1. SAAWSO HIGH IMPACT WEATHER EVENTS Ismail Gultepe EC, Cloud Physics and Severe Weather Research Section Toronto, Ontario M3H 5T4, Canada

2. OBJECTIVES EMPHASIZE HIGH IMPACT WEATHER EVENTS -SURFACE OBSERVATIONS -REMOTE SENSING OBSERVATIONS -FORECAST MODELS -INTEGRATED DATA FOCUS ON SATELLITE BASED ALGORITHMS AND NOWCASTING

3. 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

4. ANALYSIS ISSUES MEASUREMENT UNCERTAINTY -CALIBRATION -INSTRUMENT RESPONSE -THRESHOLDS ANALYSIS UNCERTAINTY TIME AND SPACE VARIABILITY

5. MAP FOR THE PROJECT REGION BAY BULLS FLATROCK HOLYROOD ST. JOHN’S

6. 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]

7. 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

8. JAN 10 SNOW STORM

9. RADAR IMAGES

10. GOES IMAGES

11. JAN 10 2013-SNOW STORM

12. JAN-10/11 SNOW STORM

14. GCIP PARTICLE SHAPES

15. LPM MEASUREMENTS PWD MEASUREMENTS

16. January 10

17. WIND 3D April 6

19. April 6

20. Jan 22 heavy snow case

21. JAN 17-NEEDLES-SPLINTERING

22. JAN 17-heavy riming

23. Particle shape discrimination

24. JANUARY 24 SNOW SQUALLS

25. Jan24-LPM SNOW PR

26. JAN. 18 riming

28. FEBRUARY 2 SNOW PELLETS

29. FEB. 4 FOG/DRZ

30. Feb.4 -CL51 Ceilometer

31. FEB. 4-5

32. APRIL 6-VIS HEAVY RAIN

34. 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

35. APRIL 19

36. 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