Weather Glossary



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Pacific Decadal Oscillation (PDO) a recently described pattern of climate variation similar to ENSO though on a timescale of ...
Polar Jet Marked by a concentration of isotherms and strong vertical shear, this jet is the boundary ...
POP Probability of Precipitation ...
Popcorn Convection Slang for showers and thunderstorms that form on a scattered basis with little or no ...
Positive-tilt Trough An upper level system which is tilted to the east with increasing latitude (i.e., from ...
Potential Vorticity This plays an important role in the generation of vorticity in cyclogenesis, especially along the ...
Pressure Gradient The amount of pressure change occurring over a given distance. ...
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City Weather

Toronto
Light Rain 3°C
Halifax
Scattered Snow Showers -1°C
Quebec
Partly Cloudy -2°C
Ottawa
Mostly Cloudy -3°C
Montreal
Areas of Fog -4°C
Winnipeg
Partly Cloudy -2°C
Calgary
Partly Cloudy 5°C
Yellowknife
Mostly Clear N/A
Saskatoon
Cloudy 2°C
Vancouver
Light Rain 7°C

Last Update: 6:00 AM Mar 25 2017