953  
AUUS46 KPDT 151141  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
441 AM PDT SUN JUL 15 2018  
 
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***  
 
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO  
 
7:00 AM AFTERNOON  
SURFACE WINDS VRB 2-5 MPH. N 5-10 MPH.  
TRANSPORT WINDS VRB 3-6 MPH. NE 6-12 MPH.  
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.  
DISPERSION CATEGORY POOR. FAIR.  
OUTLOOK FOR MON JUL 16 GOOD.  
 
VENTILATION INDEX (CATEGORY) 47 (POOR). 350 (FAIR).  
OUTLOOK FOR MON JUL 16 330 (FAIR).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS W 4-8 MPH. SE 3-7 MPH.  
TRANSPORT WINDS W 4-8 MPH. NE 4-9 MPH.  
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.  
DISPERSION CATEGORY POOR. FAIR.  
OUTLOOK FOR MON JUL 16 GOOD.  
 
VENTILATION INDEX (CATEGORY) 82 (POOR). 342 (FAIR).  
OUTLOOK FOR MON JUL 16 409 (FAIR).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS VRB 2-5 MPH. N 5-10 MPH.  
TRANSPORT WINDS VRB 3-6 MPH. N 6-11 MPH.  
MIXING HEIGHT NEAR SURFACE. 11000 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR MON JUL 16 GOOD.  
 
VENTILATION INDEX (CATEGORY) 30 (POOR). 385 (FAIR).  
OUTLOOK FOR MON JUL 16 428 (FAIR).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 168 (POOR)  
ELLENSBURG 187 (POOR)  
GOLDENDALE 354 (FAIR)  
TRI-CITIES 407 (FAIR)  
WALLA WALLA 275 (POOR)  
YAKIMA 220 (POOR)  
BEND 200 (POOR)  
PRINEVILLE 312 (FAIR)  
ENTERPRISE 267 (POOR)  
HERMISTON 449 (FAIR)  
JOHN DAY 496 (FAIR)  
LA GRANDE 401 (FAIR)  
MADRAS 241 (POOR)  
MEACHAM 263 (POOR)  
PENDLETON 354 (FAIR)  
REDMOND 302 (FAIR)  
SENECA 478 (FAIR)  
THE DALLES 510 (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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