[willamette-fcst] Test Silverton Hills Midday Forecast.doc

Tue Jul 1 11:27:27 PDT 2014

SILVERTON HILLS FIELD BURNING FORECAST

OREGON DEPARTMENT OF FORESTRY WEATHER OFFICE

11:30 AM PDT TUE JUL 1, 2014

BURN ADVISORY:

Test midday update only.

WEATHER DISCUSSION:

Test midday update only.

TODAY'S FORECAST:

Test midday update only.

Salem's high temperature today will be near XX degrees (average is XX).

Relative humidity:  Dropping to XX% by 1 p.m.

Surface winds: X X-XX mph this morning; X X-XX mph this afternoon.

Transport winds: X XX mph this morning; X XX-XX mph this afternoon.

Mixing height: Below XXXX feet throughout the day.

Salem's sunset tonight: 9:02 p.m.

(Salem Airport data for Monday, June 30th: High 87°F; Rainfall: .00")

(Maximum Ventilation Index expected today: XX)

EXTENDED DISCUSSION:

Test midday update only.

The National Weather Service's digital forecast is available at:

http://forecast.weather.gov/MapClick.php?lat=44.90549606158295&lon=-122.8106689453125&site=pqr&unit=0&lg=en&FcstType=text

Notes:

     1.  Mixing height, as used here, is the lowest height at which the

         potential temperature exceeds the potential temperature at the

         surface.  As a practical matter it is the approximate height to

         which a smoke plume will rise assuming good ignition, dry fuels,

         and winds less than about 15 mph.

     2.  Transport winds are a layer average through the mixing height,

         weighted slightly toward the winds at the top of the layer.

     3.  Ventilation Index is the height of the mixing layer (ft) times

         the transport wind speed (mph) divided by 1000.

     4.  Surface wind direction is the general expected wind direction.

         At a specific point surface winds are highly dependent on local

         terrain conditions.

This forecast is provided under an agreement between the Oregon Department

of Agriculture (ODA) and the Oregon Department of Forestry (ODF).  For

information contact ODA at 503-986-4701.

To add/remove your email address from this list, please go to:

http://listsmart.osl.state.or.us/mailman/listinfo/willamette-fcst

Pete Parsons

ODF Meteorologist
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