WARNING: The Wind (.WND) File has been deprecated with version 6.1. Weather (.WTR) and Wind (.WND) Files can be converted to the Weather Stream (.WXS) File format with the Utilities > WND and WTR to WXS command.
The Wind (.WND) File is an optional ASCII text file required to utilize the optional dead fuel moisture model in FlamMap. However, only the cloud cover data is used in the dead fuel moisture model. The wind speed and direction data are not used in FlamMap (the speed and direction are constants set in the Winds frame in the Inputs tab of the "Run:" dialog box). So if you are building a Wind (.WND) File to use exclusively in FlamMap you can fill in the wind speed and direction with zeros.
Wind information must be input as a stream of data contained in a Wind (.WND) File. Each Wind (.WND) File must contain data in the space delimited ASCII format specified below. There are a variety of ways to create or edit Wind (.WND) Files,
All inputs MUST be integers. Each column must be space delimited (leave a space between columns). FARSITE and FlamMap allow weather inputs in English or metric units. The units are selected by inserting the word ENGLISH or METRIC as the first line of the Wind (.WND) File.
Month Day Hour Speed Direction CloudCover
Hour is specified as 0-2359, to the nearest minute (integer).
Speed is either the 20ft wind speed specified in miles per hour or the 10m wind speed in kilometers per hour (integer)
Direction is specified in degrees, clockwise from north (0-360), (integer).
CloudCover is specified as a percentage, 0 to 100 (integer).
Note: Wind observations do not have to be on a regular interval. You can, for example, enter wind observations every 10 minutes during the afternoon, and only every 2 hours at night.
ENGLISH
8 10 0 1 54 0
8 10 100 2 67 0
8 10 200 2 102 0
8 10 300 1 166 0
8 10 400 3 319 0
8 10 500 4 251 0
8 10 600 3 245 0
8 10 700 2 15 0
8 10 800 4 116 0
8 10 900 6 91 0
8 10 1000 9 89 0
8 10 1100 9 96 0
Wind (.WND) Files can be generated from hourly WIMS data with FireFamilyPlus. From the menu bar in FireFamilyPlus go to the Weather > Hourly Data Analysis > FarSite Exports command. Make sure you have a FireFamilyPlus database that contains hourly observations.
Wind in FlamMap runs can also be depicted using previously created Wind Grid Files or using the FlamMap WindNinja option.
Farsite simulations can also utilize a WindNinja option.