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Recalculating Winds Distribution (FSPro)

After setting all of the parameters on the FSPro Winds screen, clicking Generate Wind Matrix, and looking at the matrix or viewing the Wind Rose, a Fire Behavior Specialist may decide to redistribute values in the matrix using the Recalculate Winds Distribution button located at the bottom of the matrix. There are two common reasons for using Recalculate Winds Distribution is in conjunction with the Add Row and Delete Row buttons.

When using the Add Row button to add a row to the bottom of the matrix, all wind directions will have values of zero. To fill these using the existing parameters, click the Recalculate Winds Distribution button; using Generate Winds Matrix will delete the added row since this button re-generates the wind data using the existing parameters.

When Delete Row is used, the distributions in remaining rows do not change, but the Total Weight of the matrix will continue to decrease as rows are deleted. This means that some wind data are not represented in the matrix. In order to redistribute all of the wind data among existing rows, click Recalculate Winds Distribution. If rows are deleted and Generate Wind Matrix is clicked, the deleted rows will be added back to the matrix. The Delete Row button only deletes from the bottom of the matrix, not the top. Recalculating the Winds Distribution after increasing the Calm Threshold is one way to set low windspeeds to zero, though this is also accomplished by increasing the Calm Threshold and clicking Generate Wind Matrix.

It is possible to use the Recalculate Winds Distribution in other ways. When wind parameters are modified, clicking Recalculate Winds Distribution redistributes the new wind data among the existing wind speed rows and, unlike the Generate Wind Matrix button, rows will not be added or subtracted from the matrix. For example, if an analyst decides to use Gusts instead of Ten Min Avg average winds, it is appropriate to click Generate Wind Matrix to change both the distribution and (in most cases) the highest wind speed row. If parameters are modified (e.g. change Wind Type from Ten Min Avg to Gusts) and Recalculate Winds Distribution is clicked, the new wind data are redistributed within the existing matrix without creating new rows. Use caution when manipulating the wind matrix this way as it may be difficult to defend these types of edits because it can make the values in the wind matrix difficult to interpret and less transparent to another viewer.


Last updated on 12/7/2017 12:52:32 PM.

In This Section

Analysis for Fire Behavior Specialists

See Also

Viewing Fire Behavior Request Details

Accepting or Refusing an Analysis Request

Granting Analysis Privileges

Downloading a RAWS KMZ File

Analysis Notes

About Analysis Shape Files (STFB, NTFB, FSPro)

Drawing a Landscape Extent

Creating a Landscape Editor Rule

Importing Landscape Editor Rules

Creating the Landscape File

Downloading an LCP File

Editing the Landscape File

Modifying Landscape File Parameters

Viewing the Landscape for an Analysis

Generating a Landscape Critique

Downloading a Landscape Critique

Basic Fire Behavior (BFB)

Running a Basic Fire Behavior (BFB) Analysis

Copying an Existing Basic Fire Behavior Analysis

Analyst_Assisted Short Term Fire Behavior (STFB)

Running a Short-Term Fire Behavior (STFB) Analysis

Copying an Existing Short-Term Fire Behavior Analysis

Near-Term Fire Behavior (NTFB)

Running a Near-Term Fire Behavior Analysis (NTFB)

Setting Up Burn Periods for NTFB

Using Gridded Winds (BFB, STFB)

Modifying Wind Information (BFB, STFB)

Modifying Fuel Moistures for Fire Behavior Analysts

About Weather Station Information (BFB & STFB, NTFB, FSPro)

About FWX Weather Files

Downloading FWX Weather Files (FSPro)

Weather Station Availability for Fire Behavior Analysis

Generating Hourly Weather Forecasts

Viewing and Modifying Weather Summary Data (BFB, STFB & NTFB)

Copying an Existing Near-Term Fire Behavior Analysis

Creating an FSPro Analysis

About General FSPro Input Parameters

FSPro Information Menu Option

About Run FSPro Status

Monitoring FSPro Run Status from the Analysis List

About the Date Filter (FSPro)

Copying an Existing FSPro Analysis

About the ERC Stream (FSPro)

About ERC Classes (FSPro)

Setting up FSPro Winds

Editing the FSPro Wind Matrix

Adding or Deleting Rows to the Winds Matrix (FSPro)

Downloading Winds (FSPro)

Interpreting the Winds Rose (FSPro)

Downloading an Analysis KMZ File

Near Term Fire Behavior Results Downloads

FSPro Fire Behavior Results Downloads

Viewing Analysis Notes

Viewing Analysis Results

Viewing the Analysis Report


Field Descriptions

Glossary Resources

Spatial Data Reference

Landscape Data Source Reference

Relative Risk Reference

Organization Assessment Reference

Fire Behavior Reference

About the WFDSS Decision Editors