137  
AUUS46 KPDT 241224  
DDOPDT  
 
DAILY DISPERSION OUTLOOK  
NATIONAL WEATHER SERVICE PENDLETON OR  
424 AM PST SAT FEB 24 2024  
 
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***  
 
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO  
 
7:00 AM AFTERNOON  
SURFACE WINDS S 5-13 MPH. SW 15-25 MPH.  
TRANSPORT WINDS SW 7-14 MPH. W 15-24 MPH.  
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR SUN FEB 25 GOOD.  
OUTLOOK FOR MON FEB 26 GOOD.  
 
VENTILATION INDEX (CATEGORY) 41 (POOR). 413 (FAIR).  
OUTLOOK FOR SUN FEB 25 803 (GOOD).  
OUTLOOK FOR MON FEB 26 1005 (GOOD).  
 
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...  
SELAH...AND NACHES AREA  
 
7:00 AM AFTERNOON  
SURFACE WINDS NW 2-5 MPH. W 6-12 MPH.  
TRANSPORT WINDS W 3-7 MPH. W 7-13 MPH.  
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.  
DISPERSION CATEGORY POOR. POOR.  
OUTLOOK FOR SUN FEB 25 GOOD.  
OUTLOOK FOR MON FEB 26 GOOD.  
 
VENTILATION INDEX (CATEGORY) 25 (POOR). 117 (POOR).  
OUTLOOK FOR SUN FEB 25 513 (FAIR).  
OUTLOOK FOR MON FEB 26 918 (GOOD).  
 
FOR THE GRANDE RONDE RIVER VALLEY  
 
7:00 AM AFTERNOON  
SURFACE WINDS S 5-9 MPH. SW 8-13 MPH.  
TRANSPORT WINDS S 8-11 MPH. W 10-19 MPH.  
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.  
DISPERSION CATEGORY POOR. GOOD.  
OUTLOOK FOR SUN FEB 25 GOOD.  
OUTLOOK FOR MON FEB 26 GOOD.  
 
VENTILATION INDEX (CATEGORY) 39 (POOR). 482 (FAIR).  
OUTLOOK FOR SUN FEB 25 457 (FAIR).  
OUTLOOK FOR MON FEB 26 982 (GOOD).  
 
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS  
 
7:00 AM AFTERNOON  
SURFACE WINDS S 6-14 MPH. SW 15-22 MPH.  
TRANSPORT WINDS SW 10-17 MPH. SW 19-24 MPH.  
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.  
DISPERSION CATEGORY FAIR. GOOD.  
OUTLOOK FOR SUN FEB 25 GOOD.  
OUTLOOK FOR MON FEB 26 GOOD.  
 
VENTILATION INDEX (CATEGORY) 56 (POOR). 509 (FAIR).  
OUTLOOK FOR SUN FEB 25 842 (GOOD).  
OUTLOOK FOR MON FEB 26 920 (GOOD).  
 
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES  
CLE ELUM 315 (FAIR)  
ELLENSBURG 358 (FAIR)  
GOLDENDALE 314 (FAIR)  
TRI-CITIES 209 (POOR)  
WALLA WALLA 436 (FAIR)  
YAKIMA 124 (POOR)  
BEND 90 (POOR)  
PRINEVILLE 215 (POOR)  
ENTERPRISE 230 (POOR)  
HERMISTON 422 (FAIR)  
JOHN DAY 329 (FAIR)  
LA GRANDE 534 (FAIR)  
MADRAS 81 (POOR)  
MEACHAM 496 (FAIR)  
PENDLETON 564 (FAIR)  
REDMOND 118 (POOR)  
SENECA 420 (FAIR)  
THE DALLES 332 (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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