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Storm of the Month
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This DECEMBER was unusually quiet in the convective department however what may be
looked on as the beginning of the winter El Nino rains paid a visit to the Magnolia
State on the 23rd and 24th. Heavy rains fell over much of the area and since no
particular thunderstorm stood out for our pick of the month, here is an image of
the Storm Total Precipitation. The time period was about 20 hours of rainfall
ending around midnight at the start of the 24th. Rains ended up being
frequently in the 2 to 4 inch range for this case. Many times during persistent
heavy rains, the radar underestimates the rainfall and especially within 40nm
of the radar dome. In this particular case, just over 3 inches fell at the
Jackson radar site again pointing to the need for careful interpretation of the
available imagery.
20-Hour Storm Total Precipitation
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An unrelated note for December:
The surprise of the month was a most unusual 60nm wide band of 3 to 6 inch snowfall which
occurred over central Mississippi on the 14th. Radar presentations of snow
remain quite unimpressive and this case was no exception as a cold core upper
level low pressure center deepened along the Gulf Coast. Research continues
in developing snowfall algorithms to help in handling these cases.
Visible Satellite Picture of Snow Cover 845AM 15 Dec.1997
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