741  
FXUS66 KOTX 062347  
AFDOTX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE SPOKANE WA  
447 PM PDT MON APR 6 2020  
   
SYNOPSIS
 
 
THE REMAINDER OF THE WORK WEEK WILL BE DRY AND WARMER. MANY  
LOCATIONS WILL EXPERIENCE HIGHS IN THE 60S TO 70S WEDNESDAY,  
THURSDAY, AND FRIDAY. TEMPERATURES WILL TREND A BIT COOLER OVER  
THE WEEKEND, AND THE CHANCE FOR SHOWERS WILL RETURN TO THE  
MOUNTAINOUS PORTIONS OF THE INLAND NORTHWEST.  
 

 
   
DISCUSSION
 
 
TONIGHT: WIDELY SCATTERED SHOWERS OVER THE CENTRAL AND SOUTHERN  
IDAHO PANHANDLE WILL DISSIPATE EARLY THIS EVENING WITH THE LOSS OF  
AFTERNOON HEATING. EVENING CASCADE GAP WINDS ARE EXPECTED TO BLOW  
IN PLACES LIKE WENATCHEE, ENTIAT, CHELAN, AND VANTAGE. IT WILL BE  
A RELATIVELY WEAK PUSH WITH SUSTAINED WEST WINDS OF 15 TO 20 MPH  
GUSTING UP TO 25 MPH. OUR SHELTERED VALLEYS AROUND AND NORTH OF  
SPOKANE MAY EXPERIENCE A BIT OF FOG TOWARD MORNING. THE FOG THAT  
DEVELOPS WILL LIKELY BE PATCHY. TEMPERATURES THIS AFTERNOON ARE  
RUNNING A GOOD 10 DEGREES OR MORE WARMER THAN YESTERDAY. DRIER  
GROUND AND HIGHER TEMPERATURE-DEWPOINT SPREADS THIS EVENING SHOULD  
LEAD TO LESS FOG DEVELOPMENT TONIGHT THAN LAST NIGHT.  
 
TUESDAY AND WEDNESDAY: THE LAST TEN TO FOURTEEN DAYS HAS PROVIDED  
THE INLAND NORTHWEST WITH A DOSE OF CHILLY AND SHOWERY WEATHER. WE  
ARE GOING TO BEGIN OUR SWING TOWARD DRY WEATHER AND ABOVE AVERAGE  
TEMPERATURES ON TUESDAY. AFTERNOON TEMPERATURES ON TUESDAY ARE  
EXPECTED TO BE IN THE UPPER 50S AND LOW 60S. WEDNESDAY SHOULD BE  
BE EVEN WARMER WITH MOST OF OUR LOWLANDS IN THE 60S. WEST WINDS ON  
TUESDAY WILL BE IN THE 10 TO 15 MPH RANGE WITH GUSTS AS HIGH AS  
25 MPH AROUND PULLMAN, RITZVILLE AND WENATCHEE. THE MAJORITY OF  
THE REGION SHOULD HAVE LIGHTER WINDS ON WEDNESDAY AS OUR HIGH  
PRESSURE RIDGE BUILDS OVER THE PACIFIC NORTHWEST. LOOK FOR A NORTH  
OR NORTHEAST WIND WEDNESDAY IN THE 5 TO 15 MPH RANGE WITH  
LOCALIZED GUSTS UP TO 20 MPH AROUND OMAK. /GKOCH  
 
THURSDAY THROUGH MONDAY: THURSDAY AND FRIDAY WILL LIKELY BE THE  
WARMEST DAYS OF THE WEEK AS THE UPPER RIDGE AXIS BUILDS OVERHEAD.  
LOOK FOR TEMPERATURES TO WARM INTO 60S ACROSS THE REGION, AND INTO  
THE 70S ACROSS THE LOWER COLUMBIA BASIN. THESE FORECAST HIGH  
TEMPERATURES ARE ON THE ORDER OF 10 DEGREES WARMER THAN NORMAL FOR  
THIS TIME OF YEAR.  
 
WE START TO SEE AN AMPLIFICATION OF THE UPPER TROUGH OVER THE  
CENTRAL US ON FRIDAY, FORCING THE WEST COAST RIDGE TO RETROGRADE  
WESTWARD. SHORTWAVE ENERGY WILL BEGIN TO SPILL DOWN THE BACKSIDE  
OF THE UPPER RIDGE AS A RESULT, STARTING AS EARLY AS FRIDAY BUT  
MORE LIKELY OVER THE WEEKEND. THE TIMING AND STRENGTH OF THESE  
SHORTWAVES ARE THE BIGGEST SOURCE OF UNCERTAINTY, AS THE OVERALL  
PATTERN IS NOW BETTER AGREED UPON AMONGST THE MODELS. THESE  
IMPULSES WILL BRING OUR NEXT CHANCE OF WIDESPREAD PRECIPITATION,  
MAINLY FAVORING THE CASCADES AND IDAHO PANHANDLE MOUNTAINS WITH  
LOWER CHANCES ACROSS THE LOWLANDS. SNOW LEVELS COULD DROP DOWN TO  
THE VALLEY FLOORS...BUT AGAIN THIS FORECAST COMES WITH A GOOD DEAL  
OF UNCERTAINTY. DEPENDING ON THE TRACK OF THESE WAVES, BREEZY  
WINDS MAY DEVELOP ACROSS THE LOWLANDS, INCLUDING GUSTY NORTH WINDS  
DOWN THE OKANOGAN VALLEY.  
DANG  
 

 
   
AVIATION
 
 
00Z TAFS: FLAT CUMULUS OVER SOUTHEAST WASHINGTON AND INTO THE  
IDAHO PANHANDLE WILL DISSIPATE THROUGH THE EVENING. THIS WILL  
LEAVE A THIN LAYER OF CIRRUS CLOUDS TOPPING OVER A BUILDING RIDGE  
OF HIGHER PRESSURE IN THE EASTERN PACIFIC. VFR CONDITIONS ARE  
EXPECTED FOR THE MAJORITY OF THE NIGHT. BY EARLY MORNING, PATCHY  
LOW CLOUDS AND FOG WILL BE POSSIBLE AROUND SPOKANE AND COEUR  
D'ALENE. FOG WILL QUICKLY BURN OFF BY MID MORNING. /SVH  
 

 
   
PRELIMINARY POINT TEMPS/POPS
 
 
SPOKANE 33 58 32 61 35 65 / 0 0 0 0 0 0  
COEUR D'ALENE 36 57 32 58 34 63 / 0 0 0 0 0 0  
PULLMAN 35 56 32 61 34 63 / 0 0 0 0 0 0  
LEWISTON 39 64 38 66 39 69 / 0 0 0 0 0 0  
COLVILLE 33 61 30 63 34 69 / 0 0 0 0 0 0  
SANDPOINT 34 56 29 55 33 61 / 0 0 0 0 0 0  
KELLOGG 35 53 31 58 33 60 / 10 0 0 0 0 0  
MOSES LAKE 35 65 33 67 36 74 / 0 0 0 0 0 0  
WENATCHEE 40 63 37 66 41 71 / 0 0 0 0 0 0  
OMAK 35 63 34 66 37 69 / 0 0 0 0 0 0  
 

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

 
 

 
 
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