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SAAWSO HIGH IMPACT WEATHER EVENTS. Ismail Gultepe EC, Cloud Physics and Severe Weather Research Section Toronto, Ontario M3H 5T4, Canada. OBJECTIVES. EMPHASIZE HIGH IMPACT WEATHER EVENTS -SURFACE OBSERVATIONS -REMOTE SENSING OBSERVATIONS -FORECAST MODELS -INTEGRATED DATA - PowerPoint PPT Presentation
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SAAWSO HIGH IMPACT WEATHER EVENTS
Ismail GultepeEC, Cloud Physics and Severe Weather Research
SectionToronto, Ontario M3H 5T4, Canada
OBJECTIVES• EMPHASIZE HIGH IMPACT WEATHER
EVENTS• -SURFACE OBSERVATIONS• -REMOTE SENSING OBSERVATIONS• -FORECAST MODELS• -INTEGRATED DATA
• FOCUS ON SATELLITE BASED ALGORITHMS AND NOWCASTING
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
ANALYSIS ISSUES
• MEASUREMENT UNCERTAINTY-CALIBRATION -INSTRUMENT RESPONSE -THRESHOLDS
• ANALYSIS UNCERTAINTY
• TIME AND SPACE VARIABILITY
MAP FOR THE PROJECT REGION
BAY BULLS
FLATROCK
HOLYROOD ST. JOHN’S
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]
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
JAN 10 SNOW STORM
RADAR IMAGES
GOES IMAGES
JAN 10 2013-SNOW STORM
JAN-10/11 SNOW STORM
GCIP PARTICLE SHAPES
LPM MEASUREMENTSPWD MEASUREMENTS
January 10
WIND 3DApril 6
April 6
Jan 22 heavy snow case
JAN 17-NEEDLES-SPLINTERING
JAN 17-heavy riming
Particle shape
discrimination
JANUARY 24 SNOW SQUALLS
Jan24-LPM SNOW PR
JAN. 18riming
FEBRUARY 2 SNOW PELLETS
FEB. 4 FOG/DRZ
Feb.4 -CL51 Ceilometer
FEB. 4-5
APRIL 6-VIS HEAVY RAIN
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
APRIL 19
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