MesoWest Fire Weather Monitor

MesoWest has been designed for use by National Weather Service meteorologists and other professionals for protection of life and property. Comments and suggestions for improvement are encouraged and can be sent to meteo-mesowest@lists.utah.edu.

The Fire Weather Monitor is designed to display a list of those weather stations whose weather variables exceed values set by the user. The monitor is updated every 5 minutes.

Settings

The user can change the settings as follows:

• Boolean Operators
  • And (default value): Lists stations for which all of the selected thresholds have been exceeded at the same time during the selected time period. If all the conditions are satisfied at a station more than one time, then the most recent observation will be displayed. When the boolean operator And is selected, only one gust and RH threshold are active. For example, if values are entered in both RH options, then only the "RH less than" value will be used. If the threshold "RH less than" is left blank and the threshold "RH greater than" has a value entered, then the latter threshold will be used.
  • Or: Lists all the stations that have exceeded the threshold value for each variable during the selected time period. The stations will be listed in descending order for each variable. For each station, only the most extreme value that occurred in the time period will be listed.
• The number of hours from the most recent time for which the database will be searched
• network type: RAWS, NWS/FAA and RAWS, or all networks
• region of interest: GACC, County Warning Area, Fire Weather Zone, or State
• Variable Thresholds:
  • Sustained wind speed (mph) in excess of
  • Gust (mph) in excess of (two thresholds available)
  • Relative humidity (RH) less than
  • Relative humidity (RH) greater than
  • To not use one or more of the thresholds, leave the threshold blank