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<div>SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS</div>
<div>SALEM FORESTRY WEATHER CENTER</div>
<div>OREGON DEPARTMENT OF FORESTRY</div>
<div> </div>
<div>ISSUED: Friday, April 30, 2010 2:35 PM Pete Parsons</div>
<div> </div>
<div>1. DISCUSSION AND FORECAST FOR NORTHEAST FORECAST AREA ZONES 630-638</div>
<div> </div>
<div> SATURDAY</div>
<div> </div>
<div style="padding-left: 36pt; ">A strong northwesterly flow aloft will direct another cool weather system across Washington and Oregon. Showers are likely, especially over the northern mountains. Snow levels will stay near just 4000 feet. Surface temperatures
will remain well below normal. The atmosphere should stay well-mixed in the early morning with continued strong onshore flow. Maximum mixing heights will rise above 5000 feet for good afternoon smoke dispersal conditions</div>
<div style="padding-left: 36pt; "> </div>
<div> OUTLOOK (SUNDAY-TUESDAY)</div>
<div> </div>
<div style="padding-left: 36pt; ">The main jet stream will finally lift north and east, on Sunday, with a weak and transitory upper-level ridge moving over the region. Mostly dry weather is expected, except for a lingering shower in the extreme northern mountains.
The snow level should lift above 6000 feet with weakening onshore flow. Smoke dispersion will remain good. Surface temperatures should recover closer to normal. A cold front is forecast to bring more rain and mountain snow Monday, with snow levels dropping
to 4000 feet north late. Tuesday looks very cool and unstable with numerous showers and a chance of afternoon thunderstorms. Smoke dispersal should be good both days, but temperatures will be unseasonably cool with brisk northwesterly winds. The snow level
could drop below 3000 feet by Tuesday.</div>
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<div>2. DISPERSION</div>
<div> </div>
<div>SATURDAY</div>
<div> </div>
<div>Zone 630 and 632:</div>
<div>Mixing height 3000 - 4000 ft during the morning. Mixing height rises to above 5000 ft during the afternoon then lowers to 3000 - 4000 ft during the evening.</div>
<div> </div>
<div>Transport wind WNW to NW at 15 - 29 mph during the morning. Transport wind increases to WNW to NW at 28 - 48 mph during the afternoon then decreases to WNW to NW at 22 - 38 mph during the evening.</div>
<div> </div>
<div>Surface wind NW to NNW at 10 - 20 mph during the morning. Surface wind increases to WNW to NW at 18 - 32 mph during the afternoon then decreases to WNW to NW at 15 - 25 mph during the evening.</div>
<div> </div>
<div>Zone 633 - 638:</div>
<div>Mixing height 2000 - 3000 ft during the morning. Mixing height rises to above 5000 ft during the afternoon then lowers to 3000 - 4000 ft during the evening.</div>
<div> </div>
<div>Transport wind W to WNW at 18 - 32 mph during the morning. Transport wind increases to WNW to NW at 30 - 50 mph during the afternoon then decreases to WNW to NW at 22 - 38 mph during the evening.</div>
<div> </div>
<div>Surface wind WSW to WNW at 10 - 20 mph during the morning. Surface wind increases to WNW to NW at 20 - 34 mph during the afternoon then decreases to WNW to NW at 15 - 25 mph during the evening.</div>
<div> </div>
<div>OUTLOOK:</div>
<div> </div>
<div>SUNDAY</div>
<div>Mixing height 2400 to 3400 ft during the morning rising above 5000 ft during the afternoon. Transport wind W to NW at 8 - 14 mph during the morning becoming W to WNW at 16 - 26 mph during the afternoon. Surface wind W to NNW at 6 - 10 mph during the
morning becoming W to NW at 10 - 18 mph during the afternoon.</div>
<div> </div>
<div>MONDAY</div>
<div>Mixing height below 1000 ft early rising to 4500 to 5000 ft by late morning rising above 5000 ft during the afternoon. Transport wind SW to W at 20 - 34 mph during the morning becoming W to WNW at 25 - 45 mph during the afternoon. Surface wind WSW to
WNW at 10 - 20 mph during the morning becoming W to NW at 15 - 25 mph during the afternoon.</div>
<div> </div>
<div>TUESDAY</div>
<div>Mixing height 3500 to 4500 ft during the morning rising above 5000 ft during the afternoon. Transport wind WSW to WNW at 10 - 20 mph during the morning becoming WNW to NW at 12 - 22 mph during the afternoon. Surface wind W to NW at 5 - 9 mph during the
morning becoming WNW to NNW at 9 - 15 mph during the afternoon.</div>
<div> </div>
<div>3. BURNING INSTRUCTIONS FOR NORTHEAST OREGON ZONES 630-638</div>
<div> The following considerations should be adhered to in addition to</div>
<div> the requirements of the Oregon Smoke Management Plan. These</div>
<div> Instructions are valid for burning conducted on Saturday, May 1, 2010.</div>
<div> ==================================================================</div>
<div> </div>
<div>Zone 630 and 632:</div>
<div>Avoid ignitions within 12 miles to the WNW through NW of SSRAs. For units that will smolder significantly through the night avoid burning within at least 20 miles to the WNW through NNW in or near drainages leading to SSRAs. Care needed in selecting
units as smoke will likely fumigate along the ground in wind prone areas. </div>
<div> </div>
<div>Zone 633 - 638:</div>
<div>Avoid ignitions within 12 miles to the W through NW of SSRAs. For units that will smolder significantly through the night avoid burning within at least 12 miles to the WSW through NW in or near drainages leading to SSRAs. Care needed in selecting units
as smoke will likely fumigate along the ground in wind prone areas. No additional restrictions necessary. </div>
<div> </div>
<div> =========================================================</div>
<div>4. SPECIAL NOTE:</div>
<div> </div>
<div> The smoke management forecaster is available at (503)-</div>
<div> 945-7401. Please call this number and not individual's </div>
<div> numbers to discuss daily burning. For large burns (over</div>
<div> 2000 tons) or burns extending over a considerable period,</div>
<div> please request a special forecast. Avoid calling before</div>
<div> 8 a.m. and between 2 to 3 p.m.</div>
<div> </div>
<div> This forecast is available on the Internet at: </div>
<div> <a href="http://oregon.gov/ODF/FIRE/fire.shtml/#Smoke_Management"><font color="#0000FF"><u>http://oregon.gov/ODF/FIRE/fire.shtml/#Smoke_Management</u></font></a> </div>
<div> </div>
<div> Please ensure your units have been planned and accomplished by checking: </div>
<div> <a href="http://oregon.gov/ODF/FIRE/SMP/dailysmoke.shtml"><font color="#0000FF"><u>http://oregon.gov/ODF/FIRE/SMP/dailysmoke.shtml</u></font></a> </div>
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