Tropical Streamline Analysis
Terms
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- Streamlines DO NOT connect points of equal wind direction. Streamlines are drawn ____ ____ to the reported wind direction.
- Roughly parallel
-
When drawing a streamline which guideline do you keep in mind?
A. Arrowheads are placed at the beginning & ending of each streamline.
B. Streamlinesbegin & end at the edges of the chart or at singular points.
C. Streamlines never c - D. All the Above
- The tropical streamline analysis consists of 2 sets of lines which can be used to determine wind ____ & ___ at any point on the chart.
-
speed
direction - A tropical streamline analysis consist of two sets of lines. They are called ___ & ___ which represents wind direction & ___.
-
Streamlines
Isotachs
speed - The primary reason for constructing a tropical streamline analysis is due to weak horizontal gradients of ___&___.
-
pressure
temperature - The axis of the diverging or converging flow is depicted by drawing a special streamline known as___?
- Asymptote
- Streamlines should parallel wind reports. However, an exception to this rule is when wind speeds are less than __ kts. at the gradient level, or less than ___kts. at the upper levels.
-
5kts
10kts - On a tropical streamline what do the dashed green lines depict?
- Isotachs
- Placed at the beginning and eding of each streamline?
- Arrowheads
- a chart which depicts a continious representation of a horizontal wind field is?
- Tropical streamline Analysis
- Points on the chart into which more than one streamline can be drawn or about which streamlines form a closed curve are called?
- Singular Points
- What are the 4 types of singular points?
-
1. Cyclonic circulation Cyclone
2. Anticyclonic
3. Neutal points
4. Cusp -
What is a transition area between 2 like singualr points or circulaion patterns or between westerly and easterly flow?
A. cyclonic circulation center
B. Asymptotes
C. Nuetral Point
d. Cusp - C. Nuetral Point
-
What is an intermediate pattern in the transition phase between a wave & a circulation center?
A. cyclonic circulation center
B. Asymptotes
C. Nuetral Point
d. Cusp - D. Cusp
- What are the 3 major features that are found on a tropical streamline analysis?
-
1. Singular Pt.
2. Asymptotes
3. Waves - TROPICAL WAVE: The gradient wind pattern ahead of the wave is more___ & the pattern behind the wave is more___?
-
1. NE-NNE
2. SE-SSE - Asymptotes are defines as special streamlines which depict the axes within a region of major____ or ____.
-
Convergence
Divergence - What color are converging Asymptotes depicted?
- RED
- What color are diverging Asymptotes depicted?
- BLUE
- ___ is known as an oscillation in the stream line pattern?
- Wave
- Remember a singular point is a point on the chart into which more than one streamline can be drawn or about which streamlines form a close curve. It is best to begin the search along the axis of the subtropical ridge line between the latitudes of ___ &am
- 20N - 35N
- When searching for singular points it is best to begin along the ___ of the ____ ____.
-
Axis
Subtropical Ridge - At the center of a singular point the wind speed is ___ kts?
- 0kts
- For analyzing an ANTICYCLONE a minimum of 2 ____ asymptotes will denote a center labeled with a small ___ A.
-
Diverging
Blue - For analyzing an CYCLONE a minimum of 2 ____ asymptotes will denote a center labeled with a small ___ c.
-
Converging
red -
Which is a transition area between 2 like singular points (cyclones or Anti-Cy.) or circulation patterns or between westerly & easterly flow?
A. Neutral Point
B. CUSP
C. Wave
D. Asymptote - A. Neutral Point
- A type of singualr point that exist between 2 anti-cyclones is called?
- Neutral point
- On a gradient level analysis, most of the area around the neutral point should be drawn with a ___kts isotach, & ___kts on the upper level chart?
-
5kts
10kts - A minimum of 2 diverging asymptotes will denote a?
- Anti-cyclone
- A tropical WAVE has both ___ & ___ curvatures. A wave is best described as a perturbation which shows up as ___ in the streamline pattern?
-
Anti-cyclonic
cyclonic
curve -
When drawing isotachs, the interval between speeds of 5 & 20kts is ___kts.
Between 20 & 60kts or greater, the intervals is ___kts. -
5kts
10kts - Areas of 30kts will be shaded in ___ and labeled ___?
-
Purple
MAX - Areas with 10kts of wind speed or less will be shaded in ___ and labeled ___?
-
yellow
MIN - When drawing asymptotes, red streamlines can/cannot (circle one) flow into blue streamlines?
- cannot