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Weather Verification in Utah: Synoptic Scenario and Snow Events

Follow "The Doctor" as he explains the significance of geography in predicting weather events in Utah using UCAR archived radars. Learn about snow verification methods and the importance of understanding topography. Discover important lessons in weather forecasting and verification processes.

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Weather Verification in Utah: Synoptic Scenario and Snow Events

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  1. Utah Verification Matt “The Doctor” Ray Jeremy “Vincent” Geiger Kyle “Mr. Brandt” Borchert Supervised by: Fred “The Ewall” Gadomski

  2. Synoptic Scenario (Nice Sound Bite Using Alliteration) 18z 3z 12z

  3. 12z GFS, as told by “The Doctor”

  4. UCAR Archived Radars

  5. UCAR Archived Radars

  6. The Importance of Geography • It doesn’t take much for mountains to get 12”+ snow events Wasatch Range/Uinta Mountains

  7. Zones By Topography

  8. Categories “Ruled Out” • Freezing Rain/Drizzle (9) ; Sleet (10) ; Icestorm (11) ; Blowing Dust (14) ; Smoke (16) ; Extreme Chill (19) ; Nuisance Flood (21) ; Flash Flood (22) ; Stream Flood (23) ; River Flood (24) ; Thunderstorm (26) ; Severe Thunderstorm (27)

  9. The Snow Verification Mess • No CoCoRaHS… • Joe and Sally live in valleys… • Left to look at random ski resorts, SNOTEL, and few Mesonetobs • Speaking of SNOTEL…

  10. “Flurries” Verification • Zones: 1-4, 6-12, 14-16, 517, 518, 23, 24

  11. “Snow Shower” Verification • Zones: 3, 4, 6-11, 14-16, 517, 518, 23

  12. “Light Snow” Verification • Zones: 6-10, 14-16, 517, 518, 23

  13. “Moderate Snow” Verification • Zones: 6-10, 14, 15, 517, 518

  14. “Heavy Snow” Verification • Zones: 7, 8, 10

  15. “Very Heavy Snow” Verification • Zones: 7, 8

  16. Newly “Ruled Outs” • Snow Squall (3), Blizzard (8), Severe Winds (13), Blowing/Drifting Snow (15)

  17. “High Winds” Verification • Zones: 14, 16, 517, 19, 21, 22, 25, 28, 29

  18. “Dense Fog” Verification • Zones: 6-9, 12, 16, 518, 24

  19. “Wind Chill” Verification • Zone: 9

  20. “Freeze/Frost” Verification • Zones: 1-16, 517, 518, 20, 23-29

  21. “Lightning” Verification • Zones: 518, 25, 29

  22. “0.25 Inches Or Greater Liquid Equivalent” Verification • Zones: 3, 6-10, 13-16, 517, 518, 27, 28

  23. “Temperatures 50F or Greater” Verification • Zones: 3, 4, 10, 13-16, 518, 19-22, 25, 27, 29

  24. Lessons Learned • Behind a cold front, there can be a “lag” in gusty winds • Four lows in the four corners! • The same storm system that brought mountains over a foot of snow, can bring nothing to places like the salt flats • Geography is REALLY important • Dense fog is difficult to verify given lack of obs.

  25. A Question For “Ewall” Himself • Did somebody say “Cocktail Party Trivia?” Next Slide…

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