After replying to Don's note on the first tornado forecast, I decided to look at the other
events occurring about the same time. Tornado season began in 1948 on March 16 -
(you will note this is the same date as the large geomagnetic storm mentioned above).
On that day about 3 hours after the height of the geomagnetic storm the most destructive
tornado of the year 1948 (to that date) hit near Colbert Alabama leveling 73 buildings and
causing damage estimated at $200,000+. No significant tornado cells had been reported
earlier in the year, although there had been isolated tornados. From March 16 to
March 19 there were 30 tornados reported to have done damage throughout Oklahoma,
Kamsas, Georgia, Missouri, Illinois, Indiana, Kentucky, Ohio, Pennsylvannia, Maryland
and North Carolina. Two of these were Force 4 - one leveling 80% of Bunker Hill, Illinois
on March 19 and killing 19. Total cost of this paroxysm of tornadic activity was
more than $10 million.
However, the Oklahoma tornado on March 20 caused $11 million damage alone- the
largest damage of any Oklahoma tornado to that date. The event on March 25 hit less
than 100 ft from the one on March 20 and caused an additional $6 million damage. The later
system moved on into the midwest killing 14 and destroying 80% of the buildings in
Coatsville, Indiana and causing an additional $3 million damages there - unfortunately,
that one was not forecast.
It does seem, however, that this discussion should naturally lead to something dealing
with earthquakes, since that is the topic of this website. So, I will not try to make the
connection. The great geomagnetic storm began at about 03:00 UT on March 15, 1948
when Japan was at local noontime (sub-solar). At 11:23 there was a Mb 6.0 earthquake
recorded just west of Tokyo which did local damage in that area (and coincidentally
for which earthquake lights were reported). Connection made.

A good reference for historical tornados is the book:
"Significant Tornados 1680-1991" by Thomas Grazulis, Copyright July 1993, Environmental
Films, St. Johnsbury, Vermont