Alert archive / Washington / Flash Flood Warnings in 2014

Flash Flood Warning 2, NWS Spokane, WA

July 23, 2014Chelan County, Washington

NWS Spokane, WA issued this flash flood warning at Jul 23, 2014, 1:41 PM PDT for Chelan County, Washington. It was in force for 3 hr. 1 report 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 23, 2014, 1:41 PM PDT (20:41 UTC)
Expired: Jul 23, 2014, 4:45 PM PDT
In force: 3 hr
Issued by: NWS Spokane, WA
Area: Storm-based polygon
Flood severity: None

County Chelan County, WA

The radar

The Seattle radar (KATX), 178 km from the middle of the area, began a volume at 20:43 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 23, 2:20 PM PDT	FLASH FLOOD	3 Sw Entiat, WA	MILLS CANYON FIRE REPORTED 5 SMALL DEBRIS FLOWS UP THE ENTIAT RIVER CANYON

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 12:00Z, 8.7 hours before the alert went out and 289 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: 1236 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 100 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.

505 
WGUS56 KOTX 232044
FFWOTX
WAC007-232345-
/O.NEW.KOTX.FF.W.0002.140723T2041Z-140723T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MILLS CANYON BURN SCAR IN CENTRAL CHELAN COUNTY IN NORTH CENTRAL 
  WASHINGTON...

* UNTIL 445 PM PDT
    
* AT 141 PM PDT...DOPPLER RADAR INDICATED SEVERAL RAIN PRODUCING 
  SYSTEMS HAVE MOVED OVER THE MILLS CANYON BURN SCAR. MORE RAIN IS 
  EXPECTED. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. EXCESSIVE 
  RAINFALL OVER THE BURN SCAR MAY RESULT IN DEBRIS FLOWS. THE DEBRIS 
  FLOWS CAN CONSIST OF ROCK...MUD...VEGETATION AND OTHER LOOSE 
  MATERIALS.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN OR DOWNSTREAM OF THE BURNED AREA MOVE TO HIGHER 
GROUND. ACT QUICKLY TO PROTECT YOUR LIFE.

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

MOVE AWAY FROM RECENTLY BURNED AREAS. THE HEAVY RAINS WILL LIKELY 
TRIGGER ROCKSLIDES...MUDSLIDES AND DEBRIS FLOWS IN STEEP 
TERRAIN...ESPECIALLY IN AND AROUND THESE AREAS.

THE AFFECTED AREAS ARE THE MILLS CANYON BURN SCARS ABOVE HIGHWAY 97A
AND ENTIAT RIVER ROAD. HIGH INTENSITY RAINFALL ON THE BURNED AREAS
MAY CAUSE DANGEROUS FLASH FLOODING AND DEBRIS FLOWS. RESIDENTS AND
MOTORISTS IN AND BELOW THE MILLS CANYON BURN SCAR SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4769 12021 4766 12022 4764 12024 4759 12023
      4756 12027 4757 12036 4769 12037

$$

KR

2 follow-up statements

163 
WGUS76 KOTX 232157
FFSOTX

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

WAC007-232345-
/O.CON.KOTX.FF.W.0002.000000T0000Z-140723T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHELAN WA-
254 PM PDT WED JUL 23 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR 
THE MILLS CANYON BURN SCAR IN CENTRAL CHELAN COUNTY...

AT 254 PM PDT...DOPPLER RADAR HAS TRACKED SEVERAL STORMS MOVING OVER 
THE MILLS CANYON BURN SCAR TODAY. ANOTHER ROUND OF RAIN IS EXPECTED 
TO ARRIVE AROUND 4PM. 

EXCESSIVE RAINFALL OVER THE BURN SCAR MAY RESULT IN DEBRIS FLOWS. 
THE DEBRIS FLOWS CAN CONSIST OF ROCK...MUD...VEGETATION AND OTHER 
LOOSE MATERIALS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

THE AFFECTED AREAS ARE THE MILLS CANYON BURN SCARS ABOVE HIGHWAY 97A 
AND ENTIAT RIVER ROAD. HIGH INTENSITY RAINFALL ON THE BURNED AREAS 
MAY CAUSE DANGEROUS FLASH FLOODING AND DEBRIS FLOWS. RESIDENTS AND 
MOTORISTS IN AND BELOW THE MILLS CANYON BURN SCAR SHOULD TAKE 
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4769 12021 4766 12022 4764 12024 4759 12023
      4756 12027 4757 12036 4769 12037

$$

KR

586 
WGUS76 KOTX 232207
FFSOTX

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

WAC007-232345-
/O.CON.KOTX.FF.W.0002.000000T0000Z-140723T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHELAN WA-
305 PM PDT WED JUL 23 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR
CENTRAL CHELAN COUNTY...

AT 305 PM PDT...DOPPLER RADAR HAS TRACKED SEVERAL STORMS MOVING OVER 
THE MILLS CANYON BURN SCAR TODAY. ANOTHER ROUND OF RAIN IS EXPECTED 
TO ARRIVE AROUND 3:30PM. 

EXCESSIVE RAINFALL OVER THE BURN SCAR MAY RESULT IN DEBRIS FLOWS. 
THE DEBRIS FLOWS CAN CONSIST OF ROCK...MUD...VEGETATION AND OTHER 
LOOSE MATERIALS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

THE AFFECTED AREAS ARE THE MILLS CANYON BURN SCARS ABOVE HIGHWAY 97A 
AND ENTIAT RIVER ROAD. HIGH INTENSITY RAINFALL ON THE BURNED AREAS 
MAY CAUSE DANGEROUS FLASH FLOODING AND DEBRIS FLOWS. RESIDENTS AND 
MOTORISTS IN AND BELOW THE MILLS CANYON BURN SCAR SHOULD TAKE 
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4769 12021 4766 12022 4764 12024 4759 12023
      4756 12027 4757 12036 4769 12037

$$

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, 2:08 PM PDT	Flash Flood Warning	OTX	Chelan	5 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.