835  
AUUS46 KPDT 261106  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
406 AM PDT SUN MAR 26 2017  
 
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***  
 
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO  
 
7:00 AM AFTERNOON  
SURFACE WINDS SE 3-6 MPH. SW 4-8 MPH.  
TRANSPORT WINDS SE 3-6 MPH. SW 9-16 MPH.  
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR MON MAR 27 GOOD.  
 
VENTILATION INDEX (CATEGORY) 25 (POOR). 283 (POOR).  
OUTLOOK FOR MON MAR 27 962 (GOOD).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS W 3-7 MPH. SE 4-8 MPH.  
TRANSPORT WINDS W 3-7 MPH. SE 4-10 MPH.  
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR MON MAR 27 GOOD.  
 
VENTILATION INDEX (CATEGORY) 25 (POOR). 63 (POOR).  
OUTLOOK FOR MON MAR 27 677 (GOOD).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS S 4-11 MPH. S 15-22 MPH.  
TRANSPORT WINDS S 4-11 MPH. S 19-23 MPH.  
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR MON MAR 27 GOOD.  
 
VENTILATION INDEX (CATEGORY) 28 (POOR). 708 (GOOD).  
OUTLOOK FOR MON MAR 27 701 (GOOD).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 74 (POOR)  
ELLENSBURG 69 (POOR)  
GOLDENDALE 104 (POOR)  
TRI-CITIES 110 (POOR)  
WALLA WALLA 613 (GOOD)  
YAKIMA 66 (POOR)  
BEND 494 (FAIR)  
PRINEVILLE 489 (FAIR)  
ENTERPRISE 898 (GOOD)  
HERMISTON 81 (POOR)  
JOHN DAY 502 (FAIR)  
LA GRANDE 712 (GOOD)  
MADRAS 431 (FAIR)  
MEACHAM 516 (FAIR)  
PENDLETON 462 (FAIR)  
REDMOND 533 (FAIR)  
SENECA 357 (FAIR)  
THE DALLES 119 (POOR)  
 
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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