Operational Model Forecasts
GLOBAL ENVIRONMENTAL MULTISCALE (GEM)
Severe Weather Charts
Specialized GEM model output is often used to help with the forecasting of severe weather. Since the factors most likely to indicate severe weather vary with the seasons, the charts are divided in broad categories of "Summer" and "Winter".
| Wind1 | Stability and Moisture2 | Energy, wind shear and helicity3 | ||||
|---|---|---|---|---|---|---|
| Hr | 00z Run | 12z Run | 00z Run | 12z Run | 00z Run | 12z Run |
| 00 | 323 (1:2) | 323 (1:2) | 323 (1:2) | 323 (1:2) | 323 (1:2) | 323 (1:2) |
| 03 | 323 (1:2) | |||||
| 06 | 323 (1:2) | 323 (1:2) | ||||
| 09 | 323 (1:2) | 323 (1:2) | ||||
| 12 | 323 (1:2) | 323 (1:2) | 323 (1:2) | 323 (1:2) | ||
| 15 | 323 (1:2) | 323 (1:2) | ||||
| 18 | 323 (1:2) | 323 (1:2) | 323 (1:2) | 323 (1:2) | ||
| 21 | 323 (1:2) | |||||
| 24 | 323 (1:2) | 323 (1:2) | ||||
- Wind, Tropopause and 250 hPa heights
- Stability indices, Dewpoints, Water Content
- Buoyant energy, Helicity, Storm Severity Index
00z Production Run (Normally updated between 5:00 and 6:00 UTC), 12z Production Run (Normally updated between 17:00 and 18:00 UTC)
| Pressure, thicknesses, precipitation types | 250 hPa, wind, moisture | |||
|---|---|---|---|---|
| Hr | 00z Run | 12z Run | 00z Run | 12z Run |
| 12 | 265 (1:2) | 272 (1:2) | 276 (1:2) | 276 (1:2) |
| 18 | 261 (1:2) | 269 (1:2) | 274 (1:2) | 274 (1:2) |
| 24 | 260 (1:2) | 262 (1:2) | 270 (1:2) | 270 (1:2) |
| 30 | 260 (1:2) | 259 (1:2) | 269 (1:2) | 269 (1:2) |
| 36 | 261 (1:2) | 258 (1:2) | ||
| 42 | 260 (1:2) | 258 (1:2) | ||
| 48 | 258 (1:2) | 256 (1:2) | ||
| xxxk = full size image (1:2) = image scaled by 1/2 | ||||
Created: 2002-12-31
Modified: 2004-07-13
Reviewed: 2002-12-31
URL of this page: http://www.weatheroffice.ec.gc.ca/model_forecast/severe_weather_e.html
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Environment Canada's World Wide Web Site.
