Alert archive / Washington / Flash Flood Warnings in 2013

Flash Flood Warning 3, NWS Spokane, WA

June 29, 2013Chelan County, Washington

NWS Spokane, WA issued this flash flood warning at Jun 29, 2013, 2:56 PM PDT for Chelan County, Washington. It was in force for 94 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 29, 2013, 2:56 PM PDT (21:56 UTC)
Expired: Jun 29, 2013, 4:30 PM PDT
In force: 94 min
Issued by: NWS Spokane, WA
Area: Storm-based polygon
Flood severity: None

County Chelan County, WA

The radar

The Seattle radar (KATX), 144 km from the middle of the area, began a volume at 21:59 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, 9.9 hours before the alert went out and 278 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: 1083 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 149 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.

183 
WGUS56 KOTX 292156
FFWOTX
WAC007-292330-
/O.NEW.KOTX.FF.W.0003.130629T2156Z-130629T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
256 PM PDT SAT JUN 29 2013

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

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

* UNTIL 430 PM PDT

* AT 249 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. RADAR     
  RAINFALL ESTIMATES UP TO AN INCH TO AN INCH AND A QUARTER PER HOUR 
  POSSIBLE.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO JOHNNY     
  CREEK CAMPGROUND...BRIDGE CREEK CAMPGROUND...AND EIGHT MILE        
  CAMPGROUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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 4761 12087 4762 12071 4747 12074 4746 12092

$$

VAN HORN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 7:33 AM PDT	Special Weather Statement	OTX	Chelan	42 min
Jun 29, 7:53 AM PDT	Flash Flood Warning	OTX	Chelan	37 min
Jun 29, 8:23 AM PDT	Severe Thunderstorm Warning	OTX	Grant	37 min
Jun 29, 10:54 AM PDT	Special Weather Statement	OTX	Adams	36 min
Jun 29, 11:45 AM PDT	Special Weather Statement	OTX	Spokane	30 min
Jun 29, 1:14 PM PDT	Flash Flood Watch	OTX	Chelan, Douglas, Okanogan	7 hr
Jun 29, 1:30 PM PDT	Flash Flood Warning	OTX	Chelan	90 min
Jun 29, 2:08 PM PDT	Special Weather Statement	OTX	Grant	52 min
Jun 29, 2:24 PM PDT	Special Weather Statement	OTX	Douglas	51 min
Jun 29, 3:00 PM PDT	Special Weather Statement	OTX	Ferry	45 min
Jun 29, 3:48 PM PDT	Areal Flood Advisory	OTX	Okanogan	117 min
Jun 29, 4:03 PM PDT	Flash Flood Warning	OTX	Chelan	87 min
Jun 29, 4:40 PM PDT	Flash Flood Warning	OTX	Chelan	95 min

Nearby

Flash Flood Warnings in Washington, 2013 Every flash flood warning in 2013

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.