Severe Thunderstorm Warning 2, NWS Spokane, WA

506 
WWUS56 KOTX 240222
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
722 PM PDT WED JUN 23 2010

WAC017-025-043-047-240315-
/O.CON.KOTX.SV.W.0002.000000T0000Z-100624T0315Z/
GRANT WA-LINCOLN WA-DOUGLAS WA-OKANOGAN WA-
722 PM PDT WED JUN 23 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM PDT
FOR EXTREME SOUTHEASTERN OKANOGAN...EAST CENTRAL DOUGLAS...
NORTHWESTERN LINCOLN AND NORTHEASTERN GRANT COUNTIES...

AT 718 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A RAPIDLY STRENGTHENING SEVERE THUNDERSTORM CAPABLE OF 
PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 
MPH.  THIS STORM WAS LOCATED NEAR HARTLINE...OR 39 MILES NORTH OF 
MOSES LAKE...MOVING NORTHEAST AT 5 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GRAND
COULEE...ELMER CITY...ELECTRIC CITY AND COULEE DAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

&&

LAT...LON 4804 11892 4786 11874 4757 11918 4767 11940
      4802 11920
TIME...MOT...LOC 0222Z 221DEG 6KT 4769 11920

$$

FRIES

464 
WWUS56 KOTX 240252
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
752 PM PDT WED JUN 23 2010

WAC017-025-043-047-240315-
/O.CON.KOTX.SV.W.0002.000000T0000Z-100624T0315Z/
GRANT WA-LINCOLN WA-DOUGLAS WA-OKANOGAN WA-
752 PM PDT WED JUN 23 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM PDT
FOR EXTREME SOUTHEASTERN OKANOGAN...NORTHEASTERN DOUGLAS...
NORTHWESTERN LINCOLN AND NORTHEASTERN GRANT COUNTIES...

AT 748 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR HARTLINE...OR 45 MILES NORTH OF MOSES LAKE...MOVING
NORTHEAST AT 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GRAND
COULEE...ELMER CITY...ELECTRIC CITY AND COULEE DAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

&&

LAT...LON 4786 11874 4766 11905 4772 11924 4802 11920
      4804 11892
TIME...MOT...LOC 0252Z 233DEG 15KT 4775 11903

$$

FRIES

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
520 PM PDT WED JUN 23 2010

.SYNOPSIS...
A WEAK DISTURBANCE WILL PASS THROUGH THE REGION TONIGHT BRINGING
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS. THIS ACTIVITY WILL
LINGER INTO THURSDAY OVER EASTERN WASHINGTON AND NORTH IDAHO. THE
WEEKEND IS SHAPING UP TO BE MAINLY DRY WITH WARMER TEMPERATURES.

&&

.DISCUSSION...
TONIGHT AND THURSDAY...WATER VAPOR SATELLITE AS OF 20Z SHOWS A
SHORT WAVE TROUGH NEARING THE CASCADES. AHEAD OF THIS TROUGH A
MIXTURE OF BOTH SFC BASED AND ELEVATED INSTABILITY EXISTS. THE
BEST CHANCES FOR SURFACE BASED CONVECTION THROUGH THE EVENING WILL
BE FROM THE CASCADES INTO CENTRAL WASHINGTON AS WELL AS NEAR THE
CANADIAN BORDER. SLIGHTLY COOLER 500MB TEMPS OF -15C COMPARED TO
-13C DOWN OVER SE WASHINGTON WILL LEAD TO NO CONVECTIVE
INHIBITION WHERE VISIBLE SATELLITE THIS AFTERNOON HAS SHOWN SFC
BASED CUMULUS DEVELOPMENT. THE SECONDARY AREA MOST LIKELY FOR SFC
BASED CONVECTION IS OVER OUR SOUTHEAST ZONES...FOR THE
BLUES...CAMAS PRAIRIE...AND CENTRAL PANHANDLE MTNS. LAPS DATA HERE
SHOWS THE CAP RETREATED FROM THE SOUTH WITH SFC BASED CONVECTION
BEGINNING TO SHOW UP OVER THE CLEARWATERS. THIS AREA ALSO HAS
BETTER SHEAR WITH 0-6KM VALUES OF 25-35 KTS SO A FEW STRONGER
CELLS ARE STILL POSSIBLE THROUGH THE EVENING.

ELSEWHERE...THE THREAT FOR ELEVATED CONVECTION WILL INCREASE THIS
EVENING AS THE SHORT WAVE TRACKS EAST INTO CENTRAL AND EASTERN
WASHINGTON BRINGING AN INCREASE IN MID LEVEL MOISTURE WITH 700-500
THETA E LAPSE RATES NEAR 0 C/KM. THIS IS SUFFICIENT TO POSSIBLE
BRING A FEW LIGHTNING STRIKES. OVERNIGHT AS THE SHORT WAVE MOVES
INTO EASTERN WA/N IDAHO DRIER WESTERLY FLOW SHOULD KICK IN FOR THE
LEE OF THE CASCADES...WHILE SCATTERED SHOWERS AND ISOLATED
NOCTURNAL THUNDERSTORMS ARE EXPECTED ELSEWHERE.

ON THURSDAY DRIER AIR MOVES INTO THE AREA IN THE 700-500MB LAYER.
HOWEVER LINGERING INSTABILITY OVER EASTERN WA/N IDAHO WILL LIKELY
TRIGGER A ROUND OF SFC BASED CONVECTION WITH UNCAPPED CAPES OF
500-1000 J/KG. A FEW STORMS MAY BECOME STRONG WITH 0-6KM SHEAR
VALUES OF 20-35 KTS. JW

THURSDAY NIGHT THROUGH SATURDAY EVENING...THIS PERIOD WILL SEE THE
WEATHER TURN DRIER WITH TIME AS THE LAST VESTIGES OF THE
PERSISTENT UPPER LEVEL TROUGH EXIT THE INLAND NW. THURSDAY NIGHT
LIKELY POSES THE GREATEST THREAT FOR PRECIPITATION...AS A COMPACT
SHORTWAVE TROF DRIFTS THROUGH THE EXTREME NE CORNER OF WASHINGTON
AND THE NORTH IDAHO PANHANDLE BETWEEN 00Z-06Z. THE POTENTIAL
INSTABILITY PARAMETERS STILL LOOK CONDUCIVE FOR THUNDERSTORMS
BASED ON CAPE VALUES...HOWEVER THE 0-6KM WIND SHEAR VALUES ARE
FAIRLY WEAK. THE INSTABILITY AND SHEAR VALUES ACTUALLY APPEAR MUCH
MORE FAVORABLE SOUTH AND EAST OF THE CAMAS PRAIRIE WHERE TODAYS
MID-LEVEL THETA-E RIDGE AXIS IS EXPECTED TO GET HUNG UP. IN ANY
CASE...WE SUSPECT ANY CONVECTION WHICH FIRES WILL RAPIDLY WEAKEN
WITH THE SETTING SUN AND THE PASSAGE OF THE TROF AXIS INTO NW
MONTANA/SOUTHERN ALBERTA.

AFTER A FAIRLY QUIET REMAINDER OF THE NIGHT AND EARLY FRIDAY
MORNING...YET ANOTHER TROF IS EXPECTED TO PASS THROUGH THE INLAND
NW. THIS ONE IS FORECAST TO CROSS THE CASCADES BY 18Z FRIDAY AND
MOVE INTO WESTERN MONTANA BY 00Z. THIS SYSTEM IS BEGINNING TO LOOK
LIKE A NON-PLAYER OTHER THAN BRINGING SOME INCREASING WESTERLY
WINDS TO THE CASCADES AND COLUMBIA BASIN. BY THIS TIME THE BULK OF
THE GOOD LOW-LEVEL MOISTURE/THETA-E RIDGE AXIS IS WELL SOUTH AND
EAST OF OUR CWA. MODELS SOUNDING AHEAD OF THE TROF LOOK
UNIMPRESSIVE WITH THE DEPTH OF THE POTENTIAL INSTABILITY PALING IN
COMPARISON TO TODAY AND THURSDAY. IN FACT...IT MAY NOT BE DEEP
ENOUGH TO SUPPORT ANYTHING OTHER THAN A FEW SHOWERS...PRIMARILY
OVER THE IDAHO PANHANDLE.

FOR SATURDAY...THE ENTIRE INLAND NW WILL SEE A DRY DAY AS ANY
SEMBLANCE OF AN UPPER LEVEL TROF WILL BE WELL EAST OF THE REGION.
MEANWHILE...A LOW AMPLITUDE UPPER LEVEL RIDGE WILL BEGIN TO BUILD
OVER THE PAC NW. FX

SATURDAY NIGHT THROUGH WEDNESDAY NIGHT...WARM AND DRY
CONDITIONS WILL PREVAIL SUNDAY AND MONDAY THEN A COOL FRONT WILL
BRING SOME COOLING AND CHANCE FOR THUNDERSTORMS MONDAY EVENING
THROUGH WEDNESDAY. MONDAY HAS THE POTENTIAL TO BE THE WARMEST DAY
SO FAR THIS SEASON.

THE DEEP LOW CURRENTLY SPINNING ALONG THE WESTERN REACHES OF
THE ALEUTIAN ISLANDS WILL HAVE MIGRATED TO 140W BY SATURDAY. THIS
LOW WILL UNDERGO MODEST AMPLIFICATION AND DRIFT TOWARD THE BRITISH
COLUMBIA COAST SUNDAY AND MONDAY RESULTING IN MODERATE HEIGHT
RISES DOWNSTREAM...MOSTLY OVER THE ROCKIES AND CENTRAL PLAINS. THE
PAC NW WILL BE UNDER A BROAD SW FLOW DUE TO OUR WESTWARD PLACEMENT
TO THE ACTUAL RIDGE AXIS...HOWEVER THE POLAR JET WILL BE SHOVED
NORTH INTO BC ALLOWING A SUBSTANTIAL AMOUNT OF 850-700MB WARMING
SUNDAY INTO MONDAY. GFS/EC 850MB TEMPERATURES WILL BE WARMING NEAR
21 CELSIUS MONDAY AFTN. WITH LITTLE IN THE WAY OF ORGANIZED
MOISTURE OR CLOUDS AND SUFFICIENT MECHANICAL MIXING TO 800MB OR
HIGHER...WE ARE LOOKING FOR WIDESPREAD UPPER 70'S TO LOWER 80'S
SUNDAY THEN 80'S TO LOW 90'S MONDAY. THERE IS GENERALLY STRONG
AGREEMENT AMONGST THE GFS/GEFS/ECWMF THUS CONFIDENCE IS NEAR TO
ABOVE NORMAL THAT THIS WILL BRING ONLY OUR SECOND DAY IN JUNE
WHEN ABOVE NORMAL TEMPERATURES WERE ACHIEVED.

MONDAY EVENING THROUGH WEDNESDAY NIGHT...THE UPPER-LEVEL TROUGH
WILL CONTINUE TO DRIFT TOWARD THE COAST AND SHORTWAVE ENERGY
PIVOTING AROUND THE MEAN TROUGH WILL LIFT INTO BRITISH COLUMBIA.
THE FIRST OF THE SHORTWAVES WILL PUSH A COLD FRONT ACROSS THE PAC
NW. WHILE CONFIDENCE IS HIGH ON THE EVENTS TO COME...THERE IS
QUITE A BIT OF UNCERTAINTY ON THE EXACT TIMING AND STRENGTH WITH
SOME GUIDANCE SUGGESTING THE FRONT WILL MOVE THROUGH AS EARLY AS
MONDAY NIGHT AND OTHERS....TUESDAY/WEDNESDAY. FORECAST WILL LEAN
TOWARD THE LATTER OR TUESDAY. ACCOMPANYING THE FRONT...THERE WILL BE A
RICH MOISTURE SOURCE STREAMING IN WITH PWATS INCREASING TO
0.75-0.90". AS A RESULT...THUNDERSTORM CHANCES WILL BE INCREASING
THROUGH THE PERIOD WITH THE HIGHEST THREATS FOCUSING ACROSS THE
HIGHER TERRAIN AND DURING THE LATE AFTERNOON/EVENING HOURS.
TEMPERATURES WILL REMAIN WARM BUT BE COOLING CLOSER TO NORMAL ONCE
THE FRONT PUSHES THROUGH. OVERALL...WEATHER CONDITIONS ARE
BEGINNING TO LOOK A BIT MORE JUNE-LIKE. /SB

&&

.AVIATION...
A WEAK WEATHER DISTURBANCE WILL TRACK ACROSS THE REGION THIS EVENING
AND OVERNIGHT BRINGING -SHRA AND TSRA TO THE FORECAST AREA.   THE
BULK OF THE THUNDERSTORM ACTIVITY WILL DEVELOP OVER THE MOUNTAINS AND
WEAKEN WHILE MOVING INTO THE VALLEYS...HOWEVER AS THE MAIN
UPPER-LEVEL FRONT PRESSES THROUGH...THUNDER CHANCES WILL INCREASE
WEST TO EAST ACROSS ALL TERMINALS.  THE FRONT IS EXPECTED TO CROSS
THE CASCADES 00-04Z AND CONTINUE THROUGH NORTHERN IDAHO 06-12Z.  WE
ARE ALSO MONITORING A SECOND CLUSTER OF THUNDERSTORMS DEVELOPING
AND TRACKING TO THE NORTH OFF THE BLUE MTNS.  THESE WILL BE IN VCNTY
KLWS-KPUW AOB 03Z.  ISOLD -SHRA AND TSRA WILL ONCE AGAIN BE POSSIBLE
MAINLY ACROSS THE THE EASTERN MOUNTAINS THURSDAY AFTERNOON.  /SB

&&

.PRELIMINARY POINT TEMPS/POPS...
SPOKANE        57  77  55  74  51  73 /  30  20  10  10   0   0
COEUR D'ALENE  56  76  56  74  51  72 /  40  20  20  10  10   0
PULLMAN        55  75  54  72  49  73 /  30  30  20  10   0   0
LEWISTON       63  82  60  78  55  79 /  30  20  20  10   0   0
COLVILLE       54  80  54  78  51  76 /  40  40  30  10  10   0
SANDPOINT      53  75  53  73  50  71 /  40  40  40  20  20  10
KELLOGG        56  73  54  69  48  71 /  40  50  30  20  10   0
MOSES LAKE     56  86  56  80  52  81 /  20  10  10   0   0   0
WENATCHEE      61  84  57  79  54  80 /  20   0   0   0   0   0
OMAK           55  85  55  80  53  79 /  20  10  10   0   0   0

&&

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

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SPOKANE WA
603 AM PDT WED JUN 23 2010

IDZ001>004-026-027-WAZ031>038-041>044-241315-
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-
603 AM PDT WED JUN 23 2010

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
715 PM PDT WED JUN 23 2010

WAZ035-044-240300-
GRANT WA-LINCOLN WA-DOUGLAS WA-
715 PM PDT WED JUN 23 2010

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHEASTERN GRANT COUNTY IN CENTRAL WASHINGTON
  NORTHWESTERN LINCOLN COUNTY IN EAST CENTRAL WASHINGTON
  EAST CENTRAL DOUGLAS COUNTY IN NORTH CENTRAL WASHINGTON

UNTIL 800 PM PDT

AT 712 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR HARTLINE..MOVING NORTHEAST AT 15 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING.

LOCATIONS IMPACTED INCLUDE...
   HARTLINE...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4800 11918 4787 11882 4758 11915 4767 11938
TIME...MOT...LOC 0215Z 209DEG 12KT 4771 11920

FRIES