437  
AUUS46 KPDT 181145  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
445 AM PDT MON MAR 18 2019  
 
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***  
 
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO  
 
7:00 AM AFTERNOON  
SURFACE WINDS E-SE 1-6 MPH. N 3-7 MPH.  
TRANSPORT WINDS E-SE 1-6 MPH. N 5-9 MPH.  
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR TUE MAR 19 POOR.  
 
VENTILATION INDEX (CATEGORY) 25 (POOR). 73 (POOR).  
OUTLOOK FOR TUE MAR 19 73 (POOR).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS W-NW 3-7 MPH. NE 4-8 MPH.  
TRANSPORT WINDS W-NW 3-7 MPH. NE 9-14 MPH.  
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR TUE MAR 19 POOR.  
 
VENTILATION INDEX (CATEGORY) 25 (POOR). 153 (POOR).  
OUTLOOK FOR TUE MAR 19 91 (POOR).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS W-NW 3-8 MPH. N-NE 5-12 MPH.  
TRANSPORT WINDS W-NW 3-8 MPH. N-NE 4-8 MPH.  
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR TUE MAR 19 FAIR.  
 
VENTILATION INDEX (CATEGORY) 25 (POOR). 65 (POOR).  
OUTLOOK FOR TUE MAR 19 221 (POOR).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 243 (POOR)  
ELLENSBURG 157 (POOR)  
GOLDENDALE 235 (POOR)  
TRI-CITIES 61 (POOR)  
WALLA WALLA 48 (POOR)  
YAKIMA 190 (POOR)  
BEND 160 (POOR)  
PRINEVILLE 155 (POOR)  
ENTERPRISE 110 (POOR)  
HERMISTON 109 (POOR)  
JOHN DAY 295 (POOR)  
LA GRANDE 67 (POOR)  
MADRAS 93 (POOR)  
MEACHAM 144 (POOR)  
PENDLETON 94 (POOR)  
REDMOND 89 (POOR)  
SENECA 406 (FAIR)  
THE DALLES 241 (POOR)  
 
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