Alert archive / Washington / Flash Flood Warnings in 2016

Flash Flood Warning 9, NWS Spokane, WA

July 25, 2016Okanogan County, Washington

NWS Spokane, WA issued this flash flood warning at Jul 25, 2016, 7:39 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
Jul 25, 2016, 7:39 PM PDT (02:39 UTC)
Expired
Jul 25, 2016, 10:30 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), 197 km from the middle of the area, began a volume at 02:41 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, 2.7 hours before the alert went out and 274 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-pSkew-T log-p diagram, Spokane, WA at 00:00Z on 2016-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 00:00Z on 2016-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
5 J/kg
Mixed-layer CIN
-141 J/kg
Mixed-layer LCL
3031 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
15 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

805 
WGUS56 KOTX 260239
FFWOTX
WAC047-260530-
/O.NEW.KOTX.FF.W.0009.160726T0239Z-160726T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
739 PM PDT MON JUL 25 2016

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN OKANOGAN COUNTY IN NORTHEASTERN WASHINGTON...

* UNTIL 1030 PM PDT
    
* AT 735 PM PDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS DOUGLAS MOUNTAIN AREA WEST OF TONASKET AND NORTH
  OF CONCONULLY. RADAR IS INDICATION THAT 2 TO 2.5 INCHES OF RAIN
  HAS FALL...WITH MORE ON THE WAY DUE TO STATIONARY THUNDERSTORMS.
  THE MAIN THREAT AREAS WILL BE ALONG WICKIUP CREEK AND SARSAPKIN
  CREEK.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4882 11971 4877 11968 4873 11968 4868 11974
      4871 11983 4879 11981

$$
2 follow-up statements
429 
WGUS76 KOTX 260420
FFSOTX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
920 PM PDT MON JUL 25 2016

WAC047-260530-
/O.CON.KOTX.FF.W.0009.000000T0000Z-160726T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OKANOGAN WA-
920 PM PDT MON JUL 25 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM PDT FOR
NORTHERN OKANOGAN COUNTY...

AT 913 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS WEAKENING OVER
THE FLOOD THREAT AREA. RADAR ALSO ESTIMATES AROUND 3.5 INCHES OF
RAIN HAS FALLEN. THE PRIMARY THREAT WILL BE ROAD WASHOUTS ALONG
WICKIUP CREEK AND SARSAPKIN CREEK. NO FLASH FLOODING HAS BEEN
REPORTED YET... WITH LOCAL OFFICIALS CHECKING OUT THIS REMOTE AREA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND IF NEEDED... AND BEWARE AWARE OF ROAD WASHOUTS. 
PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4882 11971 4877 11968 4873 11968 4868 11974
      4871 11983 4879 11981

$$
905 
WGUS76 KOTX 260528
FFSOTX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1028 PM PDT MON JUL 25 2016

WAC047-260532-
/O.EXP.KOTX.FF.W.0009.000000T0000Z-160726T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OKANOGAN WA-
1028 PM PDT MON JUL 25 2016

...THE FLASH FLOOD WARNING FOR NORTHERN OKANOGAN COUNTY WILL EXPIRE
AT 1030 PM PDT...

THUNDERSTORMS CONTINUE TO WEAKEN OVER THE AREA...WITH THE HEAVIEST
RAINS WELL EAST OF THE FLASH FLOOD THREAT AREA. FLOODING IS NO
LONGER EXPECTED TO POSE A THREAT. BE ALERT AND HEED ANY ROAD
CLOSURES.

LAT...LON 4882 11971 4877 11968 4873 11968 4868 11974
      4871 11983 4879 11981

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 6:14 PM PDTAreal Flood AdvisoryOTXOkanogan3 hr
Jul 26, 2:22 PM PDTAreal Flood AdvisoryOTXOkanogan3 hr
Jul 26, 3:17 PM PDTAreal Flood AdvisoryOTXOkanogan3 hr
Jul 26, 3:54 PM PDTSpecial Weather StatementOTXPend Oreille21 min
Jul 26, 4:29 PM PDTAreal Flood AdvisoryOTXFerry, Okanogan3 hr
Jul 26, 4:54 PM PDTFlash Flood WarningOTXOkanogan2 hr

Nearby

Flash Flood Warnings in Washington, 2016Every flash flood warning in 2016

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.