METEO 101 Lesson 1 Images
Lesson 1. An Introduction to Atmospheric Variables
Making Observations of the Atmosphere
tornadoes

Text description of the tornadoes image.
The image shows a tornado on the ground in an open field. A cloud of debris can be seen being kicked up from the base of the tornado. In contrast, a single white wind turbine stands to the right of the tornado. The field in the foreground is flat with a golden-brown hue from dry grass and crops.
Does Anybody Really Know What Time It Is?
Larger image of time zone map

Text description of the time zone map.
The image is a map displaying time zones across North America, parts of South America, and the Atlantic Ocean for 1500 UTC. Countries and regions are highlighted in various shades of green, indicating different time zones. Each time zone is marked with a label, such as UTC-9, UTC-8, etc. The map includes reference lines marking each hour from 0600 to 1600, aligned with the top of the image. The background of the map is purple, representing bodies of water. Time zones are outlined with straight, vertical lines. The image prominently highlights the UTC region with a red label.
Taking Temperature
mostly of nitrogen and oxygen molecules

Text description of the mostly of nitrogen and oxygen molecules image.
The image shows a visual representation of the principal gases in the lower atmosphere using balloons of different colors and sizes. On the left, a large orange balloon labeled "Nitrogen 78%" represents the most abundant gas. To its right, a slightly smaller red balloon labeled "Oxygen 21%" follows. Further to the right, a small green balloon is labeled "Argon 0.9%." Next, a blue balloon labeled "Water Vapor 0 to 4%" is depicted as having three overlapping layers, symbolizing variation, and is similar in size to the green balloon. Finally, a tiny purple balloon labeled "Carbon Dioxide 0.042%" is shown. Above the balloons, the heading reads "Principal Gases of the Lower Atmosphere."
(near Beaver Creek) in the Yukon Territory of Canada

Text description of the (near Beaver Creek) in the Yukon Territory of Canada image.
The image is a map illustrating the northern and western regions of Canada, highlighting the provinces and territories. The map is predominantly colored in various shades of green, while the water bodies are shown in light blue. The Yukon Territories is marked in lime green, with "Beaver Creek" labeled in red text. Other areas such as British Columbia, Alberta, Saskatchewan, Manitoba, Northwest Territories, and Nunavut are labeled in black text. Significant water bodies, like the Pacific Ocean and Hudson Bay, are labeled in white text.
rain froze after it hit the ground, trees, and power lines

Text description of the rain froze after it hit the ground, trees, and power lines image.
The image captures a winter scene showcasing a network of tree branches in the foreground, coated with a layer of ice. Behind the branches, a snow-covered landscape stretches out, featuring a road partly visible, and bordered by more trees and houses in the distance.
Viewing Visibility
panoramic view on a wintry day

Text description of the panoramic view on a wintry day image.
The image is a panoramic view of downtown State College under an overcast sky. In the foreground, various buildings are visible, primarily constructed from red brick, with a mix of campus buildings and residential homes. Down below, there are streets lined with bare-branched trees, parked cars, and sidewalks. In the distance, a misty outline of hilly terrain is visible. The landscape is slightly dusted with patches of snow, particularly noticeable on open spaces and rooftops and the athletic fields on the right side of the image.
very dense fog

Text description of the very dense fog image.
The image shows the Golden Gate Bridge partially shrouded in thick fog. The distinctive red-orange color of the bridge stands out against the white fog, which obscures much of the background and the upper parts of the structure. The bridge's vertical cables are visible extending upwards into the fog, while the roadway is slightly visible with a few cars faintly seen to the left. A street lamp and a viewing telescope are also present on the bridge.
fierce blowing and/or falling snow

Text description of the fierce blowing and/or falling snow image.
The image portrays a desolate road enveloped in a blizzard. The road, partially visible, stretches into the distance, disappearing into the dense snowfall. Flanking the road are utility poles with lines extending overhead into the white haze. On the right side, blurred outlines of leafless trees and a faint structure, possibly a house, emerge through the swirling snow.
blowing sand/dust

Text description of the blowing sand/dust image.
The image depicts three soldiers walking through a dense sandstorm. The visibility is extremely low due to the thick, swirling dust, giving the entire image a uniform, orange-brown hue. The soldiers, dressed in camouflage uniforms and helmets, are walking in a line, with the middle soldier slightly ahead. Each soldier carries a rifle, and their silhouettes are blurred by the storm. The ground is scattered with small rocks and appears barren and flat. The overall atmosphere conveys harsh weather conditions and a challenging environment.
smoke

Text description of the smoke image.
The image depicts a mountainous landscape shrouded in smoke. In the foreground, rocky terrain slopes gently downward, covered with sparse patches of dry grass and small boulders. Beyond this foreground, a series of dark, jagged mountain peaks rise prominently. These mountains appear in a gradient of colors from dark brown to a smoky gray, indicating the distance and haze. Snow patches cover parts of the mountains. The sky above is mostly obscured by smoke or mist, dulling the overall brightness and providing a muted, pastel tone to the scene.
clean atmosphere

Text description of the clean atmosphere image.
The image portrays Penn State's campus and downtown State College with a backdrop of green hills under a clear blue sky. In the foreground, a mix of old and modern buildings are visible, most are made of red brick but they vary in building height and shape. Trees are interspersed among the buildings, adding greenery to the scene. In the background, the terrain gently rises into a range of hills.
hazy atmosphere

Text description of the hazy atmosphere image.
The image portrays Penn State's campus and downtown State College with a backdrop of green hills under a clear blue sky. In the foreground, a mix of old and modern buildings are visible, most are made of red brick but they vary in building height and shape. Trees are interspersed among the buildings, adding greenery to the scene. In the background, the terrain gently rises into a range of hills. The hills in the background are partially obscured by a hazy sky.
flow chart

Text description of the flow chart image.
The image is a flowchart with a white background, displaying a decision-making process about the display of present weather symbols. The flowchart is oriented vertically and primarily uses purple diamond-shaped decision boxes connected by black arrows. At the top, the chart begins with the question "Should a Present Weather Symbol Be Displayed?" An arrow points down to the first decision diamond labeled "IS PRECIPITATION FALLING?" with two arrows stemming from it. To the right, "YES" leads to the instruction "Display the appropriate precipitating weather symbol (rain, snow, drizzle, etc)." Below, "NO" leads to another decision diamond reading "IS VISIBILITY LESS THAN 7 MILES?" Again, two branches stem from it: "YES" to the right leads to "Display the appropriate non-precipitating weather symbol (fog, haze, blowing snow, etc)," and "NO" continues downward to "No Present Weather Symbol Needed."
Transcribed Text:
Should a Present Weather Symbol Be Displayed? IS PRECIPITATION FALLING? YES Display the appropriate precipitating weather symbol (rain, snow, drizzle, etc) NO IS VISIBILITY LESS THAN 7 MILES? YES Display the appropriate non-precipitating weather symbol (fog, haze, blowing snow, etc) NO No Present Weather Symbol Needed
view of Eyjafjallajökull eruption from space

Text description of the view of Eyjafjallajökull eruption from space image.
The image is a satellite view showing the volcanic eruption of Eyjafjallajökull in Iceland. A large brownish-gray plume extends from the volcano towards the bottom left of the image, spreading ash across the sky. The top portion of the image shows snow-covered peaks with visible white snow caps, while the lower portion depicts the dark blue of the Atlantic Ocean. Clouds are scattered over the ocean.
Making Do with Dew Points
image of a steaming tea kettle

Text description of the image of a steaming tea kettle image.
The image shows a metal kettle with steam visibly escaping from its spout. The kettle has a shiny metal surface with a slightly curved handle on top. The steam is thick, white, and flows upward into the air, with a stark contrast against the dark background. The spout of the kettle is open, allowing the steam to release freely. The background is a deep black, enhancing the visibility of the steam.
annotated image of the tea kettle

Text description of the annotated image of the tea kettle image.
The image shows a close-up of a metal kettle with steam emitting from its spout. The kettle is silver with a hinged cap on the spout, partially open. Steam is visibly rising, with labels indicating "Water Vapor" near the spout and "Condensed (liquid) Water" slightly further away in the denser, whiter area of steam. The background is dark, emphasizing the brightness of the steam. The bottom right of the image credits the photographer, David Babb.
frost

Text description of the frost image.
The image shows a close-up of a brown leaf on the ground with a thin layer of frosty ice crystals along its edges, giving a textured and jagged appearance. The background features green frosty grass. A red rectangle in the bottom corner provides a zoomed in look of the edge of the frosty leaf. The frost appears as small, spiky formations, sharply contrasting against the brown leaf and green grass.
Persian Gulf

Text description of the Persian Gulf image.
The image is a map highlighting the Middle East region. It includes countries such as Saudi Arabia, Iran, Iraq, Afghanistan, Turkey, and several others. The map uses various shades of beige, green, and blue to differentiate land from bodies of water. Major bodies of water, such as the Red Sea, Persian Gulf, and Arabian Sea, are shown in blue. Capital cities like Riyadh, Tehran, and Baghdad are marked with bold black dots. A red marker pinpoints a location in the Persian Gulf. Some major cities, country boundaries, and neighboring regions like Egypt, Sudan, and India are also visible.
00Z station model observations on July 20th

Text description of the 00Z station model observations on July 20th image.
The image is a detailed surface analysis map showing station plots across the Midwest. On the station plots, temperature is marked in red, dew point in green, pressure in blue and the city (airport code) in grey. Wind barbs indicate wind speed and direction, and a small green circle marks the location of the station and gives sky cover information. Some stations contain pink symbols that highlight different precipitation. The top right corner contains a timestamp, indicating the data was recorded on July 20, 2011.
station model plot from 11Z on a bitterly cold January day

Text description of the station model plot from 11Z on a bitterly cold January day image.
The image is a detailed surface analysis map showing station plots across the upper Midwest. On the station plots, temperature is marked in red, dew point in deep green, pressure in blue and the city in grey. Wind barbs indicate wind speed and direction, and a small green circle marks the location of the station and gives sky cover information. Some stations contain pink symbols that highlight different precipitation. A red circle is drawn around stations in northern Minnesota and highlights the extreme cold, where temperatures are as low as -40. In the upper right corner, there is a timestamp in blue text indicating "1107 UTC 16 Jan."
station model plot for Alaska

Text description of the station model plot for Alaska image.
The image is a detailed surface analysis map showing station plots across the Alaska. On the station plots, temperature is marked in red, dew point in deep green, pressure in blue and the city in grey. Wind barbs indicate wind speed and direction, and a small green circle marks the location of the station and gives sky cover information. Some stations contain pink symbols that highlight different precipitation. A red circle is drawn around stations in far western Canada and highlights the extreme cold, where temperatures are as low as -46.
Considering Clouds (and Slicing Pie)
photograph shows an example of BINOVC conditions

Text description of the photograph shows an example of BINOVC conditions image.
The image depicts a single hot air balloon floating in a vast, cloudy sky. The balloon is colorful, with visible patterns of yellow, purple, green, and red. The sky is mostly overcast, with large patches of grey clouds dominating the image. In the lower part of the image, silhouettes of tree tops can be seen. A small area of lighter clouds is visible towards the left, with some sunlight filtering through.
FEW

Text description of the FEW image.
The image depicts a scenic view of a mountainous landscape under a bright blue sky dotted with a few fluffy white clouds. In the foreground, a vibrant expanse of green grass and low shrubs is present, interspersed with clusters of coniferous trees that rise prominently from the meadow. The midground features a dense line of evergreen trees, creating a contrasting backdrop against the expansive grassy area. In the distance, rugged mountains are visible, some capped with patches of lingering snow, indicating a cooler climate. The overall composition highlights the natural beauty and serenity of the landscape, emphasizing the vivid greens of the grasses and the rich textures of the trees against the clear sky.
SCATTERED

Text description of the SCATTERED image.
The image depicts a serene mountain lake surrounded by lush greenery and towering trees. In the foreground, the clear water of the lake reflects the bright blue sky, dotted with fluffy, white clouds. The shoreline is characterized by a mix of grassy areas and rocky textures. To the left, a stone wall runs parallel to the water, while the landscape gradually rises into rolling hills and forested slopes in the background. The vibrant greens of the vegetation contrast beautifully with the deep blue of the lake and the sky..
Partly Cloudy or Partly Sunny

Text description of the Partly Cloudy or Partly Sunny image.
The image depicts a panoramic view of a mountainous landscape under a bright sky filled with fluffy, white clouds. The foreground features a grassy area with scattered rocks, leading to a steep valley. In the middle ground, rugged mountains are partially coated in patches of white snow, suggesting a recent melt. The mountains display a mix of dark green forested areas and lighter, rocky terrain. The sky transitions from a deep blue near the horizon to a lighter hue above the clouds, creating a vibrant contrast with the landscape below.
Mostly Cloudy

Text description of the Mostly Cloudy image.
The image depicts a broad landscape characterized by rolling green hills and open fields under a vast sky. The foreground features a grassy area with various patches of darker green vegetation and some sparse shrubs. A sign indicating "North" and "177" is prominently displayed on the left side of the image, suggesting a driving route. The sky is filled with soft, fluffy clouds arranged in patches, with a light blue coloration that transitions to a pale white towards the horizon. In the distance, faint power lines can be seen against the horizon, adding to the rural atmosphere of the scene.
webcam shot of Penn State's Beaver Stadium in dense fog

Text description of the webcam shot of Penn State's Beaver Stadium in dense fog image.
The image is taken from Beaver stadium and shows incredibly dense grey fog across the entire image. There are no distinct features, objects, or textures visible across the surface, and it has a smooth appearance consistent throughout.
striking photograph of the Pine Gulch Fire

Text description of the striking photograph of the Pine Gulch Fire image.
The image shows a dramatic scene of a wildfire at night. A large area of land is engulfed in bright orange flames, stretching across much of the image. Seven firefighters are visible in the foreground approaching the fire. The dark figures are illuminated by the blaze and a bright white light from a firetruck. The sky above is filled with dense, glowing orange smoke that blends into the darkness of the night sky.
Probing Pressure
home barometers

Text description of the home barometers image.
The image depicts a vintage barometer with a square wooden frame and brass corners, resting on a fabric surface with a floral pattern. The barometer's face is circular and features various weather indicators. The outer ring has bold inscriptions indicating weather conditions: "RAIN," "CHANGE," "FAIR," "PLUIE," "VARIABLE," and "BEAU." Additional words "TEMPEST," "STORMY," "TRES SEC," and "VERY DRY" are aligned vertically on the sides. The center has a needle pointing towards the weather predictions, surrounded by a scale marked with numbers representing pressure in different measurements. A small circular design occupies the middle of the face. The top of the frame has a brass loop for hanging.
mercury barometer

Text description of the mercury barometer image.
The image depicts a diagram of a mercury barometer. The central element is a vertical glass tube partially filled with mercury, open at the bottom end, which is submerged in a mercury reservoir. The mercury level inside the tube reaches up towards the top. The height of the mercury column in the tube is marked as 29.92 inches (76 cm), which is the sea-level pressure. The image also includes labeled arrows: a red arrow pointing to the mercury in the tube, a blue arrow indicating the air pressure pushing down on the mercury in the reservoir, and a label pointing to the vacuum at the top of the tube. The reservoir is depicted as a cylindrical container with a beveled edge.
Photograph

Text description of the Photograph image.
The image depicts an elegant mechanical instrument encased in a glass display. The primary feature is a cylindrical chart recorder, which is positioned vertically and includes a patterned grid paper with visible markings for days of the week. This is complemented by a metallic spiral spring to the right, likely functioning as a part of the measuring mechanism. Several brass components, including levers and valves, are intricately assembled within the display case. The wooden base of the apparatus has a rich, polished finish with a subtle shine, and an anchor-shaped metal detail decorates the front. The overall composition is neatly arranged and showcases a blend of craftsmanship and functionality.
We must need a 10 in front of the 046 to give 1004.6 millibars

Text description of the we must need a 10 in front of the 046 to give 1004.6 millibars image.
The image portrays a weather station model symbol used in meteorology to display various weather conditions at a specific location. It features a large black circle that is three-quarters filled, indicating cloud cover. Above this circle, the number "52" is placed, signifying the temperature in degrees Fahrenheit. Just to the right, the number "1004.6 mb" in red and represents barometric pressure in millibars. The portions in red are deleted on the actual station plot, leaving just "046" to represent the pressure. To the right of the circle, the number "+23" depicts the dew point temperature. Below the circle, "46" indicates wind speed in knots. To the left are two black dots and the number "1½," which are additional weather information. A line protrudes from the circle with an extension, denoting wind direction.
barometer app on my phone read 613.07 hectopascals

Text description of the barometer app on my phone read 613.07 hectopascals image.
The image shows a circular barometer gauge against a dark background. The gauge has a black outer rim with a white circular face displaying a range of pressure measurements from 600 to 1100 hPa/mBar. Numeric labels are marked at intervals of 100 along the edge. Three weather icons are depicted inside the circle: a cloud with rain, a cloud with no rain, and a sun, arranged in the middle section. A single orange needle points to approximately 613.07 hPa on the gauge. At the top of the image, typical smartphone icons for time (10:13), connection (LTE), and battery status are visible. At the bottom of the screen, the words "station pressure" and the measurement "613.07 hPa" are displayed.
mean station pressure for the United States

Text description of the mean station pressure for the United States image.
The image is a colorful map depicting the United States with outlines of state boundaries. It shows varying levels of station pressure in millibars, represented by a gradient color scale on the right. The scale ranges from 780 mb in purple to 1020 mb in red. The map highlights a large purple area over the western states, suggesting lower station pressure, transitioning through shades of blue to green, yellow, and eventually red in the eastern areas, indicating higher pressure. The title "NCEP OPERATIONAL DATASET" is printed at the top, and the footer reads "STATION PRESSURE (mb) LONG TERM MEAN."
schematic of the adjustment process

Text description of the schematic of the adjustment process image.
The image depicts a diagram illustrating the relationship between elevation and atmospheric pressure, using Denver as an example. On the left side, a stylized mountain represents higher elevation. The phrase "Sea Level" is placed at the base, indicating the baseline for elevation. Part way up the mountain, a dashed line extends horizontally to a point labeled "KDEN," representing Denver's elevation. A column labeled "Weight per unit area of fictitious column between elevation of Denver and sea level" extends upward. To the right, a horizontal arrow points rightward, labeled "Station Pressure at KDEN," and an additional horizontal arrow below indicates "Sea-level Pressure."
Watching the Wind
image of standard compass angles

Text description of the image of standard compass angles image.
The image portrays a circular compass rose on a beige background. The compass has traditional cardinal and intercardinal points with "N," "E," "S," and "W" for north, east, south, and west. Smaller tick marks and degree markings from 0° to 360° encircle the compass. A colorful, stylized dragon with purple, orange, and green accents is intertwined with the compass. The dragon's body loops around the central compass rose, adding a vivid and artistic element to the otherwise technical illustration.
sustained 50-knot wind at Apalachicola, Florida

Text description of the sustained 50-knot wind at Apalachicola, Florida image.
The image is a detailed surface analysis map showing station models across the Southeast. On the station plots, temperature is marked in red, dew point in deep green, pressure in blue and the city in grey. Wind barbs indicate wind speed and direction, and a small green circle marks the location of the station and gives sky cover information. Some stations contain pink symbols that highlight different precipitation. A red square is drawn around a station in Pensacola, Florida where sustained winds have reached 50 knots.
Station Model Review
No images
METARs (Optional)
close-up aerial view

Text description of the close-up aerial view image.
The image depicts the summit of Mount Washington, covered in extensive snow, set against a background of distant rolling hills and mountains under a clear sky. The summit is home to several structures, including an observatory with a tall antenna and a long, low building with an enclosed walkway. The area is largely devoid of vegetation, emphasizing the stark, icy environment. A few people are visible, offering a sense of scale to the large, flat area atop the mountain. A snowcat vehicle is parked near one of the buildings, indicative of the harsh weather conditions often experienced at this location.