272  
AUUS46 KPDT 171114  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
414 AM PDT WED AUG 17 2022  
 
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***  
 
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO  
 
7:00 AM AFTERNOON  
SURFACE WINDS SE 3-7 MPH. N 8-10 MPH.  
TRANSPORT WINDS SW 1-3 MPH. NE 6-10 MPH.  
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.  
DISPERSION CATEGORY POOR. FAIR.  
OUTLOOK FOR THU AUG 18 FAIR.  
 
VENTILATION INDEX (CATEGORY) 26 (POOR). 277 (POOR).  
OUTLOOK FOR THU AUG 18 290 (POOR).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS W 5-9 MPH. E 5-9 MPH.  
TRANSPORT WINDS NW 3-7 MPH. E 4-8 MPH.  
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR THU AUG 18 POOR.  
 
VENTILATION INDEX (CATEGORY) 29 (POOR). 268 (POOR).  
OUTLOOK FOR THU AUG 18 470 (FAIR).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS N 4-5 MPH. N 6-6 MPH.  
TRANSPORT WINDS NW 1-3 MPH. W 5-6 MPH.  
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR THU AUG 18 GOOD.  
 
VENTILATION INDEX (CATEGORY) 25 (POOR). 388 (FAIR).  
OUTLOOK FOR THU AUG 18 411 (FAIR).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 483 (FAIR)  
ELLENSBURG 405 (FAIR)  
GOLDENDALE 597 (FAIR)  
TRI-CITIES 284 (POOR)  
WALLA WALLA 194 (POOR)  
YAKIMA 248 (POOR)  
BEND 284 (POOR)  
PRINEVILLE 308 (FAIR)  
ENTERPRISE 544 (FAIR)  
HERMISTON 330 (FAIR)  
JOHN DAY 276 (POOR)  
LA GRANDE 310 (FAIR)  
MADRAS 265 (POOR)  
MEACHAM 164 (POOR)  
PENDLETON 258 (POOR)  
REDMOND 293 (POOR)  
SENECA 602 (GOOD)  
THE DALLES 560 (FAIR)  
 
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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