(Solved): 15. Regalling that the heights plotted at individual stations on 500 -mb mags ate in tens of mete ...

15. Regalling that the heights plotted at individual stations on 500 -mb mags ate in tens of meters.(place a Q to the right of the three plotted digits) the coded height at Midland-Qdessa (MAF) in west Texas ('572") indicated \( 500 \mathrm{mb} \) oceurred at m aboyessea leyel. a. 572 b. 572 c. 5720 d. \( 57.200 \) 16. On the 500 -mb map, the station observation for Midland-Odessa shows that, at the 500 -mb pressure level over the station, the temperature was \( { }^{\circ} \mathrm{C} \). a. \( -11 \) b. \( -13 \) c. \( -25 \) d. \( -57 \) 17. The dewpoint at \( 500 \mathrm{mb} \) over Midland-Odessa was \( { }^{\circ} \mathrm{C} \). One of the driest reports on the map! a. \( -25 \) b. \( -31 \) c. \( -45 \) d. \( -57 \) 18. The wind at Midiand-Odessa was generally from the southwest at__knots. (The wind being reported has one flag, and four long feathern) a. 25 b. 30 c. 45 d. 75 Table 8A-2 500-mb radiosonde observations of height, temperature, dewpoint, wind direction, and speed from selected U.S. stations for \( 00 \mathrm{Z} 14 \mathrm{MAR} \) 2021. Numeric wind directions are noted as degrees clockwise from north (0/360) (e.g., wind from the south is \( 180^{\circ} \), wind from the west is \( 270^{\circ} \), etc). 19. From Table 8A-2, stations A, B, and C represent stations located on the Figure \( 8 \mathrm{~A}-5500-\mathrm{mb} \) map from the Southwest, Texas, and the Gulf Coast. Examining those stations' data on the Figure 8A-5 map identifies Station A in Table \( 8 \mathrm{~A}-2 \) to be Station B to be and \( S \operatorname{tation} \mathrm{C} \) to be a. Midtand-Odessa, TX ... Jackson, MS ... Tucson, AZ b. Jackson, MS ... Midland-Odessa, TX ... Tucson, AZ c. Jackson, MS ... Tueson, AZ ... Midland-Odessa, TX d. Tucson, AZ ... Jackson, MS ... Midland-Odessa, TX The pattem of \( 500-\mathrm{mb} \) height contours can be shown by the blue contour lines on Figure \( 8 \mathrm{~A}-5 \). To better visualize the contour pattem on Figure \( 8 \mathrm{~A}-5 \), trace the blue \( 5700-\mathrm{m} \) contour with your finget. (The \( 5700-\mathrm{m} \) contour has a blue numeric label just south of Amarillo. The adjacent \( 5640-\mathrm{m} \) and \( 5760-\mathrm{m} \) contours to its west and east are along the Texas-New Mexico border and Oklahoma. 500 -mb height contours are drawn in intervals of \( 60 \mathrm{~m} \).) 20. The height contour pattem of the \( 500-\mathrm{mb} \) map has a. a deep trough (lower heights) with closed contours in the Four Comers region (AZ, UT, CO, NM) b. a narrow trough in the mid-Mississippi River Valley c. Benerally struight west-east flow across the U.S.-Canada border 21. Figure \( 8 \mathrm{~A}-5 \) also shows that, where contour lines are relatively close, wind speeds are compared to where contour lines are more widely spaced. This principle corresponds to the similar relationship between the spacing of isobars and wind speeds on surface maps. 1. fister b. slower The wind speed comparison shows that as altitude in the atmosphere increases, wind specds generally increase. This relationship results in part from the absence of friction in the middle and upper atmosphere. 22. From Table \( 8 \mathrm{~A}-2 \), the station that reported the fastest \( 500 \mathrm{mb} \) winds was This makes sense from an examination of Figure \( 8 \mathrm{~A}-5 \) and the close spacing of height contours in the region. a. Jackson b. Midland-Odessa c. Tucson 23. At upper levels, wind directions are also related to the contours. The faster upper-air winds are a. more "parallel" to the contours b. directed actoss the contours at large angles The absence of friction at upper levels results in flow controlled by the pressure gradient and Coriolis forces. Therefore, winds generally flow along the contours on upper-tir maps as opposed to the imward circulations within lows and outward within highs seen oa surfice maps. 24. Using the 500 -mb station values from Table \( 8 \mathrm{~A}-2 \), as well as the contour pattern in Figure \( 8 \mathrm{~A}-5 \), compare the heights at Jacisson, Midland-0dessa, and Tueson. The 500-mb height was lowest over a. Jackson b. Midland-Odessa c. Tucson