GOES-10 Science Test

Weather Synopsis - 12 April/12UTC to 13 April/12UTC 1998






Synoptic Situation:


A broad trough of low pressure aloft covered the western
half of the US, with an embedded shortwave approaching
the Pacific Northwest. A ridge of high pressure aloft was 
located over the Ohio Valley into the Great Lakes region,
while a weakening trough persisted off the East Coast.
The jet stream was located across the southern tier
of states, with a 130-150 knot core over the Southwest.



At the surface, a well-developed low was moving from
the eastern Dakotas into northern Minnesota. A trailing
cold front stretched southward into a secondary low over 
Kansas. High pressure covered the Eastern US. A low was
approaching the Pacific Northwest.


Weather Conditions:


Strong convection developed from the central Plains to
the Great Lakes region.  Large hail was reported in
Iowa (up to 1.75 inch in diameter), Nebraska( up to 1.0 inch)
and Missouri (up to 0.75 inch), while damaging winds were
observed across parts of Iowa (gusts up to 59 knots),
Nebraska (gusts to 52 knots) and Wisconsin.


Precipitation was widespread across the West Coast, Rockies,
northern Plains, Mississippi Valley, and Great Lakes regions.
Amounts were generally light, but some stations reported
0.25-0.50 inch in northern California, the Great Basin,
and the northern Plains.