632  
AUUS46 KPDT 231133  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
433 AM PDT SUN JUN 23 2024  
 
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***  
 
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO  
 
7:00 AM AFTERNOON  
SURFACE WINDS SW 13-23 MPH. W 21-26 MPH.  
TRANSPORT WINDS SW 13-23 MPH. W 22-27 MPH.  
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.  
DISPERSION CATEGORY GOOD. GOOD.  
OUTLOOK FOR MON JUN 24 FAIR.  
OUTLOOK FOR TUE JUN 25 FAIR.  
 
VENTILATION INDEX (CATEGORY) 323 (FAIR). 920 (GOOD).  
OUTLOOK FOR MON JUN 24 323 (FAIR).  
OUTLOOK FOR TUE JUN 25 265 (POOR).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS W 5-11 MPH. W 14-19 MPH.  
TRANSPORT WINDS W 5-11 MPH. W 16-22 MPH.  
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR MON JUN 24 POOR.  
OUTLOOK FOR TUE JUN 25 FAIR.  
 
VENTILATION INDEX (CATEGORY) 199 (POOR). 913 (GOOD).  
OUTLOOK FOR MON JUN 24 188 (POOR).  
OUTLOOK FOR TUE JUN 25 270 (POOR).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS NW 6-12 MPH. NW 11-14 MPH.  
TRANSPORT WINDS W 5-9 MPH. W 14-16 MPH.  
MIXING HEIGHT 4000 FT MSL. 8000 FT MSL.  
DISPERSION CATEGORY POOR. FAIR.  
OUTLOOK FOR MON JUN 24 FAIR.  
OUTLOOK FOR TUE JUN 25 GOOD.  
 
VENTILATION INDEX (CATEGORY) 136 (POOR). 565 (FAIR).  
OUTLOOK FOR MON JUN 24 286 (POOR).  
OUTLOOK FOR TUE JUN 25 184 (POOR).  
 
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS  
 
7:00 AM AFTERNOON  
SURFACE WINDS SW 9-20 MPH. W 16-23 MPH.  
TRANSPORT WINDS SW 10-22 MPH. W 16-26 MPH.  
MIXING HEIGHT 2000 FT MSL. 5500 FT MSL.  
DISPERSION CATEGORY FAIR. GOOD.  
OUTLOOK FOR MON JUN 24 FAIR.  
OUTLOOK FOR TUE JUN 25 FAIR.  
 
VENTILATION INDEX (CATEGORY) 272 (POOR). 750 (GOOD).  
OUTLOOK FOR MON JUN 24 286 (POOR).  
OUTLOOK FOR TUE JUN 25 234 (POOR).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 1027 (GOOD)  
ELLENSBURG 1050 (GOOD)  
GOLDENDALE 870 (GOOD)  
TRI-CITIES 1050 (GOOD)  
WALLA WALLA 932 (GOOD)  
YAKIMA 753 (GOOD)  
BEND 709 (GOOD)  
PRINEVILLE 535 (FAIR)  
ENTERPRISE 599 (FAIR)  
HERMISTON 928 (GOOD)  
JOHN DAY 1050 (GOOD)  
LA GRANDE 675 (GOOD)  
MADRAS 755 (GOOD)  
MEACHAM 396 (FAIR)  
PENDLETON 806 (GOOD)  
REDMOND 510 (FAIR)  
SENECA 1050 (GOOD)  
THE DALLES 1050 (GOOD)  
 
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