On Aug 13, 8:58 am, Weatherlawyer <weatherlaw...
From chapter 2 of the book Storm by Victor Bosen:
What excited Krick was something he picked up in Leipzig from
Professor Gerhard Wieckman. Wieckman told him he had discovered that
there was a systematic progression of local barometric pressures which
registered on a barograph, an instrument for recording air pressures
at the earth's surface:
"I can make long-range forecasts from this,"
Krick was convinced that the Germans were closer to long-range weather
prediction than anyone else. What he learned that day in the German
woods, combined with further researches at CalTech, would have a
bearing on the outcome of the coming war.
"I feel there is a good possibility that we will be able to make
forecasts that go far out-well beyond where people are working today,"
Krick told Dr. Millikan, who directed Krick to press on with his
Did the weather behave chaotically, as many argued (and still do), or
were there orderly, recurring patterns to it?
Krick and his students began to examine the entire complex of wind
systems for as much of the globe as they could. By diligent search and
persistence they were able to collect weather data going back five
years for most of the Northern Hemisphere-Eastern Asia, the Pacific,
North America, the Atlantic and Europe.
By the late thirties they had established that they could group
barometric pressure patterns and related daily weather in blocks of
six days. They found there was a finite number of these patterns, or
weather types, as they called them, for each octant of the globe, or
for each quadrant of a hemisphere. They were able to classify and
catalogue all weather types occurring within the five years they had
The six-day weather types became the building blocks, providing a
basis for long-range forecasting. Once a weather type was identified,
the weather across one quadrant of the hemisphere could be predicted
at any location for the next six days.
The pressure configurations for a given type were found to be the same
in winter as in summer, irrespective of conditions at the earth's
surface. This indicated that control did, indeed, come from the upper
atmosphere, far above the earth.
However, the weather associated with each pattern changed with the
Thus, if one could determine the sequence in which these weather types
occurred for a month, a season, or years ahead, the way was open to
make ultra long-range weather forecasts. Krick and his associates
would reach this achievement in the late 1950s.