Flash Flood Warning 19, NWS Spokane, WA

092 
WGUS76 KOTX 141928
FFSOTX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1228 PM PDT THU AUG 14 2014

WAC007-142145-
/O.CON.KOTX.FF.W.0019.000000T0000Z-140814T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHELAN WA-
1228 PM PDT THU AUG 14 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 PM PDT FOR
EAST CENTRAL CHELAN COUNTY...

AT 1227 PM PDT...DOPPLER RADAR INDICATED MORE SHOWERS AND   
THUNDERSTORMS PRODUCING MODERATE TO HEAVY RAIN APPROACHING ROUTE   
150 BETWEEN CHELAN AND MANSON WHERE DEBRIS FLOW ON THE ROADWAY AND   
SOME FLOODING OF NEARBY HOMES HAS BEEN REPORTED BY EMERGENCY   
MANAGEMENT EARLIER IN THE DAY. 

EXCESSIVE RAINFALL OVER THESE LOCATIONS THAT HAVE ALREADY   
EXPERIENCED DEBRIS FLOWS AND FLOODING WILL FURTHER COMPLICATE THE 
SITUATION. DEBRIS FLOW CAN CONSIST OF ROCK...MUD...VEGETATION AND 
OTHER LOOSE MATERIALS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CHELAN...STAYMAN...MANSON AND CHELAN FALLS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4793 12018 4791 11994 4786 11992 4778 11999
      4776 12008 4779 12018

$$

RP

968 
WGUS76 KOTX 142142
FFSOTX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
242 PM PDT THU AUG 14 2014

WAC007-142145-
/O.EXP.KOTX.FF.W.0019.000000T0000Z-140814T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHELAN WA-
242 PM PDT THU AUG 14 2014

...THE FLASH FLOOD WARNING FOR EAST CENTRAL CHELAN COUNTY WILL EXPIRE
AT 245 PM PDT...

THE BULK OF THE HEAVY RAIN HAS FROM SHOWERS AND THUNDERSTORMS MOVING 
THROUGH THE AREA HAS ENDED. THIS FLASH FLOOD WARNING WILL BE ALLOWED 
TO EXPIRE BUT IT NEEDS TO BE NOTED THAT THIS AREA REMAINS UNDER BOTH 
A FLOOD WARNING UNTIL 7 PM THURSDAY AND A FLASH FLOOD WATCH THROUGH 
FRIDAY EVENING. 

LAT...LON 4793 12018 4791 11994 4786 11992 4778 11999
      4776 12008 4779 12018

$$

RP

Area Forecast Discussion
National Weather Service Spokane WA
426 AM PDT THU AUG 14 2014

.SYNOPSIS...
A slow moving low pressure system will result in continued showers
and thunderstorms through Friday. Some storms could be strong
producing very heavy rain...hail...and gusty winds. Seasonal
temperatures and drier conditions is a good bet for next weekend
into early next week.

&&

.DISCUSSION...
Today through Friday...A closed low over North Central Oregon will
remain nearly stationary today and then slowly track into
Northeast Washington on Friday. This will result in a continuation
of showers and thunderstorms over the Inland Northwest. Overall
today with the low over North Central Oregon there will be higher
shear over the Idaho Panhandle and adjacent portion of Eastern
Washington. This could lead to stronger cells with uncapped CAPE
values of 500-1000 J/KG. Hail will be the main threat from the
stronger cells.  On Friday with the cold core of the low over the
area...and very moist low levels...shower activity is expected to
be widespread with isolated thunderstorms in the valleys and
scattered thunderstorms in the mountains. Slow moving
thunderstorms in the Cascades will result in a continued threat
for flash flooding especially over burn scar areas. JW

Friday night through Saturday: The Low will continue to impact
the region as it slowly moves across the Inland Northwest. The
moisture and instability associated with the Low will interact
with the afternoon high temperatures and bring the chance of
isolated thunderstorms and rain showers to the Inland Northwest
for Friday. Localized high winds and heavy downpours possible with
stronger cells in this pattern. Locations outside of these cells
could see a a few hundredths of an inch of rain over the period.
The Low is expected to exit the region by late Saturday afternoon
and decrease the threat of showers and thunder to the northern and
eastern mountains. Temperatures will range from the upper 70s and
low 80s on Friday to mid 80s to low 90s on Friday.

Sunday through Thursday: As Low continues to skirt through
Northern Montana, models are showing potential for isolated
showers in the northern mountains with a slight chance of a
thunderstorm. A quieter weather will begin to build into a region
as a slight Northwest oriented zonal flow pattern will build into
the region. This is expected to lead to a fairly precip free
pattern except for an occasional shower forming along the Canadian
Border. Wednesday would be be the best chance for widespread
precip and thunderstorms as a trough clips the northern regions
of Washington and Idaho. Temperatures are expected to be on the
warmer side of the season normals and drop to near the normals on
Wednesday and Thursday. /JDC

&&

.AVIATION...
12Z TAFS: Showers and thunderstorms will continue over the region
through tonight. CIGS should remain generally VFR...although brief
MVFR can not be ruled out under the cores of stronger storms.
Storms will produce heavy rain and the potential for small hail.
JW

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        80  61  78  62  84  62 /  70  50  70  30  20  10
Coeur d'Alene  80  58  77  59  81  59 /  70  60  70  30  20  10
Pullman        77  55  78  56  82  55 /  70  60  70  20  10  10
Lewiston       83  63  84  65  90  66 /  60  60  60  20  10  10
Colville       82  55  82  56  86  56 /  70  60  70  60  30  20
Sandpoint      79  55  74  53  77  52 /  70  70  70  60  30  20
Kellogg        76  57  72  58  76  58 /  70  70  70  50  40  10
Moses Lake     81  61  83  62  90  63 /  70  40  30  20  10  10
Wenatchee      79  66  83  67  89  69 /  70  50  50  40  10  10
Omak           81  59  84  65  89  64 /  70  50  60  50  20  10

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...Flash Flood Watch through Friday evening for East Slopes
     Northern Cascades-Okanogan Valley-Wenatchee Area.

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SPOKANE WA
524 AM PDT THU AUG 14 2014

IDZ001>004-026-027-WAZ031>038-041>044-151230-
NORTHERN PANHANDLE-COEUR D'ALENE AREA-IDAHO PALOUSE-
CENTRAL PANHANDLE MOUNTAINS-LEWISTON AREA-
LEWIS AND SOUTHERN NEZ PERCE COUNTIES-NORTHEAST BLUE MOUNTAINS-
LOWER GARFIELD AND ASOTIN COUNTIES-WASHINGTON PALOUSE-
MOSES LAKE AREA-UPPER COLUMBIA BASIN-SPOKANE AREA-
NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS-WENATCHEE AREA-
EAST SLOPES NORTHERN CASCADES-OKANOGAN VALLEY-WATERVILLE PLATEAU-
524 AM PDT THU AUG 14 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH IDAHO...
NORTH CENTRAL IDAHO...CENTRAL WASHINGTON...EAST CENTRAL
WASHINGTON...NORTH CENTRAL WASHINGTON...NORTHEAST WASHINGTON AND
SOUTHEAST WASHINGTON.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL CONTINUE TODAY. STORMS WILL BE VERY
WET AND BURN SCAR AREAS IN THE CASCADES WILL REMAIN SUSCEPTIBLE
TO DEBRIS FLOWS AND FLASH FLOODING. SOME STORMS WILL ALSO BE
CAPABLE OF PRODUCING SMALL HAIL.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH TUESDAY

SHOWERS AND THUNDERSTORMS WILL CONTINUE FRIDAY. STORMS WILL BE VERY
WET AND BURN SCAR AREAS IN THE CASCADES WILL REMAIN SUSCEPTIBLE
TO DEBRIS FLOWS AND FLASH FLOODING. SOME STORMS WILL ALSO BE
CAPABLE OF PRODUCING SMALL HAIL.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
917 AM PDT THU AUG 14 2014

...TIME...  ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
...DATE...  ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0615 AM     DEBRIS FLOW      15 NW LUCERNE           48.38N 120.79W
08/13/2014                   CHELAN             WA   PUBLIC

            DEBRIS FLOW AT THIMBLEBERRY CREEK (MILE 7.5
            STEHEKIN VALLEY RD, 48.371297, -120.760567)
            AND AT STEHEKIN VALLEY RANCH (MILE 9.2,
            48.375859, -120.789234). 3 LARGE CULVERTS
            AND CREEK CHANNELS ARE FILLED WITH DEBRIS.
            STEHEKIN VALLEY ROAD WASHED OUT AND
            IMPASSABLE. SEVERAL SMALLER SLIDES BETWEEN
            THESE POINTS.

&&

NWS SPOKANE WA
IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
926 AM PDT THU AUG 14 2014

...TIME...  ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
...DATE...  ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0900 AM     DEBRIS FLOW      15 NE TELMA             47.98N 120.56W
08/13/2014                   CHELAN             WA   PUBLIC

            POPE CREEK (47.977548, -120.563033) 2FT OF
            MUD OVER ENTIAT RIVER RD ON EAST END OF
            DUNCAN FIRE AND DEPOSITED MUD AROUND HOMES
            AT BOTTOM.

&&

NWS SPOKANE WA
IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SPOKANE WA
935 AM PDT THU AUG 14 2014

...TIME...  ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
...DATE...  ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1030 PM     DEBRIS FLOW      4 S CARLTON             48.19N 120.09W
08/12/2014                   OKANOGAN           WA   OTHER FEDERAL

            ROUTE 153 IS CLOSED @ COW CREEK DUE TO A
            MUDSLIDE APPROXIMATELY 1 FOOT DEEP COVERING 80 FEET
            OF ROADWAY. SLIDE CROSSED THE ROAD AND RAN RIGHT
            INTO THE RIVER.
&&

NWS SPOKANE WA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
948 AM PDT THU AUG 14 2014

...TIME...  ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
...DATE...  ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0100 AM     FLASH FLOOD      1 N METHOW              48.14N 120.00W
08/13/2014                   OKANOGAN           WA   OTHER FEDERAL

            FRENCH CREEK AT BURMA ROAD (48.137331,
            -120.002058) FLOODED SENDING WATER AND SOME
            DEBRIS ONTO PRIVATE PROPERTY AND UP TO AT
            LEAST 4 HOMES.

&&

NWS SPOKANE WA
IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
955 AM PDT THU AUG 14 2014

...TIME...  ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
...DATE...  ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0100 AM     DEBRIS FLOW      9 E TWISP               48.37N 119.92W
08/13/2014                   OKANOGAN           WA   PUBLIC

            SOME MUD/ROCKS WASHED ON TO ROUTE 20 NEAR
            LOUP LOUP PASS FROM FRAZER CREEK.
            MOTORCYCLIST HAD AN ACCIDENT WHEN TRYING TO
            DRIVE THROUGH MUD/WATER OVER ROADWAY.

&&

NWS SPOKANE WA
IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
1009 AM PDT THU AUG 14 2014

...TIME...  ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
...DATE...  ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1000 AM     DEBRIS FLOW      3 SSW METHOW            48.08N 120.02W
08/14/2014                   OKANOGAN           WA   OTHER FEDERAL

            DEBRIS FLOWING FROM SMALL DRAINAGES ONTO
            ROUTE 153 BETWEEN BLACK CANYON ROAD AND
            SQUAW CREEK ROAD. SQUAW CREEK ROAD WASHED
            OUT ~5 MILES WEST OF 153. AREA PART OF
            CARLTON COMPLEX BURN SCAR.

&&

NWS SPOKANE WA
IRIS SYSTEM