Alberta Hailstorms by A. J. Chisholm, Marianne English (auth.) PDF

By A. J. Chisholm, Marianne English (auth.)

ISBN-10: 193570432X

ISBN-13: 9781935704324

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Z. z. The airflow for the storm of 27 ] une 1967 has been shown in Figs. 48 and 49 in a different fashion than NovEMBER 1973 25 A. ]. , : ' ''28 ------ , ___ ... ,' ' 1{ I ........ __ 0 6 4 8 HORIZONTAL 10 DISTANCE 12 14 16 18 20 22 24 (km} FIG. 32. Schematic airflow in the plane of storm motion, for Phase II, 28 July 1968, superimposed on the radar vertical cross section taken along line AB of Fig. 30. Wind components relative to the storm (in the plane of storm motion) are shown on the left-hand side.

From these studies a model of severe storms (the Browning SR model) was advanced. However, while the Browning SR model evidently applies to an important category of severe storms, there are many other types which it does not explain. Since these storms presumably also contain an updraft, it is only reasonable to expect them to exhibit a weak-echo region also, though not necessarily in the form of a cone-shaped vault. This study has been aimed at this aspect of severe storm research, in an attempt to increase our understanding of various types of severe storms.

A. ]. CHISHOLM NovEMBER 1973 29 this respect, it provides the location of the updraft summit. The visual storm anvil and the low reflectivity plume structure are indicative of the direction of storm outflow at the storm top since they consist of ice particles with relatively low fall speeds which are carried downwind in the storm outflow. 5) COMPUTED UPDRAFTS AND MID- AND HIGH-LEVEL WINDS. The computed updraft obtained from the LMA model may be used with the relative wind structure as an independent source of evidence in deducing the airflow.

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Alberta Hailstorms by A. J. Chisholm, Marianne English (auth.)


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