[willamette-fcst] Forecast - Monday, July 9th, 2007
Willamette Valley Ag/Burning Forecast
willamette-fcst at listsmart.osl.state.or.us
Mon Jul 9 13:16:42 PDT 2007
Daily Smoke Management Forecast
Oregon Department of Agriculture
Smoke Management Program
Weather Outlook and Field Burning Advisory for Willamette Valley Growers and Fire Districts.
Monday, July 9th, 2007 at 12:00pm.
Agricultural burning is allowed. Suggested burn times are from now until 7:00pm.
Preparatory burning is allowed from now until 2:00pm with a 100 acre limit.
Propane flaming is allowed from now until 7:00pm.
Stack burning is not allowed.
A weak weather disturbance, sliding across Southern Alberta,
Canada, increased the onshore surface gradients across
Western Oregon today. That forced some marine
low-cloudiness into the Willamette Valley this morning, but
skies were sunny by late this morning. Low clouds were persisting
along most of the Washington and Oregon Coastal Strip at midday.
A strong upper-level ridge of high pressure is forecast to rapidly
build over the Pacific Northwest during the next couple of days.
A surface thermal trough will build west of the Cascades on
Tuesday, resulting in offshore flow and temperatures
climbing to near 100 degrees in the Willamette Valley.
With northeasterly transport winds expected to develop, there may
be a brief burning opportnunity, for Western Willamette Valley
Growers, early Tuesday, before tempertures get too hot. Please
contact your permit agent today, if want to take advantage of this
potential burning opportunity.
NNE 12-17 with gusts to 25 this afternoon.
NNE 20 this afternoon.
Atmospheric Ventilation Conditions:
Maximum mixing height today will be near 5000 feet. Ventilation index 100.
Salem\'s high temperature today will be near 87.
Relative humidity drops to 50% by 3pm.
Minimum relative humidity will be near 31%.
Salem sunset tonight: 9:00pm; sunrise tomorrow: 5:36am.
The upper-level ridge, and associated surface thermal
trough, are forecast to begin to shift into Eastern Oregon
late Wednesday. There may be a burning opportunity, for
Willamette Valley Growers, ahead of this wind-shift
Wednesday afternoon or Thursday afternoon. At this time, it
appears that the marine intrusion will be spread out over a
couple of days and may be accompanied by thunderstorms, so
this burning opportunity may not pan out.
Increasing southerly flow aloft will bring a chance for
thunderstorms, to the Willamette Valley, late Wednesday
through Friday. A more stable and dry southwesterly flow
aloft is forecast to take over beginning Saturday, with
onshore surface flow west of the Cascades.
Tomorrow (10 Jul): Sunny and Hot. 57/100
Wed (11 Jul): Sunny and Hot. 61/98
Thu (12 Jul): Mostly Sunny. Slight Chance of a thunderstorm Late. 63/93
Fri (13 Jul): Moatly Cloudy. Chance of Showers and Thundershowers. 60/78
Sat (14 Jul): Morning Clouds...Afternoon Sun. 55/83
Sun (15 Jul): Partly Sunny. 54/78
Mon (16 Jul): Mostly Sunny. 53/84
weather at oda.state.or.us
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