AIR QUALITY WEATHER SUMMARY
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
951 AM EDT MON AUG 31 2009
 
***The following information provided is general weather forecast
information as it relates to expected areas of degraded air
quality, but is not intended to supersede site-specific forecasts
or local alerts and advisories. This especially applies to the
proximity of wildfires where localized weather conditions are
often extreme and very erratic.***

***THIS WILL BE THE FINAL AIR QUALITY WEATHER SUMMARY ISSUED FOR
THE 2009 SEASON***

...NORTHEAST...

COOL HIGH PRESSURE WILL ADVANCE EASTWARD OUT OF THE GREAT LAKES
AND OVER ALL OF NEW ENGLAND ON TUESDAY PROVIDING PARTLY TO MOSTLY
SUNNY SKIES AND DRY WEATHER FOR MOST OF THE REGION. ONE POSSIBLE
EXCEPTION WILL BE NORTHERN MAINE WHERE ITS PROXIMITY TO A MID
LEVEL TROF WILL ALLOW FOR AN INCREASE IN CLOUDS DURING THE
AFTERNOON ALONG WITH AN ISOLATED SHOWER. HIGH TEMPERATURES WILL BE
BELOW NORMAL...RANGING FROM ONLY THE LOW TO MID 60S ACROSS
NORTHERN MAINE AND THE HIGHER ELEVATIONS OF THE APPALACHIANS...TO
THE LOW TO MID 70S ACROSS CENTRAL AND SOUTHERN NEW ENGLAND. WINDS
WILL BE NORTH TO NORTHWEST AT 5 TO 10 MPH...EXCEPT ALONG THE COAST
FROM CAPE COD SOUTHWARD WHERE WINDS BECOME NORTHEAST AND INCREASE
TO 10 TO 20 MPH. VENTILATION INDICES ARE EXPECTED TO BE
GOOD...EXCEPT ALONG THE COAST OF MAINE WHERE THEY WILL BE FAIR TO
MARGINAL.

...CENTRAL AND EASTERN TEXAS...

A WEAK RIDGE OF HIGH PRESSURE WILL BE FOCUSED OVER MOST OF THE
REGION ON TUESDAY AND SHOULD YIELD PARTLY TO MOSTLY SUNNY SKIES
AND HOT TEMPERATURES. THERE WILL BE THE REMNANTS OF A FRONT
SITUATED ACROSS FAR SOUTH TEXAS WHICH WILL HELP FOCUS A THREAT OF
SHOWERS AND THUNDERSTORMS FOR THIS REGION...BUT OTHERWISE THE
REMAINDER OF CENTRAL AND EASTERN TEXAS SHOULD BE DRY. HIGH
TEMPERATURES SHOULD BE IN THE LOW TO MID 90S WITH WINDS GENERALLY
EAST TO NORTHEAST AT 10 MPH. WINDS WILL BE EAST TO SOUTHEAST AT 10
TO 15 MPH HOWEVER OVER SOUTH TEXAS. VENTILATION INDICES ARE
EXPECTED TO BE GOOD.

...SAN JOAQUIN VALLEY/LOS ANGELES BASIN/DESERT SOUTHWEST...

A RIDGE OF HIGH PRESSURE ALOFT IS EXPECTED TO STRENGTHEN FURTHER
ON TUESDAY WHICH WILL CONTINUE TO HELP FOCUS VERY HOT TEMPERATURES
FOR MOST OF THE REGION AND ESPECIALLY THE INTERIOR VALLEYS AND
DESERTS. THE ONLY EXCEPTION WILL BE ALONG THE IMMEDIATE PACIFIC
COAST WITH THE PRESENCE OF A WEAK MARINE LAYER AND ASSOCIATED
ONSHORE FETCH. SKIES ARE FORECAST TO BE PARTLY TO MOSTLY SUNNY
ALONG WITH DRY WEATHER FOR MOST THE REGION...WITH THE EXCEPTION
BEING FAR SOUTHERN CALIFORNIA AND THE DESERT SOUTHWEST WHERE
SUFFICIENT MONSOONAL MOISTURE WILL HAVE RETURNED TO GENERATE SOME
SCATTERED SHOWERS AND THUNDERSTORMS. CONDITIONS LOCALLY ACROSS
SOUTHERN CALIFORNIA THOUGH WILL CONTINUE TO BE INFLUENCED BY
ONGOING WILDFIRE ACTIVITY INCLUDING AREAS OF DENSE SMOKE. HIGH
TEMPERATURES SHOULD BE IN THE LOW TO MID 90S ACROSS THE SAN
JOAQUIN VALLEY...WITH HOTTER TEMPERATURES RANGING FROM 100 TO 110
ACROSS THE INTERIOR VALLEYS AND DESERTS OF SOUTHERN CALIFORNIA AND
SOUTHWEST ARIZONA. THE COOLEST TEMPERATURES SHOULD AGAIN BE ALONG
THE IMMEDIATE PACIFIC COAST WITH HIGHS IN THE UPPER 70S TO LOW
80S. WINDS WILL BE VARIABLE AT 5 TO 10 MPH...EXCEPT ALONG THE
PACIFIC COAST WHERE THEY WILL BE WEST TO NORTHWEST AT 5 TO 10 MPH.
VENTILATION INDICES ARE FORECAST TO BE GOOD...EXCEPT FAIR ALONG
THE PACIFIC COAST.

ORRISON