Flash Flood Warning 12, NWS Spokane, WA

100 
WGUS76 KOTX 262205
FFSOTX

Flash Flood Statement
National Weather Service Spokane WA
305 PM PDT Mon Jun 26 2023

WAC047-262215-
/O.EXP.KOTX.FF.W.0012.000000T0000Z-230626T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Okanogan WA-
305 PM PDT Mon Jun 26 2023

...FLASH FLOOD WARNING FOR THE CUB CREEK BURN SCAR WILL EXPIRE AT 
315 PM PDT THIS AFTERNOON FOR NORTH CENTRAL OKANOGAN COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flood Watch remains in effect until 900 PM PDT for a portion of 
North Central Washington.

LAT...LON 4881 12010 4871 11998 4852 12001 4852 12025
      4868 12035 4877 12032

$$

JCLEV

Area Forecast Discussion
National Weather Service Spokane WA
1207 PM PDT Mon Jun 26 2023

.SYNOPSIS...
Today, tomorrow, and Wednesday will feature high temperatures in
the 80s with chances for afternoon and evening thunderstorms.
Warmer and drier weather will arrive Thursday and persist into the
weekend. Lowland communities in north Idaho and eastern Washington
will climb into the 90s by Saturday. Dry and hot weather will
likely persist into the July Fourth holiday.

&&

.DISCUSSION...

Today through Wednesday: Our weather pattern for early in the
work week will be similar to what we experienced over the weekend.
Afternoon high temperatures will be mainly in the 80s Monday,
Tuesday, and Wednesday, and there will be scattered showers and
thunderstorms each afternoon and evening. With an Omega Block over
western North America, the Pacific Northwest will remain stuck in
between the southern branch of the Polar Jet diving into southern
California and the northern branch in northern B.C. and Alberta.
Ensembles are suggesting a gradual increase in deep atmospheric
moisture today, tomorrow, and Wednesday. HREF and ECMWF ensembles
agree that precipitable water values will exceed 0.80 inches this
afternoon and creep to near an inch by Tuesday and Wednesday under
a weak and elongated upper level trough anchored over Washington
and Oregon.

We have issued another Flash Flood Watch for the north Washington
Cascades for this afternoon and evening. Our high risk burn scars
of Chelan and western Okanogan counties share Flash Flood Guidance
(FFG) of 0.30 inches of rain in 30 minutes or a half inch in an
hour. With easterly 700-500mb wind flowing into the north
Cascades, increasing precipitable water values, surface based CAPE
values up to 1000 J/Kg, and weak storm steering flow, the
environment will favor slow moving thunderstorms capable of
exceeding FFG.

As precipitable water values increase today through Wednesday,
showers and thunderstorms will become tied to the mountainous
terrain less. Of course the lift provided by the mountainous
terrain will lead to the highest probabilities over the mountains
the next few days, but the lowlands of the Columbia Basin will
also have a shot of storms as surface dewpoints increase well
into the 40s and 50s today, tomorrow and Wednesday. Our forecast
calls for a 20 to 30 percent chance of showers and thunderstorms
this afternoon in the Columbia Basin and similar probabilities
will spread into the Palouse and Spokane area Tuesday and
Wednesday. /GKoch

Thursday through Sunday:
Shower chances of 20-30% or less will continue into Thursday
afternoon across far NE WA and N ID with the potential for isolated
embedded thunderstorms as well. A generally zonal westerly flow will
then be in place for Friday and the weekend. Other than some locally
breezy conditions, the main impacts for this portion of the extended
forecast will be heat related. Daytime temperatures are anticipated
to run about 10 degrees above normal, with highs around 90 near
Spokane, low 90s for Wenatchee, and in the mid-to-upper 90s around
Lewiston. /KD

&&

.AVIATION...
18Z TAFs: Showers and thunderstorms between 18-03z will be the
most concentrated over the north Washington Cascasdes around Omak,
Winthrop, and Chelan (30%). Airports along the Washington- Idaho
border will be less favored with Spokane, Coeur d'Alene, Pullman,
and Lewiston having less than a 20 percent chance of showers and
thunderstorms this afternoon. Pullman and Lewiston have a 30%
chance of showers and thunderstorms after 12Z Tuesday. /Butler

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        84  58  84  59  84  59 /  10  10  20  20  20  10
Coeur d'Alene  84  58  83  59  82  59 /  10  10  20  30  30  20
Pullman        81  56  78  55  78  54 /  10  20  30  30  30  10
Lewiston       89  64  86  64  87  63 /  20  20  40  30  40  10
Colville       84  53  86  55  85  55 /  20  20  30  30  40  20
Sandpoint      82  55  82  57  81  57 /  10  10  40  40  50  30
Kellogg        79  58  77  59  77  59 /  20  20  50  40  60  20
Moses Lake     90  59  89  60  90  61 /  20  20  10  20  10  10
Wenatchee      87  64  88  65  89  65 /  30  20  20  10  10  10
Omak           89  59  91  61  91  61 /  30  20  20  10  20  10

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...Flood Watch from 1 PM PDT this afternoon through this evening
     for Central Chelan County-Okanogan Valley-Wenatchee Area-
     Western Chelan County-Western Okanogan County.

&&

Special Weather Statement
National Weather Service Spokane WA
1220 PM PDT Mon Jun 26 2023

IDZ004-262000-
Central Panhandle Mountains ID-
1220 PM PDT Mon Jun 26 2023

...A strong thunderstorm will impact portions of northeastern Latah
County through 100 PM PDT...

At 1219 PM PDT, Doppler radar was tracking a strong thunderstorm near
Bovill, or 27 miles south of St. Maries, moving northwest at 10 mph.

HAZARD...Half inch hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

This storm will remain over mainly rural areas of northeastern Latah
County, including Highway 3.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4685 11634 4692 11656 4701 11647 4692 11633
      4687 11633
TIME...MOT...LOC 1919Z 121DEG 12KT 4693 11641

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...<30 MPH

JW