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The Hurricane is a Category 3 or greater on the Saffir Simpson Hurricane Wind Scale; Surface winds ≥100 knots (115 mph) are occurring, or are expected to occur, in a WFO’s county warning area within one hour, with a valid time of ≤2 hours, except up to 3 hours in extenuating circumstances. Hurricane Statement.
- Zulu, Z, and UTC Time on Weather Maps. One of the first coded pieces of data you might notice on a weather map is a 4-digit number followed by the letters "Z" or "UTC."
- High and Low Air Pressure Centers. The large letters (Blue H's and red L's) on weather maps indicate high- and low-pressure centers. They mark where the air pressure is highest and lowest relative to the surrounding air and are often labeled with a three- or four-digit pressure reading in millibars.
- Isobars. NOAA Weather Prediction Center. On some weather maps, you may notice lines surrounding and encircling the "highs" and "lows." These lines are called isobars because they connect areas where the air pressure is the same ("iso-" meaning equal and "-bar" meaning pressure).
- Weather Fronts and Features. Weather fronts appear as different colored lines that extend outward from the pressure center. They mark the boundary where two opposite air masses meet.
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How do you read a weather map?
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What does a cold front line mean on a weather map?
- High and Low Pressure Areas
- What It Means on The Weather Map
- High and Low Pressure Systems: from Space
- Cold Fronts and Warm Fronts
- Cold Fronts and Warm Fronts: from Space
- Weather Satellites
Earth’s atmosphere is a jacket of gases that surrounds the planet. Although it seems like these gases could easily float away into space, gravity is constantly pulling the atmosphere toward Earth’s surface. The force with which our atmosphere pushes down on a specific location on Earth is called atmospheric pressure. Atmospheric pressure is mainly ...
A high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. A low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air. In general, areas that experience high atmospheric pressure also experience fair weather. Low pressure systems can cause the formation of clo...
From high above Earth, satellites such as GOES-16 keep an eye on the weather brought by low pressure systems. The red “L” on the map above indicates a low pressure system in the Tennessee Valley region. In the video below from GOES-16, you can see what that same low pressure system looks like from a weather satellite.
A warm frontis the transition area where a mass of warm air moves to replace a mass of cold air. On a weather map, a warm front is usually drawn using a solid red line with half circles pointing in the direction of the cold air that will be replaced. Warm fronts usually move from southwest to northeast. A warm front can initially bring some rain, f...
GOES-16 and other weather satellites are also on the lookout for cold fronts and warm fronts and the weather they produce. Below, you can see the comparison of a cold front on a forecast map and a cold front in a satellite image.
Information from weather satellites, such as the GOES-R series and JPSSwill help improve our understanding of Earth’s weather. For example, the GOES-R series provides information about atmospheric water vapor and cloud height right now. This can help meteorologists monitor and track severe weather events, such as storms and hurricanes as they happe...
National Weather Maps. Surface Analysis. Highs, lows, fronts, troughs, outflow boundaries, squall lines, drylines for much of North America, the Western Atlantic and Eastern Pacific oceans, and the Gulf of Mexico.
May 12, 2018 · Cold fronts on a weather map are depicted as a blue line with triangles on it, the triangles indicating the direction of its movement. Image Credit: Met Office UK Warm Fronts
Feb 6, 2024 · Knowing how to read a weather map can help you understand the weather and know what to expect. For example, high pressure (H) areas will have clear skies, while low pressure (L) areas can be stormy. Blue "cold front" lines bring rain and wind in the direction the triangular marks point.
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A weather forecast map is the same map as a regular geographic map, only instead of countries and cities, or topography, it shows the weather. Often, though, you can still see both countries and cities, and landscapes on such a map at the same time. Weather maps are also called synoptic maps or meteorological maps. So what does a weather map show?
