287  
AUUS46 KPDT 160951  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
251 AM PDT TUE JUL 16 2019  
 
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***  
 
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO  
 
7:00 AM AFTERNOON  
SURFACE WINDS SW 3-7 MPH. SW-W 7-13 MPH.  
TRANSPORT WINDS SW 3-7 MPH. SW 16-24 MPH.  
MIXING HEIGHT NEAR SURFACE. 9500 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR WED JUL 17 GOOD.  
 
VENTILATION INDEX (CATEGORY) 109 (POOR). 685 (GOOD).  
OUTLOOK FOR WED JUL 17 1008 (GOOD).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS NW 3-7 MPH. W 5-10 MPH.  
TRANSPORT WINDS NW 3-7 MPH. W 8-15 MPH.  
MIXING HEIGHT NEAR SURFACE. 9500 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR WED JUL 17 GOOD.  
 
VENTILATION INDEX (CATEGORY) 67 (POOR). 398 (FAIR).  
OUTLOOK FOR WED JUL 17 751 (GOOD).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS NW 4-9 MPH. NW 5-10 MPH.  
TRANSPORT WINDS NW 4-9 MPH. SW 16-24 MPH.  
MIXING HEIGHT NEAR SURFACE. 10500 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR WED JUL 17 GOOD.  
 
VENTILATION INDEX (CATEGORY) 35 (POOR). 375 (FAIR).  
OUTLOOK FOR WED JUL 17 524 (FAIR).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 439 (FAIR)  
ELLENSBURG 507 (FAIR)  
GOLDENDALE 606 (GOOD)  
TRI-CITIES 593 (FAIR)  
WALLA WALLA 649 (GOOD)  
YAKIMA 391 (FAIR)  
BEND 243 (POOR)  
PRINEVILLE 301 (FAIR)  
ENTERPRISE 315 (FAIR)  
HERMISTON 762 (GOOD)  
JOHN DAY 305 (FAIR)  
LA GRANDE 381 (FAIR)  
MADRAS 332 (FAIR)  
MEACHAM 431 (FAIR)  
PENDLETON 694 (GOOD)  
REDMOND 301 (FAIR)  
SENECA 342 (FAIR)  
THE DALLES 759 (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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