[willamette-fcst] Forecast - Thursday, May 1st, 2008
Willamette Valley Ag/Burning Forecast
willamette-fcst at listsmart.osl.state.or.us
Thu May 1 15:59:41 PDT 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.
Thursday, May 1, 2008 at 4:45 pm.
Burn Advisory Friday, May 2, 2008:
Agricultural burning is allowed. Suggested burn times are from 10:00am until 6:30pm.
Straw stack burning is allowed from 10:00am until 6:30pm.
A transitory upper-level ridge moved onshore today...drying
out and warming up the air mass over Oregon. A weak warm
front spread mainly middle and high clouds across Western
Oregon this afternoon with mostly sunny skies east of the
Cascades. Doppler radar was showing an area of light rain
along the Central Oregon Coast, and Newport did report some
light rain this afternoon. There is a chance that the light
rain could make it over the coast range and into the
Willamette Valley this evening, but amounts would be very light.
Afternoon temperatures were in the low 50s along the coast
and upper 50s in the Willamette Valley. The southwestern
valleys warmed into the low 60s. Most of Centra and Eastern
Oregon was in the 50s.
The transitory upper-level ridge is forecast to shift east
of the Cascades tonight with increasing areas of very light
rain across Western Oregon tonight and Friday. Cloudy skies
tonight will combine with a warming air mass to hold minimum
temperatures near 40 across Western Oregon, so frost should
not be an issue. Temperatures should still fall below the
freezing mark overnight across much of Central and Eastern
Oregon, but it will not be a cold Friday morning as it was
A weak upper-level trough may keep a few showers going
through much of Saturday...especially over Northern Oregon.
The snow level will hold near 5000 feet Friday and Saturday.
Only a few showers are likely to make it east of the
Cascades late Friday and Saturday. Temperatures will be
near normal Friday with western valley highs likely climbing
into the low 60s. Ventilation conditions are forecast to
improve just enough to allow for stack burning Friday.
SE 5-10 Friday morning, S 5-10 Friday afternoon.
SSE 10 Friday morning, W 5-10 Friday afternoon.
Atmospheric Ventilation Conditions:
Maximum mixing height Friday will be near 3500 feet. Ventilation index 18.
Salem\'s high temperature Friday will be near 61.
Minimum relative humidity will be near 54%.
Salem sunset tonight: 8:18pm; sunrise Friday: 5:59am.
A weak upper-level trough is forecast to maintain a chance
of showers, mainly from the Cascades eastward, Saturday with
a ridge of high pressure bringing warmer and dry conditions
Sunday and Monday. Another upper-level trough will likely
bring an cooler and perhaps damp weather to the region
Tuesday or Wednesday, but it does not appear to be a real
strong or cold system.
Fri (02 May): Light Rain at Times. Snow Level 5000 Feet. 41/61
Sat (03 May): Mostly Cloudy. Slight Chance of Showers. Snow Level 5000 Feet. 43/61
Sun (04 May): Becoming Mostly Sunny and Warmer. 39/67
Mon (05 May): Increasing Clouds Late. 42/70
Tue (06 May): Mostly Cloudy & Cooler. Chance of Showers. Snow Level 5-6000 Feet. 43/65
Wed (07 May): Chance of Showers. Snow Level 5000 Feet. 42/62
Thu (08 May): Slight Chance of Showers. Snow Level 5000 Feet. 39/62
Fri (09 May): Slight Chance of Showers. Snow Level 5000 Feet. 39/62
weather at oda.state.or.us
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