These "right movers" may be difficult to see on looping Base Reflectivity images, but the rainfall pattern they leave behind can be invaluable in knowing which storms require extra attention. This is valuable information as storms that tend to move right of the main airflow, either in a straight line or curved path, are often capable of producing severe weather. Sometimes they curve, as in the case of the two small storms to the right of #2. Thunderstorms also do not always move in straight lines. They can move left or right of the upper level flow. The first thing to notice is that storms DO NOT always move parallel to the upper level winds. However, at #1, there are storms moving in three directions. The overall motion of the storms is indicated by the large yellow arrow. Only the red form is stable, the yellow form is a transient species. The mechanism behind this color change is not clear. Along with estimating rainfall, both the static and looping One-hour Precipitation images can provide other useful information, making it a good way to track individual storms. Initially, the color of HgI 2 is yellow, but the color quickly changes to orange/red. Thunderstorms with wet hail will overestimate the amount of precipitation, and the larger the hailstones, the greater the overestimate.Īs the name states, this image (below) shows the estimated precipitation during the previous hour. Precipitate: On saturation, a dissolution reaction runs backward, leading to insoluble reactant formation from products, i.e., precipitation. Second, wet hail is an excellent reflector of energy. Always check nearby radars to see if they are reporting similar information to what is viewed by your local radar. Conversely, a "cool" radar will underestimate the precipitation. It is used as a coloured pigment in situations where its toxicity is not important. If the radar is "hot" (reporting echoes too strong), then the rainfall estimates will be an overestimate. To determine accumulated precipitation at greater distances, you should look at adjacent radars.Īs in the case of other Doppler radar images, there needs to be some caution in viewing the images as there are two main factors to consider:įirst, while the radar does a great job at correcting itself, there are times when it will be out of calibration. They will not display accumulated precipitation more than 124 nautical miles away, even though precipitation may be occurring at greater distances. The maximum range of these two images is 124 nautical miles (143 statute miles/230 kilometers) from the radar location. There are two precipitation images made available via the web: One-hour Precipitation and Storm Total Precipitation. Tsunami Preparedness and Mitigation: Individuals (You!).Preparedness and Mitigation: Communities.The Positive and Negative Side of Lightning.
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