150  
AUUS46 KPDT 191107  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
407 AM PDT THU OCT 19 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 9-15 MPH. W 12-18 MPH.  
TRANSPORT WINDS S 10-16 MPH. SW 18-26 MPH.  
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.  
DISPERSION CATEGORY FAIR. GOOD.  
OUTLOOK FOR FRI OCT 20 GOOD.  
 
VENTILATION INDEX (CATEGORY) 33 (POOR). 393 (FAIR).  
OUTLOOK FOR FRI OCT 20 1050 (GOOD).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS SW 15-25 MPH. SW 14-22 MPH.  
TRANSPORT WINDS S 10-18 MPH. SW 22-32 MPH.  
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.  
DISPERSION CATEGORY FAIR. GOOD.  
OUTLOOK FOR FRI OCT 20 GOOD.  
 
VENTILATION INDEX (CATEGORY) 119 (POOR). 785 (GOOD).  
OUTLOOK FOR FRI OCT 20 1050 (GOOD).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS S 7-13 MPH. S 15-25 MPH.  
TRANSPORT WINDS S 10-16 MPH. SW 20-30 MPH.  
MIXING HEIGHT NEAR SURFACE. 9500 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR FRI OCT 20 GOOD.  
 
VENTILATION INDEX (CATEGORY) 84 (POOR). 1049 (GOOD).  
OUTLOOK FOR FRI OCT 20 1050 (GOOD).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 482 (FAIR)  
ELLENSBURG 379 (FAIR)  
GOLDENDALE 231 (POOR)  
TRI-CITIES 376 (FAIR)  
WALLA WALLA 497 (FAIR)  
YAKIMA 691 (GOOD)  
BEND 838 (GOOD)  
PRINEVILLE 866 (GOOD)  
ENTERPRISE 1050 (GOOD)  
HERMISTON 295 (POOR)  
JOHN DAY 1050 (GOOD)  
LA GRANDE 1050 (GOOD)  
MADRAS 564 (FAIR)  
MEACHAM 1009 (GOOD)  
PENDLETON 528 (FAIR)  
REDMOND 933 (GOOD)  
SENECA 1020 (GOOD)  
THE DALLES 141 (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.  

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab OR Page
The Nexlab WA Page Main Text Page