752  
AUUS46 KPDT 280926  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
226 AM PDT WED JUN 28 2017  
 
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***  
 
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO  
 
7:00 AM AFTERNOON  
SURFACE WINDS S-SW 5-10 MPH. SW 10-15 MPH.  
TRANSPORT WINDS S-SW 5-10 MPH. NW 10-15 MPH.  
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR THU JUN 29 POOR.  
 
VENTILATION INDEX (CATEGORY) 123 (POOR). 867 (GOOD).  
OUTLOOK FOR THU JUN 29 332 (FAIR).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS NW 7-13 MPH. NW 10-15 MPH.  
TRANSPORT WINDS NW 7-13 MPH. NW 10-15 MPH.  
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR THU JUN 29 POOR.  
 
VENTILATION INDEX (CATEGORY) 60 (POOR). 811 (GOOD).  
OUTLOOK FOR THU JUN 29 289 (POOR).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS NW 3-7 MPH. W 5-10 MPH.  
TRANSPORT WINDS NW 3-7 MPH. NW 10-15 MPH.  
MIXING HEIGHT NEAR SURFACE. 9500 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR THU JUN 29 FAIR.  
 
VENTILATION INDEX (CATEGORY) 47 (POOR). 578 (FAIR).  
OUTLOOK FOR THU JUN 29 121 (POOR).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 442 (FAIR)  
ELLENSBURG 873 (GOOD)  
GOLDENDALE 477 (FAIR)  
TRI-CITIES 904 (GOOD)  
WALLA WALLA 918 (GOOD)  
YAKIMA 1050 (GOOD)  
BEND 806 (GOOD)  
PRINEVILLE 760 (GOOD)  
ENTERPRISE 632 (GOOD)  
HERMISTON 805 (GOOD)  
JOHN DAY 840 (GOOD)  
LA GRANDE 601 (GOOD)  
MADRAS 712 (GOOD)  
MEACHAM 547 (FAIR)  
PENDLETON 827 (GOOD)  
REDMOND 845 (GOOD)  
SENECA 873 (GOOD)  
THE DALLES 633 (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/FORECAST/FWXGRAPHICALVENTILATION.PHP?WFO=PDT  
 
IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE  
NATIONAL WEATHER SERVICE IN PENDLETON.  
 

 
 
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