Current temperature humidity and dewpoint in Emigsville, Pennsylvania
High and low is defined by a 24 hour period beginning at midnight.
(Data transfer to this page is dependent on Paulâ€™s computer being booted up.)
Rainfall totals for today
Storm rain is the amount of rain that falls in one storm event; defined by the when the rain sensor begins and ends recording rainfall. For total rain this year, see the accumulated data page. The storm total resets with each rain event.
Rain Rate is defined as the rate at which rain falls and what it would equal if it kept raining at that rate for one hour. For example: It may say 10 in/hr, but the rain may only be falling at that rate for 5 minutes. A high rain rate over time is a good indication that flooding will occur.
Barometric Pressure for today
Changes in barometric pressure can be used to help predict weather. This is the scale used to define the H’s and L’s on TV weather maps.
A “high”is an area where the air’s pressure is higher than the pressure of the surrounding air. A “low’ is where it’s lower. Meteorologists don’t have any particular number that divides high from low pressure; it’s the relative differences that count.
The pressure is high at the surface where air is slowly descending â€” much too slowly to feel. And, this is going on over a large area, maybe a few hundred square miles. As air descends, it warms, which inhibits the formation of clouds. This is why high pressure is generally â€” but not quite always â€” associated with good weather.Link to a story about this http://www.usatoday.com/weather/tg/whighlow/whighlow.htm
Wind speed at the time the measurement was taken.
High is the maximum wind speed for the day
Average wind speed is the speed of the wind in a 10 minute interval before the time stamp in the image
Wind chill is the apparent temperature felt on exposed skin due to the combination of air temperature and wind speed.