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