Wonder Wednesday: Pressure Systems

Weather
Multiple highs and lows on map. Picture courtesy of scijinks.gov.

If we look on a weather map, we may see two letters floating around in different areas. Those letters are ‘H’ and ‘L’, which represent high and low pressure systems, respectively. Each system has a few things that are associated with their functionality, but are direct opposites of each other, similar to hot and cold or up and down.

High pressure systems are associated with lighter wind speeds, sunny skies, and more dry conditions. With a high, the cooler air sinks from above and warms up as it gets closer to the surface of the planet. This will give the clear skies and fair weather. Winds will also go in a clockwise motion (known as anticyclonic). With higher pressure systems, there is more space for molecules to move around, so there’s typical less stored energy and this is when we get our sunshine.

Wind directions with High and Low pressure systems. Picture courtesy of wikimedia.commons.

Low pressure systems don’t always mean storms and destruction, but in some cases, they can. Hurricanes and typhoons are large-scaled low pressure systems. However, some low pressure systems will just bring rain showers and cloudy conditions. Quite the opposite of high pressure systems, the warm air rises from the surface of the Earth, and cools as it rises. The direction of this air also circulated in a counterclockwise motion (known as cyclonic). The lower the pressure, the tighter the area, or gradient, and the more severe the systems of showers can be. Unlike highs, lows can also carry a front of some sort (typically leading with a warm or stationary front, and trailing with a cold front).

Copyright 2021 Nexstar Media Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

Clear

San Angelo

78°F Clear Feels like 82°
Wind
9 mph S
Humidity
73%
Sunrise
Sunset

Tonight

Generally clear skies. Low 72F. Winds S at 5 to 10 mph.
72°F Generally clear skies. Low 72F. Winds S at 5 to 10 mph.
Wind
9 mph S
Precip
2%
Sunset
Moon Phase
Waxing Gibbous
Clear

Robert Lee

77°F Clear Feels like 77°
Wind
11 mph S
Humidity
76%
Sunrise
Sunset

Tonight

Generally clear skies. Low 72F. Winds S at 10 to 15 mph.
72°F Generally clear skies. Low 72F. Winds S at 10 to 15 mph.
Wind
11 mph S
Precip
2%
Sunset
Moon Phase
Waxing Gibbous
Clear

Eldorado

76°F Clear Feels like 76°
Wind
11 mph S
Humidity
76%
Sunrise
Sunset

Tonight

Some clouds. Low 71F. Winds S at 10 to 15 mph.
71°F Some clouds. Low 71F. Winds S at 10 to 15 mph.
Wind
12 mph S
Precip
3%
Sunset
Moon Phase
Waxing Gibbous
Clear

Mertzon

77°F Clear Feels like 77°
Wind
15 mph S
Humidity
73%
Sunrise
Sunset

Tonight

Partly cloudy skies. Low 71F. Winds S at 10 to 20 mph.
71°F Partly cloudy skies. Low 71F. Winds S at 10 to 20 mph.
Wind
14 mph S
Precip
2%
Sunset
Moon Phase
Waxing Gibbous
Clear

Eden

75°F Clear Feels like 75°
Wind
10 mph S
Humidity
80%
Sunrise
Sunset

Tonight

A few clouds. Low 71F. Winds S at 10 to 15 mph.
71°F A few clouds. Low 71F. Winds S at 10 to 15 mph.
Wind
11 mph S
Precip
2%
Sunset
Moon Phase
Waxing Gibbous
Clear

San Angelo

79°F Clear Feels like 83°
Wind
9 mph S
Humidity
72%
Sunrise
Sunset

Tonight

Mostly clear. Low 73F. Winds S at 5 to 10 mph.
73°F Mostly clear. Low 73F. Winds S at 5 to 10 mph.
Wind
9 mph S
Precip
2%
Sunset
Moon Phase
Waxing Gibbous
Clear

Robert Lee

77°F Clear Feels like 77°
Wind
11 mph S
Humidity
76%
Sunrise
Sunset

Tonight

Generally clear skies. Low 72F. Winds S at 10 to 15 mph.
72°F Generally clear skies. Low 72F. Winds S at 10 to 15 mph.
Wind
11 mph S
Precip
2%
Sunset
Moon Phase
Waxing Gibbous
Clear

Eldorado

76°F Clear Feels like 76°
Wind
11 mph S
Humidity
76%
Sunrise
Sunset

Tonight

Some clouds. Low 71F. Winds S at 10 to 15 mph.
71°F Some clouds. Low 71F. Winds S at 10 to 15 mph.
Wind
12 mph S
Precip
3%
Sunset
Moon Phase
Waxing Gibbous
Clear

Mertzon

77°F Clear Feels like 77°
Wind
15 mph S
Humidity
73%
Sunrise
Sunset

Tonight

Partly cloudy skies. Low 71F. Winds S at 10 to 20 mph.
71°F Partly cloudy skies. Low 71F. Winds S at 10 to 20 mph.
Wind
14 mph S
Precip
2%
Sunset
Moon Phase
Waxing Gibbous
Clear

Eden

75°F Clear Feels like 75°
Wind
10 mph S
Humidity
80%
Sunrise
Sunset

Tonight

A few clouds. Low 71F. Winds S at 10 to 15 mph.
71°F A few clouds. Low 71F. Winds S at 10 to 15 mph.
Wind
11 mph S
Precip
2%
Sunset
Moon Phase
Waxing Gibbous

KLST Weather

More KLST Weather

Last Week to Enter and Win!

Skylive Cameras


Water Conservation Status

Standard Conservation

San Angelo is in standard conservation, which restricts outside watering to twice every seven days at no more than 1 inch per week, no watering between noon and 6 pm. Runoff of more than 150 feet down any street, gutter, alley or ditch is prohibited.

Report watering violations by clicking on https://www.cosatx.us/departments-services/water-conservation/report-a-water-violation or calling 325-657-4409. Do your part; be water smart!