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Atmospheric Favorability for Severe Weather
| Current Radar Loop |
NAM12 Threat Image |
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| Mouseover other forecast hours in the images below for NAM12 AFS Threats |
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The Atmospheric Favorability for Severe Weather (AFS) are based on model
data (RUC13, WRFnmm, WRFarw, NAM12), showing the areas most and least
favorable to support strong thunderstorm development. AFS are color-coded
according to the threats areas: None(Gray), Low(Yellow), Medium(Orange),
High(Red), and Extreme(Purple). The hourly AFS images are derived from
two techniques: from the Supercell Composite Parameter, and from the
juxtaposition of Boundary Layer Convergence (BLC) and CAPE.
Image Creation Time: 04:35 PM EDT SUN MAY 19 2013
AFS Grids created using the following parameters:
Models Included: |
WRFNMM WRFARW RUC13 NAM12 |
Model Scheme: |
COMPOSITE |
Significant Severe Storm Formula: |
SUPERCELL COMPOSITE PARAMETER (SPC) |
Cape: |
SFC-BASED |
Wind Convergeance: |
BOUNDARY LAYER |
Dynamic Forcing: |
NONE |
Potential Vorticity: |
NONE |
Inhibitors: |
NONE |
Cape Threshold: |
1000 |
LCL Threshold: |
800 |
High Threat Threshold: |
2 |
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