Lab 5

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Lab 5

• More Stability Analysis and Soundings

Presented by Pete Stamus Tues Wed, 9 10 May
2000 Hydromet 00-3
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Lab 5 More Stability Analysis and Soundings

• Provided
• 1. 1200 UTC 13 March 1993 soundings for Hatteras
  NC, Dulles VA, Athens GA, Albany NY
• 2. 0000 UTC 14 March 1993 soundings for Dulles
  VA, Atlantic City NJ, Albany NY
• 3. 0000 UTC 14 March 1993 850 mb plots
• 4. 0000 UTC 14 March 1993 MSL pressure and
  surface plots
• 5. 0000 UTC 14 March 1993 500 mb heights and
  vorticity
• Action
• 1. Where is the above freezing layer at Athens
  GA? What physical process might have caused
  this?
• 2. What is the origin of the air feeding the
  heavy snow in Pennsylvania and
• New York?
• 3. What is the temperature change at Albany NY
  between the surface and 300 mb at 1200 UTC 13
  March 1993?
• 4. Same as question 3, but for 0000 UTC 14 March
  1993.
• 5. What is the temperature change at Albany NY
  between 700 and 300 mb at
• 1200 UTC 13 March 1993?
• 6. Same as question 5, but for 0000 UTC 14 March
  1993.

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Lab 5 More Stability Analysis and Soundings
(cont.)

• Discussion
• a. Can you explain why the heaviest snow is
  often near the rain/snow line?
• b. Why was there thundersnow at Albany NY?

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13 Mar 1993 1200 UTC Hatteras NC
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13 Mar 1993 1200 UTC Hatteras NC
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13 Mar 1993 1200 UTC Athens GA
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13 Mar 1993 1200 UTC Athens GA
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13 Mar 1993 1200 UTC Dulles VA
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13 Mar 1993 1200 UTC Dulles VA
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13 Mar 1993 1200 UTC Albany NY
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13 Mar 1993 1200 UTC Albany NY
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14 Mar 1993 0000 UTC Dulles VA
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14 Mar 1993 0000 UTC Dulles VA
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14 Mar 1993 0000 UTC Atlantic City NJ
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14 Mar 1993 0000 UTC Atlantic City NJ
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14 Mar 1993 0000 UTC Albany NY
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14 Mar 1993 0000 UTC Albany NY
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14 Mar 1993 0000 UTC 850 mb plot
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14 Mar 1993 0000 UTC 850 mb plot
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14 Mar 1993 0000 UTC
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14 Mar 1993 0000 UTC
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14 Mar 1993 0000 UTC MSL pressure (mb)
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14 Mar 1993 0000 UTC 500 mb Height
(m) Vorticity (s-1)