A Fine-Scale Study of the 16 June 2009 Thunderstorm Event at Deseret Ranch
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A Fine-Scale Study of the 16 June 2009
Thunderstorm Event at Deseret
Ranch Max Goldfarb and Shannon
Ogle Florida Institute of Technology
Department of Marine and Environmental Sciences
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Compare model radar reflectivity patterns to observed radar images for Melbourne as well as model surface temperature
Analyze fine scale Temperature and Relative Humidity Data for June 16, 2009 at Deseret Ranch
Evaluate model forecasts and radar reflectivity to sensor data
Investigate possible heat burst activity and compare with past studies
Objectives:
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Atmospheric phenomena occur on many different spatial scales: from 1000 kilometers to 100 meters.
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Introduction
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Water Vapor Satellite Image
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CAPE
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North American Mesoscale Surface Temperature Model
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%oF
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ᵒF%
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Within the downdraft of a storm, circulations on different scales occur as well.
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Heat Burst Formation:
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• Past Studies (Johnson, 1976):* Temperature increase of 2.6oC*Soundings indicated warming and drying below 3 km (~700mb) *Occurred during dissipating stage of thunderstorm and in the evening
• Effects of Heat Bursts:
*Sudden increase of temperature with a thunderstorm*Associated with strong damaging winds*Sometimes falsely attributed to tornado damage*Possible danger to crops
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2D Model of a Downdraft
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Fine scale temperature network captured activity not resolvable by a mesoscale model
Because of the sparse distribution of data, heat bursts may occur more often in central Florida.
HOBO sensors can fill in the gaps in observing networks and capture important phenomena
Conclusion:
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AcknowledgementsSpecial Thanks to:
Dr. Chiao Dr. Johnson Dr. Lazarus Mr. SplittFlorida Tech DMES Students
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Johnson, B. “The Heat Burst of 29 May 1979”. Journal of Atmospheric Sciences. May 20, 1983
Michaelsen, Joel. Geology 110: Imtroductory Meteoorlogy lecture notes, Winter 2008. http://www.geog.ucsb.edu/~joel/g110_w08/lecture_notes/ Checked 7/20/2009.
References:
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Questions?
Next:Erin Binder and Clemens Grohs