[willamette-fcst] Forecast - Wednesday, January 30th, 2008
Willamette Valley Ag/Burning Forecast
willamette-fcst at listsmart.osl.state.or.us
Wed Jan 30 16:58:01 PST 2008
Daily Smoke Management Forecast
Oregon Department of Agriculture
Smoke Management Program
Weather Outlook and Field Burning Advisory for Willamette Valley Growers and Fire Districts.
Wednesday, January 30, 2008 at 4:45 pm.
Burn Advisory For Thursday, January 31, 2008:
Agricultural burning is allowed. Suggested burn times are from 8:00am until 3:30pm.
Straw stack burning is allowed from 8:00am until 3:30pm.
A cold upper-level trough brought locally heavy rain and
snow showers to Western Oregon early this morning. Many
areas above 500 feet picked up 2-4 inches of snow with wet
snow coating sections of the valley floor. The showers gave
way to more steady rain and slowly rising snow levels, in
advance of the next weather system approaching the
coastline. By late this afternoon, rain was falling across
most of Western Oregon with snow above about 1000 feet in
the coast range and in the Cascades.
The freezing level was measured over Salem early this
morning at 2000 feet and had only risen to 2100 feet by this
evening. Warmer air is moving in aloft ahead of the next
weather system, so the snow levels will slowly climb to
about 2500 feet by tonight. High temperatures today
climbed into the upper 30s and low 40s across the valley and
the mid 40s along the beaches. South winds are increasing
this eveing and are already gusting to about 25 mph in the
valley and to near 40 mph along the coastal strip. Cape
Meares (at 1421 feet near Tillamook) has had a gust to 58 mph.
Steady rain will continue until the front moves through
Western Oregon late tonight. South winds will increase
along the coast, where high wind warnings are in effect for
gusts to 65 mph. The valley will see gusts in the 35 mph
range ahead of the front tonight. More heavy snow will push
into the Cascades and the upper Hood River Valley tonight
and Thursday, where winter storm and heavy snow warnings
have been issued.
A cool trough will bring showers Thursday and Friday with
continued blustery southerly winds. Snow levels will drop
back to about 1000-1500 feet but should not be quite as low
as they have been the past few days. Ventilation conditions
for burning are expected to continue to be good. Lows
tonight will stay in the mid to upper 30s across the valley
with the rainy and windy conditions. Highs tomorrow will
climb into the low 40s with showers and a few sun-breaks.
S 15-25 G30 Thursday morning, S 15-25 G30 Thursday afternoon.
SW 35 Thursday morning, SW 30 Thursday afternoon.
Atmospheric Ventilation Conditions:
Maximum mixing height Thursday will be near 3000 feet. Ventilation index 105.
Salem\'s high temperature Thursday will be near 43.
Minimum relative humidity will be near 82%.
Salem sunrise Thursday: 7:33 am; sunset Thursday: 5:18 pm.
The next system is forecast to take a more southern track
with the low-pressure center taking aim at northern Oregon
or Southwest Washington. That track will keep snow levels
near or below 1000 feet across Western Oregon Saturday.
This storm will be closely monitored for the possibility of
snow levels dropping to the valley floor. If it takes a
track into the Central Oregon Coast, then it could be a
significant snow-maker for the Willamette Valley. If it
tracks further north, into Western Washington, then it will
be a cold rain-maker with brisk south winds. It is too far
out to call at this time.
Super Bowl Sunday looks showery and cool with snow levels at
or below 1000 feet. It appears that a weak ridge will bring
some drying Sunday night and Monday with the next weather
system bringing more rain and mountain snow by Tuesday
afternoon. Another ridge will bring some drying Wednesday.
Thu (31 Jan): Rain and Wind...Turning To Showers. Snow Level Dropping to 1000 Feet. 38/43
Fri (01 Feb): Showers. Snow Level 1000 Feet. 34/42
Sat (02 Feb): Rain or Snow. Snow Level Near or Below 1000 Feet. 33/42
Sun (03 Feb): Rain or Snow Showers...Decreasing Late. Snow Level Near 1000 Feet. 33/42
Mon (04 Feb): Partly Cloudy. 31/43
Tue (05 Feb): Rain and Windy. Mountain Snow. 34/46
Wed (06 Feb): Decreasing Showers. 34/46
Thu (07 Feb): Chance of Rain. 36/46
weather at oda.state.or.us
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