Severe Thunderstorm Warning 4, NWS Spokane, WA

581 
WWUS56 KOTX 290454
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
954 PM PDT MON JUN 28 2010

IDC057-061-069-WAC003-075-290530-
/O.CON.KOTX.SV.W.0004.000000T0000Z-100629T0530Z/
LEWIS ID-WHITMAN WA-LATAH ID-NEZ PERCE ID-ASOTIN WA-
954 PM PDT MON JUN 28 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM PDT
FOR EASTERN ASOTIN...NEZ PERCE...SOUTHWESTERN LATAH...SOUTHEASTERN
WHITMAN AND NORTHWESTERN LEWIS COUNTIES...

AT 952 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 6 MILES NORTHWEST OF WAHA...OR 10 MILES SOUTH OF LEWISTON...
MOVING NORTHEAST AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ASOTIN...CLARKSTON HEIGHTS...WINCHESTER...CLARKSTON...LAPWAI...
REUBENS...CULDESAC...UNIONTOWN...COLTON...GENESEE...GIFFORD...
LENORE...PECK...JULIAETTA...SOUTHWICK...SPALDING AND KENDRICK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 4641 11630 4603 11672 4611 11699 4609 11730
      4673 11713 4660 11645 4650 11645 4650 11637
TIME...MOT...LOC 0453Z 207DEG 36KT 4626 11695

$$

FRIES

115 
WWUS56 KOTX 290529
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
1029 PM PDT MON JUN 28 2010

IDC057-061-069-WAC003-075-290538-
/O.EXP.KOTX.SV.W.0004.000000T0000Z-100629T0530Z/
LEWIS ID-WHITMAN WA-LATAH ID-NEZ PERCE ID-ASOTIN WA-
1029 PM PDT MON JUN 28 2010

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ASOTIN...NEZ PERCE...
SOUTHWESTERN LATAH...SOUTHEASTERN WHITMAN AND NORTHWESTERN LEWIS
COUNTIES WILL EXPIRE AT 1030 PM PDT...

THE THUNDERSTORM THAT NECESSITATED THE SEVERE THUNDERSTORM WARNING 
HAS WEAKENED BELOW SEVERE LIMITS AS IT HAS TRACKED NORTHEASTWARD 
TOWARD JULIAETTE AND KENDRICK IDAHO.  THE SEVERE THUNDERSTORM 
WARNING WILL BE ALLOWED TO EXPIRE AS SCHEDULED AT 1030 PM AS A 
RESULT.

LAT...LON 4641 11630 4603 11672 4611 11699 4609 11730
      4673 11713 4660 11645 4650 11645 4650 11637
TIME...MOT...LOC 0528Z 207DEG 36KT 4657 11672

$$

FRIES

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
657 PM PDT MON JUN 28 2010

.SYNOPSIS...
COOLER AIR WILL BEGIN TO MOVE INTO THE REGION ON TOMORROW...AND
BY WEDNESDAY LOW PRESSURE WILL PUSH TEMPERATURES BELOW AVERAGE.
THE BEST CHANCES FOR SHOWERS AND THUNDERSTORMS DURING THIS WEATHER
PATTERN CHANGE WILL BE THURSDAY INTO FRIDAY.

&&

.DISCUSSION...

UPDATE FOR TONIGHT...UPSTREAM CONVECTION HAS FIRED VERY QUICKLY
AND EFFICIENTLY OVER EASTERN OREGON THIS EVENING. MODEL SOUNDINGS
AS WELL AS THE 00Z KOTX RAOB INDICATE AN ABUNDANCE OF INSTABILITY
IN THE MID-LEVELS THAT SHOULD CONTINUE OVERNIGHT. IN
FACT...ALTHOUGH THE NAM IS A BIT MORE UNSTABLE THAN THE GFS...BOTH
MODELS SHOW REMARKABLE AGREEMENT ON THE PLACEMENT AND TIMING OF
THE INSTABILITY THROUGH THE NIGHTTIME HOURS. BOTH MODELS FOCUS THE
BEST INSTABILITY WELL ABOVE 700 MB...WITH DECENT POSITIVE AREA
INTERSECTING ALL THE WAY FROM THE -10C ISOTHERM UP THROUGH AND
PAST THE -30C ISOTHERM...SO CHARGE SEPARATION IS ALL BUT ASSURED
IN THESE SOUNDINGS. ADDITIONALLY...MODEL UNSTABLE LAYER SHEAR
PROFILES SUGGEST SOMEWHERE IN THE NEIGHBORHOOD OF 40 KTS OF
UNIDIRECTIONAL OR SLIGHTLY VEERING SHEAR PROFILE...SO THUNDERSTORM
CELLS UPSTREAM NOW SHOULD RETAIN AT LEAST SOME OF THEIR IDENTITY
AS THEY TRANSLATE NORTH-NORTHEASTWARD THROUGH THE EVENING AND
OVERNIGHT. CURRENT CONVECTION SEEMS TO BE FIRING ON THE NOSE OF A
700 MB AND 500 MB THETA-E RIDGE THAT SHIFTS QUICKLY FROM EASTERN
OREGON THIS EVENING INTO SOUTHEAST WASHINGTON LATER THIS
EVENING...AND THE IDAHO PANHANDLE BY MORNING. INTERACTION WITH
SOME AMOUNT OF LARGER SCALE LIFT VIA AN INCOMING SHORTWAVE TROUGH
THAT IS DIGGING AND BECOMING PROGRESSIVELY MORE NEUTRALLY-TILTED
THROUGH THE OVERNIGHT HOURS AND INTO TUESDAY WILL ADD SOME LIFT
VIA THE INCOMING RIGHT ENTRANCE REGION OF A 250 MB JET CORE...SO
PRECIPITATION AMOUNTS COULD BE RATHER HEAVY UNDER THE THUNDERSTORM
CORES. HOWEVER...MEAN LAYER WIND SPEEDS WITH THE CELLS SHOULD RUN
UPWARDS OF 50 KTS...SO CELLS WILL NOT LINGER IN ANY AREA LONG
ENOUGH TO BE A FLOODING CONCERN AT ALL. /FRIES

&&

.AVIATION...
THUNDERSTORMS OVER EASTERN OREGON WILL MOVE NORTH-NORTHEASTWARD
OVER THE EASTERN SITES TONIGHT. AS THE ATMOSPHERE DECOUPLES...WIND
GUSTS WITH THEM WILL BECOME LESS LIKELY AS THEY APPROACH...AND
THEY SHOULD BE RELATIVELY HIGH BASED. AS A RESULT...CONDITIONS AT
MOST LOCATIONS SHOULD STAY VFR OUTSIDE OF THE HEAVIEST
PRECIPITATION CORES. /FRIES

&&

.PRELIMINARY POINT TEMPS/POPS...
SPOKANE        58  77  50  73  47  69 /  30  20  10   0   0  20
COEUR D'ALENE  57  77  49  72  47  69 /  40  30  10  10   0  20
PULLMAN        56  75  48  72  44  67 /  50  20  20  10   0  20
LEWISTON       60  82  55  77  50  74 /  60  20  20  10   0  20
COLVILLE       55  81  47  77  44  73 /  20  10   0   0   0  30
SANDPOINT      54  78  46  72  42  68 /  30  30  10  10   0  30
KELLOGG        54  76  49  71  47  66 /  50  30  20  20   0  30
MOSES LAKE     57  80  50  78  48  75 /  10   0   0   0   0  20
WENATCHEE      60  76  52  77  51  72 /   0   0   0   0   0  20
OMAK           54  78  47  77  46  74 /   0   0   0   0   0  20

&&

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

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SPOKANE WA
907 PM PDT MON JUN 28 2010

IDZ003-004-026-027-WAZ031>033-291400-
IDAHO PALOUSE-CENTRAL PANHANDLE MOUNTAINS-LEWISTON AREA-
LEWIS AND SOUTHERN NEZ PERCE COUNTIES-NORTHEAST BLUE MOUNTAINS-
LOWER GARFIELD AND ASOTIN COUNTIES-WASHINGTON PALOUSE-
907 PM PDT MON JUN 28 2010

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

.DAY ONE...TONIGHT

THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE QUARTER SIZED
HAIL...WIND GUSTS TO 60 MPH...AND FREQUENT CLOUD TO GROUND
LIGHTNING THIS EVENING. SOME COMMUNITIES THAT MAY BE IMPACTED THIS
EVENING WILL BE ANATONE...WINCHESTER....LEWISTON...MOSCOW...AND ST
MARIES.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

IDZ001-002-WAZ034>038-041>044-291400-
NORTHERN PANHANDLE-COEUR D'ALENE AREA-MOSES LAKE AREA-
UPPER COLUMBIA BASIN-SPOKANE AREA-NORTHEAST MOUNTAINS-
OKANOGAN HIGHLANDS-WENATCHEE AREA-EAST SLOPES NORTHERN CASCADES-
OKANOGAN VALLEY-WATERVILLE PLATEAU-
907 PM PDT MON JUN 28 2010

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

.DAY ONE...TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.