Please answer all questions. Having trouble. Thank you!! Figure 1a is the weathe
ID: 116279 • Letter: P
Question
Please answer all questions. Having trouble. Thank you!!
Figure 1a is the weather map from Sunday morning, 11Z 15 OCT 2017. At this map time, a low-pressure system was centered just to the east of Lake Michigan with a central pressure of 999 millibars. A lengthy cold front extended generally southwestward from the center of the Low to Texas. An expansive anticyclone followed the progression of this low pressure system, ushering in cooler air into the Great Basin region and High Plains, indicative of cooling higher latitudes at this time of year. Figure 1b is presented to show the 3-hour progression of this cold front and the attendant changes in weather with its passage.
1. The cold front extending from the Lake Michigan low-pressure center was advancing generally toward the ________ as evinced from its passage through the cities of Chicago and St. Louis from Figure 1a to Figure 1b.
[ ] northeast
[ ] southeast
[ ] southwest
2. Green Bay, Wisconsin, located just behind the front in Figure 1a, had a temperature of 48°F and dewpoint of 48°F at map time. The fact that these observations at the surface did not differ, indicated the surface air was saturated. This is confirmed by the present weather symbol at the station model, which has two dots signifying ________ was occurring.
[ ] fog
[ ] rain
[ ] haze
3. The advancing front ________ have provided a lifting mechanism for the air leading to clouds and precipitation.
[ ] would
[ ] would not
4. The large air mass ahead of the cold front and generally occupying the southeastern portion of the cyclone was abnormally warm for this time of year. This air mass also had a higher moisture content, as indicated by the generally higher dewpoint values. In the morning hours during the Fall season, ________ is (are) often present as indicated by the current weather symbols in Portland, ME, Atlanta, GA, and Washington, DC of Figure 1a.
[ ] drizzle
[ ] fog
[ ] thunderstorms
5. Radar shadings in Figure 1a indicate where the NWS network of weather radars was detecting precipitation (as a composite). The intensities of the echoes according to the scale at the left edge of the map were related to precipitation rates. From the map display in Figure 1a, precipitation was broadly located generally: ________.
[ ] in a semi-curved band on the forward flank of the cold front
[ ] widely spread in central and southern California
[ ] in both of these locations
6. Precipitation was also scattered ________.
[ ] over the eastern Great Lakes into Ontario, Canada ahead of a warm front
[ ] in North Dakota associated with a trough of lower pressure
[ ] in both of these locations
Figure 2 is a water vapor image acquired at 1115Z 15 OCT 2017, essentially the same time as Figure 1a surface weather map. The animation provided in the caption (as a link) ends within an hour of the Figure 2 timestamp. The brighter the white pixels in the image, indicate where there is a greater concentration of moisture content in the middle troposphere. Clouds can be assumed to exist where brightest white pixels are observed.
7. Lumpy bright white shadings in Figure 2 (and animation) generally ________ match the orientation and progression of the cold front from its surface map symbols (Figure 1a and 1b).
[ ] did
[ ] did not
8. Expansive bright shadings ________ generally coincident with the warm front as it stretched into Canada.
[ ] were also
[] werenot
9. Behind the cold front, in Figure 2, a broad arc of darker shadings extending from Nevada into Iowa are evident. Using Kansas as an example, Figure 1a and 1b indicate that surface stations in most of these states ________ observing clear skies.
[ ] were
[] werenot
10. The bright satellite shading of bright-white pixels moving into the eastern Great Lakes and as a slightly curved line through the cities of Chicago and St. Louis ________ (approximately) coincide with the surface map’s display of precipitation as shown by the radar shadings.
[ ] did
[ ] did not
Figure 3 is the one-day, water-equivalent total precipitation ending at 1200Z on 15 OCT 2017 over the U.S. from NOAA’s National Weather Service’s Advanced Hydrological Prediction Service. Figure 1a showed the Low centers and frontal positions near the conclusion of the total precipitation mapping in Figure 3. Shadings indicate precipitation totals according to the scale along the right margin of the image.
11. The greatest precipitation amounts are shown as a red streak in northern Illinois and Indiana, as well as Missouri. These shadings of the heaviest precipitation ________ generally occur where precipitation had been indicated by radar echoes in Figure 1a, as well as the bright white cloud tops of Figure 2. While the surface maps are of a single time, the conditions depicted in Figure 3 were representative of the several hours where the fronts associated with the low-pressure systems passed across the area.
[ ] did
[ ] did not
12. The intense red shadings of heavy precipitation ________ generally fall slightly to the south of the central area of low pressure in Figure 1a and the Figure 2, water vapor “swirl.”
[ ] did
[ ] did not
13. According to the precipitation scale, the red-orange shade covered a narrow band in Illinois and Indiana where the daily total precipitation was at least ________ inches.
[ ] 0.5
[ ] 1.0
[ ] 2.0
[ ] 4.0
14. The heaviest band of precipitation in Figure 3 was oriented along an a ________ axis, mirroring the movement of the fronts from Figure 1a to Figure 1b.
[ ] west-east
[ ] north-south
Explanation / Answer
1) southwest
2) rain
3)would
4)drizzle
5)in both of these locations
6)in North Dakota associated with a trough of lower pressure
7)did
8)were also
9)were
10)did not
11)did
12)did not
13)4.0
14)north-south