?
Severe thunderstorm warnings issued by the National Weather Service. Color: Yellow
NWS SVR TSTM Warning (Yellow)
?
Tornado warnings issued by the National Weather Service. Color: Red
NWS Tornado Warning (Pink)
AI Products
?
Indicates storms that have identified by the AI system. Also includes a colored bar. When the color bar reaches a value ~1, then the warning system is close to the warning thresholds (but does not necessarily mean a warning will be issued) Color: No Color
AI IDd Storms (Circles)
?
Storm tracks. Essentially showing where a polygon would be drawn if a warning were issued. Color: Blue
AI Storm Tracks (Blue)
?
Generally the earliest warning issued as it has a very high false alarm rate, but gets a lot of tornadoes. Color: Green
AI Warning 1 (Green)
?
AI System with the highest POD and a reasonable false alarm rate. Color: Yellow
AI Warning 2 (Yellow)
?
Another fairly high POD system. Does tend to issue a few too many false alarms at longer lead times (15-25 minutes). Color: Orange
AI Warning 3 (Orange)
?
Similar to AI system 3, but attempts to fix some of the false alarm issues by increasing the threshold warning thresholds for warnings beyond 15 minutes. Color: Red
AI Warning 4 (Red)
?
Slightly lower POD than above, but a better false alarm rate. Color: Magenta
AI Warning 5 (Magenta)
?
Slightly lower POD than above, but a better false alarm rate. Color: Black
AI Warning 6 (Grey)
?
An older system. Should have PODs slightly lower than above, and similar false alarm rates. Color: Brown
AI Warning 7 (Brown)
?
Only warns about 20-30% of tornadoes and have similar if not slightly better false alarm statistics than 2-4, but has a very large LTA. Color: Black
AI Warning 8 (Black)
?
OLD. WILL BE REMOVED. From test 28. Only issues 10 minute warnings, should be used in combination with warning 3. This sytem beat NWS performance in SE with regard to POD10 and False alarm rates. Color: Blue
AI Warning 9 (Blue)
?
OLD. WILL BE REMOVED. From test 45. Only issues 10 minute warnings, should be used in combination with warning 2. Color: Green