FNUS76 KPQR 051553
FWSPQR

SPOT FORECAST FOR OPAL LAKE...USFS WNF
NATIONAL WEATHER SERVICE PORTLAND OR
853 AM PDT MON AUG 5 2013

FORECAST IS BASED ON REQUEST TIME OF 0831 PDT ON AUGUST 05.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...VERY WARM...DRY...AND UNSTABLE THE NEXT FEW DAYS...
...SUBSIDENCE INVERSION LIKELY TO DEVELOP TONIGHT...

.DISCUSSION...AN UPPER LEVEL RIDGE OF HIGH PRESSURE OVER THE GREAT
BASIN WILL STRENGTHEN AND BUILD NORTHWEST INTO OREGON TODAY AND
TUESDAY. MEANWHILE A SURFACE THERMAL TROUGH WILL LINGER OVER THE
CASCADES AND WILLAMETTE VALLEY...PROVIDING DECENT LOW TO MID-LEVEL
INSTABILITY AND VENTILATION THROUGH TUESDAY. EXPECT HAINES 5 TO 6
CONDITIONS OVER THE FIRE AREA THROUGH TUESDAY...MAINLY FOR THE
INSTABILITY. THE STRENGTHENING UPPER LEVEL RIDGE ALSO INCREASES
THE POTENTIAL FOR A SUBSIDENCE INVERSION TONIGHT...WHICH COULD
RESULT IN VERY POOR OR NO HUMIDITY RECOVERY ABOVE THE SHALLOW
VALLEY/LAKE INVERSIONS TONIGHT. THERE WILL BE AN INCREASING CHANCE
OF THUNDERSTORMS LATER THIS WEEK AS AN UPPER LEVEL LOW OFF
NORTHERN CALIFORNIA BEGINS TO PULL MONSOON MOISTURE INTO OREGON.


.TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR (%).............0 PERCENT.
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........12-15 PERCENT.
WIND (20 FT)........UPSLOPE INCREASING 3 TO 7 MPH THIS MORNING...
                     BECOMING NORTHWEST OR UP-CANYON 4 TO 8 MPH
                     WITH GUSTS TO 15 MPH THIS AFTERNOON.

TIME (PDT)      8 AM   10 AM  NOON     2 PM   4 PM
TEMP............56     69     79       80     79
RH..............55     30     22       15     15
20 FT WIND......UP 1   UP 3   UP/NW 4  NW 6   NW 6
   MAX GUST.....       5      10       15     15


.TONIGHT...

SKY/WEATHER.........MAINLY CLEAR...EXCEPT FOR SMOKE SETTLING IN
                     THE VALLEYS.
CWR (%).............0 PERCENT.
MIN TEMPERATURE.....AROUND 55 IN THE THERMAL BELT...BUT AS LOW
                     AS 42-45 ALONG OPAL LAKE.
MAX HUMIDITY........25-35 PERCENT IN THE THERMAL BELT...AS HIGH
x09x09     AS 80 PERCENT ALONG OPAL LAKE.
WIND (20 FT)........NORTHWEST 3 TO 6 MPH WITH GUSTS TO 12 MPH
                     EARLY EVENING...BECOMING DRAINAGE 0 TO 3 MPH
                     BY 2100.


.TUESDAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR (%).............NEAR ZERO.
MAX TEMPERATURE.....81-84.
MIN HUMIDITY........12-15 PERCENT.
WIND (20 FT)........UPSLOPE INCREASING 3 TO 7 MPH IN THE MORNING...
                     BECOMING NORTHWEST OR UP-CANYON 4 TO 8 MPH
                     WITH GUSTS TO 15 MPH IN THE AFTERNOON.


$$
FORECASTER...WEAGLE
REQUESTED BY...LOVATO
REASON FOR REQUEST...WILDFIRE
.TAG 20130805.OPALL.01/PQR