Science Homework Help

I. NOAA Weather Maps: August 15, 2017

1. Look at the 8/15/17 Surface Weather Map (SWM). What are Duluth’s temperature, dewpoint & pressure readings? Is fog occurring? Why or why not?

2. Notice the stationary front across southern Iowa on the Surface Weather Map. Compare the Dewpoints of Springfield, IL, & St Louis Mo to those north of the front in (a) Moline, IL, (b) La Crosse, WI and (c) Minneapolis-St Paul (MSP). What are these dewpoint readings?

3. Describe what you would “feel” north of the front vs south of the frontal boundary in question 2.

4. Examine the High/Low Temperature Map for 8/15/17, Notice the hi/lo temp spread at MSP is 17°F whereas in Little Rock, Ark. has only a 4°F spread. Why? (Hint: need to think of why the temperature barely drops at night)

5. How does the 500 mb Level Map explain the mild temperatures from upstate NY to Caribou Maine? (Look to where the upper level flow originates)

II. NOAA Weather Maps: October 16, 2017

6. Go to the 500 mb Chart. Each isoline depicts a change in altitude of ____ meters. What is the wind velocity over southern Minnesota? What is the 500 mb height over southern Minnesota?

7. How does the height in southern MN compere to that of (a) NE MN (along the Canadian border) and (b) the Texas panhandle? What is the velocity over the TX panhandle?

8. Look at the Surface weather Map for 10/16/17. What is the dewpoint at Key West, Fl and MSP? Looking at the 500 mb Map, how does it to explain the drastic difference in dewpoints between Key West Fl and MSP?

III. NOAA Weather Maps: September 22, 2019

9. Eureka, CA on the 9/22/19 Surface Weather Map has calm conditions, but 100% cloudy skies and limited visibility? What is the temp and dewpoint along with the visibility?

10. You are at the Eureka airport (ACV) located at 222 feet above sea level, how high is the LCL above the runway? What is the altitude of the LCL?

11. Suppose you know someone with sensitive skin, especially relative to dry conditions. Would you that advise he/she avoid Nevada and most of AZ on 9/22/19? Looking for a Tdew < 36°F on the Surface Weather Map. Why is this region so dry?

12. Where in AZ would advise this friend to go and what is the dewpoint at that location? What is the source of moisture?

13. Look at the High/Low Map for 9/22. The temperatures over the past 24 hours for Michigan’s lower peninsula are quite warm and very mild at night. What are these temperatures? How does the 500 mb chart explain this warm day and very mild night

Part III NOAA Weather Maps 2/12/21 & 2/13/21 https://www.wpc.ncep.noaa.gov/dailywxmap/pdffiles….

• Locate International Falls, MN , Duluth MN and MSP. Use 2/12/21 weather map.
• Look at the 500 mb chart and notice the 500 mb heights are low over Minnesota. Why is this?
• From what direction are the 500 mb winds blowing and what is their velocity?
• Look at the high low map on 2/13/21: Notice the temps in Mn and Iowa. Do these make sense given the Surface Weather Map and 500 mb chart?If yes, then explain.
• Notice the high/low temps at three stations located in Oklahoma and northern Arkansas.What are these high/lows as shown on the 2/12/21 map?These temperatures are still cold, but not as brutal as those in MN.The 500 mb flow over Okla. and Ark. On 2/12/21 is from the (a) east (b) west (c) south (d) north on 2/12/21.How does it change on 2/13/21 and what did that do the hi/lo temps in OK and Ark?
• Now look at the surface weather map for 2/12/21.What is the wind direction at these three stations?Velocity?How does this compare with the 500 mb flow?Would you say that cold dense air from Canada the surface is undercutting milder Pacific air at 500 mb?
• Examine the surface weather map for 2/13/21.What is the air pressure at International Falls, MN?What were the 24 hr hi/lo temps?Look at the 500 mb chart, how does it differ from the 500 mb chart on 2/12?Does that difference explain the colder temps at International Falls on 2/13/21?

air pressurewind directionwind velocity dewpoint

International Falls

Duluth

MSP

The surface air pressure is best described as (a) quite high(b) neutral(c) low

Observation: Examine the maps.If surface winds are from one direction and 500 mb flow from another then we have a situation that features wind shear.Notice on the 24-hr. precipitation that at Junction City TX had 3.31 inches of precipitation.Given that the temps were below freezing, freezing rain occurred (discuss this phenomenon later in class), which caused an immense amount of damage, as tree branches broke-off and power lines crashed to the ground, because of the accumulated weight of the ice.Such an ice storm is unprecedented in this part of Texas.