GOES-10 Science Test
Weather Synopsis - 09 April/12UTC to 10 April/12UTC 1998

Synoptic Situation:

An upper level trough of low pressure was intensifying off the West Coast of the US, while an upper level ridge was building over the Rocky Mountain region. A broad trough was situated over the Great Lakes region and the eastern US. The jet stream remained across the southern tier of states, with a stronger 110-130 knot core approaching California.

At the surface, an elongated trough remained from the Ohio Valley into the Mid-Atlantic regions, as a cold front moved off the East Coast and into the Atlantic. A weak low and associated cold front were entering the Pacific Northwest, while a trough moved from the northern Rockies into the northern Plains.

Weather Conditions:

A few weak (F0) tornadoes caused wind damage across northeastern Ohio. Several reports of large hail (up to 1.75 inches in diameter) and wind damage (gusts to 77 mph) were reported across eastern Virgina and North Carolina (a possible tornado was also reported near Norfolk, VA). Hail up to 1.0 inch in diameter was reported near Augusta, Georgia.

Lingering precipitation was reported across the Ohio Valley region and along the East Coast, with some amounts of 1-2 inches reported. Some of this rain changed to snow across the Northeast, with 5 inches accumulating in High Point, New Jersey.

Light precipitation amounts (less than 0.25 inch) were reported across the Pacific Northwest, northern California, the northern Rockies, and parts of the High Plains region.