Warnings in 2014

Flash Flood Warning 3, NWS Spokane, WA

July 23, 2014Chelan County, Washington

NWS Spokane, WA issued this flash flood warning at Jul 23, 2014, 2:08 PM PDT for Chelan County, Washington. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 23, 2014, 2:08 PM PDT (21:08 UTC)
Expired: Jul 23, 2014, 7:15 PM PDT
In force: 5 hr
Issued by: NWS Spokane, WA
Area: Storm-based polygon
Flood severity: None

County Chelan County, WA

The radar

The Seattle radar (KATX), 155 km from the middle of the area, began a volume at 21:09 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.

The nearest sounding before it

Quillayute State, WA (KUIL), launched 12:00Z, 9.1 hours before the alert went out and 300 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 949 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

623 
WGUS56 KOTX 232111
FFWOTX
WAC007-240215-
/O.NEW.KOTX.FF.W.0003.140723T2108Z-140724T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
208 PM PDT WED JUL 23 2014

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL CHELAN COUNTY IN NORTH CENTRAL WASHINGTON...

* UNTIL 715 PM PDT
    
* AT 208 PM PDT...DOPPLER RADAR INDICATED ANOTHER THUNDERSTORM 
  PRODUCING HEAVY RAIN IN THE ENTIAT RIVER VALLEY UP TO THE SOUTH 
  SHORE OF LAKE CHELAN NEAR SLIDE RIDGE. REPORTS OF MUDSLIDES AT 
  MILE POST 11 ON THE ENTIAT RIVER ROAD AND ROLLING BOULDERS NEAR 
  TOMMY CREEK WERE RECEIVED IN THE STORM EARLIER TODAY. ADDITIONAL 
  RAIN IS EXPECTED.  
  
  FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. EXCESSIVE RAINFALL    
  OVER THE WARNING AREA MARY CAUSE MUD SLIDES NEAR STEEP TERRAIN.    
  THE MUD SLIDE CAN CONSIST OF ROCK... MUD...VEGETATION AND OTHER    
  LOOSE MATERIALS.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  COTTONWOOD CAMPGROUND...25 MILE CREEK STATE PARK...ARDENVOIR...PINE
  FLAT CAMPGROUND...FOX CREEK CAMPGROUND...RAMONA PARK CAMPGROUND...
  GROUSE MOUNTAIN CAMPGROUND AND SILVER FALLS CAMPGROUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4764 12040 4812 12079 4815 12071 4798 12021
      4770 12032

$$

KR

2 follow-up statements

590 
WGUS76 KOTX 232219
FFSOTX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
317 PM PDT WED JUL 23 2014

WAC007-240215-
/O.CON.KOTX.FF.W.0003.000000T0000Z-140724T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHELAN WA-
317 PM PDT WED JUL 23 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM PDT FOR
CENTRAL CHELAN COUNTY...

AT 317 PM PDT...DOPPLER RADAR HAS TRACKED SEVERAL STORMS TODAY 
MOVING OVER THE ENTIAT RIVER VALLEY AND THE SOUTH SHORE OF LAKE 
CHELAN NEAR SLIDE RIDGE. ANOTHER ROUND OF RAIN IS EXPECTED TO ARRIVE 
AROUND 4PM. 

EXCESSIVE RAINFALL OVER THE WARNING AREA MAY CAUSE MUD SLIDES NEAR 
STEEP TERRAIN. THE MUD SLIDE CAN CONSIST OF ROCK...MUD...VEGETATION 
AND OTHER LOOSE MATERIALS.

SOME LOCATIONS THAT MAY EXPERIENCE FLOODING INCLUDE... COTTONWOOD 
CAMPGROUND...25 MILE CREEK STATE PARK...ARDENVOIR...PINE FLAT 
CAMPGROUND...FOX CREEK CAMPGROUND...RAMONA PARK CAMPGROUND... GROUSE 
MOUNTAIN CAMPGROUND AND SILVER FALLS CAMPGROUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND. ACT QUICKLY TO PROTECT YOUR LIFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4764 12040 4812 12079 4815 12071 4798 12021
      4770 12032

$$

KR

436 
WGUS76 KOTX 240053
FFSOTX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
552 PM PDT WED JUL 23 2014

WAC007-240102-
/O.CAN.KOTX.FF.W.0003.000000T0000Z-140724T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHELAN WA-
552 PM PDT WED JUL 23 2014

...THE FLASH FLOOD WARNING FOR CENTRAL CHELAN COUNTY IS CANCELLED...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT.

LAT...LON 4764 12040 4812 12079 4815 12071 4798 12021
      4770 12032

$$

KR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 12:55 PM PDT	Flash Flood Warning	OTX	Okanogan	3 hr
Jul 23, 1:26 PM PDT	Severe Thunderstorm Warning	OTX	Okanogan	40 min
Jul 23, 1:41 PM PDT	Flash Flood Warning	OTX	Chelan	3 hr
Jul 23, 2:41 PM PDT	Severe Thunderstorm Warning	OTX	Garfield, Whitman	49 min
Jul 23, 2:43 PM PDT	Areal Flood Advisory	OTX	Okanogan	3 hr
Jul 23, 2:51 PM PDT	Special Weather Statement	OTX	Okanogan	24 min
Jul 23, 2:56 PM PDT	Special Weather Statement	OTX	Lincoln	34 min
Jul 23, 3:00 PM PDT	Special Weather Statement	OTX	Stevens	45 min
Jul 23, 3:13 PM PDT	Severe Thunderstorm Warning	OTX	Ferry, Stevens	47 min
Jul 23, 3:22 PM PDT	Severe Thunderstorm Warning	OTX	Whitman	38 min
Jul 23, 3:31 PM PDT	Special Weather Statement	OTX	Whitman	44 min
Jul 23, 3:37 PM PDT	Severe Thunderstorm Warning	OTX	Asotin, Garfield, Whitman	38 min
Jul 23, 3:59 PM PDT	Severe Thunderstorm Warning	OTX	Stevens	31 min
Jul 23, 4:00 PM PDT	Severe Thunderstorm Warning	OTX	Lincoln, Spokane, Stevens	45 min
Jul 23, 4:01 PM PDT	Severe Thunderstorm Warning	OTX	Spokane, Whitman	44 min
Jul 23, 4:09 PM PDT	Special Weather Statement	OTX	Ferry	66 min
Jul 23, 4:22 PM PDT	Severe Thunderstorm Warning	OTX	Pend Oreille, Stevens	53 min
Jul 23, 4:26 PM PDT	Severe Thunderstorm Warning	OTX	Douglas, Ferry, Grant, Lincoln, Okanogan, Stevens	49 min
Jul 23, 4:40 PM PDT	Severe Thunderstorm Warning	OTX	Lincoln	35 min
Jul 23, 4:58 PM PDT	Severe Thunderstorm Warning	OTX	Ferry, Okanogan	77 min

Nearby

Flash Flood Warnings in Washington, 2014 Every flash flood warning in 2014

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.