379  
AUUS46 KPDT 181215  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
415 AM PST FRI JAN 18 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 10-18 MPH. S 4-8 MPH.  
TRANSPORT WINDS SW 14-20 MPH. SW 14-18 MPH.  
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.  
DISPERSION CATEGORY FAIR. FAIR.  
OUTLOOK FOR SAT JAN 19 GOOD.  
 
VENTILATION INDEX (CATEGORY) 35 (POOR). 180 (POOR).  
OUTLOOK FOR SAT JAN 19 251 (POOR).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS SW 3-5 MPH. SE 4-5 MPH.  
TRANSPORT WINDS SW 5-10 MPH. SW 5-9 MPH.  
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR SAT JAN 19 POOR.  
 
VENTILATION INDEX (CATEGORY) 26 (POOR). 54 (POOR).  
OUTLOOK FOR SAT JAN 19 47 (POOR).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS S 5-6 MPH. S 9-19 MPH.  
TRANSPORT WINDS SW 7-11 MPH. S 10-14 MPH.  
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR SAT JAN 19 POOR.  
 
VENTILATION INDEX (CATEGORY) 26 (POOR). 118 (POOR).  
OUTLOOK FOR SAT JAN 19 50 (POOR).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 25 (POOR)  
ELLENSBURG 25 (POOR)  
GOLDENDALE 33 (POOR)  
TRI-CITIES 107 (POOR)  
WALLA WALLA 257 (POOR)  
YAKIMA 30 (POOR)  
BEND 221 (POOR)  
PRINEVILLE 195 (POOR)  
ENTERPRISE 47 (POOR)  
HERMISTON 77 (POOR)  
JOHN DAY 122 (POOR)  
LA GRANDE 119 (POOR)  
MADRAS 129 (POOR)  
MEACHAM 158 (POOR)  
PENDLETON 232 (POOR)  
REDMOND 216 (POOR)  
SENECA 145 (POOR)  
THE DALLES 25 (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/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.  

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab OR Page
The Nexlab WA Page Main Text Page