257  
AUUS46 KPDT 131211  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
511 AM PDT MON AUG 13 2018  
 
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***  
 
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO  
 
7:00 AM AFTERNOON  
SURFACE WINDS ESE 3-6 MPH. N 6-12 MPH.  
TRANSPORT WINDS SE 4-8 MPH. NE 6-12 MPH.  
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.  
DISPERSION CATEGORY POOR. FAIR.  
OUTLOOK FOR TUE AUG 14 POOR.  
 
VENTILATION INDEX (CATEGORY) 25 (POOR). 609 (GOOD).  
OUTLOOK FOR TUE AUG 14 205 (POOR).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS NW 4-8 MPH. NE 5-10 MPH.  
TRANSPORT WINDS S 4-8 MPH. NE 6-12 MPH.  
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.  
DISPERSION CATEGORY POOR. FAIR.  
OUTLOOK FOR TUE AUG 14 POOR.  
 
VENTILATION INDEX (CATEGORY) 27 (POOR). 662 (GOOD).  
OUTLOOK FOR TUE AUG 14 174 (POOR).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS NW 3-6 MPH. N 6-12 MPH.  
TRANSPORT WINDS SE 4-8 MPH. N 7-14 MPH.  
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR TUE AUG 14 FAIR.  
 
VENTILATION INDEX (CATEGORY) 26 (POOR). 542 (FAIR).  
OUTLOOK FOR TUE AUG 14 306 (FAIR).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 626 (GOOD)  
ELLENSBURG 680 (GOOD)  
GOLDENDALE 772 (GOOD)  
TRI-CITIES 637 (GOOD)  
WALLA WALLA 564 (FAIR)  
YAKIMA 662 (GOOD)  
BEND 405 (FAIR)  
PRINEVILLE 585 (FAIR)  
ENTERPRISE 450 (FAIR)  
HERMISTON 654 (GOOD)  
JOHN DAY 495 (FAIR)  
LA GRANDE 570 (FAIR)  
MADRAS 560 (FAIR)  
MEACHAM 469 (FAIR)  
PENDLETON 551 (FAIR)  
REDMOND 537 (FAIR)  
SENECA 503 (FAIR)  
THE DALLES 710 (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