Alert archive / Washington / Flash Flood Warnings in 2014

Flash Flood Warning 8, NWS Spokane, WA

August 12, 2014Okanogan County, Washington

NWS Spokane, WA issued this flash flood warning at Aug 12, 2014, 8:30 PM PDT for Okanogan County, Washington. It was in force for 3 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: Aug 12, 2014, 8:30 PM PDT (03:30 UTC)
Expired: Aug 12, 2014, 11:30 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 Spokane radar (KOTX), 181 km from the middle of the area, began a volume at 03:32 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 00:00Z, 3.5 hours before the alert went out and 269 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: 13 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 2677 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 42 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.

413 
WGUS56 KOTX 130332
FFWOTX
WAC047-130630-
/O.NEW.KOTX.FF.W.0008.140813T0330Z-140813T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
830 PM PDT TUE AUG 12 2014

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  AREAS IN AND BELOW THE CARLTON COMPLEX FIRE BURN SCAR IN SOUTH 
  CENTRAL OKANOGAN COUNTY IN NORTHEAST WASHINGTON...

* UNTIL 1130 PM PDT
    
* AT 830 PM PDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN MOVING INTO THE CARLTON COMPLEX FIRE BURN SCAR. FLASH 
  FLOODING IS EXPECTED TO BEGIN SHORTLY FROM STEEP SLOPES AND 
  CANYONS THAT HAVE BEEN BADLY BURNED.

* SOME LOCATIONS THAT MAY EXPERIENCE FLOODING INCLUDE AREAS BELOW 
  STEEP SLOPES AND CANYONS BELOW BURNED AREAS NEAR... 
  BREWSTER...PATEROS...FOGGY DEW CAMPGROUND...CRATER CREEK 
  CAMPGROUND...MALOTT...CARLTON AND METHOW.

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.

THE AFFECTED AREAS ARE THE CARLTON COMPLEX FIRE BURN SCARS ABOVE THE
METHOW RIVER VALLEY. HIGH INTENSITY RAINFALL ON THE BURNED AREAS MAY
CAUSE DANGEROUS FLASH FLOODING AND DEBRIS FLOWS. RESIDENTS AND 
MOTORISTS IN AND BELOW THE CARLTON COMPLEX FIRE BURN 
SCAR...INCLUDING MOTORISTS...SHOULD TAKE IMMEDIATE PRECAUTIONS TO 
PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4832 11969 4813 11971 4810 11974 4806 11989
      4799 11987 4796 11989 4804 12006 4813 12014
      4820 12024 4826 12024 4824 12012 4838 11993

$$

KR

1 follow-up statement

033 
WGUS76 KOTX 130616
FFSOTX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1116 PM PDT TUE AUG 12 2014

WAC047-130624-
/O.CAN.KOTX.FF.W.0008.000000T0000Z-140813T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OKANOGAN WA-
1116 PM PDT TUE AUG 12 2014

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL OKANOGAN COUNTY IS
CANCELLED...

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

LAT...LON 4832 11969 4813 11971 4810 11974 4806 11989
      4799 11987 4796 11989 4804 12006 4813 12014
      4820 12024 4826 12024 4824 12012 4838 11993

$$

SB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 5:00 PM PDT	Severe Thunderstorm Warning	OTX	Asotin, Whitman	60 min
Aug 12, 5:10 PM PDT	Severe Thunderstorm Warning	OTX	Adams, Lincoln, Spokane, Whitman	50 min
Aug 12, 5:35 PM PDT	Severe Thunderstorm Warning	OTX	Spokane, Whitman	25 min
Aug 12, 5:49 PM PDT	Severe Thunderstorm Warning	OTX	Ferry, Lincoln, Spokane, Stevens	56 min
Aug 12, 6:43 PM PDT	Severe Thunderstorm Warning	OTX	Douglas, Ferry, Grant, Lincoln, Okanogan, Stevens	62 min
Aug 12, 6:58 PM PDT	Severe Thunderstorm Warning	OTX	Pend Oreille, Spokane	62 min
Aug 12, 7:56 PM PDT	Severe Thunderstorm Warning	OTX	Pend Oreille	64 min
Aug 12, 7:57 PM PDT	Severe Thunderstorm Warning	OTX	Chelan, Douglas, Ferry, Okanogan	63 min
Aug 12, 9:41 PM PDT	Flash Flood Warning	OTX	Chelan	5 hr
Aug 12, 10:59 PM PDT	Flash Flood Warning	OTX	Chelan	3 hr
Aug 12, 11:06 PM PDT	Flash Flood Warning	OTX	Chelan	3 hr
Aug 13, 12:05 AM PDT	Areal Flood Advisory	OTX	Chelan	3 hr
Aug 13, 12:21 AM PDT	Areal Flood Advisory	OTX	Chelan	3 hr
Aug 13, 12:34 AM PDT	Areal Flood Advisory	OTX	Chelan	116 min
Aug 13, 4:53 AM PDT	Areal Flood Advisory	OTX	Okanogan	3 hr
Aug 13, 6:47 AM PDT	Areal Flood Advisory	OTX	Chelan	3 hr
Aug 13, 7:28 AM PDT	Flash Flood Warning	OTX	Chelan	3 hr
Aug 13, 4:06 PM PDT	Special Weather Statement	OTX	Garfield	39 min
Aug 13, 4:46 PM PDT	Special Weather Statement	OTX	Garfield	44 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.