Fire Weather 24-hour Trend Monitor Help Page

MesoWest has been designed for use by National Weather Service meteorologists and other professionals for protection of life and property. Comments/suggestions for improvement may be sent to

The MesoWest Fire Weather 24-hour Trend Monitor displays 24-hour trends in observations for stations within the selected region. This interface is often utilized for fire weather purposes to view trends in temperature, moisture, and wind.

The user can change multiple settings to display data, these settings are...

"X"-h Summary: The user can select how many hours of observations to compute 24-hour trends for. By default observations from the most recent 2 hours are shown and used in 24-hour trend calculations.

Network: The user can choose between the following for network combinations...
NWS: Displays stations that are only a part of the NWS/FAA network.
RAWS: Displays stations that are only a part of the RAWS network.
NWS and RAWS: Displays stations that are a part of either the NWS/FAA or RAWS networks.
SNOTEL: Displays stations that are only a part of the SNOTEL network.
All Networks: Displays all of the stations, regardless of the network.

Region of Interest: The user can choose from a number of different regions to display data. The regions could be one of the following...
GCA: National Interagency Coordination Center (NICC) Geographic Coordinating Area
CWA: National Weather Service County Warning Area
FWZ: National Weather Service Fire Weather Zone

Date and Time: The user can change the date and time (UTC) if they wish to view archived reports instead of current reports. Click "Update Time" after setting the date and time to update the page.

The data is then output into tables in the area below the "Settings" section. There is an option to sort each table by station name or by station elevation.

Station Distribution: The stations are then divided into tables based on the "Region of Interest" chosen...
GCA: Stations grouped by GCA Predictive Service Areas (PSAs).
CWA: Stations grouped by Forecast Zone.
FWZ: Stations grouped by Fire Weather Forecast Zone.
State/Province: Stations grouped by county.

Table Output: The following information is provided within each table. Each row contains a different station.
Station ID and Name: longer station names may be truncated.
Mesonet and Elevation: which network the station belongs to and elevation in feet.
Time: the time (Z/UTC and Local) of the observations shown.
Observation/24-hour Trend: The observation value and the difference between that value and the value recorded 24 hours earlier for... Temperature (Temp)
Dewpoint (DewT)
Relative Humidity (RH)
Wind Direction (Dir)
Wind Speed (Spd)
Wind Gust (Gust)

*Important Notes:

1) Observations and 24-hour trends are color-coded by the quality control flag listed at the top of the table.

The display will auto-refresh with the most current information every 5 minutes, if current data are displayed.