Alert archive / Washington / Flash Flood Warnings in 2014

Flash Flood Warning 7, NWS Spokane, WA

August 3, 2014Okanogan County, Washington

NWS Spokane, WA issued this flash flood warning at Aug 3, 2014, 8:28 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 3, 2014, 8:28 PM PDT (03:28 UTC)
Expired: Aug 3, 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 Seattle radar (KATX), 181 km from the middle of the area, began a volume at 03:29 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 277 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: 4 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 3433 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 47 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.

176 
WGUS56 KOTX 040328
FFWOTX
WAC047-040630-
/O.NEW.KOTX.FF.W.0007.140804T0328Z-140804T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
828 PM PDT SUN AUG 3 2014

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL OKANOGAN COUNTY IN NORTHEAST WASHINGTON...

* UNTIL 1130 PM PDT
    
* AT 826 PM PDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN AT THE HEAD WATERS OF THE METHOW RIVER IN THE CARLTON 
  FIRE BURN SCAR NEAR THW TOWN OF CARLTON. FLASH FLOODING IS 
  EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  FOGGY DEW CAMPGROUND...METHOW AND CARLTON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4811 11992 4806 12000 4817 12013 4819 12023
      4826 12012

$$

BT

1 follow-up statement

679 
WGUS76 KOTX 040537
FFSOTX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1037 PM PDT SUN AUG 3 2014

WAC047-040546-
/O.CAN.KOTX.FF.W.0007.000000T0000Z-140804T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OKANOGAN WA-
1037 PM PDT SUN AUG 3 2014

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

THE HEAVY RAIN HAS ENDED...AND FLOODING AND DEBRIS FLOWS ARE NO 
LONGER EXPECTED TO POSE A THREAT. 

LAT...LON 4811 11992 4806 12000 4817 12013 4819 12023
      4826 12012

$$

BT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 6:45 PM PDT	Flash Flood Warning	OTX	Chelan	3 hr
Aug 3, 8:19 PM PDT	Special Weather Statement	OTX	Okanogan	41 min
Aug 4, 2:17 PM PDT	Fire Weather Watch	OTX		16 hr

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.