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You are at: HUN
Home » Remembering May 18, 1995 » Weather Data
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Weather Data
Weather Synopsis
At the surface, a strong area
of low pressure was centered over the mid-Mississippi River
Valley on the morning of the 18th. A stationary front extended
from the low into the Ohio Valley. A strong cold front trailed
from the low in Missouri southward into Eastern Texas and into
the Rio Grande Valley. Ahead of the cold front, winds were south
to southwest, advecting warm, moist Gulf of Mexico moisture
into the southeastern states. Throughout the day, the strong
area of low pressure advanced along the Ohio River to near the
tri-state region of Illinois, Indiana, and Kentucky by early
evening. The cold front continued to advance east and was positioned
from near Paducah, Kentucky to near Memphis, Tennessee to Monroe,
Louisiana to near Lake Charles, LA by early evening. Strong
southwest flow continued ahead of the front, pumping moisture
into the Tennessee Valley region.
 Aloft,
a 500mb trough axis extended along the Mississippi River Valley,
with jet stream maximums noted over the northeast United States
and from Arizona eastward into Texas. A strong 500mb vorticity
maximum passed north of the Tennessee Valley during the day.
Also, strong instability was noted across the region. Evening
analyses indicated Lifted indices of as low as -8, Total Totals
indices around 53, Sweat indices in the 300s, and helicities
between 300 and 500. The evening sounding at Birmingham (see
image at right) indicated strong low-level shear, dry air in
the mid levels of the atmosphere, and impressive instability.
Radar Imagery
Loop
of images from 5:00 PM-6:30 PM
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