Download - SAAWSO HIGH IMPACT WEATHER EVENTS
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SAAWSO HIGH IMPACT WEATHER EVENTS
Ismail GultepeEC, Cloud Physics and Severe Weather Research
SectionToronto, Ontario M3H 5T4, Canada
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OBJECTIVES• EMPHASIZE HIGH IMPACT WEATHER
EVENTS• -SURFACE OBSERVATIONS• -REMOTE SENSING OBSERVATIONS• -FORECAST MODELS• -INTEGRATED DATA
• FOCUS ON SATELLITE BASED ALGORITHMS AND NOWCASTING
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HIGH IMPACT WEATHER EVENTS• LOW VISIBILITY AND CEILING• HEAVY SNOW• FREEZING FOG, DRZ, AND RAIN• HEAVY RAIN AND DRIZZLE• STRONG GUST AND WIND SHEAR• SNOW SQUALLS
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ANALYSIS ISSUES
• MEASUREMENT UNCERTAINTY-CALIBRATION -INSTRUMENT RESPONSE -THRESHOLDS
• ANALYSIS UNCERTAINTY
• TIME AND SPACE VARIABILITY
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MAP FOR THE PROJECT REGION
BAY BULLS
FLATROCK
HOLYROOD ST. JOHN’S
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IMPORTANT CASES FOR HIGH IMPACT WEATHER EVENTS
• Jan 10 [heavy snow: >50 cm/day]• Jan 17/18 [heavy snow, riming, splint.]• Jan 22 [heavy snow]• Jan23-26 [snow squalls/blowing snow]• Jan 31 [gust/IP/RN]• Feb 2 [heavy snow]• Feb 4[fog/DRZ]• Feb 20-22 [Icing event]• April 6 [heavy RN]• April 19 [wet snow, IP, rain, drizzle]
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WINTER SNOW STORM• MORE THAN 50 CM SNOW/DAY• 60% (350000 PEOPLE) DID NOT
HAVE ELECTRICITY• 4-7 DAYS NO ELECTRICITY• ALL THE FLIGHTS CANCELLED
DURING STORM
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JAN 10 SNOW STORM
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RADAR IMAGES
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GOES IMAGES
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JAN 10 2013-SNOW STORM
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JAN-10/11 SNOW STORM
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GCIP PARTICLE SHAPES
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LPM MEASUREMENTSPWD MEASUREMENTS
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January 10
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WIND 3DApril 6
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April 6
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Jan 22 heavy snow case
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JAN 17-NEEDLES-SPLINTERING
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JAN 17-heavy riming
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Particle shape
discrimination
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JANUARY 24 SNOW SQUALLS
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Jan24-LPM SNOW PR
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JAN. 18riming
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FEBRUARY 2 SNOW PELLETS
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FEB. 4 FOG/DRZ
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Feb.4 -CL51 Ceilometer
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FEB. 4-5
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APRIL 6-VIS HEAVY RAIN
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APRIL 19 WET SNOW-DRZ CASE• 7 RADIOSONDES WERE RELEASED:• [0845;1100;1300;1530;1730;2045 LST]
• WETSNOW-IP-RAIN-DRIZZLE FROM 11AM TO 7 PM
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APRIL 19
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FUTURE WORK• Snow type prediction using LPM
• Improve Fog/precipitation Vis parameterizations
• Develop algorithms for satellite retrievals of cold cloud microphysics
• Include new scanning Doppler Lidar and UAV platforms for winter project