636  
AUUS46 KPDT 221016  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
315 AM PDT FRI JUN 22 2018  
 
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***  
 
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO  
 
7:00 AM AFTERNOON  
SURFACE WINDS SW-NW 6-12 MPH. SW-W 15-25 MPH.  
TRANSPORT WINDS SW-NW 6-12 MPH. SW 15-25 MPH.  
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR SAT JUN 23 FAIR.  
 
VENTILATION INDEX (CATEGORY) 208 (POOR). 1006 (GOOD).  
OUTLOOK FOR SAT JUN 23 475 (FAIR).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS SW 6-12 MPH. W 15-25 MPH.  
TRANSPORT WINDS SW 6-12 MPH. NW 15-25 MPH.  
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR SAT JUN 23 POOR.  
 
VENTILATION INDEX (CATEGORY) 73 (POOR). 582 (FAIR).  
OUTLOOK FOR SAT JUN 23 373 (FAIR).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS SW 0-4 MPH. NW 8-15 MPH.  
TRANSPORT WINDS SW 0-4 MPH. W 15-25 MPH.  
MIXING HEIGHT NEAR SURFACE. 9500 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR SAT JUN 23 GOOD.  
 
VENTILATION INDEX (CATEGORY) 66 (POOR). 605 (GOOD).  
OUTLOOK FOR SAT JUN 23 368 (FAIR).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 333 (FAIR)  
ELLENSBURG 662 (GOOD)  
GOLDENDALE 457 (FAIR)  
TRI-CITIES 769 (GOOD)  
WALLA WALLA 1050 (GOOD)  
YAKIMA 595 (FAIR)  
BEND 585 (FAIR)  
PRINEVILLE 504 (FAIR)  
ENTERPRISE 693 (GOOD)  
HERMISTON 1050 (GOOD)  
JOHN DAY 477 (FAIR)  
LA GRANDE 642 (GOOD)  
MADRAS 519 (FAIR)  
MEACHAM 677 (GOOD)  
PENDLETON 1050 (GOOD)  
REDMOND 571 (FAIR)  
SENECA 520 (FAIR)  
THE DALLES 651 (GOOD)  
 
METEOROLOGICAL INFORMATION PROVIDED IN THIS PRODUCT REPRESENTS ONLY  
SOME OF THE FACTORS USED IN BURN DECISIONS. BURN DECISIONS ARE  
OUTSIDE THE PURVIEW OF THE NATIONAL WEATHER SERVICE.  
 
THE VENTILATION INDEX IS A TOOL TO ASSIST SMOKE MANAGEMENT  
AGENCIES IN DETERMINING BURN OR NO BURN DECISIONS. A VENTILATION  
INDEX GRAPHIC IS ON THE PENDLETON WEBSITE AT THE FOLLOWING ADDRESS:  
HTTP://WWW.WRH.NOAA.GOV/PDT/GFORECAST/GINDEX.PHP?FCST=MIXHGT,VENTCAT,TRANSWIND,VENTINDX&VT=0,72  
 
IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE  
NATIONAL WEATHER SERVICE IN PENDLETON.  
 

 
 
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