[willamette-fcst] Forecast - Thursday, October 1st, 2009
Willamette Valley Ag/Burning Forecast
willamette-fcst at listsmart.osl.state.or.us
Thu Oct 1 12:11:46 PDT 2009
Daily Smoke Management Forecast
Oregon Department of Agriculture
Smoke Management Program
Weather Outlook and Field Burning Advisory for Willamette Valley Growers and Fire Districts.
...Next Update Scheduled for Monday, October 5th, at 9:00am...
Thursday, October 1st, 2009 at 12:00pm.
Agricultural burning is allowed. Suggested burn times are from now until 5:00pm.
Propane flaming is allowed from now until 5:00pm.
Straw stack burning is allowed from now until 5:00pm.
A weak warm front was pushing onto the Washington Coast late
this morning. Satellite imagery showed cloudy skies covering
most of western Washington and extreme northwestern Oregon.
Spotty light rain was falling mainly over northern sections
of western Washington. No rain was being reported over
Oregon, although some possible sprinkles were showing up on
Doppler radar near the north coast. Astoria picked up .03
inches of rain between 5am and 11am with .01 inches falling
as far south and east as Scappoose.
Mainly just middle and high clouds extended as far south and
east as the Willamette Valley, with considerable filtered
sunshine. Skies were mostly sunny along the central and
south coast as well as over southwestern Oregon. Midday
temperatures had warmed into the upper 50s and low 60s across
western Oregon. Winds were from the SSE at less than 10 mph.
The air mass is still cold, for early October. The freezing
level, early this morning, over Salem was just 6700 feet.
However, some warming aloft and filtered sunshine this
afternoon should combine to lift Willamette Valley
temperatures into the mid 60s. That is still about 5
degrees below average but a good half-dozen degrees warmer
than Wednesday afternoon.
A weak cold front is forecast to push across western
Washington this evening and southeastward across the
Willamette Valley overnight. Clouds will be on the increase
along the a chance of light rain. Total rainfall amounts,
from the cold front, are forecast to be very light...ranging
from little or nothing to around one-tenth of an inch.
SSE 5-10 mph...becoming SSW 5-10 late this afternoon.
SW 10 this afternoon.
Atmospheric Ventilation Conditions:
Maximum mixing height today will be near 3500 feet. Ventilation index 35.
Salem\'s high temperature today will be near 66.
Minimum relative humidity will be near 48%.
Salem sunset tonight: 6:52pm; sunrise tomorrow: 7:12am.
In the wake of the weak cold front, forecast to move
southeastward across the Willamette Valley early Friday,
another quite strong and cool upper-level trough will drop
into the Pacific Northwest. Showers will likely increase
across Washington and northern Oregon Friday, with scattered
showers over all of Oregon Saturday. Snow levels will drop
to as low as 3000 feet Saturday, with minor snow
accumulations over the Cascade passes possible.
The upper-level trough is forecast shift east of the
Cascades Sunday, with the showers tapering off across
western Oregon. The trough will progress eastward, into
Idaho, Monday, with a drier, but continued cool,
north-northeasterly flow aloft developing. An upper-level
ridge is forecast to slowly build into the coastline next
week, with dry and progressively warmer early-autumn weather.
Tomorrow (02 Oct): Mostly Cloudy. Increasing Chance of Showers From North to South. 47/63
Sat (03 Oct): Showers Likely. Slight Chance of T-Storms. Snow Level 3-4000 Feet. 43/59
Sun (04 Oct): Mostly Cloudy and Cool. Decreasing Chance of Showers. 41/63
Mon (05 Oct): Patchy AM Fog or Low Clouds...Mostly Sunny in the Afternoon. 39/67
Tue (06 Oct): Patchy AM Fog....Sunny and Warmer. 42/73
Wed (07 Oct): Patchy AM Fog...Sunny and Warm. 43/75
Thu (08 Oct): Patchy AM Fog...Sunny and Warm. 44/78
weather at oda.state.or.us
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