283  
FXUS66 KOTX 190536  
AFDOTX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE SPOKANE WA  
1036 PM PDT MON MAR 18 2019  
   
SYNOPSIS
 
 
DRY AND MILD CONDITIONS ARE EXPECTED THROUGH AT LEAST THURSDAY  
WITH CLEAR SKIES. WEDNESDAY SHOULD BE THE WARMEST DAY WITH HIGHS  
IN THE UPPER 50S TO MID 60S WITH SUBTLE COOLING ON THURSDAY. HIGH  
PRESSURE WILL BREAK DOWN LATE FRIDAY WITH A CHANCE OF PRECIPITATION  
SATURDAY AND SUNDAY.  
 

 
   
DISCUSSION
 
 
TONIGHT AND TOMORROW: NO MAJOR IMPACTS ARE EXPECTED FOR THIS PERIOD.  
THE CONTINUING HIGH PRESSURE AND WARM WEATHER IS EXPECTED FOR THIS  
PERIOD. AS MORE SNOW MELTS, RISES ON STREAMS AND CREEKS WILL STILL  
PRODUCE MINIMAL IMPACTS IF ANY. OVERNIGHT TEMPERATURES WILL BE IN  
THE RANGE OF FREEZING. HIGHS FOR TOMORROW WILL BE IN THE UPPER 50S  
TO LOW 60S BRINGING THE REGION ITS WARMEST DAY OF THE YEAR SO FAR.  
/JDC  
 
TUESDAY NIGHT THROUGH FRIDAY...THE WARM AND DRY CONDITIONS FROM THE  
PAST FEW DAYS WILL CONTINUE INTO FRIDAY AS HIGH PRESSURE  
DOMINATES THE REGION. TEMPERATURES IN THE MID 50S TO AROUND 60  
WILL BE LIKELY THROUGH FRIDAY, WITH THE WARMEST DAY WEDNESDAY  
WHERE TEMPERATURES WILL PUSH INTO THE LOWER 60S. MINIMUM  
TEMPERATURES WILL BE WITHIN A FEW DEGREES EITHER SIDE OF FREEZING.  
WARM TEMPERATURES WILL RESULT IN GOOD MELTING OF THE SNOW PACK  
THE NEXT FEW DAYS WITH MANY AREAS IN THE COLUMBIA BASIN AND THE  
PALOUSE LIKELY SLOWLY LOSING ALL OF THE SNOW. INCREASED RUN-OFF  
WILL RESULT IN SOME RISES ON STREAMS AND SMALL RIVERS, SOME  
LOCALIZED PONDING ALONG ROADS AND POSSIBLY SOME BOGGY FIELDS. AT  
THIS TIME NO FLOODING IS EXPECTED. BY THURSDAY AND FRIDAY THE  
RIDGE WILL GET SLOWLY PUSHED OUT OF THE REGION AS ONE PACIFIC  
STORM SYSTEM MOVES INTO CALIFORNIA AND ANOTHER MOVES INTO THE  
EASTERN PACIFIC. THIS WILL RESULT IN SLIGHTLY COOLER TEMPERATURES  
AND INCREASING CLOUDS BY FRIDAY AFTERNOON, AND POSSIBLY SOME LIGHT  
SNOW NEAR THE CASCADE CREST  
 
LATE FRIDAY THROUGH MONDAY...THE PACIFIC STORM SYSTEM IN THE EAST  
PACIFIC WILL EJECT OFF A SHORT WAVE DISTURBANCE FRIDAY NIGHT AND  
EARLY SATURDAY MORNING, WHILE THE PARENT LOW CONTINUES TO SPIN OUT  
AROUND 150W. THIS WEAKER WAVE WILL TAP INTO DEEPER MOISTURE BUT IT  
DOESN'T APPEAR TO BE PARTICULARLY STRONG. THIS WILL BE A FAIRLY  
MILD WEATHER DISTURBANCE WITH SNOW LEVELS STARTING OUT BETWEEN  
5500-6500 FEET, THEN COOLING OFF TO 3500-4500 BEHIND THE COLD  
FRONT ON SATURDAY. ISENTROPIC LIFT IS NOT STELLAR BY ANY MEANS,  
BUT GUIDANCE IS PICKING UP A MID LEVEL CIRCULATION OVER THE  
OKANOGAN HIGHLANDS SATURDAY MORNING. THIS WILL BE THE AREA THAT  
SHOULD GET THE HEAVIEST PRECIPITATION. OVER ALL IT LOOKS LIKE  
LIGHT PRECIPITATION ACROSS THE LOWLANDS WITH LESS THAN A TENTH OF  
AN INCH POSSIBLE, UP TO A QUARTER INCH FOR THE MOUNTAINS AND CLOSE  
TO A HALF INCH FR THE OKANOGAN HIGHLANDS. WITH THE SNOW LEVELS  
THIS HIGH SNOW ACCUMULATIONS WILL ONLY BE A COUPLE OF INCHES  
ACROSS THE HIGHER TERRAIN. MOUNTAIN SNOW SHOWERS WILL BE KEPT IN  
THE FORECAST FOR SUNDAY AND SUNDAY NIGHT, THEN CONDITIONS WILL DRY  
OUT MONDAY AND MONDAY NIGHT. TEMPERATURES WILL COOL OFF SUNDAY AND  
MONDAY BUT REMAIN ON THE WARM SIDE OF NORMAL. TOBIN  
 

 
   
AVIATION
 
 
06Z TAFS: VFR CONDITIONS WITH CLEAR SKIES AND LIGHT WINDS FOR AT  
LEAST THE NEXT 24 HOURS.  
 

 
   
PRELIMINARY POINT TEMPS/POPS
 
 
SPOKANE 30 58 32 61 32 57 / 0 0 0 0 0 0  
COEUR D'ALENE 30 56 33 60 33 59 / 0 0 0 0 0 0  
PULLMAN 31 56 33 58 31 57 / 0 0 0 0 0 0  
LEWISTON 34 59 36 61 37 59 / 0 0 0 0 0 0  
COLVILLE 28 61 30 64 32 62 / 0 0 0 0 0 0  
SANDPOINT 31 56 34 60 35 59 / 0 0 0 0 0 0  
KELLOGG 31 56 33 60 34 59 / 0 0 0 0 0 0  
MOSES LAKE 30 61 34 64 34 59 / 0 0 0 0 0 0  
WENATCHEE 33 54 34 56 34 59 / 0 0 0 0 0 0  
OMAK 32 57 35 61 35 60 / 0 0 0 0 0 0  
 

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

 
 

 
 
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