ENSC 408: Lab 6 Radar Imagery Interpretation October 22 nd , 2019 - - PowerPoint PPT Presentation

▶

Aug 19, 2023 493 likes •577 views

ENSC 408: Lab 6 Radar Imagery Interpretation October 22 nd , 2019 Lab 4 Marks General Comments: 1. Thermal wind (2d) can be calculated by comparing the vector length with the radial axis of the hodograph Differencing the wind speeds does

SLIDE 1

ENSC 408: Lab 6

Radar Imagery Interpretation October 22nd, 2019

SLIDE 2

Lab 4 Marks

General Comments: 1. Thermal wind (2d) can be calculated by comparing the vector length with the radial axis of the hodograph

Differencing the wind speeds does not consider directional shear

2. For inactive/active front (2i) you only compare the wind component in the direction of the front (a strong easterly wind won’t move a W-E oriented front) 3. Unstable air direction determination (2k)

Draw example on board

4. Make sure to convert wind shear to comparable units (2n). Cannot compare knots/feet with s-1

SLIDE 3

Weather Forecasting Results

Average Score: 5 / 10 Low Temp. (C) High Temp. (C) Precipitation (no/yes/type) Observed 3 14 Forecasted 6 13 1 Class Average 4 12 1 Class 5 12 5 14 1 3 12 1 4 12 1 4 12 1 4 12 1 4 12 1 6 13 1

SLIDE 4

Weather Discussion

Today @ 10 am

Presenters: Mabel & Aaron

Next Week

Presenters: Andy & Adele

Presentation Date Past Wx Current/Future Wx Sep 24 Selina Mabel Oct 1 Adele Selina Oct 8*

Oct 15

Aaron Andy Oct 22 Mabel Aaron Oct 29 Andy Adele

SLIDE 5

Objective:

Learn how to interpret Doppler

radar images Materials:

A sequence of Doppler radar

images of a severe thunderstorm outbreak that

ccurred in the midwestern

U.S. (near St. Louis, Missouri) in May of 2003.

Another sequence of Doppler

radar images of the winter storm that affected the Prince George area on 26-27 February 2006.

Radar Imagery Interpretation

SLIDE 6

R = cR100.0625dBZ cR = 0.036 mm h-1 dBZ = 10log(Z) How would we determine the intensity, Z, given dBZ? Storm tracking!

Midwest CAPPI Images

SLIDE 7

Average precip. Rates from radar Compare with airport

bservation data

Storm tracking, persistent echoes, possible errors, resolution, rain vs snow, and more!

Prince George CAPPI Images

Date/Time (UTC) Average Precipitation Rate (cm/hr)

2006-02-27 18:50 2.5 2006-02-27 19:00 2.6 2006-02-27 19:10 1.2 …. …. 2006-02-27 22:20 2.0

SLIDE 8

Assignment

This lab assignment is due at the start of next week’s lab (October 29th at 8:30 am) It is worth 5% of the final course grade There are two main parts:

the first with 5 questions to answer
the second with 10 questions (+1 bonus!)