399  
AUUS46 KPDT 151152  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
452 AM PDT MON AUG 15 2022  
 
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***  
 
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO  
 
7:00 AM AFTERNOON  
SURFACE WINDS S 3-10 MPH. N 5-9 MPH.  
TRANSPORT WINDS SW 5-10 MPH. N 6-10 MPH.  
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR TUE AUG 16 POOR.  
 
VENTILATION INDEX (CATEGORY) 52 (POOR). 140 (POOR).  
OUTLOOK FOR TUE AUG 16 88 (POOR).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS NW 1-7 MPH. SE 5-10 MPH.  
TRANSPORT WINDS W 4-8 MPH. S 6-10 MPH.  
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR TUE AUG 16 POOR.  
 
VENTILATION INDEX (CATEGORY) 35 (POOR). 214 (POOR).  
OUTLOOK FOR TUE AUG 16 84 (POOR).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS N 1-5 MPH. N 6-8 MPH.  
TRANSPORT WINDS NW 4-5 MPH. N 7-9 MPH.  
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR TUE AUG 16 FAIR.  
 
VENTILATION INDEX (CATEGORY) 34 (POOR). 315 (FAIR).  
OUTLOOK FOR TUE AUG 16 247 (POOR).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 301 (FAIR)  
ELLENSBURG 330 (FAIR)  
GOLDENDALE 231 (POOR)  
TRI-CITIES 94 (POOR)  
WALLA WALLA 150 (POOR)  
YAKIMA 260 (POOR)  
BEND 214 (POOR)  
PRINEVILLE 216 (POOR)  
ENTERPRISE 218 (POOR)  
HERMISTON 176 (POOR)  
JOHN DAY 282 (POOR)  
LA GRANDE 294 (POOR)  
MADRAS 263 (POOR)  
MEACHAM 142 (POOR)  
PENDLETON 193 (POOR)  
REDMOND 252 (POOR)  
SENECA 343 (FAIR)  
THE DALLES 258 (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.  

 
 
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