Time for a bit of practical.
(Yea; I know you would much rather do the more interesting stuff but we can't manage with just plain theory all the time.) …
The USA post all the amateur official reports ahead of in-depth iinvestigations into their tornado reports. They run a course for storm watchers who post reports to the Stormwatch agency and these are collated and posted on the NWS site
The NWS hold archives of these unofficial official reports going back many years. At the time of posting, this was the last date where tornadoes were involved:
There were 10 tornado, 41 high wind, 5 hail and 56 reports in total.
The tornadoes are shown in red, hail in green and winds in blue.
Note there is one blue dot in the Mid-West, a region fairly thinly populated. OTOH in a flat plain reporters can view much wider landscapes than is the case in hilly areas. The graphic portrays the number of reports not the actual final account of them.
The biggest bugbear of course is that tornadoes travel across the north of Mexico and the south of Canada too but those countries have not felt the need to connect to the service or set up their own, which makes a truer study of the forecasting of tornadoes even more difficult than it might be.
It will be impossible to find, for example the positings of the moon and their times of phases in time for forecasting tornadoes in the next year or two, I imagine. But every day's total of weather reports as seen by the Storm Watch Group is shared with the rest of the world. So that is at least a start isn't it?
Items such as strong winds and precipitation are reported and thus collected and posted to the archive. And for making a 24 hour forecast that is enough.
This is a picture of the Atlantic
the day before the tornadoes at about the time of the relevant tornadoes. Of course, the Atlantic forecast gives plenty of warning by at least 5 days The situation of interest concerns the development of three pressure systems:
1. An High of 1016 millibars over Greenland in the centre top of the chart.
2. A Low of 986 immediately below the Greenland High. (Centre of chart between Newfoundland and Scotland.)
3. An High 1027 to the south-west of the Low forming a tornado spell sandwich. This High must always be to the south west. The one on this chart is over Biscay on the west of France.
The next day the pressure in the centre drops by about 5 millibars. Pressures may not always be the same but usually the central system, the Low is about 980 to 985 and drops 5 millibars by the next day:
Note the legend on this chart indicates it is from the same date as the preceding one. But if you go to the link indicated and play with the archive page loader you will see for yourself it is a different chart. There is no means of telling which chart is actually is though.
Another interesting point is that the thick black lines on the last chart show what are called Occluded Fronts. These are depicted with icons that are composed of triangles and semicircles arranged and look like cartoon mice.
On other parts of the line(s) they appear on alternate sides of the line.
This is to show which direction on a map the weather system approaches, or approached from. A triangle or series of triangles indicate a cold patch, and semicircles indicate warm air. Where they meet and are thus on the same side of the line, they are mixed.
This is called an occluded front. And they indicate something about earthquakes.
More later when you get used to things.