Flood in Washington, June 1 to 5, 2008

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SPOKANE WA
1050 PM PDT SAT MAY 31 2008

...UPDATED AVIATION...

.SYNOPSIS...
AN UNSTABLE UPPER LEVEL LOW CURRENTLY JUST OFF THE WASHINGTON
COAST WILL APPROACH THE INLAND NORTHWEST THROUGH THE WEEKEND.
UNSTABLE CONDITIONS ASSOCIATED WITH THIS LOW WILL CONTINUE TO
RESULT IN CHANCES OF THUNDERSTORMS....ESPECIALLY DURING THE
AFTERNOON AND EVENING HOURS...WITH WIDESPREAD RAIN NORTH AND EAST
OF THE COLUMBIA BASIN ON SUNDAY.

&&

.DISCUSSION...
REST OF TONIGHT...THE TIMING OF THE SHORT-WAVE TROF THAT HAS BEEN
ADVERTISED TO MOVE INTO THE AREA FOR THE PAST FEW DAYS IS STILL ON
TRACK AND WILL MOVE INTO ERN WA OVERNIGHT. SCATTERED TSRA MOVING N
OFF THE HIGHER TRRN OF NE OREGON AND INTO THE LEWISTON AREA WAS THE
FOCUS EARLY IN THE SHIFT...WITH THE MAIN THREATS BEING SMALL HAIL
AND LOCAL FLOODING. THE SMALL STREAM FLOOD ADVSY FOR GARFIELD AND
ASOTIN COUNTIES WAS ALLOWED TO END AT AROUND 8 PM. A SECONDARY
BATCH OF TSRA SPREAD N INTO THE PALOUSE AND SPOKANE AREA...AND IS
NOW WEAKENING RAPIDLY. WEVE BEEN COVERING THIS LATER PCPN WITH
NOWCASTS...FOCUSING ON LOCALLY HEAVY RAIN-RATES AND PONDING OF
WATER. THOUGH THE RADAR PCPN ESTIMATES HAVE BEEN IMPRESSIVE IN
ISOLATED SPOTS...CALLS TO SPOTTERS AND COUNTY SHERIFFS HAVE YIELDED
NO FLOODING PROBLEMS. AND EVEN THOUGH LG-SCALE ASCENT WITH THE
AFOREMENTIONED SHORT-WAVE WILL PERSIST THE REST OF THE NIGHT...THE
END OF AFTERNOON HEATING SHOULD SIGNIFICANTLY CUT BACK ON ANY
THUNDER AND HEAVY RAIN THREAT THE REST OF THE NIGHT. THOUGH WELL
KEEP FAIRLY HIGH POPS IN THE FCST FOR THE OVERNIGHT HOURS...WELL
KEEP PCPN AMNTS LESS THAN ONE TENTH INCH FOR MOST LOWER ELEVATIONS.
BZ

&&

.AVIATION...
SEVERAL AVIATION CONCERNS THROUGH 06Z/2ND. FIRST BEING
THUNDERSTORMS OVER NE OREGON THAT WILL MOVE NE NEAR OR OVER
KLWS/KPUW BTWN 06Z-010Z. THUNDER THREAT SHOULD SUBSIDE IN THESE
AREAS OVERNIGHT...BUT THEN TSTMS ARE EXPECTED TO REDEVELOP
TOMORROW AFTERNOON. MEANWHILE A LARGE AREA OF RAIN WILL MOVE NORTH
OUT OF NE OREGON INTO EASTERN WA/N IDAHO OVERNIGHT INTO TOMORROW
MORNING WITH CIGS LOWERING TO MVFR WITH LOCAL IFR CIGS POSSIBLE.
IFR CIGS ARE MOST LIKELY AT KGEG/KPUW WHERE LOW LEVEL UPSLOPE FLOW
WILL EXIST.

&&

.PRELIMINARY POINT TEMPS/POPS...
SPOKANE        53  67  51  68  47  67 /  60  70  30  20  10  20
COEUR DALENE  54  65  52  68  46  65 /  60  80  30  20  10  20
PULLMAN        53  69  50  66  44  65 /  60  60  30  20  10  20
LEWISTON       55  74  55  74  50  72 /  60  40  20  20  10  20
COLVILLE       50  64  47  72  47  71 /  50  80  30  30  10  20
SANDPOINT      50  61  49  70  47  63 /  50  80  30  40  10  20
KELLOGG        50  59  47  66  45  65 /  60  80  40  30  10  20
MOSES LAKE     53  78  54  74  50  73 /  40  10  10   0  10  30
WENATCHEE      55  74  56  77  53  69 /  40  10  10   0  10  30
OMAK           52  72  51  76  48  72 /  50  50  10  10  10  20

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...NONE.
WA...NONE.
&&

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE SPOKANE WA
1109 PM PDT SAT MAY 31 2008

IDZ001>004-026-027-WAZ031>038-041>044-011300-
NORTHERN PANHANDLE-COEUR DALENE 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-
1109 PM PDT SAT MAY 31 2008

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...TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.