How to Read the Wethr.net Temperature Chart

Overview of the Wethr.net Temperature Chart

The Wethr.net temperature chart is a powerful tool for visualizing temperature data for a specific ASOS station. It displays a range of temperature-related metrics over a 24-hour period. The chart is designed to help users understand current conditions in near real-time. Below is an example of what a typical Wethr.net temperature chart looks like:

Figure 1: An example Wethr.net temperature chart showing various temperature metrics over time.

6-Hour High

The 6-hour high represents the highest temperature recorded at the station in the past 6 hours. On the chart, it is indicated by a green dot on the far right side of a dashed green line that extends 6 hours horizontally to the left at the reported temperature.

This metric is useful for understanding recent temperature peaks within a short timeframe. In instances where the 6-hour high extends into the previous day, it can not be considered reliable for determining the high of the current day and is not counted towards the Wethr High/Daily High.

Figure 2: A simplified representation of the 6-hour high.

24-Hour High

The 24-hour high shows the highest temperature recorded at the station in the past 24 hours. It is represented by a purple dot on the far right side of a dashed purple line that extends horizontally to the left across the entire chart.

Figure 3: A simplified representation of the 24-hour high (purple dot and dashed line).

DSMs (Daily Summary Messages)

DSMs, or Daily Summary Messages, are represented by a lime green dot on the chart. These are very important to weather market participants and can cause wild swings in the markets when they are released.

The DSM is plotted at the time the highest temperature was observed and may overlap with other elements like the CLI dot, depending on the data.

Figure 4: A simplified representation of the DSM (lime green dot).

CLI (Daily Climate Reports)

CLI, or Climate Reports, are represented by a blue dot on the chart. CLI reports are also critically important to market participants and can cause large swings in price. The CLI often aligns with the DSM but not in every circumstance. The CLI contains the highest temperature recorded in the current day, similar to the DSM.

Figure 5: A simplified representation of the CLI (blue dot).

Public Temperature

The Public Temperature is the official temperature reading reported for the location by most weather sites, represented by the white line on the chart. The public temperature represents an oversimplified conversion from Celsius to Fahrenheit that is generally not a reliable metric when determining the high temperature.

Figure 6: A simplified representation of the public temperature (white line).

Dewpoint

The Dewpoint is represented by the pink line on the chart. The dewpoint indicates the temperature at which air becomes saturated, leading to condensation (e.g., dew, fog, or frost).

When the dewpoint is close to the public temperature, the air is more humid, and condensation is more likely. A larger gap between the public temperature and dewpoint indicates drier air.

Figure 7: A simplified representation of the dewpoint (pink line).

Wethr High / Daily High

The Wethr High is represented by the orange line on the chart. This line indicates the highest temperature Wethr.net can ascertain from the available public data.

It serves as a guide to help users avoid buying shares in dead brackets and as a general idea of what the high temp for the day is so far. It's important to understand however that not all information is public and non-public data isn't typically seen until the DSM is released.

Figure 8: A simplified representation of the Wethr High / Daily High (orange line).

Potential Minimum Temperature

The Probable Minimum Temperature is shown as the light blue line on the chart. This represents the lowest probable temperature for the corresponding observation time.

The Probable Minimum Temperature represents the lower bounds between itself and the Probable Maximum Temperature.

Figure 9: A simplified representation of the probable minimum temperature (light blue line).

Probable Maximum Temperature

The Probable Maximum Temperature is represented by the red line on the chart. This represents the highest probable temperature for the corresponding observation time.

The Probable Maximum Temperature represents the upper bounds between itself and the Probable Minimum Temperature.

Figure 10: A simplified representation of the probable maximum temperature (red line).

Understanding the Chart Legend

The chart includes a legend at the top, which identifies each element:

• 6h: 6-hour high (green dot and dashed line).
• 24h: 24-hour high (purple dot and dashed line).
• Dsm: Daily Summary Messages (lime green dot).
• Cli: Climate Reports (blue dot).
• Pub: Public Temperature (white line).
• Dew: Dewpoint (pink line).
• WH: Wethr High / Daily High (orange line).
• Min: Probable Minimum Temperature (light blue line).
• Max: Probable Maximum Temperature (red line).

The legend helps users quickly identify each line or marker's meaning, making the chart easier to interpret.

Summary

The Wethr.net weather chart provides a detailed view of weather conditions for any location, including:

• 6-Hour High: Green dot and dashed line showing the highest temperature in the last 6 hours.
• 24-Hour High: Purple dot and dashed line showing the highest temperature in the last 24 hours.
• DSMs: Lime green dot representing daily summary messages.
• CLI: Blue dot representing daily climate reports.
• Public Temperature: White line showing the current temperature over time.
• Dewpoint: Pink line showing the dewpoint temperature, indicating humidity levels.
• Wethr High: Orange line showing the expected high temperature.
• Probable Miminum Temperature: Light blue line showing the lowest probable temperature.
• Probable Maximum Temperature: Red line showing the highest probable temperature.

Understanding these components allows users to interpret the chart effectively and make informed decisions.