PLEASE HELP with all questions. Need Help! Thank you 1. At Figure 1 map time, th
ID: 116281 • Letter: P
Question
PLEASE HELP with all questions. Need Help! Thank you
1. At Figure 1 map time, the anticyclone (high-pressure) center stretched across the much of the U.S. with one center of higher pressure located in Oklahoma. Another center existed in Idaho. The general wind circulation about the Oklahoma high-pressure center marked by the innermost, 1028-mb isobar, as suggested by the hand-twist model and consistent with wind arrows in the several-state region on Figure 1, was ________.
[ ] clockwise and inward
[ ] clockwise and outward
[ ] counterclockwise and inward
[ ] counterclockwise and outward
2. The Raleigh-Durham National Weather Service (NWS) forecast office is located in central North Carolina. At Figure 1 map time the high-pressure system was beginning to influence local weather conditions. The bold line with blue triangles to the southeast of Raleigh-Durham, and extending roughly parallel to the East Coast, is marked as a(n) ________ front.
[ ] warm
[ ] cold
[ ] stationary
[ ] occluded
3. The wind reported at Raleigh-Durham was about 15 knots (one long feather; one shorter one) generally from the ________.
[ ] north
[ ] west
[ ] south
[ ] east
4. Radar shadings along and to the west of the frontal boundary from New England to the Carolinas ________ show that precipitation was scattered to the east and south of the Raleigh-Durham area.
[ ] did
[ ] did not
Figure 2a is the Raleigh-Durham, NC, National Weather Service (KRAX) Doppler radar display of the Base Reflectivity. Figure 2b displays the Base Velocity at 2032Z on 16 OCT 2017, within about an hour and a half of Figure 1 map time. The location of both Raleigh and Durham cities are denoted by white crosses (+) near their names on both figures. The actual center of the radar site is marked on the figure with a black star on both figures.
The white boundary line of the Virginia-North Carolina border runs east-west to the north of Raleigh-Durham. The white line of the southern border (with South Carolina) runs east-west, but diverts southeast toward the lower right-hand corner of the map. North is to the top on both map views.
5. The reflectivity as seen in Figure 2a is related to the intensity of the radar return signal, and hence the rainfall rates, according to the scale along the right margin of the reflectivity display. The yellow and red shadings southeast of the radar site in the reflectivity view were returns from moderate rates of precipitation embedded in the area of generally lighter precipitation denoted by green and blue returns. The precipitation echoes shown by the shadings in the reflectivity display ________ generally cover more of the immediate area surrounding Raleigh-Durham radar site than locations east and south.
[ ] did
[ ] did not
The reflected energy from rain, snow and other particles in the atmosphere can also be used to determine particle motions. The Doppler Base (Radial) Velocity display (Figure 2a) is interpreted using the scale to its lower right. Negative numbers/green hues indicate winds (with imbedded particles) with radial components toward the radar site. Positive numbers/red hues denote radial components of the wind away from the radar. The radial velocity color scale further shows magnitudes of the radial velocity in knots. The purple shade that sometimes appears imbedded in red and green shades represents where the radar cannot distinguish whether the motions are uniquely toward or away from the radar.
6. The green and red radial velocity shadings and the purple areas in Figure 2b ________ generally cover the same areas shaded in the reflectivity return display depicted in Figure 2a.
[ ] do
[ ] do not
In the Base Velocity view (Figure 2b), the gray boundary curve between light reddish-gray and light greenish-gray shadings oriented generally west-northwest/east-southeast through the radar site indicates 0 radial “Doppler wind speed.”
7. In the radial velocity display, the area of greatest radial wind components flowing away from the radar site (brighter red shading) is located generally to the ________ of the radar site.
[ ] north and west
[ ] north and east
[ ] south and east
8. In the radial velocity display, the area of radial wind components flowing toward the radar site (brighter green shading) is located generally to the ________ of the radar site.
[ ] west
[ ] north
[ ] east
[ ] south
9. Imagine or draw a straight line about 3 cm in length along the gray 0-Doppler wind speed boundary, centered on the radar site. This “zero-speed” situation occurs where the radar beam is generally ________ to the actual wind flow and there is no wind motion component directly towards or away from the radar.
[ ] perpendicular
[ ] parallel
10. Imagine or draw another straight-line perpendicular to your 0-Doppler wind speed boundary line through the Raleigh-Durham radar site. Imagine or draw an arrowhead on the end of the line just imagined or drew in the red area to indicate the Doppler-detected wind direction at the station. The direction of your arrow, signifying the wind direction in the lower layers of the atmosphere sensed by the radar signal, is generally from the ________.
[ ] north
[ ] west
[ ] south
[ ] east
11. The Figure 1 station model for Raleigh-Durham showed the plotted surface wind (Item #3) as generally from the ________.
[ ] north
[ ] west
[ ] south
[ ] east
12. The surface wind direction from the Raleigh-Durham station model (Figure 1), was ________ the arrow you drew or imagined on the radial Velocity display of Figure 2b indicating the low-level wind direction.
[ ] generally consistent with
[ ] in the opposite direction from
As the radar beam pulses travel outward from the radar site, the beam curves downward due to refraction, but with less curvature than the underlying Earth’s surface. Therefore, the beam is sampling air at increasing altitudes as distance away from the radar site increases in any direction. Shading patterns therefore give information on wind speeds and directions at higher and higher altitudes.
13. The greatest wind speeds as evidenced by the Figure 2b Base Velocity speed shading scale were ________ the reported surface wind speed.
[ ] less than
[ ] the same as
[ ] greater than
DS-CWS 7B - 2 - FL17 Fronts at 152 1916 OCT 2017 Isobors, Fronts, Radar & Doto 000 101 O081 34 Sy 45 1214 179 fo 286 62205 57 226 @ 53 O 18 45 56 10 246 67245 76 ya 266 266 2795 6. DBz 7 73 68 49 43 OY20 B41RE) 8 26 73 O 102 42 101 43 22 238 6. 36 1 34 32 1012 28 74 249 42 75 230 87 57 75 ND NCEP/NWS/NOAA NATIONAL 2 KM BASE REFLECT 0.00 DEG Blue - Isobars (4 mb) Figure 1. - Analyzed NCEP weather map with Isobars, Radar & Data for 19Z 16 October 2017. Fronts were analyzed four hours prior to other data.Explanation / Answer
1. Clockwise and Inward.
2.Cold front
3.north
4.did
5.did
6.do
7.north and east
8. north
9.perpendicular
10.north
11. north
12.generally consistent with
13.greater than
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