814  
AUUS46 KPDT 291132  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
432 AM PDT MON MAY 29 2017  
 
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***  
 
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO  
 
7:00 AM AFTERNOON  
SURFACE WINDS E 3-6 MPH. NE 4-7 MPH.  
TRANSPORT WINDS SE 4-8 MPH. N 4-8 MPH.  
MIXING HEIGHT NEAR SURFACE. 9500 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR TUE MAY 30 FAIR.  
 
VENTILATION INDEX (CATEGORY) 25 (POOR). 204 (POOR).  
OUTLOOK FOR TUE MAY 30 398 (FAIR).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS NW 4-8 MPH. E 4-7 MPH.  
TRANSPORT WINDS N 5-10 MPH. NE 4-8 MPH.  
MIXING HEIGHT NEAR SURFACE. 9500 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR TUE MAY 30 GOOD.  
 
VENTILATION INDEX (CATEGORY) 25 (POOR). 283 (POOR).  
OUTLOOK FOR TUE MAY 30 486 (FAIR).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS SE 3-6 MPH. S 4-7 MPH.  
TRANSPORT WINDS SE 3-6 MPH. S 4-8 MPH.  
MIXING HEIGHT NEAR SURFACE. 12000 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR TUE MAY 30 GOOD.  
 
VENTILATION INDEX (CATEGORY) 25 (POOR). 426 (FAIR).  
OUTLOOK FOR TUE MAY 30 1034 (GOOD).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 451 (FAIR)  
ELLENSBURG 364 (FAIR)  
GOLDENDALE 483 (FAIR)  
TRI-CITIES 222 (POOR)  
WALLA WALLA 35 (POOR)  
YAKIMA 260 (POOR)  
BEND 1050 (GOOD)  
PRINEVILLE 1050 (GOOD)  
ENTERPRISE 419 (FAIR)  
HERMISTON 287 (POOR)  
JOHN DAY 492 (FAIR)  
LA GRANDE 434 (FAIR)  
MADRAS 432 (FAIR)  
MEACHAM 307 (FAIR)  
PENDLETON 225 (POOR)  
REDMOND 1038 (GOOD)  
SENECA 483 (FAIR)  
THE DALLES 303 (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/FORECAST/FWXGRAPHICALVENTILATION.PHP?WFO=PDT  
 
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