Suppression Forecast
Issued by NWS Portland, OR

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000
FNUS76 KPQR 142247
FWSPQR

SPOT FORECAST FOR 36 PIT FIRE...OR-MHF
NATIONAL WEATHER SERVICE PORTLAND OR
347 PM PDT SUN SEP 14 2014

FORECAST IS BASED ON REQUEST TIME OF 1543 PDT ON SEPTEMBER 14.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT UNTIL 5 AM PDT TUESDAY FOR LOW RELATIVE
HUMIDITY...AN INCREASINGLY UNSTABLE ENVIRONMENT...CRITICALLY DRY
FUELS AND DRY THUNDERSTORMS...

.DISCUSSION...VERY DRY AND UNSTABLE AIR REMAINS IN PLACE...ALONG WITH
MID-LEVEL HAINES 6 CONDITIONS PROMOTING EXTREME GROWTH POTENTIAL FOR
THE 36 PIT FIRE. THERMAL LOW PRESSURE REMAINS SPRAWLED ACROSS THE
WILLAMETTE VALLEY AND CASCADE FOOTHILLS...PROVIDING EXTRA INSTABILITY
AND VENTILATION FOR THE FIRE AREA. VERY POOR HUMIDITY RECOVERY IS
EXPECTED AGAIN TONIGHT. WINDS ARE GENERALLY TERRAIN-DRIVEN AND WILL
CONTINUE TO BE SO THROUGH MONDAY. THEN A DISTURBANCE WILL MOVE NORTH
NEAR THE OREGON COAST...BRINGING THE POTENTIAL FOR DRY THUNDERSTORMS
AND GUSTY WINDS MONDAY NIGHT. EVENTUALLY A PUSH OF MARINE AIR FROM
THE SOUTHWEST WILL BRING COOLER TEMPERATURES AND HIGHER RELATIVE
HUMIDITY FOR TUESDAY...WITH SOME DEGREE OF ONSHORE FLOW LIKELY TO
CONTINUE FOR THE REST OF THE WEEK. A MORE ORGANIZED SYSTEM MAY BRING
EVEN COOLER AND MORE SHOWERY WEATHER LATER THIS WEEK...BUT THE JURY
IS STILL OUT ON WHETHER OR NOT THIS SYSTEM WILL PRODUCE WETTING
RAINS.


.REST OF THIS AFTERNOON...

SKY/WEATHER.........MOSTLY SUNNY...ASIDE FROM THE SMOKE.
CWR (%).............0 PERCENT.
MAX TEMPERATURE.....82-87.
MIN HUMIDITY........15-20 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY OR NORTHWEST 2 TO 5 MPH.
VISIBILITY..........UNRESTRICTED OUTSIDE OF SMOKE.
HAINES INDEX........6 (HIGH).

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR...ASIDE FROM THE SMOKE.
CWR (%).............0 PERCENT.
MIN TEMPERATURE.....55-60...EXCEPT 40S IN THE CLACKAMAS
                     RIVER CANYON.
MAX HUMIDITY........30-40 PERCENT...EXCEPT 60-80 PERCENT
                     CANYON BOTTOM.
WIND (20 FT)........DRAINAGE LESS THAN 5 MPH.
VISIBILITY..........UNRESTRICTED OUTSIDE OF SMOKE. AS
                     LOW AS 1/4 MILE OR LESS IN DENSE
                     SMOKE INSIDE THE CLACKAMAS RIVER
                     CANYON.
HAINES INDEX........6 (HIGH).

.MONDAY...

SKY/WEATHER.........MOSTLY SUNNY....ASIDE FROM THE SMOKE.
CWR (%).............0 PERCENT.
MAX TEMPERATURE.....85-90.
MIN HUMIDITY........14-19 PERCENT.
WIND (20 FT)........EAST 1 TO 4 MPH...BECOMING UPSLOPE/
                     UPCANYON 4 TO 8 MPH WITH GUSTS TO
                     15 MPH IN THE AFTERNOON.
VISIBILITY..........UNRESTRICTED OUTSIDE OF SMOKE. AS
                     LOW AS 1/4 MILE OR LESS IN DENSE
                     SMOKE INSIDE THE CLACKAMAS RIVER
                     CANYON IN THE MORNING.
HAINES INDEX........6 (HIGH).

.MONDAY NIGHT...

SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF
                    THUNDERSTORMS.
CWR (%).............2 PERCENT.
MIN TEMPERATURE.....54-59.
MAX HUMIDITY........50-70 PERCENT.
WIND (20 FT)........WEST TO SOUTHWEST 4 TO 8 MPH.
                     GUSTS 15-20 MPH. WINDS DECREASING
                     OVERNIGHT.
VISIBILITY..........UNRESTRICTED OUTSIDE OF SMOKE. AS
                     LOW AS 1/4 MILE OR LESS IN DENSE
                     SMOKE INSIDE THE CLACKAMAS RIVER
                     CANYON.
HAINES INDEX........6 (HIGH).

.TUESDAY...

SKY/WEATHER.........PARTLY CLOUDY.
CWR (%).............0 PERCENT.
MAX TEMPERATURE.....79-84.
MIN HUMIDITY........39-44 PERCENT.
WIND (20 FT)........UPSLOPE 1 TO 4 MPH BECOMING WEST 5 TO 7 MPH IN
                    THE AFTERNOON.
VISIBILITY..........GENERALLY UNRESTRICTED.
HAINES INDEX........5 (MODERATE).


.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...
INCREASING CLOUDS WITH A CHANCE OF SHOWERS DEVELOPING. LOWS 54 TO
59. HIGHS 79 TO 84. AFTERNOON WEST WINDS 3 TO 6 MPH. MINIMUM
HUMIDITY 39-44 PCT.
.THURSDAY...
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS 53 TO 58. HIGHS
72 TO 77. WEST WINDS 2 TO 5 MPH. MINIMUM HUMIDITY 42-55 PCT.
.FRIDAY...
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 54 TO 59. HIGHS
71 TO 76. NORTHWEST WINDS 3 TO 6 MPH. MINIMUM HUMIDITY 50-55 PCT.

$$
FORECASTER...WEAGLE
REQUESTED BY...ARIK
REASON FOR REQUEST...WILDFIRE
.TAG 20140914.36PIT.02/PQR



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