Weather and Weather Forecasting Current Weather Finish Chapter 6 Lifting Mechanisms Fronts and Wave Cyclones Weather Forecasting For Next Class: Read Chapter 8

Atmospheric Temperatures and Stability Figure 7.18

Stable vs. Unstable Air https://scied.ucar.edu/webweather/weather-ingredients/stable-unstable-air

Three Examples of Stability Figure 7.19

What is Rime Ice? 5

Rime Ice A coating of tiny, white, ice particles caused by the rapid freezing of supercooled water droplets on impact with an object.

Rime Ice on Mt. Mitchell 7

Rime Ice on Beech Mountain

Rime Icing on Grandfather Mountain

Heavy Rime Icing on Mt. Washington 10

Whiteman & Garibotti (2013), BAMS

Whiteman & Garibotti (2013), BAMS

Atmospheric Lifting Mechanisms What are the four mechanisms of atmospheric lifting?

Atmospheric Lifting Mechanisms Convergent Lifting   Convectional Lifting   Orographic Lifting   Frontal Lifting (Cold and Warm Fronts)  

Atmospheric Lifting Mechanisms Figure 8.6

Moisture Droplets Figure 7.20

Raindrop and Snowflake Formation Figure 7.21

Local Heating and Convection Figure 8.7

Orographic Precipitation Figure 8.9

Orographic Patterns Figure 8.10

NC Precipitation Where is the wettest place in North Carolina? Driest?

Driest Weather Station 37.32 inches (annual average) Asheville Driest Weather Station 37.32 inches (annual average) Lake Toxaway Wettest Weather Station 91.72 inches (annual avg.) EPA-NIEHS Climate Change Workshop, June 17, 2011

Average Annual Precipitation

Air Masses Figure 8.2 24

Lake-Effect Snowbelts Figure 8.5 25

25 Jan 2006 Radar 40+ cm in SE WV

Life Cycle of a Midlatitude Cyclone Cyclogenesis Open stage Occluded stage Occluded front Stationary front Dissolving stage Storm tracks 27

Midlatitude Cyclone Figure 8.14 28

Midlatitude Cyclone Figure 8.15 29

Midlatitude Cyclone Figure 8.15 30

Average and Actual Storm Tracks Figure 8.16 31

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Weather Forecasting Figure 8.17 48